Merge branch 'master' into staging

79 files changed, 3687 insertions, 493 deletions

diff --git a/Makefile.am b/Makefile.am
index 8df8222573..502ca73866 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -533,6 +533,7 @@ SCM_TESTS =					\
   tests/services.scm				\
   tests/services/file-sharing.scm		\
   tests/services/configuration.scm		\
+  tests/services/lightdm.scm			\
   tests/services/linux.scm			\
   tests/services/telephony.scm			\
   tests/sets.scm				\
diff --git a/doc/contributing.texi b/doc/contributing.texi
index 02c7c5ae59..b1d236c011 100644
--- a/doc/contributing.texi
+++ b/doc/contributing.texi
@@ -320,15 +320,25 @@ s-expression, etc.
 @cindex reducing boilerplate
 We also provide templates for common git commit messages and package
 definitions in the @file{etc/snippets} directory.  These templates can
-be used with @url{https://joaotavora.github.io/yasnippet/, YASnippet} to
-expand short trigger strings to interactive text snippets.  You may want
-to add the snippets directory to the @var{yas-snippet-dirs} variable in
+be used to expand short trigger strings to interactive text snippets. If
+you use @url{https://joaotavora.github.io/yasnippet/, YASnippet}, you
+may want to add the @file{etc/snippets/yas} snippets directory to the
+@var{yas-snippet-dirs} variable.  If you use
+@url{https://github.com/minad/tempel/, Tempel}, you may want to add the
+@file{etc/snippets/tempel/*} path to the @var{tempel-path} variable in
 Emacs.
 
 @lisp
 ;; @r{Assuming the Guix checkout is in ~/src/guix.}
+;; @r{Yasnippet configuration}
 (with-eval-after-load 'yasnippet
-  (add-to-list 'yas-snippet-dirs "~/src/guix/etc/snippets"))
+  (add-to-list 'yas-snippet-dirs "~/src/guix/etc/snippets/yas"))
+;; @r{Tempel configuration}
+(with-eval-after-load 'tempel
+   ;; Ensure tempel-path is a list -- it may also be a string.
+   (unless (listp 'tempel-path)
+     (setq tempel-path (list tempel-path)))
+   (add-to-list 'tempel-path "~/src/guix/etc/snippets/tempel/*"))
 @end lisp
 
 The commit message snippets depend on @url{https://magit.vc/, Magit} to
diff --git a/doc/guix.texi b/doc/guix.texi
index 7bce8a567c..957b9a668e 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -21278,6 +21278,208 @@ Relogin after logout.
 @end table
 @end deftp
 
+@cindex lightdm, graphical login manager
+@cindex display manager, lightdm
+@defvr {Scheme Variable} lightdm-service-type
+This is the type of the service to run the
+@url{https://github.com/canonical/lightdm,LightDM display manager}.  Its
+value must be a @code{lightdm-configuration} record, which is documented
+below.  Among its distinguishing features are TigerVNC integration for
+easily remoting your desktop as well as support for the XDMCP protocol,
+which can be used by remote clients to start a session from the login
+manager.
+
+In its most basic form, it can be used simply as:
+
+@lisp
+(service lightdm-service-type)
+@end lisp
+
+A more elaborate example making use of the VNC capabilities and enabling
+more features and verbose logs could look like:
+
+@lisp
+(service lightdm-service-type
+         (lightdm-configuration
+          (allow-empty-passwords? #t)
+          (xdmcp? #t)
+          (vnc-server? #t)
+          (vnc-server-command
+           (file-append tigervnc-server "/bin/Xvnc"
+                        "  -SecurityTypes None"))
+          (seats
+           (list (lightdm-seat-configuration
+                  (name "*")
+                  (user-session "ratpoison"))))))
+@end lisp
+@end defvr
+
+@c The LightDM service documentation can be auto-generated via the
+@c 'generate-doc' procedure at the bottom of the (gnu services lightdm)
+@c module.
+@c %start of fragment
+@deftp {Data Type} lightdm-configuration
+Available @code{lightdm-configuration} fields are:
+
+@table @asis
+@item @code{lightdm} (default: @code{lightdm}) (type: file-like)
+The lightdm package to use.
+
+@item @code{allow-empty-passwords?} (default: @code{#f}) (type: boolean)
+Whether users not having a password set can login.
+
+@item @code{debug?} (default: @code{#f}) (type: boolean)
+Enable verbose output.
+
+@item @code{xorg-configuration} (type: xorg-configuration)
+The default Xorg server configuration to use to generate the Xorg server
+start script.  It can be refined per seat via the @code{xserver-command}
+of the @code{<lightdm-seat-configuration>} record, if desired.
+
+@item @code{greeters} (type: list-of-greeter-configurations)
+The LightDM greeter configurations specifying the greeters to use.
+
+@item @code{seats} (type: list-of-seat-configurations)
+The seat configurations to use.  A LightDM seat is akin to a user.
+
+@item @code{xdmcp?} (default: @code{#f}) (type: boolean)
+Whether a XDMCP server should listen on port UDP 177.
+
+@item @code{xdmcp-listen-address} (type: maybe-string)
+The host or IP address the XDMCP server listens for incoming
+connections.  When unspecified, listen on for any hosts/IP addresses.
+
+@item @code{vnc-server?} (default: @code{#f}) (type: boolean)
+Whether a VNC server is started.
+
+@item @code{vnc-server-command} (type: file-like)
+The Xvnc command to use for the VNC server, it's possible to provide
+extra options not otherwise exposed along the command, for example to
+disable security:
+
+@lisp
+(vnc-server-command (file-append tigervnc-server "/bin/Xvnc"
+                                 " -SecurityTypes None" ))
+@end lisp
+
+Or to set a PasswordFile for the classic (unsecure) VncAuth
+mecanism:
+
+@lisp
+(vnc-server-command (file-append tigervnc-server "/bin/Xvnc"
+                                 " -PasswordFile /var/lib/lightdm/.vnc/passwd"))
+@end lisp
+
+The password file should be manually created using the
+@command{vncpasswd} command.  Note that LightDM will create new sessions
+for VNC users, which means they need to authenticate in the same way as
+local users would.
+
+@item @code{vnc-server-listen-address} (type: maybe-string)
+The host or IP address the VNC server listens for incoming connections.
+When unspecified, listen for any hosts/IP addresses.
+
+@item @code{vnc-server-port} (default: @code{5900}) (type: number)
+The TCP port the VNC server should listen to.
+
+@item @code{extra-config} (default: @code{()}) (type: list-of-strings)
+Extra configuration values to append to the LightDM configuration file.
+
+@end table
+@end deftp
+
+
+@c %end of fragment
+@c %start of fragment
+
+@deftp {Data Type} lightdm-gtk-greeter-configuration
+Available @code{lightdm-gtk-greeter-configuration} fields are:
+
+@table @asis
+@item @code{lightdm-gtk-greeter} (default: @code{lightdm-gtk-greeter}) (type: file-like)
+The lightdm-gtk-greeter package to use.
+
+@item @code{assets} @
+(default: @code{(adwaita-icon-theme gnome-themes-extrahicolor-icon-theme)}) @
+(type: list-of-file-likes)
+The list of packages complementing the greeter, such as package
+providing icon themes.
+
+@item @code{theme-name} (default: @code{"Adwaita"}) (type: string)
+The name of the theme to use.
+
+@item @code{icon-theme-name} (default: @code{"Adwaita"}) (type: string)
+The name of the icon theme to use.
+
+@item @code{cursor-theme-name} (default: @code{"Adwaita"}) (type: string)
+The name of the cursor theme to use.
+
+@item @code{cursor-theme-size} (default: @code{16}) (type: number)
+The size to use for the the cursor theme.
+
+@item @code{allow-debugging?} (type: maybe-boolean)
+Set to #t to enable debug log level.
+
+@item @code{background} (type: file-like)
+The background image to use.
+
+@item @code{at-spi-enabled?} (default: @code{#f}) (type: boolean)
+Enable accessibility support through the Assistive Technology Service
+Provider Interface (AT-SPI).
+
+@item @code{a11y-states} @
+(default: @code{(contrast font keyboard reader)}) (type: list-of-a11y-states)
+The accessibility features to enable, given as list of symbols.
+
+@item @code{reader} (type: maybe-file-like)
+The command to use to launch a screen reader.
+
+@item @code{extra-config} (default: @code{()}) (type: list-of-strings)
+Extra configuration values to append to the LightDM GTK Greeter
+configuration file.
+
+@end table
+@end deftp
+
+@c %end of fragment
+@c %start of fragment
+
+@deftp {Data Type} lightdm-seat-configuration
+Available @code{lightdm-seat-configuration} fields are:
+
+@table @asis
+@item @code{name} (type: seat-name)
+The name of the seat.  An asterisk (*) can be used in the name to apply
+the seat configuration to all the seat names it matches.
+
+@item @code{user-session} (type: maybe-string)
+The session to use by default.  The session name must be provided as a
+lowercase string, such as @code{"gnome"}, @code{"ratpoison"}, etc.
+
+@item @code{type} (default: @code{local}) (type: seat-type)
+The type of the seat, either the @code{local} or @code{xremote} symbol.
+
+@item @code{autologin-user} (type: maybe-string)
+The username to automatically log in with by default.
+
+@item @code{greeter-session} @
+(default: @code{lightdm-gtk-greeter}) (type: greeter-session)
+The greeter session to use, specified as a symbol.  Currently, only
+@code{lightdm-gtk-greeter} is supported.
+
+@item @code{xserver-command} (type: maybe-file-like)
+The Xorg server command to run.
+
+@item @code{session-wrapper} (type: file-like)
+The xinitrc session wrapper to use.
+
+@item @code{extra-config} (default: @code{()}) (type: list-of-strings)
+Extra configuration values to append to the seat configuration section.
+
+@end table
+@end deftp
+@c %end of fragment
+
 
 @cindex Xorg, configuration
 @deftp {Data Type} xorg-configuration
@@ -36311,6 +36513,255 @@ Extra command line options for @code{nix-service-type}.
 @end table
 @end deftp
 
+@cindex Fail2Ban
+@subsubheading Fail2Ban service
+
+@uref{http://www.fail2ban.org/, @code{fail2ban}} scans log files
+(e.g. @code{/var/log/apache/error_log}) and bans IP addresses that show
+malicious signs -- repeated password failures, attempts to make use of
+exploits, etc.
+
+@code{fail2ban-service-type} service type is provided by the @code{(gnu
+services security)} module.
+
+This service type runs the @code{fail2ban} daemon.  It can be configured
+in various ways, which are:
+
+@table @asis
+@item Basic configuration
+The basic parameters of the Fail2Ban service can be configured via its
+@code{fail2ban} configuration, which is documented below.
+
+@item User-specified jail extensions
+The @code{fail2ban-jail-service} function can be used to add new
+Fail2Ban jails.
+
+@item Shepherd extension mechanism
+Service developers can extend the @code{fail2ban-service-type} service
+type itself via the usual service extension mechanism.
+@end table
+
+@defvr {Scheme Variable} fail2ban-service-type
+
+This is the type of the service that runs @code{fail2ban} daemon.  Below
+is an example of a basic, explicit configuration:
+
+@lisp
+(append
+ (list
+  (service fail2ban-service-type
+           (fail2ban-configuration
+            (extra-jails
+             (list
+              (fail2ban-jail-configuration
+               (name "sshd")
+               (enabled #t))))))
+  ;; There is no implicit dependency on an actual SSH
+  ;; service, so you need to provide one.
+  (service openssh-service-type))
+ %base-services)
+@end lisp
+@end defvr
+
+@deffn {Scheme Procedure} fail2ban-jail-service @var{svc-type} @var{jail}
+Extend @var{svc-type}, a @code{<service-type>} object with @var{jail}, a
+@code{fail2ban-jail-configuration} object.
+
+For example:
+
+@lisp
+(append
+ (list
+  (service
+   ;; The 'fail2ban-jail-service' procedure can extend any service type
+   ;; with a fail2ban jail.  This removes the requirement to explicitly
+   ;; extend services with fail2ban-service-type.
+   (fail2ban-jail-service
+    openssh-service-type
+    (fail2ban-jail-configuration
+     (name "sshd")
+     (enabled #t)))
+   (openssh-configuration ...))))
+@end lisp
+@end deffn
+
+Below is the reference for the different @code{jail-service-type}
+configuration records.
+
+@c The documentation is to be auto-generated via
+@c 'generate-documentation'.  See at the bottom of (gnu services
+@c security).
+
+@deftp {Data Type} fail2ban-configuration
+Available @code{fail2ban-configuration} fields are:
+
+@table @asis
+@item @code{fail2ban} (default: @code{fail2ban}) (type: package)
+The @code{fail2ban} package to use.  It is used for both binaries and as
+base default configuration that is to be extended with
+@code{<fail2ban-jail-configuration>} objects.
+
+@item @code{run-directory} (default: @code{"/var/run/fail2ban"}) (type: string)
+The state directory for the @code{fail2ban} daemon.
+
+@item @code{jails} (default: @code{()}) (type: list-of-fail2ban-jail-configurations)
+Instances of @code{<fail2ban-jail-configuration>} collected from
+extensions.
+
+@item @code{extra-jails} (default: @code{()}) (type: list-of-fail2ban-jail-configurations)
+Instances of @code{<fail2ban-jail-configuration>} explicitly provided.
+
+@item @code{extra-content} (type: maybe-string)
+Extra raw content to add to the end of the @file{jail.local} file.
+
+@end table
+
+@end deftp
+
+@deftp {Data Type} fail2ban-ignore-cache-configuration
+Available @code{fail2ban-ignore-cache-configuration} fields are:
+
+@table @asis
+@item @code{key} (type: string)
+Cache key.
+
+@item @code{max-count} (type: integer)
+Cache size.
+
+@item @code{max-time} (type: integer)
+Cache time.
+
+@end table
+
+@end deftp
+
+@deftp {Data Type} fail2ban-jail-action-configuration
+Available @code{fail2ban-jail-action-configuration} fields are:
+
+@table @asis
+@item @code{name} (type: string)
+Action name.
+
+@item @code{arguments} (default: @code{()}) (type: list-of-arguments)
+Action arguments.
+
+@end table
+
+@end deftp
+
+@deftp {Data Type} fail2ban-jail-configuration
+Available @code{fail2ban-jail-configuration} fields are:
+
+@table @asis
+@item @code{name} (type: string)
+Required name of this jail configuration.
+
+@item @code{enabled?} (default: @code{#t}) (type: boolean)
+Whether this jail is enabled.
+
+@item @code{backend} (type: maybe-symbol)
+Backend to use to detect changes in the @code{ogpath}.  The default is
+'auto.  To consult the defaults of the jail configuration, refer to the
+@file{/etc/fail2ban/jail.conf} file of the @code{fail2ban} package.
+
+@item @code{max-retry} (type: maybe-integer)
+The number of failures before a host get banned (e.g.  @code{(max-retry
+5)}).
+
+@item @code{max-matches} (type: maybe-integer)
+The number of matches stored in ticket (resolvable via tag
+@code{<matches>}) in action.
+
+@item @code{find-time} (type: maybe-string)
+The time window during which the maximum retry count must be reached for
+an IP address to be banned.  A host is banned if it has generated
+@code{max-retry} during the last @code{find-time} seconds (e.g.
+@code{(find-time "10m")}).  It can be provided in seconds or using
+Fail2Ban's "time abbreviation format", as described in @command{man 5
+jail.conf}.
+
+@item @code{ban-time} (type: maybe-string)
+The duration, in seconds or time abbreviated format, that a ban should
+last.  (e.g.  @code{(ban-time "10m")}).
+
+@item @code{ban-time-increment?} (type: maybe-boolean)
+Whether to consider past bans to compute increases to the default ban
+time of a specific IP address.
+
+@item @code{ban-time-factor} (type: maybe-string)
+The coefficient to use to compute an exponentially growing ban time.
+
+@item @code{ban-time-formula} (type: maybe-string)
+This is the formula used to calculate the next value of a ban time.
+
+@item @code{ban-time-multipliers} (type: maybe-string)
+Used to calculate next value of ban time instead of formula.
+
+@item @code{ban-time-max-time} (type: maybe-string)
+The maximum number of seconds a ban should last.
+
+@item @code{ban-time-rnd-time} (type: maybe-string)
+The maximum number of seconds a randomized ban time should last.  This
+can be useful to stop ``clever'' botnets calculating the exact time an
+IP address can be unbanned again.
+
+@item @code{ban-time-overall-jails?} (type: maybe-boolean)
+When true, it specifies the search of an IP address in the database
+should be made across all jails.  Otherwise, only the current jail of
+the ban IP address is considered.
+
+@item @code{ignore-self?} (type: maybe-boolean)
+Never ban the local machine's own IP address.
+
+@item @code{ignore-ip} (default: @code{()}) (type: list-of-strings)
+A list of IP addresses, CIDR masks or DNS hosts to ignore.
+@code{fail2ban} will not ban a host which matches an address in this
+list.
+
+@item @code{ignore-cache} (type: maybe-fail2ban-ignore-cache-configuration)
+Provide cache parameters for the ignore failure check.
+
+@item @code{filter} (type: maybe-fail2ban-jail-filter-configuration)
+The filter to use by the jail, specified via a
+@code{<fail2ban-jail-filter-configuration>} object.  By default, jails
+have names matching their filter name.
+
+@item @code{log-time-zone} (type: maybe-string)
+The default time zone for log lines that do not have one.
+
+@item @code{log-encoding} (type: maybe-symbol)
+The encoding of the log files handled by the jail.  Possible values are:
+@code{'ascii}, @code{'utf-8} and @code{'auto}.
+
+@item @code{log-path} (default: @code{()}) (type: list-of-strings)
+The file names of the log files to be monitored.
+
+@item @code{action} (default: @code{()}) (type: list-of-fail2ban-jail-actions)
+A list of @code{<fail2ban-jail-action-configuration>}.
+
+@item @code{extra-content} (type: maybe-string)
+Extra content for the jail configuration.
+
+@end table
+
+@end deftp
+
+@deftp {Data Type} fail2ban-jail-filter-configuration
+Available @code{fail2ban-jail-filter-configuration} fields are:
+
+@table @asis
+@item @code{name} (type: string)
+Filter to use.
+
+@item @code{mode} (type: maybe-string)
+Mode for filter.
+
+@end table
+
+@end deftp
+
+@c End of auto-generated fail2ban documentation.
+
 @node Setuid Programs
 @section Setuid Programs
 
@@ -36988,6 +37439,15 @@ corresponds to COM1 (@pxref{Serial terminal,,, grub,GNU GRUB manual}).
 The speed of the serial interface, as an integer.  For GRUB, the
 default value is chosen at run-time; currently GRUB chooses
 9600@tie{}bps (@pxref{Serial terminal,,, grub,GNU GRUB manual}).
+
+@item @code{device-tree-support?} (default: @code{#t})
+Whether to support Linux @uref{https://en.wikipedia.org/wiki/Devicetree,
+device tree} files loading.
+
+This option in enabled by default.  In some cases involving the
+@code{u-boot} bootloader, where the device tree has already been loaded
+in RAM, it can be handy to disable the option by setting it to
+@code{#f}.
 @end table
 
 @end deftp
@@ -37561,6 +38021,11 @@ Installation Image}).
 Attempt to build for @var{system} instead of the host system type.
 This works as per @command{guix build} (@pxref{Invoking guix build}).
 
+@item --target=@var{triplet}
+Cross-build for @var{triplet}, which must be a valid GNU triplet, such
+as @code{"aarch64-linux-gnu"} (@pxref{Specifying target triplets, GNU
+configuration triplets,, autoconf, Autoconf}).
+
 @item --derivation
 @itemx -d
 Return the derivation file name of the given operating system without
diff --git a/etc/snippets/tempel/scheme-mode b/etc/snippets/tempel/scheme-mode
new file mode 100644
index 0000000000..54cb8e40a9
--- /dev/null
+++ b/etc/snippets/tempel/scheme-mode
@@ -0,0 +1,89 @@
+-*- mode: lisp-data -*-
+
+scheme-mode
+
+(package...
+ "(define-public " (s name)
+ n> "(package"
+ n  > "(name \"" (s name) "\")"
+ n  > "(version \"" p "\")"
+ n  > "(source origin...)"
+ n  > "(build-system " (p "gnu") "-build-system)"
+ n  > "(home-page \"" p "\")"
+ n  > "(synopsis \"" p "\")"
+ n  > "(description \"" p "\")"
+ n  > "(license license:" (p "unknown") ")))" n)
+
+(origin...
+ "(origin"
+ n> "(method " (p "url-fetch" method) ")"
+ n> "(uri " (cl-case (and method (intern method))
+              ('git-fetch "git-reference...")
+              ('svn-fetch "svn-reference...")
+              ('hg-fetch  "hg-reference...")
+              ('cvs-fetch "cvs-reference...")
+              ('bzr-fetch "bzr-reference...")
+              (t          "\"https://...\""))
+ ")"
+ n>
+ (cl-case (and method (intern method))
+   ('git-fetch
+    (insert "(file-name (git-file-name name version))")
+    (newline)
+    (indent-according-to-mode))
+   ('hg-fetch
+    (insert "(file-name (hg-file-name name version))")
+    (newline)
+    (indent-according-to-mode))
+   ('svn-fetch
+    (insert "(file-name (string-append name \"-\" version \"-checkout\"))")
+    (newline)
+    (indent-according-to-mode))
+   ('cvs-fetch
+    (insert "(file-name (string-append name \"-\" version \"-checkout\"))")
+    (newline)
+    (indent-according-to-mode))
+   ('bzr-fetch
+    (insert "(file-name (string-append name \"-\" version \"-checkout\"))")
+    (newline)
+    (indent-according-to-mode))
+   (t          ""))
+ > "(sha256"
+ n > "(base32 \""
+ ;; hash of an empty directory
+ (p "0sjjj9z1dhilhpc8pq4154czrb79z9cm044jvn75kxcjv6v5l2m5") "\")))")
+
+(git-reference...
+ "(git-reference"
+ n> "(url \"" p "\")"
+ n> "(commit \"" p "\"))")
+
+(svn-reference...
+ "(svn-reference"
+ n> "(url \"" p "\")"
+ n> "(revision \"" p "\"))")
+
+(cvs-reference...
+ "(cvs-reference"
+ n> "(root-directory \"" p "\")"
+ n> "(module \"" p "\")"
+ n> "(revision \"" p "\"))")
+
+(hg-reference...
+ "(hg-reference"
+ n> "(url \"" p "\")"
+ n> "(changeset \"" p "\"))")
+
+(bzr-reference...
+ "(bzr-reference"
+ n> "(url \"" p "\")"
+ n> "(revision \"" p "\"))")
+
+(:phases\ "#:phases (modify-phases %standard-phases"
+          n> p ")")
+
+(add-before\ "(add-before '" p " '" p
+             n > p ")")
+(add-after\ "(add-after '" p " '" p
+            n > p ")")
+(replace\ "(replace '" p " " p")")
diff --git a/etc/snippets/tempel/text-mode b/etc/snippets/tempel/text-mode
new file mode 100644
index 0000000000..a1400aac69
--- /dev/null
+++ b/etc/snippets/tempel/text-mode
@@ -0,0 +1,101 @@
+-*- mode: lisp-data -*-
+
+text-mode :when (and (fboundp 'git-commit-mode) (git-commit-mode))
+
+(add\ 
+ "gnu: Add "
+ (p
+  (with-temp-buffer
+    (magit-git-wash #'magit-diff-wash-diffs
+      "diff" "--staged")
+    (goto-char (point-min))
+    (when (re-search-forward "\\+(define-public \\(\\S-+\\)" nil 'noerror)
+      (match-string-no-properties 1)))
+  var ) "." n n
+ "* " (car (magit-staged-files)) " (" (s var ) "): New variable.")
+
+(remove\ 
+ "gnu: Remove "
+ (p (with-temp-buffer
+      (magit-git-wash #'magit-diff-wash-diffs
+        "diff" "--staged")
+      (goto-char (point-min))
+      (when (re-search-forward "\\-(define-public \\(\\S-+\\)" nil 'noerror)
+        (match-string-no-properties 1)))
+    var) "." n n
+ "* " (car (magit-staged-files)) " (" (s var) "): Delete variable.")
+
+(rename\ 
+ "gnu: "
+ (p (with-temp-buffer
+      (magit-git-wash #'magit-diff-wash-diffs
+        "diff" "--staged")
+      (beginning-of-buffer)
+      (when (search-forward "-(define-public " nil 'noerror)
+        (thing-at-point 'sexp 'no-properties)))
+    prev-var)
+ ": Rename package to "
+ (p (with-temp-buffer
+      (magit-git-wash #'magit-diff-wash-diffs
+        "diff" "--staged")
+      (beginning-of-buffer)
+      (when (search-forward "+(define-public " nil 'noerror)
+        (thing-at-point 'sexp 'no-properties)))
+    new-var) "." n n
+ "* " (car (magit-staged-files)) " (" (s prev-var) "): Define in terms of" n
+ "'deprecated-package'." n
+ "(" (s new-var) "): New variable, formerly known as \"" (s prev-var) "\".")
+
+(update\ 
+ "gnu: "
+ (p (with-temp-buffer
+      (magit-git-wash #'magit-diff-wash-diffs
+        "diff" "--staged")
+      (goto-char (point-min))
+      (when (re-search-forward "^[ ]*(define-public \\(\\S-+\\)" nil 'noerror)
+        (match-string-no-properties 1)))
+    var)
+ ": Update to "
+ (p (with-temp-buffer
+      (magit-git-wash #'magit-diff-wash-diffs
+        "diff" "--staged")
+      (goto-char (point-min))
+      (search-forward "name" nil 'noerror)
+      (search-forward "+" nil 'noerror)   ; first change
+      (when (and (search-forward "version " nil 'noerror)
+                 (looking-at-p "\""))
+        (let ((end (save-excursion (search-forward "\")" nil 'noerror))))
+          (when end
+            (forward-char)
+            (buffer-substring-no-properties (point) (- end 2))))))
+    version) "." n n
+ "* " (car (magit-staged-files)) " (" (s var) "): Update to " (s version) "."
+ (mapconcat (lambda (file) (concat "* " file)) (cdr (magit-staged-files))) n)
+
+(addcl\ 
+ "gnu: Add cl-"
+ (p (replace-regexp-in-string
+     "^cl-" "" (with-temp-buffer
+                 (magit-git-wash #'magit-diff-wash-diffs
+                   "diff" "--staged")
+                 (beginning-of-buffer)
+                 (when (search-forward "+(define-public " nil 'noerror)
+                   (replace-regexp-in-string
+                    "^sbcl-" ""
+                    (thing-at-point 'sexp 'no-properties)))))
+    var) "." n n
+ "* " (car (magit-staged-files))
+ " (cl-" (s var)  ", ecl-" (s var) ", sbcl-" (s var) "): New variables.")
+
+(https\ 
+ "gnu: "
+ (p (with-temp-buffer
+      (magit-git-wash #'magit-diff-wash-diffs
+        "diff" "--staged")
+      (goto-char (point-min))
+      (when (re-search-forward "^[ ]*(define-public \\(\\S-+\\)" nil 'noerror)
+        (match-string-no-properties 1)))
+    var)
+ ": Use HTTPS home page." n n
+ "* " (car (magit-staged-files)) " (" (s var) ")[home-page]: Use HTTPS." n
+ (mapconcat (lambda (file) (concat "* " file)) (cdr (magit-staged-files))) n)
diff --git a/etc/snippets/scheme-mode/guix-bzr-reference b/etc/snippets/yas/scheme-mode/guix-bzr-reference
index a801cc36f2..a801cc36f2 100644
--- a/etc/snippets/scheme-mode/guix-bzr-reference
+++ b/etc/snippets/yas/scheme-mode/guix-bzr-reference
diff --git a/etc/snippets/scheme-mode/guix-cvs-reference b/etc/snippets/yas/scheme-mode/guix-cvs-reference
index fbc5034b66..fbc5034b66 100644
--- a/etc/snippets/scheme-mode/guix-cvs-reference
+++ b/etc/snippets/yas/scheme-mode/guix-cvs-reference
diff --git a/etc/snippets/scheme-mode/guix-git-reference b/etc/snippets/yas/scheme-mode/guix-git-reference
index 29ca6a9c54..29ca6a9c54 100644
--- a/etc/snippets/scheme-mode/guix-git-reference
+++ b/etc/snippets/yas/scheme-mode/guix-git-reference
diff --git a/etc/snippets/scheme-mode/guix-hg-reference b/etc/snippets/yas/scheme-mode/guix-hg-reference
index 95de16daae..95de16daae 100644
--- a/etc/snippets/scheme-mode/guix-hg-reference
+++ b/etc/snippets/yas/scheme-mode/guix-hg-reference
diff --git a/etc/snippets/scheme-mode/guix-origin b/etc/snippets/yas/scheme-mode/guix-origin
index eb0cdc8242..eb0cdc8242 100644
--- a/etc/snippets/scheme-mode/guix-origin
+++ b/etc/snippets/yas/scheme-mode/guix-origin
diff --git a/etc/snippets/scheme-mode/guix-package b/etc/snippets/yas/scheme-mode/guix-package
index 9ff6f997d1..724a392f81 100644
--- a/etc/snippets/scheme-mode/guix-package
+++ b/etc/snippets/yas/scheme-mode/guix-package
@@ -11,6 +11,7 @@
                                           "ant-build-system"
                                           "asdf-build-system"
                                           "cargo-build-system"
+                                          "chicken-build-system"
                                           "clojure-build-system"
                                           "cmake-build-system"
                                           "copy-build-system"
@@ -27,6 +28,7 @@
                                           "linux-module-build-system"
                                           "maven-build-system"
                                           "meson-build-system"
+                                          "minetest-build-system"
                                           "minify-build-system"
                                           "node-build-system"
                                           "ocaml-build-system"
@@ -35,6 +37,8 @@
                                           "qt-build-system"
                                           "r-build-system"
                                           "rakudo-build-system"
+                                          "rebar-build-system"
+                                          "renpy-build-system"
                                           "ruby-build-system"
                                           "scons-build-system"
                                           "texlive-build-system"
diff --git a/etc/snippets/scheme-mode/guix-svn-reference b/etc/snippets/yas/scheme-mode/guix-svn-reference
index 7d897dc690..7d897dc690 100644
--- a/etc/snippets/scheme-mode/guix-svn-reference
+++ b/etc/snippets/yas/scheme-mode/guix-svn-reference
diff --git a/etc/snippets/text-mode/guix-commit-message-add-cl-package b/etc/snippets/yas/text-mode/guix-commit-message-add-cl-package
index e255736b05..e255736b05 100644
--- a/etc/snippets/text-mode/guix-commit-message-add-cl-package
+++ b/etc/snippets/yas/text-mode/guix-commit-message-add-cl-package
diff --git a/etc/snippets/text-mode/guix-commit-message-add-package b/etc/snippets/yas/text-mode/guix-commit-message-add-package
index 7cebd4023a..7cebd4023a 100644
--- a/etc/snippets/text-mode/guix-commit-message-add-package
+++ b/etc/snippets/yas/text-mode/guix-commit-message-add-package
diff --git a/etc/snippets/text-mode/guix-commit-message-remove-package b/etc/snippets/yas/text-mode/guix-commit-message-remove-package
index 0c1050f4fe..0c1050f4fe 100644
--- a/etc/snippets/text-mode/guix-commit-message-remove-package
+++ b/etc/snippets/yas/text-mode/guix-commit-message-remove-package
diff --git a/etc/snippets/text-mode/guix-commit-message-rename-package b/etc/snippets/yas/text-mode/guix-commit-message-rename-package
index 9695ca1b3d..9695ca1b3d 100644
--- a/etc/snippets/text-mode/guix-commit-message-rename-package
+++ b/etc/snippets/yas/text-mode/guix-commit-message-rename-package
diff --git a/etc/snippets/text-mode/guix-commit-message-update-package b/etc/snippets/yas/text-mode/guix-commit-message-update-package
index b08df74a0b..b08df74a0b 100644
--- a/etc/snippets/text-mode/guix-commit-message-update-package
+++ b/etc/snippets/yas/text-mode/guix-commit-message-update-package
diff --git a/etc/snippets/text-mode/guix-commit-message-use-https-home-page b/etc/snippets/yas/text-mode/guix-commit-message-use-https-home-page
index df20d31a80..df20d31a80 100644
--- a/etc/snippets/text-mode/guix-commit-message-use-https-home-page
+++ b/etc/snippets/yas/text-mode/guix-commit-message-use-https-home-page
diff --git a/gnu/bootloader.scm b/gnu/bootloader.scm
index 70e1836179..77c05e8946 100644
--- a/gnu/bootloader.scm
+++ b/gnu/bootloader.scm
@@ -1,9 +1,11 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2017 David Craven <david@craven.ch>
-;;; Copyright © 2017, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
+;;; Copyright © 2017, 2020, 2022 Mathieu Othacehe <othacehe@gnu.org>
 ;;; Copyright © 2017 Leo Famulari <leo@famulari.name>
 ;;; Copyright © 2019, 2021 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+;;; Copyright © 2022 Josselin Poiret <dev@jpoiret.xyz>
+;;; Copyright © 2022 Reza Alizadeh Majd <r.majd@pantherx.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -21,6 +23,8 @@
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gnu bootloader)
+  #:use-module (gnu system file-systems)
+  #:use-module (gnu system uuid)
   #:use-module (guix discovery)
   #:use-module (guix gexp)
   #:use-module (guix profiles)
@@ -69,6 +73,7 @@
             bootloader-configuration-terminal-inputs
             bootloader-configuration-serial-unit
             bootloader-configuration-serial-speed
+            bootloader-configuration-device-tree-support?
 
             %bootloaders
             lookup-bootloader-by-name
@@ -104,12 +109,19 @@
 
 (define (menu-entry->sexp entry)
   "Return ENTRY serialized as an sexp."
+  (define (device->sexp device)
+    (match device
+      ((? uuid? uuid)
+       `(uuid ,(uuid-type uuid) ,(uuid->string uuid)))
+      ((? file-system-label? label)
+       `(label ,(file-system-label->string label)))
+      (_ device)))
   (match entry
     (($ <menu-entry> label device mount-point linux linux-arguments initrd #f
                      ())
      `(menu-entry (version 0)
                   (label ,label)
-                  (device ,device)
+                  (device ,(device->sexp device))
                   (device-mount-point ,mount-point)
                   (linux ,linux)
                   (linux-arguments ,linux-arguments)
@@ -118,7 +130,7 @@
                      multiboot-kernel multiboot-arguments multiboot-modules)
      `(menu-entry (version 0)
                   (label ,label)
-                  (device ,device)
+                  (device ,(device->sexp device))
                   (device-mount-point ,mount-point)
                   (multiboot-kernel ,multiboot-kernel)
                   (multiboot-arguments ,multiboot-arguments)
@@ -127,6 +139,13 @@
 (define (sexp->menu-entry sexp)
   "Turn SEXP, an sexp as returned by 'menu-entry->sexp', into a <menu-entry>
 record."
+  (define (sexp->device device-sexp)
+    (match device-sexp
+      (('uuid type uuid-string)
+       (uuid uuid-string type))
+      (('label label)
+       (file-system-label label))
+      (_ device-sexp)))
   (match sexp
     (('menu-entry ('version 0)
                   ('label label) ('device device)
@@ -135,7 +154,7 @@ record."
                   ('initrd initrd) _ ...)
      (menu-entry
       (label label)
-      (device device)
+      (device (sexp->device device))
       (device-mount-point mount-point)
       (linux linux)
       (linux-arguments linux-arguments)
@@ -148,7 +167,7 @@ record."
                   ('multiboot-modules multiboot-modules) _ ...)
      (menu-entry
       (label label)
-      (device device)
+      (device (sexp->device device))
       (device-mount-point mount-point)
       (multiboot-kernel multiboot-kernel)
       (multiboot-arguments multiboot-arguments)
@@ -193,29 +212,33 @@ instead~%")))
 (define-record-type* <bootloader-configuration>
   bootloader-configuration make-bootloader-configuration
   bootloader-configuration?
-  (bootloader         bootloader-configuration-bootloader) ;<bootloader>
-  (targets            %bootloader-configuration-targets    ;list of strings
-                      (default #f))
-  (target             %bootloader-configuration-target ;deprecated
-                      (default #f) (sanitize warn-target-field-deprecation))
-  (menu-entries       bootloader-configuration-menu-entries ;list of <menu-entry>
-                      (default '()))
-  (default-entry      bootloader-configuration-default-entry ;integer
-                      (default 0))
-  (timeout            bootloader-configuration-timeout ;seconds as integer
-                      (default 5))
-  (keyboard-layout    bootloader-configuration-keyboard-layout ;<keyboard-layout> | #f
-                      (default #f))
-  (theme              bootloader-configuration-theme ;bootloader-specific theme
-                      (default #f))
-  (terminal-outputs   bootloader-configuration-terminal-outputs ;list of symbols
-                      (default '(gfxterm)))
-  (terminal-inputs    bootloader-configuration-terminal-inputs ;list of symbols
-                      (default '()))
-  (serial-unit        bootloader-configuration-serial-unit ;integer | #f
-                      (default #f))
-  (serial-speed       bootloader-configuration-serial-speed ;integer | #f
-                      (default #f)))
+  (bootloader
+   bootloader-configuration-bootloader) ;<bootloader>
+  (targets               %bootloader-configuration-targets
+                         (default #f))     ;list of strings
+  (target                %bootloader-configuration-target ;deprecated
+                         (default #f)
+                         (sanitize warn-target-field-deprecation))
+  (menu-entries          bootloader-configuration-menu-entries
+                         (default '()))   ;list of <menu-entry>
+  (default-entry         bootloader-configuration-default-entry
+                         (default 0))     ;integer
+  (timeout               bootloader-configuration-timeout
+                         (default 5))     ;seconds as integer
+  (keyboard-layout       bootloader-configuration-keyboard-layout
+                         (default #f))    ;<keyboard-layout> | #f
+  (theme                 bootloader-configuration-theme
+                         (default #f))    ;bootloader-specific theme
+  (terminal-outputs      bootloader-configuration-terminal-outputs
+                         (default '(gfxterm)))   ;list of symbols
+  (terminal-inputs       bootloader-configuration-terminal-inputs
+                         (default '()))   ;list of symbols
+  (serial-unit           bootloader-configuration-serial-unit
+                         (default #f))    ;integer | #f
+  (serial-speed          bootloader-configuration-serial-speed
+                         (default #f))    ;integer | #f
+  (device-tree-support?  bootloader-configuration-device-tree-support?
+                         (default #t)))   ;boolean
 
 (define-deprecated (bootloader-configuration-target config)
   bootloader-configuration-targets
diff --git a/gnu/bootloader/extlinux.scm b/gnu/bootloader/extlinux.scm
index 6b5ff298e7..d9b6d8bf8a 100644
--- a/gnu/bootloader/extlinux.scm
+++ b/gnu/bootloader/extlinux.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2017 David Craven <david@craven.ch>
 ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
+;;; Copyright © 2022 Reza Alizadeh Majd <r.majd@pantherx.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -38,6 +39,9 @@ corresponding to old generations of the system."
   (define all-entries
     (append entries (bootloader-configuration-menu-entries config)))
 
+  (define with-fdtdir?
+    (bootloader-configuration-device-tree-support? config))
+
   (define (menu-entry->gexp entry)
     (let ((label (menu-entry-label entry))
           (kernel (menu-entry-linux entry))
@@ -46,12 +50,16 @@ corresponding to old generations of the system."
       #~(format port "LABEL ~a
   MENU LABEL ~a
   KERNEL ~a
-  FDTDIR ~a/lib/dtbs
+  ~a
   INITRD ~a
   APPEND ~a
 ~%"
                 #$label #$label
-                #$kernel (dirname #$kernel) #$initrd
+                #$kernel
+                (if #$with-fdtdir?
+                    (string-append "FDTDIR " (dirname #$kernel) "/lib/dtbs")
+                    "")
+                #$initrd
                 (string-join (list #$@kernel-arguments)))))
 
   (define builder
diff --git a/gnu/build/marionette.scm b/gnu/build/marionette.scm
index 4f409166db..06b699bd7b 100644
--- a/gnu/build/marionette.scm
+++ b/gnu/build/marionette.scm
@@ -1,6 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2016-2022 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2018 Chris Marusich <cmmarusich@gmail.com>
+;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -267,39 +268,50 @@ Monitor\")."
      ;; The "quit" command terminates QEMU immediately, with no output.
      (unless (string=? command "quit") (wait-for-monitor-prompt monitor)))))
 
-(define* (marionette-screen-text marionette
-                                 #:key
-                                 (ocrad "ocrad"))
-  "Take a screenshot of MARIONETTE, perform optical character
-recognition (OCR), and return the text read from the screen as a string.  Do
-this by invoking OCRAD (file name for GNU Ocrad's command)"
-  (define (random-file-name)
-    (string-append "/tmp/marionette-screenshot-"
-                   (number->string (random (expt 2 32)) 16)
-                   ".ppm"))
-
-  (let ((image (random-file-name)))
+(define* (invoke-ocrad-ocr image #:key (ocrad "ocrad"))
+  "Invoke the OCRAD command on image, and return the recognized text."
+  (let* ((pipe (open-pipe* OPEN_READ ocrad "-i" "-s" "10" image))
+         (text (get-string-all pipe)))
+    (unless (zero? (close-pipe pipe))
+      (error "'ocrad' failed" ocrad))
+    text))
+
+(define* (invoke-tesseract-ocr image #:key (tesseract "tesseract"))
+  "Invoke the TESSERACT command on IMAGE, and return the recognized text."
+  (let* ((output-basename (tmpnam))
+         (output-basename* (string-append output-basename ".txt")))
     (dynamic-wind
       (const #t)
       (lambda ()
-        (marionette-control (string-append "screendump " image)
-                            marionette)
-
-        ;; Tell Ocrad to invert the image colors (make it black on white) and
-        ;; to scale the image up, which significantly improves the quality of
-        ;; the result.  In spite of this, be aware that OCR confuses "y" and
-        ;; "V" and sometimes erroneously introduces white space.
-        (let* ((pipe (open-pipe* OPEN_READ ocrad
-                                 "-i" "-s" "10" image))
-               (text (get-string-all pipe)))
-          (unless (zero? (close-pipe pipe))
-            (error "'ocrad' failed" ocrad))
-          text))
+        (let ((exit-val (status:exit-val
+                         (system* tesseract image output-basename))))
+          (unless (zero? exit-val)
+            (error "'tesseract' failed" tesseract))
+          (call-with-input-file output-basename* get-string-all)))
       (lambda ()
-        (false-if-exception (delete-file image))))))
+        (false-if-exception (delete-file output-basename))
+        (false-if-exception (delete-file output-basename*))))))
+
+(define* (marionette-screen-text marionette #:key (ocr "ocrad"))
+  "Take a screenshot of MARIONETTE, perform optical character
+recognition (OCR), and return the text read from the screen as a string.  Do
+this by invoking OCR, which should be the file name of GNU Ocrad's
+@command{ocrad} or Tesseract OCR's @command{tesseract} command."
+  (define image (string-append (tmpnam) ".ppm"))
+  ;; Use the QEMU Monitor to save an image of the screen to the host.
+  (marionette-control (string-append "screendump " image) marionette)
+  ;; Process it via the OCR.
+  (cond
+   ((string-contains ocr "ocrad")
+    (invoke-ocrad-ocr image #:ocrad ocr))
+   ((string-contains ocr "tesseract")
+    (invoke-tesseract-ocr image #:tesseract ocr))
+   (else (error "unsupported ocr command"))))
 
 (define* (wait-for-screen-text marionette predicate
-                               #:key (timeout 30) (ocrad "ocrad"))
+                               #:key
+                               (ocr "ocrad")
+                               (timeout 30))
   "Wait for TIMEOUT seconds or until the screen text on MARIONETTE matches
 PREDICATE, whichever comes first.  Raise an error when TIMEOUT is exceeded."
   (define start
@@ -308,13 +320,14 @@ PREDICATE, whichever comes first.  Raise an error when TIMEOUT is exceeded."
   (define end
     (+ start timeout))
 
-  (let loop ()
+  (let loop ((last-text #f))
     (if (> (car (gettimeofday)) end)
-        (error "'wait-for-screen-text' timeout" predicate)
-        (or (predicate (marionette-screen-text marionette #:ocrad ocrad))
-            (begin
-              (sleep 1)
-              (loop))))))
+        (error "'wait-for-screen-text' timeout" 'ocr-text: last-text)
+        (let ((text (marionette-screen-text marionette #:ocr ocr)))
+          (or (predicate text)
+              (begin
+                (sleep 1)
+                (loop text)))))))
 
 (define %qwerty-us-keystrokes
   ;; Maps "special" characters to their keystrokes.
diff --git a/gnu/local.mk b/gnu/local.mk
index c433cf7d98..bb410b97af 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -51,6 +51,7 @@
 # Copyright © 2022 Remco van 't Veer <remco@remworks.net>
 # Copyright © 2022 Artyom V. Poptsov <poptsov.artyom@gmail.com>
 # Copyright © 2022 John Kehayias <john.kehayias@protonmail.com>
+# Copyright © 2022 muradm <mail@muradm.net>
 #
 # This file is part of GNU Guix.
 #
@@ -660,6 +661,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/services/guix.scm			\
   %D%/services/hurd.scm				\
   %D%/services/kerberos.scm			\
+  %D%/services/lightdm.scm      		\
   %D%/services/linux.scm			\
   %D%/services/lirc.scm				\
   %D%/services/virtualization.scm		\
@@ -672,6 +674,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/services/nfs.scm			\
   %D%/services/pam-mount.scm			\
   %D%/services/science.scm			\
+  %D%/services/security.scm			\
   %D%/services/security-token.scm		\
   %D%/services/shepherd.scm			\
   %D%/services/sound.scm			\
@@ -756,6 +759,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/tests/package-management.scm		\
   %D%/tests/reconfigure.scm			\
   %D%/tests/rsync.scm				\
+  %D%/tests/security.scm			\
   %D%/tests/security-token.scm			\
   %D%/tests/singularity.scm			\
   %D%/tests/ssh.scm				\
@@ -840,6 +844,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/abseil-cpp-fix-strerror_test.patch	\
   %D%/packages/patches/adb-add-libraries.patch			\
   %D%/packages/patches/adb-libssl_11-compatibility.patch	\
+  %D%/packages/patches/accountsservice-extensions.patch		\
   %D%/packages/patches/aegis-constness-error.patch         	\
   %D%/packages/patches/aegis-perl-tempdir1.patch           	\
   %D%/packages/patches/aegis-perl-tempdir2.patch           	\
@@ -1354,6 +1359,9 @@ dist_patch_DATA =						\
   %D%/packages/patches/librime-fix-build-with-gcc10.patch	\
   %D%/packages/patches/libvirt-add-install-prefix.patch	\
   %D%/packages/patches/libziparchive-add-includes.patch		\
+  %D%/packages/patches/lightdm-arguments-ordering.patch		\
+  %D%/packages/patches/lightdm-vncserver-check.patch		\
+  %D%/packages/patches/lightdm-vnc-color-depth.patch		\
   %D%/packages/patches/localed-xorg-keyboard.patch		\
   %D%/packages/patches/kdiagram-Fix-missing-link-libraries.patch \
   %D%/packages/patches/kiki-level-selection-crash.patch		\
@@ -1500,7 +1508,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/libmemcached-build-with-gcc7.patch	\
   %D%/packages/patches/libmhash-hmac-fix-uaf.patch		\
   %D%/packages/patches/libsigrokdecode-python3.9-fix.patch	\
-  %D%/packages/patches/mercurial-hg-extension-path.patch       \
+  %D%/packages/patches/mercurial-hg-extension-path.patch	\
+  %D%/packages/patches/mercurial-openssl-compat.patch		\
   %D%/packages/patches/mesa-opencl-all-targets.patch		\
   %D%/packages/patches/mesa-skip-tests.patch			\
   %D%/packages/patches/meson-allow-dirs-outside-of-prefix.patch	\
diff --git a/gnu/packages/animation.scm b/gnu/packages/animation.scm
index b8524681fa..a1932b5f06 100644
--- a/gnu/packages/animation.scm
+++ b/gnu/packages/animation.scm
@@ -3,6 +3,7 @@
 ;;; Copyright © 2018–2021 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2019 Pkill -9 <pkill9@runbox.com>
 ;;; Copyright © 2020, 2021, 2022 Vinicius Monego <monego@posteo.net>
+;;; Copyright © 2022 Tomasz Jeneralczyk <tj@schwi.pl>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -47,6 +48,7 @@
   #:use-module (gnu packages image)
   #:use-module (gnu packages imagemagick)
   #:use-module (gnu packages jemalloc)
+  #:use-module (gnu packages mp3)
   #:use-module (gnu packages networking)
   #:use-module (gnu packages pcre)
   #:use-module (gnu packages perl)
@@ -495,3 +497,100 @@ waveform until they line up with the proper sounds.")
 lets you create traditional hand-drawn animations (cartoons) using both bitmap
 and vector graphics.")
     (license license:gpl2)))
+
+(define-public swftools
+  ;; Last release of swftools was 0.9.2 on 2012-04-21 - it is really old and
+  ;; does not compile with what's available in guix, master on the other hand works.
+  (let ((commit "772e55a271f66818b06c6e8c9b839befa51248f4")
+        (revision "1"))
+    (package
+      (name "swftools")
+      (version (git-version "0.9.2" revision commit))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/matthiaskramm/swftools")
+               (commit commit)))
+         (sha256
+                 (base32 "0a8a29rn7gpxnba3spnvkpdgr7mdlssvr273mzw5b2wjvbzard3w"))
+         (file-name (git-file-name name version))
+         (modules '((guix build utils)))
+         (snippet
+          '(begin
+             ;; XXX: Swftools includes the source tarball of an old version of
+             ;; xpdf.
+
+             ;; To fix a linking error I followed the workaround in:
+             ;; https://github.com/matthiaskramm/swftools/issues/178
+             ;; and implented it as a two-step snippet because substitute*
+             ;; does not match multiline regexes.
+             (substitute* "lib/lame/quantize.c"
+               ;; move inline keywords to the same line as their function headers
+               (("^inline.*\n") "inline "))
+             (substitute* "lib/lame/quantize.c"
+               ;; make this particular function not inline
+               (("inline (void bitpressure_strategy1)" _ f) f))))))
+      (build-system gnu-build-system)
+      (arguments
+       (list #:tests? #f)) ; no rule for check
+      (inputs (list zlib freetype giflib libjpeg-turbo lame))
+      (home-page "http://www.swftools.org")
+      (synopsis "Collection of utilities for working with Adobe Flash files")
+
+      ;; XXX: This package will built all of swftools' tools but one: PDF2SWF,
+      ;; purposefuly commented out of the description below.
+      (description "SWFTools is a collection of utilities for working with
+Adobe Flash files (SWF files).  The tool collection includes programs for
+reading SWF files, combining them, and creating them from other content (like
+images, sound files, videos or sourcecode).  The current collection is
+ comprised of the programs detailed below:
+
+@itemize
+@comment PDF2SWF is not currentlybeing  build alongside other tools.  The next
+@comment two lines should be uncommented if this will ever get fixed.
+@comment @item
+@comment @command{pdf2swf} A PDF to SWF Converter.
+
+@item
+@command{swfcombine} A multi-function tool for inserting, contatenating,
+stacking and changing parameters in SWFs.
+
+@item
+@command{swfstrings} Scans SWFs for text data.
+@item
+@command{swfdump} Prints out various informations about SWFs.
+
+@item
+@command{jpeg2swf} Takes one or more JPEG pictures and generates a SWF
+slideshow from them.
+
+@item
+@command{png2swf} Like JPEG2SWF, only for PNGs.
+
+@item
+@command{gif2swf} Converts GIFs to SWF.  Also able to handle animated GIFs.
+
+@item
+@command{wav2swf} Converts WAV audio files to SWFs, using the LAME MP3
+ encoder library.
+
+@item
+@command{font2swf} Converts font files (TTF, Type1) to SWF.
+
+@item
+@command{swfbbox} Allows to read out, optimize and readjust SWF bounding boxes.
+
+@item
+@command{swfc} A tool for creating SWF files from simple script files.  Supports
+both ActionScript 2.0 aand 3.0.
+
+@item
+@command{swfextract} Allows to extract Movieclips, Sounds, Images etc. from SWF
+ files.
+
+@item
+@command{as3compile} A standalone ActionScript 3.0 compiler.  Mostly compatible
+ with Flex.
+@end itemize")
+      (license license:gpl2+))))
diff --git a/gnu/packages/bioconductor.scm b/gnu/packages/bioconductor.scm
index 7aee0c55c3..2a3776e8b5 100644
--- a/gnu/packages/bioconductor.scm
+++ b/gnu/packages/bioconductor.scm
@@ -4647,14 +4647,14 @@ Shiny-based display methods for Bioconductor objects.")
 (define-public r-keggrest
   (package
     (name "r-keggrest")
-    (version "1.36.2")
+    (version "1.36.3")
     (source
      (origin
        (method url-fetch)
        (uri (bioconductor-uri "KEGGREST" version))
        (sha256
         (base32
-         "1rn03w8y80prbvzahkvf8275haiymnjj1ijcgn55p3d0sb54yzgw"))))
+         "0lzb3z6pzm323q70931b7220ygml7jb4g81dybwa79wqiqz15pni"))))
     (properties `((upstream-name . "KEGGREST")))
     (build-system r-build-system)
     (propagated-inputs
diff --git a/gnu/packages/code.scm b/gnu/packages/code.scm
index f4855e12e9..cc0abedd35 100644
--- a/gnu/packages/code.scm
+++ b/gnu/packages/code.scm
@@ -16,6 +16,7 @@
 ;;; Copyright © 2020 Julien Lepiller <julien@lepiller.eu>
 ;;; Copyright © 2021 lu hui <luhuins@163.com>
 ;;; Copyright © 2021, 2022 Foo Chuan Wei <chuanwei.foo@hotmail.com>
+;;; Copyright © 2022 Michael Rohleder <mike@rohleder.de>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -744,7 +745,7 @@ independent targets.")
 (define-public uncrustify
   (package
     (name "uncrustify")
-    (version "0.74.0")
+    (version "0.75.1")
     (source (origin
               (method git-fetch)
               (uri (git-reference
@@ -753,7 +754,7 @@ independent targets.")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "0v48vhmzxjzysbf0vhxzayl2pkassvbabvwg84xd6b8n5i74ijxd"))))
+                "1mzzzd4alajjdshbjd2a5mddqcpag8yyss72n09mfpialzyf7g60"))))
     (build-system cmake-build-system)
     (native-inputs
      `(("python" ,python-wrapper)))
diff --git a/gnu/packages/databases.scm b/gnu/packages/databases.scm
index 6c97dbe413..3b8d6db967 100644
--- a/gnu/packages/databases.scm
+++ b/gnu/packages/databases.scm
@@ -1153,7 +1153,7 @@ Language.")
        ("libaio" ,libaio)
        ("libxml2" ,libxml2)
        ("ncurses" ,ncurses)
-       ("openssl" ,openssl)
+       ("openssl" ,openssl-1.1)
        ("pam" ,linux-pam)
        ("pcre2" ,pcre2)
        ("xz" ,xz)
diff --git a/gnu/packages/debug.scm b/gnu/packages/debug.scm
index 80685900eb..b3ddfbdee6 100644
--- a/gnu/packages/debug.scm
+++ b/gnu/packages/debug.scm
@@ -621,7 +621,7 @@ error reporting, better tracing, profiling, and a debugger.")
 (define-public rr
   (package
     (name "rr")
-    (version "5.5.0")
+    (version "5.6.0")
     (source (origin
               (method git-fetch)
               (uri (git-reference
@@ -629,7 +629,7 @@ error reporting, better tracing, profiling, and a debugger.")
                     (commit version)))
               (sha256
                (base32
-                "079x891axkiy8qbvjar9vbaldlx7pm9p0i3nq6infdc66nc69635"))
+                "0sdpsd7bcbmx9gmp7lv71znzxz708wm8qxq5apbyc6hh80z4fzqz"))
               (file-name (git-file-name name version))))
     (build-system cmake-build-system)
     (arguments
@@ -641,7 +641,9 @@ error reporting, better tracing, profiling, and a debugger.")
              ;; Satisfy the ‘validate-runpath’ phase.  This isn't a direct
              ;; consequence of clearing CMAKE_INSTALL_RPATH.
              (string-append "-DCMAKE_EXE_LINKER_FLAGS=-Wl,-rpath="
-                            (assoc-ref %build-inputs "capnproto") "/lib")
+                            (assoc-ref %build-inputs "capnproto")
+                            "/lib,-rpath=" (assoc-ref %build-inputs "zlib")
+                            "/lib")
              ,@(if (and (not (%current-target-system))
                         (member (%current-system)
                                 '("x86_64-linux" "aarch64-linux")))
@@ -666,7 +668,7 @@ error reporting, better tracing, profiling, and a debugger.")
     (native-inputs
      (list pkg-config ninja which))
     (inputs
-     (list gdb capnproto python python-pexpect))
+     (list gdb capnproto python python-pexpect zlib))
     (home-page "https://rr-project.org/")
     (synopsis "Record and reply debugging framework")
     (description
diff --git a/gnu/packages/display-managers.scm b/gnu/packages/display-managers.scm
index cbcceba8f4..ef26890414 100644
--- a/gnu/packages/display-managers.scm
+++ b/gnu/packages/display-managers.scm
@@ -37,6 +37,7 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system qt)
   #:use-module (guix build-system gnu)
+  #:use-module (guix build-system glib-or-gtk)
   #:use-module (guix build-system trivial)
   #:use-module (guix packages)
   #:use-module (guix utils)
@@ -53,6 +54,7 @@
   #:use-module (gnu packages gnome)
   #:use-module (gnu packages gnupg)
   #:use-module (gnu packages gtk)
+  #:use-module (gnu packages guile)
   #:use-module (gnu packages image)
   #:use-module (gnu packages kde-frameworks)
   #:use-module (gnu packages linux)
@@ -275,7 +277,10 @@ experience for your users, your family and yourself")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "1wr60c946p8jz9kb8zi4cd8d4mkcy7infbvlfzwajiglc22nblxn"))))
+                "1wr60c946p8jz9kb8zi4cd8d4mkcy7infbvlfzwajiglc22nblxn"))
+              (patches (search-patches "lightdm-arguments-ordering.patch"
+                                       "lightdm-vncserver-check.patch"
+                                       "lightdm-vnc-color-depth.patch"))))
     (build-system gnu-build-system)
     (arguments
      '(#:parallel-tests? #f             ; fails when run in parallel
@@ -310,8 +315,8 @@ experience for your users, your family and yourself")
              (unsetenv "LC_ALL"))))))
     (inputs
      (list audit
-           bash-minimal                           ;for cross-compilation
-           coreutils-minimal                      ;ditto
+           bash-minimal                 ;for cross-compilation
+           coreutils-minimal            ;ditto
            linux-pam
            shadow                       ;for sbin/nologin
            libgcrypt
@@ -356,17 +361,29 @@ display manager which supports different greeters.")
               (sha256
                (base32
                 "04q62mvr97l9gv8h37hfarygqc7p0498ig7xclcg4kxkqw0b7yxy"))))
-    (build-system gnu-build-system)
+    (build-system glib-or-gtk-build-system)
     (arguments
      (list
       #:configure-flags
       #~(list "--disable-indicator-services-command" ;requires upstart
+              ;; Put the binary under /bin rather than /sbin, so that it gets
+              ;; wrapped by the glib-or-gtk-wrap phase.
+              (string-append "--sbindir=" #$output "/bin")
+              (string-append "--with-libxklavier")
               (string-append "--enable-at-spi-command="
                              (search-input-file
-                              %build-inputs "libexec/at-spi-bus-launcher")))
-
+                              %build-inputs "libexec/at-spi-bus-launcher")
+                             " --launch-immediately"))
       #:phases
       #~(modify-phases %standard-phases
+          (add-after 'unpack 'customize-default-config-path
+            (lambda _
+              (substitute* "src/Makefile.in"
+                ;; Have the default config directory sourced from
+                ;; /etc/lightdm/lightdm-gtk-greeter.conf, which is where the
+                ;; lightdm service writes it.
+                (("\\$\\(sysconfdir)/lightdm/lightdm-gtk-greeter.conf")
+                 "/etc/lightdm/lightdm-gtk-greeter.conf"))))
           (add-after 'install 'fix-.desktop-file
             (lambda* (#:key outputs #:allow-other-keys)
               (substitute* (search-input-file
@@ -375,34 +392,38 @@ display manager which supports different greeters.")
                 (("Exec=lightdm-gtk-greeter")
                  (string-append "Exec="
                                 (search-input-file
-                                 outputs "sbin/lightdm-gtk-greeter"))))))
-          (add-after 'fix-.desktop-file 'wrap-program
-            ;; Mimic glib-or-gtk build system which doesn't wrap files in
-            ;; /sbin.
-            (lambda* (#:key outputs inputs #:allow-other-keys)
-              (let ((gtk #$(this-package-input "gtk+"))
-                    (shared-mime-info #$(this-package-input "shared-mime-info"))
-                    (glib #$(this-package-input "glib")))
-                (wrap-program (search-input-file
-                               outputs "sbin/lightdm-gtk-greeter")
-                  `("XDG_DATA_DIRS" ":" prefix
-                    ,(cons "/run/current-system/profile/share"
-                           (map (lambda (pkg)
-                                  (string-append pkg "/share"))
-                                (list gtk shared-mime-info glib))))
-                  `("GTK_PATH" ":" prefix (,gtk))
-                  `("GIO_EXTRA_MODULES" ":" prefix (,gtk))
-                  '("XCURSOR_PATH" ":" prefix
-                    ("/run/current-system/profile/share/icons")))))))))
+                                 outputs "bin/lightdm-gtk-greeter"))))))
+          (add-after 'glib-or-gtk-wrap 'custom-wrap
+            (lambda* (#:key outputs #:allow-other-keys)
+              (wrap-script (search-input-file
+                            outputs "bin/lightdm-gtk-greeter")
+                ;; Wrap GDK_PIXBUF_MODULE_FILE, so that the SVG loader is
+                ;; available at all times even outside of profiles, such as
+                ;; when used in the lightdm-service-type.  Otherwise, it
+                ;; wouldn't be able to display its own icons.
+                `("GDK_PIXBUF_MODULE_FILE" =
+                  (,(search-input-file
+                     outputs
+                     "lib/gdk-pixbuf-2.0/2.10.0/loaders.cache")))
+                `("XDG_DATA_DIRS" ":" prefix
+                  (,(string-append "/run/current-system/profile/share:"
+                                   (getenv "XDG_DATA_DIRS"))))
+                '("XCURSOR_PATH" ":" prefix
+                  ("/run/current-system/profile/share/icons"))))))))
     (native-inputs
-     (list exo intltool pkg-config xfce4-dev-tools))
+     (list exo
+           intltool
+           pkg-config
+           xfce4-dev-tools))
     (inputs
-     (list bash-minimal                 ;for wrap-program
+     (list at-spi2-core
+           bash-minimal                 ;for wrap-program
+           gtk+
+           guile-3.0
+           librsvg
+           libxklavier
            lightdm
-           shared-mime-info
-           at-spi2-core
-           glib
-           gtk+))
+           shared-mime-info))
     (synopsis "GTK+ greeter for LightDM")
     (home-page "https://github.com/xubuntu/lightdm-gtk-greeter")
     (description "This package provides a LightDM greeter implementation using
diff --git a/gnu/packages/django.scm b/gnu/packages/django.scm
index 0eb9ccf0f3..091d619a41 100644
--- a/gnu/packages/django.scm
+++ b/gnu/packages/django.scm
@@ -1361,3 +1361,54 @@ Django's filtering system in ORM).")
 models that use Django's standard @code{ImageField}, in addition to the
 image files already supported by it.")
     (license license:expat)))
+
+(define-public python-django-cleanup
+  (package
+    (name "python-django-cleanup")
+    (version "6.0.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/un1t/django-cleanup")
+             (commit (string-append version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0c1nghn1bnlq0a4d3sy3s363ksqsnxksixbimdy3cc6a0vk4sjps"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-tests-settings
+           (lambda* (#:key inputs #:allow-other-keys)
+             ;; django-cleanup optionally integrates with
+             ;; sorl-thumbnail, which is not available in Guix yet, so
+             ;; this patch comments it out to avoid import failures in
+             ;; test settings.
+             (substitute* "django_cleanup/testapp/settings.py"
+               (("'sorl\\.thumbnail',") "# 'sorl.thumbnail',"))))
+         (replace 'check
+           (lambda* (#:key tests? inputs outputs #:allow-other-keys)
+             (when tests?
+               (add-installed-pythonpath inputs outputs)
+               ;; Add CWD to PYTHONPATH so that the tests can find the
+               ;; testapp package in the source.
+               (setenv "PYTHONPATH" (getcwd))
+               (invoke "pytest")))))))
+    (native-inputs
+     (list ;; python-django-sorl-thumbnail  ; TODO: Add to Guix.
+           python-easy-thumbnails
+           python-pillow
+           python-pytest
+           python-pytest-cov
+           python-pytest-django
+           python-pytest-xdist))
+    (propagated-inputs
+     (list python-django))
+    (home-page "https://github.com/un1t/django-cleanup")
+    (synopsis "Automatically deletes unused media files")
+    (description "This application automatically deletes user-uploaded
+files when a model is modified or deleted.  It works for FileField,
+ImageField and their subclasses.  Files set as default values for any
+FileField are not deleted.")
+    (license license:expat)))
diff --git a/gnu/packages/emacs-xyz.scm b/gnu/packages/emacs-xyz.scm
index c35912a26b..90ee485f1e 100644
--- a/gnu/packages/emacs-xyz.scm
+++ b/gnu/packages/emacs-xyz.scm
@@ -19836,8 +19836,8 @@ never confused by comments or @code{foo-bar} matching @code{foo}.")
 (define-public emacs-crdt
   ;; XXX: Upstream does not always tag new releases.  The commit below
   ;; corresponds exactly to latest version bump.
-  (let ((commit "2feb88ea9a2589946014878790af585cad9f28fc")
-        (version "0.3.2"))
+  (let ((commit "480f60fdda9e40848920fa460b59dfba23fa06e5")
+        (version "0.3.3"))
     (package
       (name "emacs-crdt")
       (version version)
@@ -19849,7 +19849,7 @@ never confused by comments or @code{foo-bar} matching @code{foo}.")
                (commit commit)))
          (file-name (git-file-name name version))
          (sha256
-          (base32 "1fc98kl5qm7h5hrd70g61zzbdinnbf0zvk9rghf6w78ndp6lv7fz"))))
+          (base32 "10hb2xwv8ylkm4cla2q5l11r1m1s1j4ywiwvy9x5884gxvbpbbph"))))
       (build-system emacs-build-system)
       (home-page "https://code.librehq.com/qhong/crdt.el")
       (synopsis "Real-time collaborative editing environment")
diff --git a/gnu/packages/freedesktop.scm b/gnu/packages/freedesktop.scm
index 8546554c53..4c5c86b8f7 100644
--- a/gnu/packages/freedesktop.scm
+++ b/gnu/packages/freedesktop.scm
@@ -27,7 +27,7 @@
 ;;; Copyright © 2021 Robby Zambito <contact@robbyzambito.me>
 ;;; Copyright © 2021, 2022 Maxime Devos <maximedevos@telenet.be>
 ;;; Copyright © 2021 John Kehayias <john.kehayias@protonmail.com>
-;;; Copyright © 2021, 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;; Copyright © 2021, 2021, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2022 Daniel Meißner <daniel.meissner-i4k@ruhr-uni-bochum.de>
 ;;; Copyright © 2022 muradm <mail@muradm.net>
 ;;;
@@ -1074,8 +1074,11 @@ fullscreen) or other display servers.")
     (build-system meson-build-system)
     (inputs
      (list wayland))
-    (native-inputs
-     (list pkg-config python))
+    (native-inputs (cons* pkg-config python
+                          (if (%current-target-system)
+                              (list pkg-config-for-build
+                                    wayland) ; for wayland-scanner
+                              '())))
     (synopsis "Wayland protocols")
     (description "Wayland-Protocols contains Wayland protocols that add
 functionality not available in the Wayland core protocol.  Such protocols either
@@ -1435,7 +1438,7 @@ message bus.")
 (define-public accountsservice
   (package
     (name "accountsservice")
-    (version "0.6.55")
+    (version "22.08.8")
     (source
      (origin
        (method url-fetch)
@@ -1443,45 +1446,75 @@ message bus.")
                            "accountsservice/accountsservice-"
                            version ".tar.xz"))
        (sha256
-        (base32 "16wwd633jak9ajyr1f1h047rmd09fhf3kzjz6g5xjsz0lwcj8azz"))))
+        (base32 "14d3lwik048h62qrzg1djdd2sqmxf3m1r859730pvzhrd6krg6ch"))
+       (patches (search-patches "accountsservice-extensions.patch"))))
     (build-system meson-build-system)
     (arguments
-     `(#:tests? #f ; XXX: tests require DocBook 4.1.2
-       #:configure-flags
+     `(#:configure-flags
        '("--localstatedir=/var"
-         "-Dsystemdsystemunitdir=/tmp/empty"
-         "-Dsystemd=false"
-         "-Delogind=true")
+         "-Delogind=true"
+         "-Ddocbook=true"
+         "-Dgtk_doc=true"
+         "-Dsystemdsystemunitdir=/tmp/empty")
        #:phases
        (modify-phases %standard-phases
-         (add-after 'unpack 'patch-/bin/cat
-           (lambda _
-             (substitute* "src/user.c"
-               (("/bin/cat") (which "cat")))))
-         (add-before
-          'configure 'pre-configure
-          (lambda* (#:key inputs #:allow-other-keys)
-            (substitute* "meson_post_install.py"
-              (("in dst_dirs") "in []"))
-            (let ((shadow (assoc-ref inputs "shadow")))
-              (substitute* '("src/user.c" "src/daemon.c")
-                (("/usr/sbin/usermod")
-                 (string-append shadow "/sbin/usermod"))
-                (("/usr/sbin/useradd")
-                 (string-append shadow "/sbin/useradd"))
-                (("/usr/sbin/userdel")
-                 (string-append shadow "/sbin/userdel"))
-                (("/usr/bin/passwd")
-                 (string-append shadow "/bin/passwd"))
-                (("/usr/bin/chage")
-                 (string-append shadow "/bin/chage")))))))))
+         (add-after 'unpack 'patch-docbook-references
+           ;; Having XML_CATALOG_FILES set is not enough; xmlto does not seem
+           ;; to honor it.
+           (lambda* (#:key inputs #:allow-other-keys)
+             (substitute* (find-files "." "\\.xml(\\.in)?$")
+               (("http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd")
+                (search-input-file inputs "share/xml/dbus-1/introspect.dtd"))
+               (("http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd")
+                (search-input-file inputs "xml/dtd/docbook/docbookx.dtd")))))
+         (add-after 'unpack 'patch-paths
+           (lambda* (#:key inputs #:allow-other-keys)
+             (substitute* "meson_post_install.py"
+               (("in dst_dirs") "in []"))
+             (substitute* '("src/user.c" "src/daemon.c")
+               (("/bin/cat")
+                (search-input-file inputs "bin/cat"))
+               (("/usr/sbin/usermod")
+                (search-input-file inputs "sbin/usermod"))
+               (("/usr/sbin/useradd")
+                (search-input-file inputs "sbin/useradd"))
+               (("/usr/sbin/userdel")
+                (search-input-file inputs "sbin/userdel"))
+               (("/usr/bin/passwd")
+                (search-input-file inputs "bin/passwd"))
+               (("/usr/bin/chage")
+                (search-input-file inputs "bin/chage")))))
+         (add-after 'install 'wrap-with-xdg-data-dirs
+           ;; This is to allow accountsservice finding extensions, which
+           ;; should be installed to the system profile.
+           (lambda* (#:key outputs #:allow-other-keys)
+             (wrap-program (search-input-file outputs "libexec/accounts-daemon")
+               '("XDG_DATA_DIRS" prefix
+                 ("/run/current-system/profile/share"))))))))
     (native-inputs
-     `(("glib:bin" ,glib "bin") ; for gdbus-codegen, etc.
-       ("gobject-introspection" ,gobject-introspection)
-       ("intltool" ,intltool)
-       ("pkg-config" ,pkg-config)))
+     (list docbook-xml-4.1.2
+           docbook-xsl
+           gettext-minimal
+           `(,glib "bin")               ; for gdbus-codegen, etc.
+           gobject-introspection
+           gtk-doc
+           libxml2                      ;for XML_CATALOG_FILES
+           libxslt
+           pkg-config
+           vala
+           xmlto
+
+           ;; For the tests.
+           python
+           python-dbusmock
+           python-pygobject))
     (inputs
-     (list dbus elogind polkit shadow))
+     (list coreutils-minimal
+           dbus
+           elogind
+           shadow))
+    (propagated-inputs
+     (list polkit))                     ; listed in Requires.private
     (home-page "https://www.freedesktop.org/wiki/Software/AccountsService/")
     (synopsis "D-Bus interface for user account query and manipulation")
     (description
diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index aa2e4e04b0..2b540ee59b 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -7622,148 +7622,6 @@ entirely config file, savegame, netplay and demo compatible with the
 original.")
     (home-page "https://www.chocolate-doom.org/wiki/index.php/Crispy_Doom")))
 
-(define shlomif-cmake-modules
-  (origin
-    (method url-fetch)
-    (uri (string-append
-          "https://raw.githubusercontent.com/shlomif/shlomif-cmake-modules/"
-          "89f05caf86078f783873975525230cf4fecede8a"
-          "/shlomif-cmake-modules/Shlomif_Common.cmake"))
-    (sha256
-     (base32 "05xdikw5ln0yh8p5chsmd8qnndmxg5b5vjlfpdqrjcb1ncqzywkc"))))
-
-(define-public rinutils
-  (package
-    (name "rinutils")
-    (version "0.10.1")
-    (source (origin
-              (method git-fetch)
-              (uri (git-reference
-                    (url "https://github.com/shlomif/rinutils")
-                    (commit version)))
-              (file-name (git-file-name name version))
-              (sha256
-               (base32
-                "0r90kncf6mvyklifpdsnm50iya7w2951nz35nlgndmqnr82gvdwf"))))
-    (build-system cmake-build-system)
-    (arguments
-     (list #:phases
-           #~(modify-phases %standard-phases
-               (add-after 'unpack 'copy-cmake-modules
-                 (lambda _
-                   (copy-file #$shlomif-cmake-modules
-                              (string-append "cmake/"
-                                             (strip-store-file-name
-                                              #$shlomif-cmake-modules)))))
-               (replace 'check
-                 (lambda* (#:key tests? #:allow-other-keys)
-                   (when tests?
-                     (with-directory-excursion "../source"
-                       (setenv "FCS_TEST_BUILD" "1")
-                       (setenv "RINUTILS_TEST_BUILD" "1")
-                       ;; TODO: Run tests after setting RINUTILS_TEST_TIDY to `1',
-                       ;; which requires tidy-all.
-                       ;; (setenv "RINUTILS_TEST_TIDY" "1")
-                       (invoke "perl"
-                               "CI-testing/continuous-integration-testing.pl"))))))))
-    (native-inputs
-     (list perl
-           ;; The following are needed only for tests.
-           perl-class-xsaccessor
-           perl-file-find-object
-           perl-io-all
-           perl-test-differences
-           perl-test-runvalgrind
-           pkg-config))
-    (inputs
-     (list cmocka
-           perl-env-path
-           perl-inline
-           perl-inline-c
-           perl-string-shellquote
-           perl-test-trailingspace
-           perl-file-find-object-rule
-           perl-text-glob
-           perl-number-compare
-           perl-moo))
-    (home-page "https://www.shlomifish.org/open-source/projects/")
-    (synopsis "C11 / gnu11 utilities C library")
-    (description "This package provides C11 / gnu11 utilities C library")
-    (license license:expat)))
-
-(define-public fortune-mod
-  (package
-    (name "fortune-mod")
-    (version "3.14.0")
-    (source
-     (origin
-       (method git-fetch)
-       (uri (git-reference
-             (url "https://github.com/shlomif/fortune-mod")
-             (commit (string-append "fortune-mod-" version))))
-       (file-name (git-file-name name version))
-       (sha256
-        (base32 "1f2zif3s6vddbhph4jr1cymdsn7gagg59grrxs0yap6myqmy8shg"))))
-    (build-system cmake-build-system)
-    (arguments
-     (list #:configure-flags
-           #~(let ((fortunes (string-append #$output "/share/fortunes")))
-               (list (string-append "-DLOCALDIR=" fortunes)
-                     (string-append "-DLOCALODIR=" fortunes "/off")
-                     (string-append "-DCOOKIEDIR=" fortunes)
-                     (string-append "-DOCOOKIEDIR=" fortunes "/off")))
-           #:test-target "check"
-           #:phases
-           #~(modify-phases %standard-phases
-               (add-after 'unpack 'enter-build-directory
-                 (lambda _
-                   (chdir "fortune-mod")))
-               (add-after 'enter-build-directory 'symlink-rinutils
-                 (lambda _
-                   (mkdir-p "rinutils")
-                   (symlink #$(this-package-native-input "rinutils")
-                            "rinutils/rinutils")))
-               (add-after 'enter-build-directory 'copy-cmake-modules
-                 (lambda _
-                   (copy-file #$shlomif-cmake-modules
-                              (string-append "cmake/"
-                                             (strip-store-file-name
-                                              #$shlomif-cmake-modules)))))
-               (add-after 'enter-build-directory 'delete-failing-test
-                 (lambda _
-                   ;; TODO: Valgrind tests fail for some reason.  Similar issue?
-                   ;; https://github.com/shlomif/fortune-mod/issues/21
-                   (delete-file "tests/data/valgrind.t")
-                   (with-output-to-file "tests/scripts/split-valgrind.pl"
-                     (const #t))))
-               (add-after 'install 'fix-install-directory
-                 ;; Move fortune from "games/" to "bin/" and remove the
-                 ;; former.  This is easier than patching CMakeLists.txt
-                 ;; since the tests hard-code the location as well.
-                 (lambda _
-                   (with-directory-excursion #$output
-                     (rename-file "games/fortune" "bin/fortune")
-                     (rmdir "games")))))))
-    (inputs (list recode))
-    (native-inputs
-     (list perl
-           ;; For generating the documentation.
-           docbook-xml-5
-           docbook-xsl
-           perl-app-xml-docbook-builder
-           ;; The following are only needed for tests.
-           perl-file-find-object
-           perl-test-differences
-           perl-class-xsaccessor
-           perl-io-all
-           perl-test-runvalgrind
-           rinutils))
-    (home-page "https://www.shlomifish.org/open-source/projects/fortune-mod/")
-    (synopsis "The Fortune Cookie program from BSD games")
-    (description "Fortune is a command-line utility which displays a random
-quotation from a collection of quotes.")
-    (license license:bsd-4)))
-
 (define xonotic-data
   (package
     (name "xonotic-data")
diff --git a/gnu/packages/gimp.scm b/gnu/packages/gimp.scm
index a2a991ba4c..8de98b7eba 100644
--- a/gnu/packages/gimp.scm
+++ b/gnu/packages/gimp.scm
@@ -175,7 +175,7 @@ of a larger interface.")
 (define-public babl
   (package
     (name "babl")
-    (version "0.1.92")
+    (version "0.1.96")
     (source (origin
               (method url-fetch)
               (uri (list (string-append "https://download.gimp.org/pub/babl/"
@@ -189,7 +189,7 @@ of a larger interface.")
                                         "/babl-" version ".tar.xz")))
               (sha256
                (base32
-                "1hd2i1s7fng33msxiafavk3zb4zb9jk61w8qmmsn6jwl51876rzn"))))
+                "1xj5hlmm834lb84rpjlfxbqnm5piswgzhjas4h8z90x9b7j3yrrk"))))
     (build-system meson-build-system)
     (arguments
      `(#:configure-flags
diff --git a/gnu/packages/gnupg.scm b/gnu/packages/gnupg.scm
index 90215a6877..f9f39d6116 100644
--- a/gnu/packages/gnupg.scm
+++ b/gnu/packages/gnupg.scm
@@ -288,7 +288,7 @@ compatible to GNU Pth.")
     (replacement gnupg/fixed)
     (source (origin
               (method url-fetch)
-              (uri (string-append "ftp://ftp.gnupg.org/gcrypt/gnupg/gnupg-" version
+              (uri (string-append "mirror://gnupg/gnupg/gnupg-" version
                                   ".tar.bz2"))
               (patches (search-patches "gnupg-default-pinentry.patch"))
               (sha256
diff --git a/gnu/packages/graphics.scm b/gnu/packages/graphics.scm
index 9a378e76a6..931a558e8a 100644
--- a/gnu/packages/graphics.scm
+++ b/gnu/packages/graphics.scm
@@ -2182,6 +2182,109 @@ Features include:
 ")
     (license license:gpl3+)))
 
+(define-public mmg
+  (package
+    (name "mmg")
+    (version "5.6.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/MmgTools/mmg")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "173biz5skbwg27i5w6layg7mydjzv3rmi1ywhra4rx9rjf5c0cc5"))))
+    (build-system cmake-build-system)
+    (outputs '("out" "lib" "doc"))
+    (arguments
+     (list #:configure-flags
+           #~(list (string-append "-DCMAKE_INSTALL_PREFIX=" #$output:lib)
+                   (string-append "-DCMAKE_INSTALL_RPATH=" #$output:lib "/lib")
+                   ;; The build doesn't honor -DCMAKE_INSTALL_BINDIR, hence
+                   ;; the adjust-bindir phase.
+                   ;;(string-append "-DCMAKE_INSTALL_BINDIR=" #$output "/bin")
+                   "-DBUILD_SHARED_LIBS=ON"
+                   "-DBUILD_TESTING=ON"
+                   ;; The longer tests are for continuous integration and
+                   ;; depend on input data which must be downloaded.
+                   "-DONLY_VERY_SHORT_TESTS=ON"
+                   ;; TODO: Add Elas (from
+                   ;; https://github.com/ISCDtoolbox/LinearElasticity).
+                   "-DUSE_ELAS=OFF"
+                   ;; TODO: Figure out how to add VTK to inputs without
+                   ;; causing linking errors in ASLI of the form:
+                   ;;
+                   ;;   ld: /gnu/store/…-vtk-9.0.1/lib/libvtkWrappingPythonCore-9.0.so.1:
+                   ;;     undefined reference to `PyUnicode_InternFromString'
+                   ;;
+                   ;; Also, adding VTK to inputs requires adding these as well:
+                   ;;
+                   ;;   double-conversion eigen expat freetype gl2ps glew hdf5
+                   ;;   jsoncpp libjpeg-turbo libpng libtheora libtiff libx11
+                   ;;   libxml2 lz4 netcdf proj python sqlite zlib
+                   "-DUSE_VTK=OFF")
+           #:phases
+           #~(modify-phases %standard-phases
+               (add-after 'build 'build-doc
+                 (lambda _
+                   ;; Fontconfig wants to write to a cache directory.
+                   (setenv "HOME" "/tmp")
+                   (invoke "make" "doc")))
+               (add-after 'install 'install-doc
+                 (lambda _
+                   (copy-recursively
+                    "../source/doc/man" (string-append #$output
+                                                       "/share/man/man1"))
+                   (copy-recursively
+                    "doc" (string-append #$output:doc "/share/doc/"
+                                         #$name "-" #$version))))
+               (add-after 'install 'adjust-bindir
+                 (lambda _
+                   (let ((src (string-append #$output:lib "/bin"))
+                         (dst (string-append #$output "/bin")))
+                     (copy-recursively src dst)
+                     (delete-file-recursively src))))
+               ;; Suffixing program names with build information, i.e.,
+               ;; optimization flags and whether debug symbols were generated,
+               ;; is unusual and fragilizes scripts calling these programs.
+               (add-after 'adjust-bindir 'fix-program-names
+                 (lambda _
+                   (with-directory-excursion (string-append #$output "/bin")
+                     (rename-file "mmg2d_O3d" "mmg2d")
+                     (rename-file "mmg3d_O3d" "mmg3d")
+                     (rename-file "mmgs_O3d" "mmgs")))))))
+    (native-inputs
+     ;; For the documentation
+     (list doxygen graphviz
+           ;; TODO: Fix failing LaTeX invocation (which results in equations
+           ;; being inserted literally into PNGs rather than being typeset).
+           ;;texlive-tiny
+           ))
+    (inputs
+     (list scotch))
+    (home-page "http://www.mmgtools.org/")
+    (synopsis "Surface and volume remeshers")
+    (description "Mmg is a collection of applications and libraries for
+bidimensional and tridimensional surface and volume remeshing.  It consists
+of:
+
+@itemize
+@item the @code{mmg2d} application and library: mesh generation from a set of
+edges, adaptation and optimization of a bidimensional triangulation and
+isovalue discretization;
+
+@item the @code{mmgs} application and library: adaptation and optimization of
+a surface triangulation and isovalue discretization;
+
+@item the @code{mmg3d} application and library: adaptation and optimization of
+a tetrahedral mesh, isovalue discretization and Lagrangian movement;
+
+@item the @code{mmg} library gathering the @code{mmg2d}, @code{mmgs} and
+@code{mmg3d} libraries.
+@end itemize")
+    (license license:lgpl3+)))
+
 (define-public f3d
   ;; There have been many improvements since the last tagged version (1.2.1,
   ;; released in December 2021), including support for the Alembic file
diff --git a/gnu/packages/haskell-xyz.scm b/gnu/packages/haskell-xyz.scm
index 0ce47e0902..039f4871f2 100644
--- a/gnu/packages/haskell-xyz.scm
+++ b/gnu/packages/haskell-xyz.scm
@@ -12000,9 +12000,6 @@ in the @code{IO} monad, like @code{IORef}s or parts of the OpenGL state.")
         (base32
          "0j9awbg47fzb58k5z2wgkp6a0042j7hqrl1g6lyflrbsfswdp5n4"))))
     (build-system haskell-build-system)
-    (arguments
-     '(;; Two tests fail: "Discrete CDF is OK" and "Quantile is CDF inverse".
-       #:tests? #t))
     (inputs
      (list ghc-aeson
            ghc-async
diff --git a/gnu/packages/image-processing.scm b/gnu/packages/image-processing.scm
index 3dfe086af8..0225f72651 100644
--- a/gnu/packages/image-processing.scm
+++ b/gnu/packages/image-processing.scm
@@ -20,6 +20,7 @@
 ;;; Copyright © 2021 Guillaume Le Vaillant <glv@posteo.net>
 ;;; Copyright © 2021 Ivan Gankevich <i.gankevich@spbu.ru>
 ;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;; Copyright © 2022 Tomasz Jeneralczyk <tj@schwi.pl>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -511,6 +512,9 @@ integrates with various databases on GUI toolkits such as Qt and Tk.")
              ;; DISPATCH is the list of optional dispatches.
              "-DCPU_BASELINE=SSE2"
 
+             ;; Build Python bindings.
+             "-DBUILD_opencv_python3=ON"
+
              ,@(match (%current-system)
                  ("x86_64-linux"
                   '("-DCPU_DISPATCH=NEON;VFPV3;FP16;SSE;SSE2;SSE3;SSSE3;SSE4_1;SSE4_2;POPCNT;AVX;FP16;AVX2;FMA3;AVX_512F;AVX512_SKX"
diff --git a/gnu/packages/image-viewers.scm b/gnu/packages/image-viewers.scm
index 52c9584f67..23175472ef 100644
--- a/gnu/packages/image-viewers.scm
+++ b/gnu/packages/image-viewers.scm
@@ -25,6 +25,7 @@
 ;;; Copyright © 2021 dissent <disseminatedissent@protonmail.com>
 ;;; Copyright © 2022 Michael Rohleder <mike@rohleder.de>
 ;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;; Copyright © 2022 Tomasz Jeneralczyk <tj@schwi.pl>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -55,6 +56,7 @@
   #:use-module (guix build-system qt)
   #:use-module (gnu packages autotools)
   #:use-module (gnu packages algebra)
+  #:use-module (gnu packages animation)
   #:use-module (gnu packages backup)
   #:use-module (gnu packages base)
   #:use-module (gnu packages bash)
@@ -85,14 +87,20 @@
   #:use-module (gnu packages photo)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages python)
+  #:use-module (gnu packages python-check)
+  #:use-module (gnu packages python-compression)
+  #:use-module (gnu packages python-crypto)
+  #:use-module (gnu packages python-web)
   #:use-module (gnu packages python-xyz)
   #:use-module (gnu packages qt)
   #:use-module (gnu packages suckless)
   #:use-module (gnu packages terminals)
+  #:use-module (gnu packages upnp)
   #:use-module (gnu packages version-control)
   #:use-module (gnu packages video)
   #:use-module (gnu packages web)
   #:use-module (gnu packages xdisorg)
+  #:use-module (gnu packages xml)
   #:use-module (gnu packages xorg)
   #:use-module (gnu packages))
 
@@ -973,3 +981,131 @@ synchronization of multiple instances.")
     (description
      "xzgv is a fast image viewer that provides extensive keyboard support.")
     (license license:gpl2+)))
+
+(define-public hydrus-network
+  (package
+    (name "hydrus-network")
+    (version "495")                       ;upstream has a weekly release cycle
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/hydrusnetwork/hydrus")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32
+         "03zhrcmjzbk37sl9nwjahfmr8aflss84c4xhg5ci5b8jvbbqmr1j"))
+       (modules '((guix build utils)))
+       (snippet
+        ;; Remove pre-built binaries from bin/.
+        #~(for-each delete-file (find-files "bin" "^swfrender")))))
+    (build-system python-build-system)
+    (arguments
+     (list
+      #:phases
+      #~(let ((static-dir "/share/hydrus/static"))
+          (modify-phases %standard-phases
+            ;; Hydrus is a python program but does not uses setup.py or any
+            ;; other build system to build itself - it's delivered ready to
+            ;; run from the source.
+            (replace 'check
+              (lambda _
+                (setenv "DISPLAY" ":0")
+                (setenv "XDG_CACHE_HOME" (getcwd))
+                (setenv "HOME" (getcwd))
+                (invoke "xvfb-run" "python" "test.py")))
+            ;; XXX: program help files are not built.  Updating
+            ;; python-pymdown-extensions to its latest version might be the
+            ;; solution, but this would require also packaging its new build
+            ;; system that is not present in guix yet.
+            (delete 'build)
+            (add-before 'install 'patch-variables
+              (lambda* (#:key outputs inputs #:allow-other-keys)
+                (let ((ffmpeg    (search-input-file inputs "/bin/ffmpeg"))
+                      (swfrender (search-input-file inputs "/bin/swfrender"))
+                      (upnpc     (search-input-file inputs "/bin/upnpc"))
+                      (out       (assoc-ref outputs "out")))
+                  (with-directory-excursion "hydrus"
+                    ;; Without this the program would incorrectly assume
+                    ;; that it uses user's ffmpeg binary when it isn't.
+                    (substitute* "client/ClientController.py"
+                      (("if (HydrusVideoHandling\\.FFMPEG_PATH).*" _ var)
+                       (string-append "if " var " == \"" ffmpeg "\":\n")))
+                    (with-directory-excursion "core"
+                      (substitute* "HydrusConstants.py"
+                        (("STATIC_DIR = .*")
+                         (string-append "STATIC_DIR = \"" out static-dir "\"\n")))
+                      (substitute* "HydrusFlashHandling.py"
+                        (("SWFRENDER_PATH = .*\n")
+                         (string-append "SWFRENDER_PATH = \"" swfrender "\"\n")))
+                      (substitute* "HydrusVideoHandling.py"
+                        (("FFMPEG_PATH = .*\n")
+                         (string-append "FFMPEG_PATH = \"" ffmpeg "\"\n")))
+                      (substitute* "networking/HydrusNATPunch.py"
+                        (("UPNPC_PATH = .*\n")
+                         (string-append "UPNPC_PATH = \"" upnpc "\"\n"))))))))
+            ;; Since everything lives in hydrus's root directory, it needs to
+            ;; be spread out to comply with guix's expectations.
+            (replace 'install
+              (lambda* (#:key outputs #:allow-other-keys)
+                (let* ((out (assoc-ref outputs "out"))
+                       (client (string-append out "/bin/hydrus"))
+                       (server (string-append out "/bin/hydrus-server")))
+                  (copy-recursively "static"
+                                    (string-append out static-dir))
+                  (copy-recursively "hydrus"
+                                    (string-append out
+                                                   "/lib/python"
+                                                   (python-version
+                                                    #$(this-package-input "python"))
+                                                   "/site-packages/hydrus"))
+                  (mkdir (string-append out "/bin"))
+                  (copy-file "client.py" client)
+                  (chmod client #o0555)
+                  (copy-file "server.py" server)
+                  (chmod server #o0555))))))))
+    ;; All native-inputs are only needed for the the check phase
+    (native-inputs
+     (list xvfb-run
+           python-nose
+           python-mock
+           python-httmock))
+    ;; All python packages were taken from static/build_files/linux/requirements.txt
+    (propagated-inputs
+     (list python-beautifulsoup4
+           python-cbor2
+           python-chardet
+           python-cloudscraper
+           python-html5lib
+           python-lxml
+           python-lz4
+           python-numpy
+           opencv ; its python bindings are a drop-in replacement for opencv-python-headless
+           python-pillow
+           python-psutil
+           python-pylzma
+           python-pyopenssl
+           ;; Since hydrus' version 494 it supports python-pyside-6 but it's not yet
+           ;; in guix. pyside-2 is still supported as a fallback.
+           python-pyside-2
+           python-pysocks
+           python-mpv
+           python-pyyaml
+           python-qtpy
+           python-requests
+           python-send2trash
+           python-service-identity
+           python-six
+           python-twisted))
+    (inputs
+     (list swftools ffmpeg miniupnpc python))
+    (synopsis "Organize your media with tags like a dektop booru")
+    (description
+     "The hydrus network client is an application written for
+internet-fluent media nerds who have large image/swf/webm collections.
+It browses with tags instead of folders, a little like a booru on your desktop.
+Advanced users can share tags and files anonymously through custom servers that
+any user may run.  Everything is free and privacy is the first concern.")
+    (home-page "https://hydrusnetwork.github.io/hydrus/")
+    (license license:wtfpl2)))
diff --git a/gnu/packages/julia-xyz.scm b/gnu/packages/julia-xyz.scm
index e5b159245c..6aa185486b 100644
--- a/gnu/packages/julia-xyz.scm
+++ b/gnu/packages/julia-xyz.scm
@@ -165,7 +165,8 @@ provides functions to run a few automatable checks for Julia packages.")
      ;; Expression: @inferred(ArrayInterface.size(Rnr)) === (StaticInt(4),)
      ;; Evaluated: (static(2),) === (static(4),)
      ;; Disable as stopgap.
-     (list #:tests? (not (target-x86-32?))))
+     (list #:tests? (not (or (%current-target-system)
+                             (target-x86-32?)))))
     (propagated-inputs
      (list julia-ifelse
            julia-requires
@@ -2048,7 +2049,8 @@ c-style numerical formatting.")
      ;; Expression: dual_isapprox(FDNUM ^ PRIMAL, exp(PRIMAL * log(FDNUM)))
      ;; ERROR: LoadError: LoadError: There was an error during testing
      ;; Disable as stopgap.
-     (list #:tests? (not (target-x86-32?))))
+     (list #:tests? (not (or (%current-target-system)
+                             (target-x86-32?)))))
     (inputs                             ;required for tests
      (list julia-calculus
            julia-difftests))
@@ -2937,7 +2939,8 @@ each one has a fixed size.  Currently support inline strings from 1 byte up to
       ;; Got exception outside of a @test
       ;; OverflowError: 96908232 * 106943408 overflowed for type Int32
       ;; Disable as stopgap.
-      #:tests? (not (target-x86-32?))))
+      #:tests? (not (or (%current-target-system)
+                        (target-x86-32?)))))
     (propagated-inputs
      (list julia-axisalgorithms
            julia-offsetarrays
@@ -4658,7 +4661,8 @@ can be avoided.")
      ;; Expression: hash(tr_float, hash(1)) === hash(v_float, hash(1))
      ;; MethodError: no method matching decompose(::ReverseDiff.TrackedReal{Float64, Float64, Nothing})
      ;; Disable as stopgap.
-     (list #:tests? (not (target-x86-32?))))
+     (list #:tests? (not (or (%current-target-system)
+                             (target-x86-32?)))))
     (propagated-inputs
      (list julia-diffresults
            julia-diffrules
diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index d19d6b754f..f7dd4a9430 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -7683,9 +7683,9 @@ Text-based output formats: CSV, XML, Netfilter's LOG, Netfilter's conntrack
      ;; Disable the test suite on armhf-linux, as there are too many
      ;; failures to keep track of (see for example:
      ;; https://github.com/proot-me/proot/issues/286).
-     `(#:tests? ,(not (string-prefix? "armhf"
-                                      (or (%current-target-system)
-                                          (%current-system))))
+     `(#:tests? ,(not (or (%current-target-system)
+                          (string-prefix? "armhf"
+                                          (or (%current-system)))))
        #:make-flags '("-C" "src")
        #:phases (modify-phases %standard-phases
                   (add-after 'unpack 'patch-sources
diff --git a/gnu/packages/lisp-xyz.scm b/gnu/packages/lisp-xyz.scm
index 6018c4deff..2170a9e267 100644
--- a/gnu/packages/lisp-xyz.scm
+++ b/gnu/packages/lisp-xyz.scm
@@ -22762,6 +22762,37 @@ binding @code{*debugger-hook*} is not enough -- most notably, for
      ;; Tests fail on ECL: https://github.com/phoe/trivial-custom-debugger/issues/3
      '(#:tests? #f))))
 
+(define-public sbcl-safe-read
+  (let ((commit "d25f08597b34d7aaeb86b045d57f7b020a5bb5f0")
+        (revision "0"))
+    (package
+      (name "sbcl-safe-read")
+      (version (git-version "0.1" revision commit))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/phoe/safe-read")
+               (commit commit)))
+         (file-name (git-file-name "cl-safe-read" version))
+         (sha256
+          (base32 "1r9k8danfnqgpbn2vb90n6wdc6jd92h1ig565yplrbh6232lhi26"))))
+      (build-system asdf-build-system/sbcl)
+      (inputs
+       (list sbcl-local-time sbcl-trivial-garbage))
+      (home-page "https://github.com/phoe/safe-read/")
+      (synopsis "Safer variant of READ")
+      (description
+       "This package provides a safer variant of @code{READ} secure against
+internbombing, excessive input and macro characters.")
+      (license license:bsd-2))))
+
+(define-public cl-safe-read
+  (sbcl-package->cl-source-package sbcl-safe-read))
+
+(define-public ecl-safe-read
+  (sbcl-package->ecl-package sbcl-safe-read))
+
 (define-public sbcl-ospm
   (package
     (name "sbcl-ospm")
diff --git a/gnu/packages/llvm.scm b/gnu/packages/llvm.scm
index 2d3ee79339..0f4890af8c 100644
--- a/gnu/packages/llvm.scm
+++ b/gnu/packages/llvm.scm
@@ -24,6 +24,7 @@
 ;;; Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2022 Greg Hogan <code@greghogan.com>
 ;;; Copyright © 2022 John Kehayias <john.kehayias@protonmail.com>
+;;; Copyright © 2022 Clément Lassieur <clement@lassieur.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1842,6 +1843,7 @@ setup(name=\"clang\", packages=[\"clang\"])\n")))))
     (build-system emacs-build-system)
     (inputs
      (list clang))
+    (propagated-inputs '())
     (arguments
      `(#:phases
        (modify-phases %standard-phases
diff --git a/gnu/packages/lua.scm b/gnu/packages/lua.scm
index afebc6bc1f..c3bb1e8f5b 100644
--- a/gnu/packages/lua.scm
+++ b/gnu/packages/lua.scm
@@ -1179,48 +1179,43 @@ enabled.")
    (license license:boost1.0)))
 
 (define-public fennel
-  ;; The 1.0.0 release had a bug where fennel installed under 5.4 no matter
-  ;; what lua was used to compile it. There has since been an update that
-  ;; corrects this issue, so we can rely on the version of the lua input to
-  ;; determine where the fennel.lua file got installed to.
-  (let ((commit "03c1c95f2a79e45a9baf607f96a74c693b8b70f4")
-        (revision "0"))
-    (package
-      (name "fennel")
-      (version (git-version "1.0.0" revision commit))
-      (source (origin
-                (method git-fetch)
-                (uri (git-reference
-                      (url "https://git.sr.ht/~technomancy/fennel")
-                      (commit commit)))
-                (file-name (git-file-name name version))
-                (sha256
-                 (base32
-                  "1znp38h5q819gvcyl248zwvjsljfxdxdk8n82fnj6lyibiiqzgvx"))))
-      (build-system gnu-build-system)
-      (arguments
-       '(#:make-flags (list (string-append "PREFIX=" (assoc-ref %outputs "out")))
-         #:tests? #t      ; even on cross-build
-         #:test-target "test"
-         #:phases
-         (modify-phases %standard-phases
-          (delete 'configure)
-          (add-after 'build 'patch-fennel
-           (lambda* (#:key inputs #:allow-other-keys)
-            (substitute* "fennel"
-             (("/usr/bin/env .*lua")
-              (search-input-file inputs "/bin/lua")))))
-          (delete 'check)
-          (add-after 'install 'check
-           (assoc-ref %standard-phases 'check)))))
-      (inputs (list lua))
-      (home-page "https://fennel-lang.org/")
-      (synopsis "Lisp that compiles to Lua")
-      (description
-       "Fennel is a programming language that brings together the speed,
+  (package
+    (name "fennel")
+    (version "1.2.0")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://git.sr.ht/~technomancy/fennel")
+                    (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0klqxhgc9s6rm2xbn2fyzw9nzdas65g84js7s69by0gv2jzalyad"))))
+    (build-system gnu-build-system)
+    (arguments
+     (list #:make-flags #~(list (string-append "PREFIX="
+                                               (assoc-ref %outputs "out")))
+           #:tests? #t ;even on cross-build
+           #:test-target "test"
+           #:phases #~(modify-phases %standard-phases
+                        (delete 'configure)
+                        (add-after 'build 'patch-fennel
+                          (lambda* (#:key inputs #:allow-other-keys)
+                            (substitute* "fennel"
+                              (("/usr/bin/env .*lua")
+                               (search-input-file inputs "/bin/lua")))))
+                        (delete 'check)
+                        (add-after 'install 'check
+                          (assoc-ref %standard-phases
+                                     'check)))))
+    (inputs (list lua))
+    (home-page "https://fennel-lang.org/")
+    (synopsis "Lisp that compiles to Lua")
+    (description
+     "Fennel is a programming language that brings together the speed,
 simplicity, and reach of Lua with the flexibility of a Lisp syntax and macro
 system.")
-      (license license:expat))))
+    (license license:expat)))
 
 (define-public fnlfmt
   (package
diff --git a/gnu/packages/music.scm b/gnu/packages/music.scm
index e1de632dda..5b6440455e 100644
--- a/gnu/packages/music.scm
+++ b/gnu/packages/music.scm
@@ -565,7 +565,7 @@ It is a fork of Clementine aimed at music collectors and audiophiles.")
 (define-public cmus
   (package
     (name "cmus")
-    (version "2.9.1")
+    (version "2.10.0")
     (source (origin
               (method git-fetch)
               (uri (git-reference
@@ -574,7 +574,7 @@ It is a fork of Clementine aimed at music collectors and audiophiles.")
               (file-name (git-file-name name version))
               (sha256
                (base32
-                "0zjkimni2fhv4yskrjrgj6b74f33rfj58zgd7khwrz4z8nf88j0w"))))
+                "0csj59q2n7hz9zihq92kb4kzvb51rgzl65y6vd0chq6j3li1pb8x"))))
     (build-system gnu-build-system)
     (arguments
      `(#:tests? #f ; cmus does not include tests
diff --git a/gnu/packages/networking.scm b/gnu/packages/networking.scm
index 2fea1b2b59..c16ae00ec4 100644
--- a/gnu/packages/networking.scm
+++ b/gnu/packages/networking.scm
@@ -1727,14 +1727,14 @@ of the same name.")
 (define-public wireshark
   (package
     (name "wireshark")
-    (version "3.6.2")
+    (version "3.6.7")
     (source
      (origin
        (method url-fetch)
        (uri (string-append "https://www.wireshark.org/download/src/wireshark-"
                            version ".tar.xz"))
        (sha256
-        (base32 "03n34jh4318y3q14jclxfxi4r7b9l393w9fw9bq57ydff9aim42x"))))
+        (base32 "1idpxnh8vrvan3g0ymaa24bd4iyxi19xrr76sdrrpxx2r8shmqfc"))))
     (build-system cmake-build-system)
     (arguments
      `(#:phases
diff --git a/gnu/packages/node.scm b/gnu/packages/node.scm
index 2839348554..4e9daa522d 100644
--- a/gnu/packages/node.scm
+++ b/gnu/packages/node.scm
@@ -290,7 +290,7 @@
            icu4c
            libuv
            `(,nghttp2 "lib")
-           openssl
+           openssl-1.1
            zlib
            ;; Regular build-time dependencies.
            perl
@@ -867,7 +867,7 @@ source files.")
            icu4c-71
            libuv-for-node
            `(,nghttp2 "lib")
-           openssl
+           openssl-1.1
            zlib
            ;; Regular build-time dependencies.
            perl
@@ -884,7 +884,7 @@ source files.")
            llhttp-bootstrap
            brotli
            `(,nghttp2 "lib")
-           openssl
+           openssl-1.1
            python-wrapper ;; for node-gyp (supports python3)
            zlib))))
 
diff --git a/gnu/packages/ocr.scm b/gnu/packages/ocr.scm
index 21d257ef24..0382e0d869 100644
--- a/gnu/packages/ocr.scm
+++ b/gnu/packages/ocr.scm
@@ -177,9 +177,11 @@ models for the Tesseract OCR Engine.")
     (inputs
      (list cairo
            icu4c
-           leptonica
            pango
            python-wrapper))
+    (propagated-inputs
+     ;; Required by tesseract.pc.
+     (list leptonica))
     (native-search-paths (list (search-path-specification
                                 (variable "TESSDATA_PREFIX")
                                 (files (list "share/tesseract-ocr/tessdata"))
diff --git a/gnu/packages/patches/accountsservice-extensions.patch b/gnu/packages/patches/accountsservice-extensions.patch
new file mode 100644
index 0000000000..2cfab580e3
--- /dev/null
+++ b/gnu/packages/patches/accountsservice-extensions.patch
@@ -0,0 +1,25 @@
+Patch from NixOS retrieved from
+https://raw.githubusercontent.com/NixOS/nixpkgs/master/pkgs/development/libraries/accountsservice/drop-prefix-check-extensions.patch.
+
+diff --git a/src/extensions.c b/src/extensions.c
+index 038dcb2..830465d 100644
+--- a/src/extensions.c
++++ b/src/extensions.c
+@@ -121,16 +121,7 @@ daemon_read_extension_directory (GHashTable  *ifaces,
+                         continue;
+                 }
+ 
+-                /* Ensure it looks like "../../dbus-1/interfaces/${name}" */
+-                const gchar * const prefix = "../../dbus-1/interfaces/";
+-                if (g_str_has_prefix (symlink, prefix) && g_str_equal (symlink + strlen (prefix), name)) {
+-                        daemon_read_extension_file (ifaces, filename);
+-                }
+-                else {
+-                        g_warning ("Found accounts service vendor extension symlink %s, but it must be exactly "
+-                                   "equal to '../../dbus-1/interfaces/%s' for forwards-compatibility reasons.",
+-                                   filename, name);
+-                }
++                daemon_read_extension_file (ifaces, filename);
+         }
+ 
+         g_dir_close (dir);
diff --git a/gnu/packages/patches/lightdm-arguments-ordering.patch b/gnu/packages/patches/lightdm-arguments-ordering.patch
new file mode 100644
index 0000000000..c3b513a19a
--- /dev/null
+++ b/gnu/packages/patches/lightdm-arguments-ordering.patch
@@ -0,0 +1,54 @@
+When providing the VNCServer command as 'Xvnc -SecurityTypes None',
+the formatted command line used would look like:
+
+  Xvnc  -SecurityTypes None :1 -auth /var/run/lightdm/root/:1
+
+which is invalid (the display number must appear first).
+
+Submitted upstream at: https://github.com/canonical/lightdm/pull/265
+
+ src/x-server-local.c | 14 +++++++++++++-
+ 1 file changed, 13 insertions(+), 1 deletion(-)
+
+diff --git a/src/x-server-local.c b/src/x-server-local.c
+index 7c4ab870..6c540d18 100644
+--- a/src/x-server-local.c
++++ b/src/x-server-local.c
+@@ -463,14 +463,20 @@ x_server_local_start (DisplayServer *display_server)
+     l_debug (display_server, "Logging to %s", log_file);
+ 
+     g_autofree gchar *absolute_command = get_absolute_command (priv->command);
++    g_auto(GStrv) tokens = g_strsplit (absolute_command, " ", 2);
++    const gchar* binary = tokens[0];
++    const gchar *extra_options = tokens[1];
++
+     if (!absolute_command)
+     {
+         l_debug (display_server, "Can't launch X server %s, not found in path", priv->command);
+         stopped_cb (priv->x_server_process, X_SERVER_LOCAL (server));
+         return FALSE;
+     }
+-    g_autoptr(GString) command = g_string_new (absolute_command);
++    g_autoptr(GString) command = g_string_new (binary);
+ 
++    /* The display argument must be given first when the X server used
++     * is Xvnc. */
+     g_string_append_printf (command, " :%d", priv->display_number);
+ 
+     if (priv->config_file)
+@@ -513,6 +519,12 @@ x_server_local_start (DisplayServer *display_server)
+     if (X_SERVER_LOCAL_GET_CLASS (server)->add_args)
+         X_SERVER_LOCAL_GET_CLASS (server)->add_args (server, command);
+ 
++    /* Any extra user options provided via the VNCServer 'command'
++     * config option are appended last, so the user can override any
++     * of the above. */
++    if (extra_options)
++        g_string_append_printf (command, " %s", extra_options);
++
+     process_set_command (priv->x_server_process, command->str);
+ 
+     l_debug (display_server, "Launching X Server");
+-- 
+2.36.1
+
diff --git a/gnu/packages/patches/lightdm-vnc-color-depth.patch b/gnu/packages/patches/lightdm-vnc-color-depth.patch
new file mode 100644
index 0000000000..cd69977d6a
--- /dev/null
+++ b/gnu/packages/patches/lightdm-vnc-color-depth.patch
@@ -0,0 +1,81 @@
+There is no longer support for 8 bit color depth in TigerVNC (see:
+https://github.com/TigerVNC/tigervnc/commit/e86d8720ba1e79b486ca29a5c2b27fa25811e6a2);
+using it causes a fatal error.
+
+Submitted upstream at: https://github.com/canonical/lightdm/pull/265.
+
+diff --git a/data/lightdm.conf b/data/lightdm.conf
+index 0df38429..60e3e8b4 100644
+--- a/data/lightdm.conf
++++ b/data/lightdm.conf
+@@ -160,4 +160,4 @@
+ #listen-address=
+ #width=1024
+ #height=768
+-#depth=8
++#depth=24
+diff --git a/src/x-server-xvnc.c b/src/x-server-xvnc.c
+index 68340d53..27ca4454 100644
+--- a/src/x-server-xvnc.c
++++ b/src/x-server-xvnc.c
+@@ -127,7 +127,7 @@ x_server_xvnc_init (XServerXVNC *server)
+     XServerXVNCPrivate *priv = x_server_xvnc_get_instance_private (server);
+     priv->width = 1024;
+     priv->height = 768;
+-    priv->depth = 8;
++    priv->depth = 24;
+ }
+ 
+ static void
+diff --git a/tests/scripts/vnc-command.conf b/tests/scripts/vnc-command.conf
+index 0f1e25fd..335956d9 100644
+--- a/tests/scripts/vnc-command.conf
++++ b/tests/scripts/vnc-command.conf
+@@ -19,7 +19,7 @@ command=Xvnc -option
+ #?VNC-CLIENT CONNECT
+ 
+ # Xvnc server starts
+-#?XVNC-0 START GEOMETRY=1024x768 DEPTH=8 OPTION=TRUE
++#?XVNC-0 START GEOMETRY=1024x768 DEPTH=24 OPTION=TRUE
+ 
+ # Daemon connects when X server is ready
+ #?*XVNC-0 INDICATE-READY
+diff --git a/tests/scripts/vnc-guest.conf b/tests/scripts/vnc-guest.conf
+index 431bb244..ce2b97db 100644
+--- a/tests/scripts/vnc-guest.conf
++++ b/tests/scripts/vnc-guest.conf
+@@ -21,7 +21,7 @@ user-session=default
+ #?VNC-CLIENT CONNECT
+ 
+ # Xvnc server starts
+-#?XVNC-0 START GEOMETRY=1024x768 DEPTH=8 OPTION=FALSE
++#?XVNC-0 START GEOMETRY=1024x768 DEPTH=24 OPTION=FALSE
+ 
+ # Daemon connects when X server is ready
+ #?*XVNC-0 INDICATE-READY
+diff --git a/tests/scripts/vnc-login.conf b/tests/scripts/vnc-login.conf
+index cdfe17b8..f0d65b7f 100644
+--- a/tests/scripts/vnc-login.conf
++++ b/tests/scripts/vnc-login.conf
+@@ -21,7 +21,7 @@ user-session=default
+ #?VNC-CLIENT CONNECT
+ 
+ # Xvnc server starts
+-#?XVNC-0 START GEOMETRY=1024x768 DEPTH=8 OPTION=FALSE
++#?XVNC-0 START GEOMETRY=1024x768 DEPTH=24 OPTION=FALSE
+ 
+ # Daemon connects when X server is ready
+ #?*XVNC-0 INDICATE-READY
+diff --git a/tests/scripts/vnc-open-file-descriptors.conf b/tests/scripts/vnc-open-file-descriptors.conf
+index 753c84dd..e5d35730 100644
+--- a/tests/scripts/vnc-open-file-descriptors.conf
++++ b/tests/scripts/vnc-open-file-descriptors.conf
+@@ -21,7 +21,7 @@ user-session=default
+ #?VNC-CLIENT CONNECT
+ 
+ # Xvnc server starts
+-#?XVNC-0 START GEOMETRY=1024x768 DEPTH=8 OPTION=FALSE
++#?XVNC-0 START GEOMETRY=1024x768 DEPTH=24 OPTION=FALSE
+ 
+ # Daemon connects when X server is ready
+ #?*XVNC-0 INDICATE-READY
diff --git a/gnu/packages/patches/lightdm-vncserver-check.patch b/gnu/packages/patches/lightdm-vncserver-check.patch
new file mode 100644
index 0000000000..0e31ff3d68
--- /dev/null
+++ b/gnu/packages/patches/lightdm-vncserver-check.patch
@@ -0,0 +1,66 @@
+Honor the Xvnc command specified in the config instead of using a hard-coded
+default.
+
+Submitted upstream at: https://github.com/canonical/lightdm/pull/265
+
+diff --git a/src/lightdm.c b/src/lightdm.c
+index 74f9ff2d..0ccfcd78 100644
+--- a/src/lightdm.c
++++ b/src/lightdm.c
+@@ -349,27 +349,42 @@ start_display_manager (void)
+     /* Start the VNC server */
+     if (config_get_boolean (config_get_instance (), "VNCServer", "enabled"))
+     {
+-        g_autofree gchar *path = g_find_program_in_path ("Xvnc");
+-        if (path)
++        /* Validate that a the VNC command is available. */
++        g_autofree gchar *command = config_get_string (config_get_instance (), "VNCServer", "command");
++        if (command)
+         {
+-            vnc_server = vnc_server_new ();
+-            if (config_has_key (config_get_instance (), "VNCServer", "port"))
++            g_auto(GStrv) tokens = g_strsplit (command, " ", 2);
++            if (!g_find_program_in_path (tokens[0]))
+             {
+-                gint port = config_get_integer (config_get_instance (), "VNCServer", "port");
+-                if (port > 0)
+-                    vnc_server_set_port (vnc_server, port);
++                g_warning ("Can't start VNC server; command '%s' not found", tokens[0]);
++                return;
+             }
+-            g_autofree gchar *listen_address = config_get_string (config_get_instance (), "VNCServer", "listen-address");
+-            vnc_server_set_listen_address (vnc_server, listen_address);
+-            g_signal_connect (vnc_server, VNC_SERVER_SIGNAL_NEW_CONNECTION, G_CALLBACK (vnc_connection_cb), NULL);
+-
+-            g_debug ("Starting VNC server on TCP/IP port %d", vnc_server_get_port (vnc_server));
+-            vnc_server_start (vnc_server);
+         }
+         else
+-            g_warning ("Can't start VNC server, Xvnc is not in the path");
++        {
++            /* Fallback to 'Xvnc'. */
++            if (!g_find_program_in_path ("Xvnc")) {
++                g_warning ("Can't start VNC server; 'Xvnc' command not found");
++                return;
++            }
++        }
++
++        vnc_server = vnc_server_new ();
++        if (config_has_key (config_get_instance (), "VNCServer", "port"))
++        {
++            gint port = config_get_integer (config_get_instance (), "VNCServer", "port");
++            if (port > 0)
++                vnc_server_set_port (vnc_server, port);
++        }
++        g_autofree gchar *listen_address = config_get_string (config_get_instance (), "VNCServer", "listen-address");
++        vnc_server_set_listen_address (vnc_server, listen_address);
++        g_signal_connect (vnc_server, VNC_SERVER_SIGNAL_NEW_CONNECTION, G_CALLBACK (vnc_connection_cb), NULL);
++
++        g_debug ("Starting VNC server on TCP/IP port %d", vnc_server_get_port (vnc_server));
++        vnc_server_start (vnc_server);
+     }
+ }
++
+ static void
+ service_ready_cb (DisplayManagerService *service)
+ {
diff --git a/gnu/packages/patches/mercurial-openssl-compat.patch b/gnu/packages/patches/mercurial-openssl-compat.patch
new file mode 100644
index 0000000000..139356f285
--- /dev/null
+++ b/gnu/packages/patches/mercurial-openssl-compat.patch
@@ -0,0 +1,89 @@
+Tweak cipher selection to make TLS < 1.2 work with OpenSSL 3.
+
+Taken from Debian:
+
+  https://salsa.debian.org/python-team/packages/mercurial/-/blob/debian/master/debian/patches/openssl_3_cipher_tlsv1.patch
+
+--- a/mercurial/sslutil.py
++++ b/mercurial/sslutil.py
+@@ -117,17 +117,17 @@ def _hostsettings(ui, hostname):
+     ciphers = ui.config(b'hostsecurity', b'%s:ciphers' % bhostname, ciphers)
+ 
+     # If --insecure is used, we allow the use of TLS 1.0 despite config options.
+     # We always print a "connection security to %s is disabled..." message when
+     # --insecure is used. So no need to print anything more here.
+     if ui.insecureconnections:
+         minimumprotocol = b'tls1.0'
+         if not ciphers:
+-            ciphers = b'DEFAULT'
++            ciphers = b'DEFAULT:@SECLEVEL=0'
+ 
+     s[b'minimumprotocol'] = minimumprotocol
+     s[b'ciphers'] = ciphers
+ 
+     # Look for fingerprints in [hostsecurity] section. Value is a list
+     # of <alg>:<fingerprint> strings.
+     fingerprints = ui.configlist(
+         b'hostsecurity', b'%s:fingerprints' % bhostname
+@@ -621,17 +621,17 @@ def wrapserversocket(
+ 
+     # Improve forward secrecy.
+     sslcontext.options |= getattr(ssl, 'OP_SINGLE_DH_USE', 0)
+     sslcontext.options |= getattr(ssl, 'OP_SINGLE_ECDH_USE', 0)
+ 
+     # In tests, allow insecure ciphers
+     # Otherwise, use the list of more secure ciphers if found in the ssl module.
+     if exactprotocol:
+-        sslcontext.set_ciphers('DEFAULT')
++        sslcontext.set_ciphers('DEFAULT:@SECLEVEL=0')
+     elif util.safehasattr(ssl, b'_RESTRICTED_SERVER_CIPHERS'):
+         sslcontext.options |= getattr(ssl, 'OP_CIPHER_SERVER_PREFERENCE', 0)
+         # pytype: disable=module-attr
+         sslcontext.set_ciphers(ssl._RESTRICTED_SERVER_CIPHERS)
+         # pytype: enable=module-attr
+ 
+     if requireclientcert:
+         sslcontext.verify_mode = ssl.CERT_REQUIRED
+--- a/tests/test-https.t
++++ b/tests/test-https.t
+@@ -356,19 +356,19 @@ Start servers running supported TLS vers
+   $ cat ../hg1.pid >> $DAEMON_PIDS
+   $ hg serve -p $HGPORT2 -d --pid-file=../hg2.pid --certificate=$PRIV \
+   > --config devel.serverexactprotocol=tls1.2
+   $ cat ../hg2.pid >> $DAEMON_PIDS
+   $ cd ..
+ 
+ Clients talking same TLS versions work
+ 
+-  $ P="$CERTSDIR" hg --config hostsecurity.minimumprotocol=tls1.0 --config hostsecurity.ciphers=DEFAULT id https://localhost:$HGPORT/
++  $ P="$CERTSDIR" hg --config hostsecurity.minimumprotocol=tls1.0 --config hostsecurity.ciphers=DEFAULT:@SECLEVEL=0 id https://localhost:$HGPORT/
+   5fed3813f7f5
+-  $ P="$CERTSDIR" hg --config hostsecurity.minimumprotocol=tls1.1 --config hostsecurity.ciphers=DEFAULT id https://localhost:$HGPORT1/
++  $ P="$CERTSDIR" hg --config hostsecurity.minimumprotocol=tls1.1 --config hostsecurity.ciphers=DEFAULT:@SECLEVEL=0 id https://localhost:$HGPORT1/
+   5fed3813f7f5
+   $ P="$CERTSDIR" hg --config hostsecurity.minimumprotocol=tls1.2 id https://localhost:$HGPORT2/
+   5fed3813f7f5
+ 
+ Clients requiring newer TLS version than what server supports fail
+ 
+   $ P="$CERTSDIR" hg id https://localhost:$HGPORT/
+   (could not negotiate a common security protocol (tls1.1+) with localhost; the likely cause is Mercurial is configured to be more secure than the server can support)
+@@ -400,17 +400,17 @@ Clients requiring newer TLS version than
+ 
+   $ hg --config hostsecurity.minimumprotocol=tls1.2 id --insecure https://localhost:$HGPORT1/
+   warning: connection security to localhost is disabled per current settings; communication is susceptible to eavesdropping and tampering
+   5fed3813f7f5
+ 
+ The per-host config option overrides the default
+ 
+   $ P="$CERTSDIR" hg id https://localhost:$HGPORT/ \
+-  > --config hostsecurity.ciphers=DEFAULT \
++  > --config hostsecurity.ciphers=DEFAULT:@SECLEVEL=0 \
+   > --config hostsecurity.minimumprotocol=tls1.2 \
+   > --config hostsecurity.localhost:minimumprotocol=tls1.0
+   5fed3813f7f5
+ 
+ The per-host config option by itself works
+ 
+   $ P="$CERTSDIR" hg id https://localhost:$HGPORT/ \
+   > --config hostsecurity.localhost:minimumprotocol=tls1.2
diff --git a/gnu/packages/pdf.scm b/gnu/packages/pdf.scm
index 39266a2822..14f75d9ef9 100644
--- a/gnu/packages/pdf.scm
+++ b/gnu/packages/pdf.scm
@@ -6,7 +6,7 @@
 ;;; Copyright © 2016 Roel Janssen <roel@gnu.org>
 ;;; Copyright © 2016 Nikita <nikita@n0.is>
 ;;; Copyright © 2016, 2017, 2018, 2019, 2020, 2022 Efraim Flashner <efraim@flashner.co.il>
-;;; Copyright © 2016, 2017 Marius Bakke <mbakke@fastmail.com>
+;;; Copyright © 2016, 2017, 2022 Marius Bakke <marius@gnu.org>
 ;;; Copyright © 2016, 2017, 2019 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2016 Julien Lepiller <julien@lepiller.eu>
 ;;; Copyright © 2016, 2019 Arun Isaac <arunisaac@systemreboot.net>
@@ -82,6 +82,7 @@
   #:use-module (gnu packages lua)
   #:use-module (gnu packages man)
   #:use-module (gnu packages markup)
+  #:use-module (gnu packages ocr)
   #:use-module (gnu packages pcre)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages photo)
@@ -518,7 +519,7 @@ using the DjVuLibre library.")
 (define-public zathura-pdf-mupdf
   (package
     (name "zathura-pdf-mupdf")
-    (version "0.3.6")
+    (version "0.3.9")
     (source (origin
               (method url-fetch)
               (uri
@@ -526,39 +527,39 @@ using the DjVuLibre library.")
                               "/download/zathura-pdf-mupdf-" version ".tar.xz"))
               (sha256
                (base32
-                "1r3v37k9fl2rxipvacgxr36llywvy7n20a25h3ajlyk70697sa66"))))
+                "01vw0lrcj9g7d5h2xvm4xb08mvfld4syfr381fjrbdj52zm9bxvp"))))
     (native-inputs (list pkg-config))
     (inputs
-     `(("jbig2dec" ,jbig2dec)
-       ("libjpeg" ,libjpeg-turbo)
-       ("mujs" ,mujs)
-       ("mupdf" ,mupdf)
-       ("openjpeg" ,openjpeg)
-       ("openssl" ,openssl)
-       ("zathura" ,zathura)))
+     (list gumbo-parser
+           jbig2dec
+           libjpeg-turbo
+           mujs
+           mupdf
+           openjpeg
+           openssl
+           tesseract-ocr
+           zathura))
     (build-system meson-build-system)
     (arguments
      `(#:tests? #f                      ; package does not contain tests
        #:configure-flags (list (string-append "-Dplugindir="
                                               (assoc-ref %outputs "out")
-                                              "/lib/zathura")
-                               "-Dlink-external=true")
+                                              "/lib/zathura"))
        #:phases
        (modify-phases %standard-phases
          (add-after 'unpack 'remove-libmupdfthird.a-requirement
            (lambda _
              ;; Ignore a missing (apparently superfluous) static library.
              (substitute* "meson.build"
-               ((".*mupdfthird.*") ""))
-             #t))
-         (add-before 'configure 'add-mujs-to-dependencies
+               (("mupdfthird = .*")
+                "")
+               ((", mupdfthird")
+                ""))))
+         (add-after 'unpack 'fix-mupdf-detection
            (lambda _
-             ;; Add mujs to the 'build_dependencies'.
              (substitute* "meson.build"
-               (("^  libopenjp2 = dependency.*" x)
-                (string-append x "  mujs = cc.find_library('mujs')\n"))
-               (("^    libopenjp2")
-                "    libopenjp2, mujs")))))))
+               (("dependency\\('mupdf', required: false\\)")
+                "cc.find_library('mupdf')")))))))
     (home-page "https://pwmt.org/projects/zathura-pdf-mupdf/")
     (synopsis "PDF support for zathura (mupdf backend)")
     (description "The zathura-pdf-mupdf plugin adds PDF support to zathura
@@ -731,20 +732,20 @@ and based on PDF specification 1.7.")
 (define-public mupdf
   (package
     (name "mupdf")
-    (version "1.19.1")
+    (version "1.20.3")
     (source
      (origin
        (method url-fetch)
        (uri (string-append "https://mupdf.com/downloads/archive/"
-                           "mupdf-" version "-source.tar.xz"))
+                           "mupdf-" version "-source.tar.lz"))
        (sha256
-        (base32 "0gl0wf16m1cafs20h3v1f4ysf7zlbijjyd6s1r1krwvlzriwdsmm"))
+        (base32
+         "0s0qclxxdjis04mczgz0fhfpv0j8llk48g82zlfrk0daz0zgcwvg"))
        (modules '((guix build utils)))
        (snippet
         #~(begin
-            ;; Remove bundled software.
-            (let* ((keep (list "extract"
-                               "lcms2")) ; different from our lcms2 package
+            ;; Remove bundled software.  Keep patched variants.
+            (let* ((keep (list "extract" "freeglut" "lcms2"))
                    (from "thirdparty")
                    (kept (string-append from "~temp")))
               (mkdir-p kept)
@@ -757,7 +758,9 @@ and based on PDF specification 1.7.")
     (build-system gnu-build-system)
     (inputs
      (list curl
-           freeglut
+           libxrandr
+           libxi
+           freeglut                     ;for GL/gl.h
            freetype
            gumbo-parser
            harfbuzz
@@ -773,24 +776,36 @@ and based on PDF specification 1.7.")
      (list pkg-config))
     (arguments
      (list
-       #:tests? #f                      ; no check target
-       #:make-flags
-       #~(list "verbose=yes"
-               (string-append "CC=" #$(cc-for-target))
-               "XCFLAGS=-fpic"
-               "USE_SYSTEM_LIBS=yes"
-               "USE_SYSTEM_MUJS=yes"
-               "shared=yes"
-               ;; Even with the linkage patch we must fix RUNPATH.
-               (string-append "LDFLAGS=-Wl,-rpath=" #$output "/lib")
-               (string-append "prefix=" #$output))
-        #:phases
-        #~(modify-phases %standard-phases
-            (delete 'configure))))      ; no configure script
+      #:tests? #f                       ;no check target
+      #:make-flags
+      #~(list "verbose=yes"
+              (string-append "CC=" #$(cc-for-target))
+              "XCFLAGS=-fpic"
+              "USE_SYSTEM_FREETYPE=yes"
+              "USE_SYSTEM_GUMBO=yes"
+              "USE_SYSTEM_HARFBUZZ=yes"
+              "USE_SYSTEM_JBIG2DEC=yes"
+              "USE_SYSTEM_JPEGXR=no # not available"
+              "USE_SYSTEM_LCMS2=no # lcms2mt is strongly preferred"
+              "USE_SYSTEM_LIBJPEG=yes"
+              "USE_SYSTEM_MUJS=no # not available"
+              "USE_SYSTEM_OPENJPEG=yes"
+              "USE_SYSTEM_ZLIB=yes"
+              "USE_SYSTEM_GLUT=no"
+              "USE_SYSTEM_CURL=yes"
+              "USE_SYSTEM_LEPTONICA=yes"
+              "USE_SYSTEM_TESSERACT=yes"
+              "USE_SYSTEM_MUJS=yes"
+              "shared=yes"
+              (string-append "LDFLAGS=-Wl,-rpath=" #$output "/lib")
+              (string-append "prefix=" #$output))
+      #:phases
+      #~(modify-phases %standard-phases
+          (delete 'configure)))) ;no configure script
     (home-page "https://mupdf.com")
     (synopsis "Lightweight PDF viewer and toolkit")
     (description
-      "MuPDF is a C library that implements a PDF and XPS parsing and
+     "MuPDF is a C library that implements a PDF and XPS parsing and
 rendering engine.  It is used primarily to render pages into bitmaps,
 but also provides support for other operations such as searching and
 listing the table of contents and hyperlinks.
@@ -799,9 +814,9 @@ The library ships with a rudimentary X11 viewer, and a set of command
 line tools for batch rendering @command{pdfdraw}, rewriting files
 @command{pdfclean}, and examining the file structure @command{pdfshow}.")
     (license (list license:agpl3+
-                   license:bsd-3 ; resources/cmaps
-                   license:x11 ; thirdparty/lcms2
-                   license:silofl1.1 ; resources/fonts/{han,noto,sil,urw}
+                   license:bsd-3        ;resources/cmaps
+                   license:x11          ;thirdparty/lcms2
+                   license:silofl1.1    ;resources/fonts/{han,noto,sil,urw}
                    license:asl2.0)))) ; resources/fonts/droid
 
 (define-public qpdf
diff --git a/gnu/packages/python-check.scm b/gnu/packages/python-check.scm
index 7cc266fbce..d7a7a90706 100644
--- a/gnu/packages/python-check.scm
+++ b/gnu/packages/python-check.scm
@@ -15,6 +15,7 @@
 ;;; Copyright © 2021 Bonface Munyoki Kilyungi <me@bonfacemunyoki.com>
 ;;; Copyright © 2022 Malte Frank Gerdes <malte.f.gerdes@gmail.com>
 ;;; Copyright © 2022 Felix Gruber <felgru@posteo.net>
+;;; Copyright © 2022 Tomasz Jeneralczyk <tj@schwi.pl>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -2373,3 +2374,24 @@ diagnostics to end up in your TAP output (as TAP diagnostics, YAML blocks, or
 attachments).
 @end itemize")
     (license license:expat)))
+
+(define-public python-xvfbwrapper
+  (package
+    (name "python-xvfbwrapper")
+    (version "0.2.9")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "xvfbwrapper" version))
+              (sha256
+               (base32
+                "097wxhvp01ikqpg1z3v8rqhss6f1vwr399zpz9a05d2135bsxx5w"))))
+    (build-system python-build-system)
+    (propagated-inputs (list xorg-server-for-tests))
+    (home-page "https://github.com/cgoldberg/xvfbwrapper")
+    (synopsis "Python module for controlling virtual displays with Xvfb")
+    (description
+     "Xvfb (X virtual framebuffer) is a display server implementing
+the X11 display server protocol.  It runs in memory and does not require a
+physical display.  Only a network layer is necessary.  Xvfb is useful for
+running acceptance tests on headless servers.")
+    (license license:expat)))
diff --git a/gnu/packages/python-crypto.scm b/gnu/packages/python-crypto.scm
index 3ff05c0c9f..417f9c5a34 100644
--- a/gnu/packages/python-crypto.scm
+++ b/gnu/packages/python-crypto.scm
@@ -608,7 +608,7 @@ message digests and key derivation functions.")
                (add-after 'unpack 'set-no-rust
                  (lambda _
                    (setenv "CRYPTOGRAPHY_DONT_BUILD_RUST" "1"))))))
-    (inputs (list openssl))
+    (inputs (list openssl-1.1))
     (native-inputs
      (list python-cryptography-vectors
            python-hypothesis
diff --git a/gnu/packages/python-web.scm b/gnu/packages/python-web.scm
index 8760b3968f..6ae6673ad3 100644
--- a/gnu/packages/python-web.scm
+++ b/gnu/packages/python-web.scm
@@ -54,6 +54,8 @@
 ;;; Copyright © 2022 Antero Mejr <antero@mailbox.org>
 ;;; Copyright © 2022 Luis Henrique Gomes Higino <luishenriquegh2701@gmail.com>
 ;;; Copyright © 2022 Nicolas Graves <ngraves@ngraves.fr>
+;;; Copyright © 2022 Tomasz Jeneralczyk <tj@schwi.pl>
+;;; Copyright © 2022 msimonin <matthieu.simonin@inria.fr>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -6270,17 +6272,16 @@ Encoding for HTTP.")
 (define-public python-cloudscraper
   (package
     (name "python-cloudscraper")
-    (version "1.2.58")
+    (version "1.2.60")
     (source
      (origin
        (method git-fetch)
        (uri (git-reference
              (url "https://github.com/VeNoMouS/cloudscraper")
-             ;; Corresponds to 1.2.58
-             (commit "f3a3d067ea8b5238e9a0948aed0c3fa0d9c29b96")))
+             (commit version)))
        (file-name (git-file-name name version))
        (sha256
-        (base32 "18fbp086imabjxly04rrchbf6n6m05bpd150zxbw7z2w3mjnpsqd"))
+        (base32 "00cmxgwdm0x1j4a4ipwvpzih735hdzidljbijk1b3laj3dgvnvsm"))
        (modules '((guix build utils)))
        (snippet
         '(with-directory-excursion "cloudscraper"
@@ -6320,7 +6321,7 @@ Encoding for HTTP.")
            python-requests
            python-requests-toolbelt
            python-responses
-           python-pyparsing-2.4.7))
+           python-pyparsing))
     (native-inputs
      (list python-pytest))
     (home-page "https://github.com/venomous/cloudscraper")
@@ -7786,3 +7787,28 @@ list, create, update, or delete resources (e.g. Order, Product, Collection).")
     (description
      "This package provides a library to parse and apply patches.")
     (license license:expat)))
+
+(define-public python-grid5000
+  (package
+    (name "python-grid5000")
+    (version "1.2.3")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://gitlab.inria.fr/msimonin/python-grid5000")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               "097pm8b68ihk29xz9zv29b1x0bhgjb4lfj8zxk2grbsh7wr9dipg")))
+    (build-system python-build-system)
+    (native-inputs (list python-wheel))
+    (propagated-inputs (list python-requests python-ipython python-pyyaml))
+    (arguments
+     (list #:tests? #f)) ; No tests.
+    (home-page "https://pypi.org/project/python-grid5000/")
+    (synopsis "Grid5000 python client")
+    (description
+     "python-grid5000 is a python package wrapping the Grid5000 REST API.
+You can use it as a library in your python project or you can explore the
+Grid5000 resources interactively using the embedded shell.")
+    (license license:gpl3+)))
diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 73d2954d23..5b0de9c8dc 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -127,6 +127,7 @@
 ;;; Copyright © 2022 Philip McGrath <philip@philipmcgrath.com>
 ;;; Copyright © 2022 Marek Felšöci <marek@felsoci.sk>
 ;;; Copyright © 2022 Hilton Chain <hako@ultrarare.space>
+;;; Copyright © 2022 Tomasz Jeneralczyk <tj@schwi.pl>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -8247,7 +8248,7 @@ procedures.")
      (substitute-keyword-arguments
          (package-arguments python-jaraco-context-bootstrap)
        ((#:tests? _ #f)
-        #t)
+        (not (%current-target-system)))
        ((#:phases phases #~%standard-phases)
         #~(modify-phases #$phases
             (replace 'check
@@ -8298,7 +8299,7 @@ module with a few extra procedures.")
      (substitute-keyword-arguments
          (package-arguments python-jaraco-functools-bootstrap)
        ((#:tests? _ #f)
-        #t)
+        (not (%current-target-system)))
        ((#:phases phases #~%standard-phases)
         #~(modify-phases #$phases
             (replace 'check
@@ -8698,7 +8699,7 @@ installing @code{kernelspec}s for use with Jupyter frontends.")
       (arguments
        (substitute-keyword-arguments (package-arguments base)
          ((#:tests? _ #f)
-          #t)
+          (not (%current-target-system)))
          ((#:phases phases #~%standard-phases)
           #~(modify-phases #$phases
               (replace 'check
@@ -9681,7 +9682,7 @@ Python style, together with a fast and comfortable execution environment.")
                ;; because there are no AWS credentials.
                (delete-file "tests/test_tibanna.py")
                (invoke "pytest")))))))
-    (inputs
+    (propagated-inputs
      (list python-appdirs
            python-configargparse
            python-connection-pool
@@ -9732,15 +9733,14 @@ Python style, together with a fast and comfortable execution environment.")
          ;; For cluster execution Snakemake will call Python.  Since there is
          ;; no suitable GUIX_PYTHONPATH set, cluster execution will fail.  We
          ;; fix this by calling the snakemake wrapper instead.
-
-         ;; XXX: There is another instance of sys.executable on line 692, but
-         ;; it is not clear how to patch it.
          (add-after 'unpack 'call-wrapper-not-wrapped-snakemake
            (lambda* (#:key outputs #:allow-other-keys)
              (substitute* "snakemake/executors/__init__.py"
-               (("\\{sys.executable\\} -m snakemake")
-                (string-append (assoc-ref outputs "out")
-                               "/bin/snakemake")))))
+               (("self\\.get_python_executable\\(\\),")
+                "")
+               (("\"-m snakemake\"")
+                (string-append "\"" (assoc-ref outputs "out")
+                               "/bin/snakemake" "\"")))))
          (replace 'check
            (lambda* (#:key tests? #:allow-other-keys)
              (when tests?
@@ -9752,7 +9752,7 @@ Python style, together with a fast and comfortable execution environment.")
                ;; to the Google Storage service.
                (delete-file "tests/test_google_lifesciences.py")
                (invoke "pytest")))))))
-    (inputs
+    (propagated-inputs
      (list python-appdirs
            python-configargparse
            python-connection-pool
@@ -11298,7 +11298,7 @@ from an XML-based format.")
     (arguments
      (substitute-keyword-arguments (package-arguments python-fonttools)
        ((#:tests? _ #f)
-        #t)
+        (not (%current-target-system)))
        ((#:phases phases '%standard-phases)
         `(modify-phases ,phases
            (replace 'check
@@ -12375,7 +12375,7 @@ invoked on those path objects directly.")
      (substitute-keyword-arguments
          (package-arguments python-path-bootstrap)
        ((#:tests? _ #f)
-        #t)
+        (not (%current-target-system)))
        ((#:phases phases #~%standard-phases)
         #~(modify-phases #$phases
             (replace 'check
@@ -12498,7 +12498,7 @@ $ rm -rf /tmp/env
     (arguments
      (substitute-keyword-arguments (package-arguments python-pip-run-bootstrap)
        ((#:tests? _ #f)
-        #t)
+        (not (%current-target-system)))
        ((#:phases phases #~%standard-phases)
         #~(modify-phases #$phases
             (replace 'check
@@ -30424,6 +30424,68 @@ binary diff utility.  It also provides two command-line tools, @code{bsdiff4}
 and @code{bspatch4}.")
     (license license:bsd-2)))
 
+(define-public python-mpv
+  (package
+    (name "python-mpv")
+    (version "1.0.1")
+    (source
+     (origin
+       ;; python-mpv from pypi does not include the tests directory.
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/jaseg/python-mpv")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32
+         "10w6j3n62ap45sf6q487kz8z6g58sha37i14fa2hhng794z7a8jh"))
+       (modules '((guix build utils)))
+       (snippet
+        #~(begin
+            ;; One of the tests never completes, so neutering it using
+            ;; early return allows other test to run without issue.
+            (substitute* "tests/test_mpv.py"
+              ;; Note the typo in "prooperty" - this was fixed later in
+              ;; upstream but has no effect on whether the tests hangs or not.
+              (("test_wait_for_prooperty_event_overflow.*" line)
+               ;; The long whitespace between \n and return is to match the
+               ;; identation level, which is significant in python.
+               (string-append line "\n        return\n")))))))
+    (build-system python-build-system)
+    (arguments
+     (list #:phases
+           #~(modify-phases %standard-phases
+               (add-before 'build 'patch-reference-to-mpv
+                 (lambda* (#:key inputs #:allow-other-keys)
+                   ;; Without an absolute path it is not able find and
+                   ;; load the libmpv library.
+                   (substitute* "mpv.py"
+                     (("sofile = .*")
+                      (string-append "sofile = \""
+                                     (search-input-file inputs "/lib/libmpv.so")
+                                     "\"\n")))))
+               (add-before 'check 'prepare-for-tests
+                 (lambda _
+                   ;; Fontconfig throws errors when it has no cache dir to use.
+                   (setenv "XDG_CACHE_HOME" (getcwd))
+                   ;; Some tests fail without a writable and readable HOME.
+                   (setenv "HOME" (getcwd)))))))
+    (native-inputs
+     (list python-xvfbwrapper)) ; needed for tests only
+    (inputs (list mpv))
+    (propagated-inputs (list python-pillow)) ; for raw screenshots
+    (home-page "https://github.com/jaseg/python-mpv")
+    (synopsis "Python interface to the mpv media player")
+    (description
+     "python-mpv is a ctypes-based python interface to the mpv media player.
+It gives you more or less full control of all features of the player, just
+as the lua interface does.")
+    ;; From the project's README:
+    ;;  python-mpv inherits the underlying libmpv's license, which can be either
+    ;;  GPLv2 or later (default) or LGPLv2.1 or later.  For details, see the mpv
+    ;;  copyright page.
+    (license license:gpl2+)))
+
 (define-public python-biblib
   (let ((upstream-version "0.1.0")
         (commit "ab0e857b9198fe425ec9b02fcc293b5d9fd0c406")
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index 23407e4e84..6b571f6d12 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -388,7 +388,7 @@
            gdbm
            libffi ; for ctypes
            sqlite ; for sqlite extension
-           openssl
+           openssl-1.1
            readline
            zlib
            tcl
@@ -556,6 +556,9 @@ data types.")
                            (map cdr outputs)))))
            (replace 'install-sitecustomize.py
              ,(customize-site version))))))
+    (inputs
+     (modify-inputs (package-inputs python-2.7)
+       (replace "openssl" openssl)))
     (native-inputs
      `(("tzdata" ,tzdata-for-tests)
        ("unzip" ,unzip)
diff --git a/gnu/packages/ruby.scm b/gnu/packages/ruby.scm
index 4757c5d35b..6bc8f9e9a1 100644
--- a/gnu/packages/ruby.scm
+++ b/gnu/packages/ruby.scm
@@ -29,6 +29,7 @@
 ;;; Copyright © 2020 Tomás Ortín Fernández <tomasortin@mailbox.org>
 ;;; Copyright © 2021 Giovanni Biscuolo <g@xelera.eu>
 ;;; Copyright © 2022 Philip McGrath <philip@philipmcgrath.com>
+;;; Copyright © 2022 Remco van 't Veer <remco@remworks.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -100,7 +101,7 @@
 (define-public ruby-2.6
   (package
     (name "ruby")
-    (version "2.6.5")
+    (version "2.6.10")
     (source
      (origin
        (method url-fetch)
@@ -109,7 +110,7 @@
                            "/ruby-" version ".tar.xz"))
        (sha256
         (base32
-         "0qhsw2mr04f3lqinkh557msr35pb5rdaqy4vdxcj91flgxqxmmnm"))
+         "1wn12klc44hn2nh5v1lkqbdyvljip6qhwjqvkkf8zf112gaxxn2z"))
        (modules '((guix build utils)))
        (snippet `(begin
                    ;; Remove bundled libffi
@@ -137,7 +138,7 @@
                (("/bin/sh") (which "sh")))
              #t)))))
     (inputs
-     (list readline openssl libffi gdbm))
+     (list readline openssl-1.1 libffi gdbm))
     (propagated-inputs
      (list zlib))
     (native-search-paths
@@ -154,6 +155,7 @@ a focus on simplicity and productivity.")
   (package
     (inherit ruby-2.6)
     (version "2.7.4")
+    (replacement ruby-2.7-fixed) ; security fixes
     (source
      (origin
        (inherit (package-source ruby-2.6))
@@ -188,24 +190,24 @@ a focus on simplicity and productivity.")
     (native-inputs
      (list autoconf))))
 
-(define-public ruby-3.0
+(define ruby-2.7-fixed
   (package
     (inherit ruby-2.7)
-    (version "3.0.2")
+    (version "2.7.6")
     (source
      (origin
-       (method url-fetch)
-       (uri (string-append "http://cache.ruby-lang.org/pub/ruby/"
+       (inherit (package-source ruby-2.7))
+       (uri (string-append "https://cache.ruby-lang.org/pub/ruby/"
                            (version-major+minor version)
-                           "/ruby-" version ".tar.xz"))
+                           "/ruby-" version ".tar.gz"))
        (sha256
         (base32
-         "0h2w2ms4gx2s96v3lzdr3add94bd2qqkhdjzaycmaqhg21rpf3jp"))))))
+         "042xrdk7hsv4072bayz3f8ffqh61i8zlhvck10nfshllq063n877"))))))
 
-(define-public ruby-3.1
+(define-public ruby-3.0
   (package
     (inherit ruby-2.7)
-    (version "3.1.1")
+    (version "3.0.4")
     (source
      (origin
        (method url-fetch)
@@ -214,26 +216,15 @@ a focus on simplicity and productivity.")
                            "/ruby-" version ".tar.xz"))
        (sha256
         (base32
-         "1akcl7vhmwfm6ybj7493kzy58ykh2r39ri9f4xfm2xmhg1msmvvs"))))))
-
-(define-public ruby-2.5
-  (package
-    (inherit ruby-2.6)
-    (version "2.5.9")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (string-append "http://cache.ruby-lang.org/pub/ruby/"
-                           (version-major+minor version)
-                           "/ruby-" version ".tar.xz"))
-       (sha256
-        (base32
-         "1w2qncacm7h3f3il1whghdabwnv9fvwmz9f1a9vcg32006ljyzx8"))))))
+         "1w7jpq3flnm007z5kj8kixgm8l4smb80w8ak4993a12j0irzq8lf"))))
+    (inputs
+     (modify-inputs (package-inputs ruby-2.7)
+       (replace "openssl" openssl)))))
 
-(define-public ruby-2.4
+(define-public ruby-3.1
   (package
-    (inherit ruby-2.6)
-    (version "2.4.10")
+    (inherit ruby-3.0)
+    (version "3.1.2")
     (source
      (origin
        (method url-fetch)
@@ -242,12 +233,7 @@ a focus on simplicity and productivity.")
                            "/ruby-" version ".tar.xz"))
        (sha256
         (base32
-         "1prhqlgik1zmw9lakl6hkriqslspw48pvhxff17h7ns42p8qwrnm"))
-       (modules '((guix build utils)))
-       (snippet `(begin
-                   ;; Remove bundled libffi
-                   (delete-file-recursively "ext/fiddle/libffi-3.2.1")
-                   #t))))))
+         "0amzqczgvr51ilcqfgw0n41hrfanzi0wh8k6am3x5dm1z0bx046a"))))))
 
 (define-public ruby ruby-2.7)
 
@@ -7203,7 +7189,8 @@ run.")
     (arguments
      `(#:test-target "default"
        ;; TODO: Figure out why test hangs.
-       #:tests? ,(not (target-riscv64?))
+       #:tests? ,(not (or (%current-target-system)
+                          (target-riscv64?)))
        #:phases
        (modify-phases %standard-phases
          (add-before 'check 'set-home
diff --git a/gnu/packages/rust.scm b/gnu/packages/rust.scm
index 9d70232cff..f53c69e4f2 100644
--- a/gnu/packages/rust.scm
+++ b/gnu/packages/rust.scm
@@ -594,7 +594,7 @@ safety and thread safety guarantees.")
       (arguments
        (substitute-keyword-arguments (package-arguments base-rust)
          ((#:tests? _ #f)
-          #t)
+          (not (%current-target-system)))
          ((#:phases phases)
           `(modify-phases ,phases
              (add-after 'unpack 'relax-gdb-auto-load-safe-path
diff --git a/gnu/packages/tls.scm b/gnu/packages/tls.scm
index 4ee75ace3d..7f61bd790b 100644
--- a/gnu/packages/tls.scm
+++ b/gnu/packages/tls.scm
@@ -415,7 +415,7 @@ OpenSSL for TARGET."
                (error "unsupported openssl target architecture")))))
         (string-append kernel "-" arch))))
 
-(define-public openssl
+(define-public openssl-1.1
   (package
     (name "openssl")
     (version "1.1.1l")
@@ -545,7 +545,7 @@ OpenSSL for TARGET."
 
 (define openssl/fixed
   (package
-    (inherit openssl)
+    (inherit openssl-1.1)
     (name "openssl")
     (version "1.1.1q")
     (source (origin
@@ -564,7 +564,7 @@ OpenSSL for TARGET."
 
 (define-public openssl-3.0
   (package
-    (inherit openssl)
+    (inherit openssl-1.1)
     (version "3.0.5")
     (source (origin
               (method url-fetch)
@@ -580,7 +580,7 @@ OpenSSL for TARGET."
                (base32
                 "0yja085lygkdxbf4k4rckkj9r24p8dgix8avqljnbbbixydqszda"))))
     (arguments
-     (substitute-keyword-arguments (package-arguments openssl)
+     (substitute-keyword-arguments (package-arguments openssl-1.1)
        ((#:phases phases '%standard-phases)
         #~(modify-phases #$phases
             (add-before 'configure 'configure-perl
@@ -590,6 +590,8 @@ OpenSSL for TARGET."
                                            "/bin/perl"))))))))
     (license license:asl2.0)))
 
+(define-public openssl openssl-1.1)
+
 (define-public bearssl
   (package
     (name "bearssl")
diff --git a/gnu/packages/toys.scm b/gnu/packages/toys.scm
index fb2f367490..8967c0c25b 100644
--- a/gnu/packages/toys.scm
+++ b/gnu/packages/toys.scm
@@ -2,7 +2,7 @@
 ;;; Copyright © 2017, 2018, 2020–2022 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2019 Jesse Gibbons <jgibbons2357+guix@gmail.com>
 ;;; Copyright © 2019, 2020, 2021 Timotej Lazar <timotej.lazar@araneo.si>
-;;; Copyright © 2019 Liliana Marie Prikler <liliana.prikler@gmail.com>
+;;; Copyright © 2019, 2022 Liliana Marie Prikler <liliana.prikler@gmail.com>
 ;;; Copyright © 2020 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2021 Leo Famulari <leo@famulari.name>
 ;;;
@@ -23,22 +23,119 @@
 
 (define-module (gnu packages toys)
   #:use-module (gnu packages)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages bash)
   #:use-module (gnu packages bison)
   #:use-module (gnu packages flex)
   #:use-module (gnu packages gtk)
   #:use-module (gnu packages man)
+  #:use-module (gnu packages multiprecision)
   #:use-module (gnu packages ncurses)
   #:use-module (gnu packages perl)
+  #:use-module (gnu packages pretty-print)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages xml)
   #:use-module (gnu packages xorg)
   #:use-module (guix build-system gnu)
+  #:use-module (guix build-system copy)
+  #:use-module (guix build-system meson)
   #:use-module (guix download)
+  #:use-module (guix gexp)
   #:use-module (guix git-download)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
   #:use-module (guix utils))
 
+(define-public daikichi
+  (package
+    (name "daikichi")
+    (version "0.3.0")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://gitlab.com/lilyp/daikichi")
+                    (commit version)))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "1y35f1qpxl743s0s83dg5ivkvprv19mqn0azm14k3y8pmp6cs52z"))))
+    (build-system meson-build-system)
+    (arguments
+     (list #:phases
+           #~(modify-phases %standard-phases
+               (add-after 'unpack 'hard-code-test-paths
+                 (lambda* (#:key inputs #:allow-other-keys)
+                   (substitute* (list "test-dat.in" "test-strings.in")
+                     (("(basename|cmp|diff|mktemp|rm|sed|seq)" cmd)
+                      (search-input-file inputs
+                                         (string-append "bin/" cmd)))))))))
+    (inputs (list bash-minimal coreutils sed
+                  fmt gmp))
+    (native-inputs (list pkg-config))
+    (home-page "https://gitlab.com/lilyp/daikichi")
+    (synopsis "Display random fortunes")
+    (description "Daikichi is an alternative implementation of
+@command{fortune}, which displays random quotes from a database.
+This package provides just the utilities and no quotes.")
+    (license license:gpl3+)
+    (native-search-paths
+     (list (search-path-specification
+            (variable "DAIKICHI_FORTUNE_PATH")
+            (files '("share/fortunes")))))))
+
+(define-public fortunes-jkirchartz
+  ;; No public release.
+  ;; Note to updaters: Please ensure that new quotes do not bring harm
+  ;; rather than fortune.
+  (let ((commit "2e32ba0a57e3842dc06c8128d880ab4c8ec3aefc")
+        (revision "0"))
+    (package
+      (name "fortunes-jkirchartz")
+      (version (git-version "0" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/JKirchartz/fortunes")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32
+                  "1ym4ldzww5yfd76q7zvhi491bqlykfjnc215bqx1cbj0c8ndb2l4"))
+                (snippet
+                 #~(for-each delete-file
+                             ;; incompatible license
+                             '("BibleAbridged")))))
+      (build-system copy-build-system)
+      (native-inputs (list daikichi gnu-make))
+      (arguments
+       (list #:install-plan
+             #~`(("." "share/fortunes" #:include-regexp ("\\.dat$")))
+             #:phases
+             #~(modify-phases %standard-phases
+                 (add-after 'unpack 'patch-source
+                   (lambda* (#:key inputs native-inputs #:allow-other-keys)
+                     (substitute* "showerthoughts"
+                       (("&lt;") "<")
+                       (("&gt;") ">")
+                       (("&amp;") "&"))
+                     (substitute* "Makefile"
+                       (("strfile") "daikichi pack"))))
+                 (add-before 'install 'build
+                   (lambda _
+                     (invoke "make")))
+                 (add-after 'build 'check
+                   (lambda* (#:key inputs tests? #:allow-other-keys)
+                     (when tests?
+                       (apply
+                        invoke
+                        (search-input-file inputs "libexec/daikichi/test-dat")
+                        (find-files "." "\\.dat$"))))))))
+      (home-page "https://github.com/JKirchartz/fortunes")
+      (synopsis "Collection of fortunes")
+      (description "This package contains a large collection of quotes to
+display via @command{fortune}, drawn from sources all around the world.")
+      (license license:unlicense))))
+
 (define-public lolcat
   (let ((commit "35dca3d0a381496d7195cd78f5b24aa7b62f2154")
         (revision "0"))
diff --git a/gnu/packages/version-control.scm b/gnu/packages/version-control.scm
index 277ea2835b..cd84dfd0cc 100644
--- a/gnu/packages/version-control.scm
+++ b/gnu/packages/version-control.scm
@@ -1735,15 +1735,16 @@ execution of any hook written in any language before every commit.")
 (define-public mercurial
   (package
     (name "mercurial")
-    (version "5.8.1")
+    (version "6.2.1")
     (source (origin
              (method url-fetch)
              (uri (string-append "https://www.mercurial-scm.org/"
                                  "release/mercurial-" version ".tar.gz"))
-             (patches (search-patches "mercurial-hg-extension-path.patch"))
+             (patches (search-patches "mercurial-hg-extension-path.patch"
+                                      "mercurial-openssl-compat.patch"))
              (sha256
               (base32
-               "16xi4bmjqzi7ig8sfa5mnypfpbbbiyafmmqrs4nxmgc743za7fl1"))))
+               "1nl2726szaxyrxlyssrsir5c6vb4ci0i6g969i6xaahw1nidgica"))))
     (build-system gnu-build-system)
     (arguments
      `(#:make-flags
@@ -1753,13 +1754,11 @@ execution of any hook written in any language before every commit.")
          (delete 'configure)
          (add-after 'unpack 'patch-tests
            (lambda _
-             (substitute* '("tests/test-extdiff.t"
-                            "tests/test-logtoprocess.t"
-                            "tests/test-patchbomb.t"
-                            "tests/test-run-tests.t"
-                            "tests/test-transplant.t")
+             (substitute* (find-files "tests" "\\.(t|py)$")
                (("/bin/sh")
-                (which "sh")))))
+                (which "sh"))
+               (("/usr/bin/env")
+                (which "env")))))
          (replace 'check
            (lambda* (#:key tests? #:allow-other-keys)
              (with-directory-excursion "tests"
@@ -1770,6 +1769,12 @@ execution of any hook written in any language before every commit.")
                            ;; PATH from before (that's why we are building it!)?
                            "test-hghave.t"
 
+                           ;; This test creates a shebang spanning multiple
+                           ;; lines which is difficult to substitute.  It
+                           ;; only tests the test runner itself, which gets
+                           ;; thoroughly tested during the check phase anyway.
+                           "test-run-tests.t"
+
                            ;; These tests fail because the program is not
                            ;; connected to a TTY in the build container.
                            "test-nointerrupt.t"
@@ -1778,6 +1783,15 @@ execution of any hook written in any language before every commit.")
                            ;; FIXME: This gets killed but does not receive an interrupt.
                            "test-commandserver.t"
 
+                           ;; These tests get unexpected warnings about using
+                           ;; deprecated functionality in Python, but otherwise
+                           ;; succeed; try enabling for later Mercurial versions.
+                           "test-demandimport.py"
+                           "test-patchbomb-tls.t"
+                           ;; Similarly, this gets a more informative error
+                           ;; message from Python 3.10 than it expects.
+                           "test-http-bad-server.t"
+
                            ;; Only works when run in a hg-repo, not in an
                            ;; extracted tarball
                            "test-doctest.py"
@@ -1808,7 +1822,7 @@ execution of any hook written in any language before every commit.")
            ;; The following inputs are only needed to run the tests.
            python-nose unzip which))
     (inputs
-     (list python))
+     (list python-wrapper))
     ;; Find third-party extensions.
     (native-search-paths
      (list (search-path-specification
diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index 1e2bbd221a..585f4c9af9 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -2497,7 +2497,7 @@ YouTube.com and many more sites.")
         (base32 "07qz1zdndlpki0asw35zk5hdjcwpl3n1g54nxg4yb1iykbyv7rll"))))
     (arguments
      (substitute-keyword-arguments (package-arguments youtube-dl)
-       ((#:tests? _) #t)
+       ((#:tests? _) (not (%current-target-system)))
        ((#:phases phases)
         #~(modify-phases #$phases
             ;; See the comment for the corresponding phase in youtube-dl.
diff --git a/gnu/packages/vim.scm b/gnu/packages/vim.scm
index a07c681cb3..f19b47c50d 100644
--- a/gnu/packages/vim.scm
+++ b/gnu/packages/vim.scm
@@ -77,7 +77,7 @@
 (define-public vim
   (package
     (name "vim")
-    (version "9.0.0235")
+    (version "9.0.0325")
     (source (origin
              (method git-fetch)
              (uri (git-reference
@@ -86,7 +86,7 @@
              (file-name (git-file-name name version))
              (sha256
               (base32
-               "1fshlggcq1fw4cbsgmagwxkmdiwv2cla0vds383z49ayqgqnamnj"))))
+               "18m3lhp7d8a0n3bx0kqn082gqrh7lyar1ndvwq79gj73fz5c19vh"))))
     (build-system gnu-build-system)
     (arguments
      `(#:test-target "test"
diff --git a/gnu/packages/virtualization.scm b/gnu/packages/virtualization.scm
index d451b8529e..73e6f89166 100644
--- a/gnu/packages/virtualization.scm
+++ b/gnu/packages/virtualization.scm
@@ -14,7 +14,7 @@
 ;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
 ;;; Copyright © 2020, 2021 Brice Waegeneire <brice@waegenei.re>
 ;;; Copyright © 2020 Mathieu Othacehe <m.othacehe@gmail.com>
-;;; Copyright © 2020, 2021 Marius Bakke <mbakke@fastmail.com>
+;;; Copyright © 2020, 2021, 2022 Marius Bakke <marius@gnu.org>
 ;;; Copyright © 2020, 2021, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2020 Brett Gilio <brettg@gnu.org>
 ;;; Copyright © 2021 Leo Famulari <leo@famulari.name>
@@ -1311,9 +1311,16 @@ pretty simple, REST API.")
               (substitute* "scripts/meson-install-dirs.py"
                 (("destdir = .*")
                  "destdir = '/tmp'"))))
+          (add-after 'unpack 'use-absolute-dnsmasq
+            (lambda* (#:key inputs #:allow-other-keys)
+              (let ((dnsmasq (search-input-file inputs "sbin/dnsmasq")))
+                (substitute* "src/util/virdnsmasq.c"
+                  (("#define DNSMASQ \"dnsmasq\"")
+                   (string-append "#define DNSMASQ \"" dnsmasq "\""))))))
           (add-before 'configure 'disable-broken-tests
             (lambda _
               (let ((tests (list "commandtest"         ; hangs idly
+                                 "networkxml2conftest" ; fails with absolute dnsmasq
                                  "qemuxml2argvtest"    ; fails
                                  "virnetsockettest"))) ; tries to network
                 (substitute* "tests/meson.build"
diff --git a/gnu/services.scm b/gnu/services.scm
index cc2540ee50..2abef557d4 100644
--- a/gnu/services.scm
+++ b/gnu/services.scm
@@ -482,11 +482,8 @@ configuration being used."
 (define (provenance-entry config-file)
   "Return system entries describing the operating system provenance: the
 channels in use and CONFIG-FILE, if it is true."
-  (define profile
-    (current-profile))
-
   (define channels
-    (and=> profile profile-channels))
+    (current-channels))
 
   (mbegin %store-monad
     (let ((config-file (cond ((string? config-file)
diff --git a/gnu/services/lightdm.scm b/gnu/services/lightdm.scm
new file mode 100644
index 0000000000..07f2e808dd
--- /dev/null
+++ b/gnu/services/lightdm.scm
@@ -0,0 +1,687 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019, 2020 L  p R n  d n <guix@lprndn.info>
+;;; Copyright © 2020 Ricardo Wurmus <rekado@elephly.net>
+;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu services lightdm)
+  #:use-module (gnu artwork)
+  #:use-module (gnu packages admin)
+  #:use-module (gnu packages display-managers)
+  #:use-module (gnu packages freedesktop)
+  #:use-module (gnu packages gnome)
+  #:use-module (gnu packages vnc)
+  #:use-module (gnu packages xorg)
+  #:use-module (gnu services configuration)
+  #:use-module (gnu services dbus)
+  #:use-module (gnu services desktop)
+  #:use-module (gnu services shepherd)
+  #:use-module (gnu services xorg)
+  #:use-module (gnu services)
+  #:use-module (gnu system pam)
+  #:use-module (gnu system shadow)
+  #:use-module (guix diagnostics)
+  #:use-module (guix gexp)
+  #:use-module (guix i18n)
+  #:use-module (guix records)
+  #:use-module (ice-9 format)
+  #:use-module (ice-9 match)
+  #:use-module (oop goops)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26)
+  #:export (lightdm-seat-configuration
+            lightdm-seat-configuration?
+            lightdm-seat-configuration-name
+            lightdm-seat-configuration-type
+            lightdm-seat-configuration-user-session
+            lightdm-seat-configuration-autologin-user
+            lightdm-seat-configuration-greeter-session
+            lightdm-seat-configuration-xserver-command
+            lightdm-seat-configuration-session-wrapper
+            lightdm-seat-configuration-extra-config
+
+            lightdm-gtk-greeter-configuration
+            lightdm-gtk-greeter-configuration?
+            lightdm-gtk-greeter-configuration-lightdm-gtk-greeter
+            lightdm-gtk-greeter-configuration-assets
+            lightdm-gtk-greeter-configuration-theme-name
+            lightdm-gtk-greeter-configuration-icon-theme-name
+            lightdm-gtk-greeter-configuration-cursor-theme-name
+            lightdm-gtk-greeter-configuration-allow-debug
+            lightdm-gtk-greeter-configuration-background
+            lightdm-gtk-greeter-configuration-a11y-states
+            lightdm-gtk-greeter-configuration-reader
+            lightdm-gtk-greeter-configuration-extra-config
+
+            lightdm-configuration
+            lightdm-configuration?
+            lightdm-configuration-lightdm
+            lightdm-configuration-allow-empty-passwords?
+            lightdm-configuration-xorg-configuration
+            lightdm-configuration-greeters
+            lightdm-configuration-seats
+            lightdm-configuration-xdmcp?
+            lightdm-configuration-xdmcp-listen-address
+            lightdm-configuration-vnc-server?
+            lightdm-configuration-vnc-server-command
+            lightdm-configuration-vnc-server-listen-address
+            lightdm-configuration-vnc-server-port
+            lightdm-configuration-extra-config
+
+            lightdm-service-type))
+
+;;;
+;;; Greeters.
+;;;
+
+(define list-of-file-likes?
+  (list-of file-like?))
+
+(define %a11y-states '(contrast font keyboard reader))
+
+(define (a11y-state? value)
+  (memq value %a11y-states))
+
+(define list-of-a11y-states?
+  (list-of a11y-state?))
+
+(define-maybe boolean)
+
+(define (serialize-boolean name value)
+  (define (strip-trailing-? name)
+    ;; field? -> field
+    (let ((str (symbol->string name)))
+      (if (string-suffix? "?" str)
+          (string-drop-right str 1)
+          str)))
+  (format #f "~a=~:[false~;true~]~%" (strip-trailing-? name) value))
+
+(define-maybe file-like)
+
+(define (serialize-file-like name value)
+  #~(format #f "~a=~a~%" '#$name #$value))
+
+(define (serialize-list-of-a11y-states name value)
+  (format #f "~a=~a~%" name (string-join (map symbol->string value) ";")))
+
+(define (serialize-string name value)
+  (format #f "~a=~a~%" name value))
+
+(define (serialize-number name value)
+  (format #f "~a=~a~%" name value))
+
+(define (serialize-list-of-strings _ value)
+  (string-join value "\n"))
+
+(define-configuration lightdm-gtk-greeter-configuration
+  (lightdm-gtk-greeter
+   (file-like lightdm-gtk-greeter)
+   "The lightdm-gtk-greeter package to use."
+   empty-serializer)
+  (assets
+   (list-of-file-likes (list adwaita-icon-theme
+                             gnome-themes-extra
+                             ;; FIXME: hicolor-icon-theme should be in the
+                             ;; packages of the desktop templates.
+                             hicolor-icon-theme))
+   "The list of packages complementing the greeter, such as package providing
+icon themes."
+   empty-serializer)
+  (theme-name
+   (string "Adwaita")
+   "The name of the theme to use.")
+  (icon-theme-name
+   (string "Adwaita")
+   "The name of the icon theme to use.")
+  (cursor-theme-name
+   (string "Adwaita")
+   "The name of the cursor theme to use.")
+  (cursor-theme-size
+   (number 16)
+   "The size to use for the the cursor theme.")
+  (allow-debugging?
+   maybe-boolean
+   "Set to #t to enable debug log level.")
+  (background
+   (file-like (file-append %artwork-repository
+                           "/backgrounds/guix-checkered-16-9.svg"))
+   "The background image to use.")
+  ;; FIXME: This should be enabled by default, but it currently doesn't work,
+  ;; failing to connect to D-Bus, causing the login to fail.
+  (at-spi-enabled?
+   (boolean #f)
+   "Enable accessibility support through the Assistive Technology Service
+Provider Interface (AT-SPI).")
+  (a11y-states
+   (list-of-a11y-states %a11y-states)
+   "The accessibility features to enable, given as list of symbols.")
+  (reader
+   maybe-file-like
+   "The command to use to launch a screen reader.")
+  (extra-config
+   (list-of-strings '())
+   "Extra configuration values to append to the LightDM GTK Greeter
+configuration file."))
+
+(define (strip-class-name-brackets name)
+  "Remove the '<<' and '>>' brackets from NAME, a symbol."
+  (let ((name* (symbol->string name)))
+    (if (and (string-prefix? "<<" name*)
+             (string-suffix? ">>" name*))
+        (string->symbol (string-drop (string-drop-right name* 2) 2))
+        (error "unexpected class name" name*))))
+
+(define (config->name config)
+  "Return the constructor name (a symbol) from CONFIG."
+  (strip-class-name-brackets (class-name (class-of config))))
+
+(define (greeter-configuration->greeter-fields config)
+  "Return the fields of CONFIG, a greeter configuration."
+  (match config
+    ;; Note: register any new greeter configuration here.
+    ((? lightdm-gtk-greeter-configuration?)
+     lightdm-gtk-greeter-configuration-fields)))
+
+(define (greeter-configuration->packages config)
+  "Return the list of greeter packages, including assets, used by CONFIG, a
+greeter configuration."
+  (match config
+    ;; Note: register any new greeter configuration here.
+    ((? lightdm-gtk-greeter-configuration?)
+     (cons (lightdm-gtk-greeter-configuration-lightdm-gtk-greeter config)
+           (lightdm-gtk-greeter-configuration-assets config)))))
+
+;;; TODO: Implement directly in (gnu services configuration), perhaps by
+;;; making the FIELDS argument optional.
+(define (serialize-configuration* config)
+  "Like `serialize-configuration', but not requiring to provide a FIELDS
+argument."
+  (define fields (greeter-configuration->greeter-fields config))
+  (serialize-configuration config fields))
+
+(define (greeter-configuration->conf-name config)
+  "Return the file name of CONFIG, a greeter configuration."
+  (format #f "~a.conf" (greeter-configuration->greeter-session config)))
+
+(define (greeter-configuration->file config)
+  "Serialize CONFIG into a file under the output directory, so that it can be
+easily added to XDG_CONF_DIRS."
+  (computed-file
+   (greeter-configuration->conf-name config)
+   #~(begin
+       (call-with-output-file #$output
+         (lambda (port)
+           (format port (string-append
+                         "[greeter]\n"
+                         #$(serialize-configuration* config))))))))
+
+
+;;;
+;;; Seats.
+;;;
+
+(define seat-name? string?)
+
+(define (serialize-seat-name _ value)
+  (format #f "[Seat:~a]~%" value))
+
+(define (seat-type? type)
+  (memq type '(local xremote)))
+
+(define (serialize-seat-type name value)
+  (format #f "~a=~a~%" name value))
+
+(define-maybe seat-type)
+
+(define (greeter-session? value)
+  (memq value '(lightdm-gtk-greeter)))
+
+(define (serialize-greeter-session name value)
+  (format #f "~a=~a~%" name value))
+
+(define-maybe greeter-session)
+
+(define-maybe string)
+
+;;; Note: all the fields except for the seat name should be 'maybe's, since
+;;; the real default value is set by the %lightdm-seat-default define later,
+;;; and this avoids repeating ourselves in the serialized configuration file.
+(define-configuration lightdm-seat-configuration
+  (name
+   seat-name
+   "The name of the seat.  An asterisk (*) can be used in the name
+to apply the seat configuration to all the seat names it matches.")
+  (user-session
+   maybe-string
+   "The session to use by default.  The session name must be provided as a
+lowercase string, such as @code{\"gnome\"}, @code{\"ratpoison\"}, etc.")
+  (type
+   (seat-type 'local)
+   "The type of the seat, either the @code{local} or @code{xremote} symbol.")
+  (autologin-user
+   maybe-string
+   "The username to automatically log in with by default.")
+  (greeter-session
+   (greeter-session 'lightdm-gtk-greeter)
+   "The greeter session to use, specified as a symbol.  Currently, only
+@code{lightdm-gtk-greeter} is supported.")
+  ;; Note: xserver-command must be lazily computed, so that it can be
+  ;; overridden via 'lightdm-configuration-xorg-configuration'.
+  (xserver-command
+   maybe-file-like
+   "The Xorg server command to run.")
+  (session-wrapper
+   (file-like (xinitrc))
+   "The xinitrc session wrapper to use.")
+  (extra-config
+   (list-of-strings '())
+   "Extra configuration values to append to the seat configuration section."))
+
+(define (greeter-session->greater-configuration-pred identifier)
+  "Return the predicate to check if a configuration is of the type specifying
+a greeter identified by IDENTIFIER."
+  (match identifier
+    ;; Note: register any new greeter identifier here.
+    ('lightdm-gtk-greeter
+     lightdm-gtk-greeter-configuration?)))
+
+(define (greeter-configuration->greeter-session config)
+  "Given CONFIG, a greeter configuration object, return its identifier,
+a symbol."
+  (let ((suffix "-configuration")
+        (greeter-conf-name (config->name config)))
+    (string->symbol (string-drop-right (symbol->string greeter-conf-name)
+                                       (string-length suffix)))))
+
+(define list-of-seat-configurations?
+  (list-of lightdm-seat-configuration?))
+
+
+;;;
+;;; LightDM.
+;;;
+
+(define (greeter-configuration? config)
+  (or (lightdm-gtk-greeter-configuration? config)
+      ;; Note: register any new greeter configuration here.
+      ))
+
+(define (list-of-greeter-configurations? greeter-configs)
+  (and ((list-of greeter-configuration?) greeter-configs)
+       ;; Greeter configurations must also not be provided more than once.
+       (let* ((types (map (cut (compose class-name class-of) <>)
+                          greeter-configs))
+              (dupes (filter (lambda (type)
+                               (< 1 (count (cut eq? type <>) types)))
+                             types)))
+         (unless (null? dupes)
+           (leave (G_ "duplicate greeter configurations: ~a~%") dupes)))))
+
+(define-configuration/no-serialization lightdm-configuration
+  (lightdm
+   (file-like lightdm)
+   "The lightdm package to use.")
+  (allow-empty-passwords?
+   (boolean #f)
+   "Whether users not having a password set can login.")
+  (debug?
+   (boolean #f)
+   "Enable verbose output.")
+  (xorg-configuration
+   (xorg-configuration (xorg-configuration))
+   "The default Xorg server configuration to use to generate the Xorg server
+start script.  It can be refined per seat via the @code{xserver-command} of
+the @code{<lightdm-seat-configuration>} record, if desired.")
+  (greeters
+   (list-of-greeter-configurations (list (lightdm-gtk-greeter-configuration)))
+   "The LightDM greeter configurations specifying the greeters to use.")
+  (seats
+   (list-of-seat-configurations (list (lightdm-seat-configuration
+                                       (name "*"))))
+   "The seat configurations to use.  A LightDM seat is akin to a user.")
+  (xdmcp?
+   (boolean #f)
+   "Whether a XDMCP server should listen on port UDP 177.")
+  (xdmcp-listen-address
+   maybe-string
+   "The host or IP address the XDMCP server listens for incoming connections.
+When unspecified, listen on for any hosts/IP addresses.")
+  (vnc-server?
+   (boolean #f)
+   "Whether a VNC server is started.")
+  (vnc-server-command
+   (file-like (file-append tigervnc-server "bin/Xvnc"))
+   "The Xvnc command to use for the VNC server, it's possible to provide extra
+options not otherwise exposed along the command, for example to disable
+security:
+@lisp
+(vnc-server-command
+ (file-append tigervnc-server \"/bin/Xvnc\"
+             \" -SecurityTypes None\" ))
+@end lisp
+
+Or to set a PasswordFile for the classic (unsecure) VncAuth mecanism:
+@lisp
+(vnc-server-command
+ (file-append tigervnc-server \"/bin/Xvnc\"
+             \" -PasswordFile /var/lib/lightdm/.vnc/passwd\"))
+@end lisp
+The password file should be manually created using the @command{vncpasswd}
+command.
+
+Note that LightDM will create new sessions for VNC users, which means they
+need to authenticate in the same way as local users would.
+")
+  (vnc-server-listen-address
+   maybe-string
+   "The host or IP address the VNC server listens for incoming connections.
+When unspecified, listen for any hosts/IP addresses.")
+  (vnc-server-port
+   (number 5900)
+   "The TCP port the VNC server should listen to.")
+  (extra-config
+   (list-of-strings '())
+   "Extra configuration values to append to the LightDM configuration file."))
+
+(define (lightdm-configuration->greeters-config-dir config)
+  "Return a directory containing all the serialized greeter configurations
+from CONFIG, a <lightdm-configuration> object."
+  (file-union "etc-lightdm"
+              (append-map (lambda (g)
+                            `((,(greeter-configuration->conf-name g)
+                               ,(greeter-configuration->file g))))
+                          (lightdm-configuration-greeters config))))
+
+(define (lightdm-configuration->packages config)
+  "Return all the greeter packages and their assets defined in CONFIG, a
+<lightdm-configuration> object, as well as the lightdm package itself."
+  (cons (lightdm-configuration-lightdm config)
+        (append-map greeter-configuration->packages
+                    (lightdm-configuration-greeters config))))
+
+(define (validate-lightdm-configuration config)
+  "Sanity check CONFIG, a <lightdm-configuration> record instance."
+  ;; This is required to make inter-field validations, such as between the
+  ;; seats and greeters.
+  (let* ((seats (lightdm-configuration-seats config))
+         (greeter-sessions (delete-duplicates
+                            (map lightdm-seat-configuration-greeter-session
+                                 seats)
+                            eq?))
+         (greeter-configurations (lightdm-configuration-greeters config))
+         (missing-greeters
+          (filter-map
+           (lambda (id)
+             (define pred (greeter-session->greater-configuration-pred id))
+             (if (find pred greeter-configurations)
+                 #f                     ;happy path
+                 id))
+           greeter-sessions)))
+    (unless (null? missing-greeters)
+      (leave (G_ "no greeter configured for seat greeter sessions: ~a~%")
+             missing-greeters))))
+
+(define (lightdm-configuration-file config)
+  (match-record config <lightdm-configuration>
+    (xorg-configuration seats
+     xdmcp? xdmcp-listen-address
+     vnc-server? vnc-server-command vnc-server-listen-address vnc-server-port
+     extra-config)
+    (apply
+     mixed-text-file
+     "lightdm.conf" "
+#
+# General configuration
+#
+[LightDM]
+greeter-user=lightdm
+sessions-directory=/run/current-system/profile/share/xsessions\
+:/run/current-system/profile/share/wayland-sessions
+remote-sessions-directory=/run/current-system/profile/share/remote-sessions
+"
+     #~(string-join '#$extra-config "\n")
+     "
+#
+# XDMCP Server configuration
+#
+[XDMCPServer]
+enabled=" (if xdmcp? "true" "false") "\n"
+(if (maybe-value-set? xdmcp-listen-address)
+    (format #f "xdmcp-listen-address=~a" xdmcp-listen-address)
+    "") "
+
+#
+# VNC Server configuration
+#
+[VNCServer]
+enabled=" (if vnc-server? "true" "false") "
+command=" vnc-server-command "
+port=" (number->string vnc-server-port) "\n"
+(if (maybe-value-set? vnc-server-listen-address)
+    (format #f "vnc-server-listen-address=~a" vnc-server-listen-address)
+    "") "
+
+#
+# Seat configuration.
+#
+"
+     (map (lambda (seat)
+            ;; This complication exists to propagate a default value for
+            ;; the 'xserver-command' field of the seats.  Having a
+            ;; 'xorg-configuration' field at the root of the
+            ;; lightdm-configuration enables the use of
+            ;; 'set-xorg-configuration' and can be more convenient.
+            (let ((seat* (if (maybe-value-set?
+                              (lightdm-seat-configuration-xserver-command seat))
+                             seat
+                             (lightdm-seat-configuration
+                              (inherit seat)
+                              (xserver-command (xorg-start-command
+                                                xorg-configuration))))))
+              (serialize-configuration seat*
+                                       lightdm-seat-configuration-fields)))
+          seats))))
+
+(define %lightdm-accounts
+  (list (user-group (name "lightdm") (system? #t))
+        (user-account
+         (name "lightdm")
+         (group "lightdm")
+         (system? #t)
+         (comment "LightDM user")
+         (home-directory "/var/lib/lightdm")
+         (shell (file-append shadow "/sbin/nologin")))))
+
+(define %lightdm-activation
+  ;; Ensure /var/lib/lightdm is owned by the "lightdm" user.  Adapted from the
+  ;; %gdm-activation.
+  (with-imported-modules '((guix build utils))
+    #~(begin
+        (use-modules (guix build utils))
+
+        (define (ensure-ownership directory)
+          (let* ((lightdm (getpwnam "lightdm"))
+                 (uid (passwd:uid lightdm))
+                 (gid (passwd:gid lightdm))
+                 (st  (stat directory #f)))
+            ;; Recurse into directory only if it has wrong ownership.
+            (when (and st
+                       (or (not (= uid (stat:uid st)))
+                           (not (= gid (stat:gid st)))))
+              (for-each (lambda (file)
+                          (chown file uid gid))
+                        (find-files "directory"
+                                    #:directories? #t)))))
+
+        (when (not (stat "/var/lib/lightdm-data" #f))
+          (mkdir-p "/var/lib/lightdm-data"))
+        (for-each ensure-ownership
+                  '("/var/lib/lightdm"
+                    "/var/lib/lightdm-data")))))
+
+(define (lightdm-pam-service config)
+  "Return a PAM service for @command{lightdm}."
+  (unix-pam-service "lightdm"
+                    #:login-uid? #t
+                    #:allow-empty-passwords?
+                    (lightdm-configuration-allow-empty-passwords? config)))
+
+(define (lightdm-greeter-pam-service)
+  "Return a PAM service for @command{lightdm-greeter}."
+  (pam-service
+   (name "lightdm-greeter")
+   (auth (list
+          ;; Load environment from /etc/environment and ~/.pam_environment.
+          (pam-entry (control "required") (module "pam_env.so"))
+          ;; Always let the greeter start without authentication.
+          (pam-entry (control "required") (module "pam_permit.so"))))
+   ;; No action required for account management
+   (account (list (pam-entry (control "required") (module "pam_permit.so"))))
+   ;; Prohibit changing password.
+   (password (list (pam-entry (control "required") (module "pam_deny.so"))))
+   ;; Setup session.
+   (session (list (pam-entry (control "required") (module "pam_unix.so"))))))
+
+(define (lightdm-autologin-pam-service)
+  "Return a PAM service for @command{lightdm-autologin}}."
+  (pam-service
+   (name "lightdm-autologin")
+   (auth
+    (list
+     ;; Block login if user is globally disabled.
+     (pam-entry (control "required") (module "pam_nologin.so"))
+     (pam-entry (control "required") (module "pam_succeed_if.so")
+                (arguments (list "uid >= 1000")))
+     ;; Allow access without authentication.
+     (pam-entry (control "required") (module "pam_permit.so"))))
+   ;; Stop autologin if account requires action.
+   (account (list (pam-entry (control "required") (module "pam_unix.so"))))
+   ;; Prohibit changing password.
+   (password (list (pam-entry (control "required") (module "pam_deny.so"))))
+   ;; Setup session.
+   (session (list (pam-entry (control "required") (module "pam_unix.so"))))))
+
+(define (lightdm-pam-services config)
+  (list (lightdm-pam-service config)
+        (lightdm-greeter-pam-service)
+        (lightdm-autologin-pam-service)))
+
+(define (lightdm-shepherd-service config)
+  "Return a <lightdm-service> for LightDM using CONFIG."
+
+  (validate-lightdm-configuration config)
+
+  (define lightdm-command
+    #~(list #$(file-append (lightdm-configuration-lightdm config)
+                           "/sbin/lightdm")
+            #$@(if (lightdm-configuration-debug? config)
+                   #~("--debug")
+                   #~())
+            "--config"
+            #$(lightdm-configuration-file config)))
+
+  (define lightdm-paths
+    (let ((lightdm (lightdm-configuration-lightdm config)))
+      #~(string-join
+         '#$(map (lambda (dir)
+                   (file-append lightdm dir))
+                 '("/bin" "/sbin" "/libexec"))
+         ":")))
+
+  (define greeters-config-dir
+    (lightdm-configuration->greeters-config-dir config))
+
+  (define data-dirs
+    ;; LightDM itself needs to be in XDG_DATA_DIRS for the accountsservice
+    ;; interface it provides to be picked up.  The greeters must also be in
+    ;; XDG_DATA_DIRS to be found.
+    (let ((packages (lightdm-configuration->packages config)))
+      #~(string-join '#$(map (cut file-append <> "/share") packages)
+                     ":")))
+
+  (list
+   (shepherd-service
+    (documentation "LightDM display manager")
+    (requirement '(dbus-system user-processes host-name))
+    (provision '(lightdm display-manager xorg-server))
+    (respawn? #f)
+    (start
+     #~(lambda ()
+         ;; Note: sadly, environment variables defined for 'lightdm' are
+         ;; cleared and/or overridden by /etc/profile by its spawned greeters,
+         ;; so an out-of-band means such as /etc is required.
+         (fork+exec-command #$lightdm-command
+                            ;; Lightdm needs itself in its PATH.
+                            #:environment-variables
+                            (list
+                             ;; It knows to look for greeter configurations in
+                             ;; XDG_CONFIG_DIRS...
+                             (string-append "XDG_CONFIG_DIRS="
+                                            #$greeters-config-dir)
+                             ;; ... and for greeter .desktop files as well as
+                             ;; lightdm accountsservice interface in
+                             ;; XDG_DATA_DIRS.
+                             (string-append "XDG_DATA_DIRS="
+                                            #$data-dirs)
+                             (string-append "PATH=" #$lightdm-paths)))))
+    (stop #~(make-kill-destructor)))))
+
+(define lightdm-service-type
+  (handle-xorg-configuration
+   lightdm-configuration
+   (service-type
+    (name 'lightdm)
+    (default-value (lightdm-configuration))
+    (extensions
+     (list (service-extension pam-root-service-type lightdm-pam-services)
+           (service-extension shepherd-root-service-type
+                              lightdm-shepherd-service)
+           (service-extension activation-service-type
+                              (const %lightdm-activation))
+           (service-extension dbus-root-service-type
+                              (compose list lightdm-configuration-lightdm))
+           (service-extension polkit-service-type
+                              (compose list lightdm-configuration-lightdm))
+           (service-extension account-service-type
+                              (const %lightdm-accounts))
+           ;; Add 'lightdm' to the system profile, so that its
+           ;; 'share/accountsservice' D-Bus service extension directory can be
+           ;; found via the 'XDG_DATA_DIRS=/run/current-system/profile/share'
+           ;; environment variable set in the wrapper of the
+           ;; libexec/accounts-daemon binary of the accountsservice package.
+           ;; This daemon is spawned by D-Bus, and there's little we can do to
+           ;; affect its environment.  For more reading, see:
+           ;; https://github.com/NixOS/nixpkgs/issues/45059.
+           (service-extension profile-service-type
+                              lightdm-configuration->packages)
+           ;; This is needed for the greeter itself to find its configuration,
+           ;; because XDG_CONF_DIRS gets overridden by /etc/profile.
+           (service-extension
+            etc-service-type
+            (lambda (config)
+              `(("lightdm"
+                 ,(lightdm-configuration->greeters-config-dir config)))))))
+    (description "Run @code{lightdm}, the LightDM graphical login manager."))))
+
+
+;;;
+;;; Generate documentation.
+;;;
+(define (generate-doc)
+  (configuration->documentation 'lightdm-configuration)
+  (configuration->documentation 'lightdm-gtk-greeter-configuration)
+  (configuration->documentation 'lightdm-seat-configuration))
diff --git a/gnu/services/security.scm b/gnu/services/security.scm
new file mode 100644
index 0000000000..1e0360c07f
--- /dev/null
+++ b/gnu/services/security.scm
@@ -0,0 +1,415 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 muradm <mail@muradm.net>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu services security)
+  #:use-module (gnu packages admin)
+  #:use-module (gnu services)
+  #:use-module (gnu services configuration)
+  #:use-module (gnu services shepherd)
+  #:use-module (guix gexp)
+  #:use-module (guix packages)
+  #:use-module (guix records)
+  #:use-module (guix ui)
+  #:use-module (ice-9 format)
+  #:use-module (ice-9 match)
+  #:use-module (srfi srfi-1)
+  #:export (fail2ban-configuration
+            fail2ban-ignore-cache-configuration
+            fail2ban-jail-action-configuration
+            fail2ban-jail-configuration
+            fail2ban-jail-filter-configuration
+            fail2ban-jail-service
+            fail2ban-service-type))
+
+(define-configuration/no-serialization fail2ban-ignore-cache-configuration
+  (key string "Cache key.")
+  (max-count integer "Cache size.")
+  (max-time integer "Cache time."))
+
+(define serialize-fail2ban-ignore-cache-configuration
+  (match-lambda
+    (($ <fail2ban-ignore-cache-configuration> _ key max-count max-time)
+     (format #f "key=\"~a\", max-count=~d, max-time=~d"
+             key max-count max-time))))
+
+(define-maybe/no-serialization string)
+
+(define-configuration/no-serialization fail2ban-jail-filter-configuration
+  (name string "Filter to use.")
+  (mode maybe-string "Mode for filter."))
+
+(define serialize-fail2ban-jail-filter-configuration
+  (match-lambda
+    (($ <fail2ban-jail-filter-configuration> _ name mode)
+     (format #f "~a~@[[mode=~a]~]" name (maybe-value mode)))))
+
+(define (argument? a)
+  (and (pair? a)
+       (string? (car a))
+       (or (string? (cdr a))
+           (list-of-strings? (cdr a)))))
+
+(define list-of-arguments? (list-of argument?))
+
+(define-configuration/no-serialization fail2ban-jail-action-configuration
+  (name string "Action name.")
+  (arguments (list-of-arguments '()) "Action arguments."))
+
+(define list-of-fail2ban-jail-actions?
+  (list-of fail2ban-jail-action-configuration?))
+
+(define (serialize-fail2ban-jail-action-configuration-arguments args)
+  (let* ((multi-value
+          (lambda (v)
+            (format #f "~a" (string-join v ","))))
+         (any-value
+          (lambda (v)
+            (if (list? v) (string-append "\"" (multi-value v) "\"") v)))
+         (key-value
+          (lambda (e)
+            (format #f "~a=~a" (car e) (any-value (cdr e))))))
+    (format #f "~a" (string-join (map key-value args) ","))))
+
+(define serialize-fail2ban-jail-action-configuration
+  (match-lambda
+    (($ <fail2ban-jail-action-configuration> _ name arguments)
+     (format
+      #f "~a~a"
+      name
+      (if (null? arguments) ""
+          (format
+           #f "[~a]"
+           (serialize-fail2ban-jail-action-configuration-arguments
+            arguments)))))))
+
+(define fail2ban-backend->string
+  (match-lambda
+    ('auto "auto")
+    ('pyinotify "pyinotify")
+    ('gamin "gamin")
+    ('polling "polling")
+    ('systemd "systemd")
+    (unknown
+     (leave (G_ "fail2ban: '~a' is not a supported backend~%") unknown))))
+
+(define fail2ban-log-encoding->string
+  (match-lambda
+    ('auto "auto")
+    ('utf-8 "utf-8")
+    ('ascii "ascii")
+    (unknown
+     (leave (G_ "fail2ban: '~a' is not a supported log encoding~%") unknown))))
+
+(define (fail2ban-jail-configuration-serialize-field-name name)
+  (cond ((symbol? name)
+         (fail2ban-jail-configuration-serialize-field-name
+          (symbol->string name)))
+        ((string-suffix? "?" name)
+         (fail2ban-jail-configuration-serialize-field-name
+          (string-drop-right name 1)))
+        ((string-prefix? "ban-time-" name)
+         (fail2ban-jail-configuration-serialize-field-name
+          (string-append "bantime." (substring name 9))))
+        ((string-contains name "-")
+         (fail2ban-jail-configuration-serialize-field-name
+          (string-filter (lambda (c) (equal? c #\-)) name)))
+        (else name)))
+
+(define (fail2ban-jail-configuration-serialize-string field-name value)
+  #~(string-append
+     #$(fail2ban-jail-configuration-serialize-field-name field-name)
+     " = " #$value "\n"))
+
+(define (fail2ban-jail-configuration-serialize-integer field-name value)
+  (fail2ban-jail-configuration-serialize-string
+   field-name (number->string value)))
+
+(define (fail2ban-jail-configuration-serialize-boolean field-name value)
+  (fail2ban-jail-configuration-serialize-string
+   field-name (if value "true" "false")))
+
+(define (fail2ban-jail-configuration-serialize-backend field-name value)
+  (if (maybe-value-set? value)
+      (fail2ban-jail-configuration-serialize-string
+       field-name (fail2ban-backend->string value))
+      ""))
+
+(define (fail2ban-jail-configuration-serialize-fail2ban-ignore-cache-configuration field-name value)
+  (fail2ban-jail-configuration-serialize-string
+   field-name (serialize-fail2ban-ignore-cache-configuration value)))
+
+(define (fail2ban-jail-configuration-serialize-fail2ban-jail-filter-configuration field-name value)
+  (fail2ban-jail-configuration-serialize-string
+   field-name (serialize-fail2ban-jail-filter-configuration value)))
+
+(define (fail2ban-jail-configuration-serialize-log-encoding field-name value)
+  (if (maybe-value-set? value)
+      (fail2ban-jail-configuration-serialize-string
+       field-name (fail2ban-log-encoding->string value))
+      ""))
+
+(define (fail2ban-jail-configuration-serialize-list-of-strings field-name value)
+  (if (null? value)
+      ""
+      (fail2ban-jail-configuration-serialize-string
+       field-name (string-join value " "))))
+
+(define (fail2ban-jail-configuration-serialize-list-of-fail2ban-jail-actions field-name value)
+  (if (null? value)
+      ""
+      (fail2ban-jail-configuration-serialize-string
+       field-name (string-join
+                   (map serialize-fail2ban-jail-action-configuration value) "\n"))))
+
+(define (fail2ban-jail-configuration-serialize-symbol field-name value)
+  (fail2ban-jail-configuration-serialize-string field-name (symbol->string value)))
+
+(define (fail2ban-jail-configuration-serialize-extra-content field-name value)
+  (if (maybe-value-set? value)
+      (string-append "\n" value "\n")
+      ""))
+
+(define-maybe integer (prefix fail2ban-jail-configuration-))
+(define-maybe string (prefix fail2ban-jail-configuration-))
+(define-maybe boolean (prefix fail2ban-jail-configuration-))
+(define-maybe symbol (prefix fail2ban-jail-configuration-))
+(define-maybe fail2ban-ignore-cache-configuration (prefix fail2ban-jail-configuration-))
+(define-maybe fail2ban-jail-filter-configuration (prefix fail2ban-jail-configuration-))
+
+(define-configuration fail2ban-jail-configuration
+  (name
+   string
+   "Required name of this jail configuration.")
+  (enabled?
+   (boolean #t)
+   "Whether this jail is enabled.")
+  (backend
+   maybe-symbol
+   "Backend to use to detect changes in the @code{ogpath}.  The default is
+'auto.  To consult the defaults of the jail configuration, refer to the
+@file{/etc/fail2ban/jail.conf} file of the @code{fail2ban} package."
+fail2ban-jail-configuration-serialize-backend)
+  (max-retry
+   maybe-integer
+   "The number of failures before a host get banned
+(e.g. @code{(max-retry 5)}).")
+  (max-matches
+   maybe-integer
+   "The number of matches stored in ticket (resolvable via
+tag @code{<matches>}) in action.")
+  (find-time
+   maybe-string
+   "The time window during which the maximum retry count must be reached for
+an IP address to be banned.  A host is banned if it has generated
+@code{max-retry} during the last @code{find-time}
+seconds (e.g. @code{(find-time \"10m\")}).  It can be provided in seconds or
+using Fail2Ban's \"time abbreviation format\", as described in @command{man 5
+jail.conf}.")
+  (ban-time
+   maybe-string
+   "The duration, in seconds or time abbreviated format, that a ban should last.
+(e.g. @code{(ban-time \"10m\")}).")
+  (ban-time-increment?
+   maybe-boolean
+   "Whether to consider past bans to compute increases to the default ban time
+of a specific IP address.")
+  (ban-time-factor
+   maybe-string
+   "The coefficient to use to compute an exponentially growing ban time.")
+  (ban-time-formula
+   maybe-string
+   "This is the formula used to calculate the next value of a ban time.")
+  (ban-time-multipliers
+   maybe-string
+   "Used to calculate next value of ban time instead of formula.")
+  (ban-time-max-time
+   maybe-string
+   "The maximum number of seconds a ban should last.")
+  (ban-time-rnd-time
+   maybe-string
+   "The maximum number of seconds a randomized ban time should last.  This can
+be useful to stop ``clever'' botnets calculating the exact time an IP address
+can be unbanned again.")
+  (ban-time-overall-jails?
+   maybe-boolean
+   "When true, it specifies the search of an IP address in the database should
+be made across all jails.  Otherwise, only the current jail of the ban IP
+address is considered.")
+  (ignore-self?
+   maybe-boolean
+   "Never ban the local machine's own IP address.")
+  (ignore-ip
+   (list-of-strings '())
+   "A list of IP addresses, CIDR masks or DNS hosts to ignore.
+@code{fail2ban} will not ban a host which matches an address in this list.")
+  (ignore-cache
+   maybe-fail2ban-ignore-cache-configuration
+   "Provide cache parameters for the ignore failure check.")
+  (filter
+   maybe-fail2ban-jail-filter-configuration
+   "The filter to use by the jail, specified via a
+@code{<fail2ban-jail-filter-configuration>} object.  By default, jails have
+names matching their filter name.")
+  (log-time-zone
+   maybe-string
+   "The default time zone for log lines that do not have one.")
+  (log-encoding
+   maybe-symbol
+   "The encoding of the log files handled by the jail.
+Possible values are: @code{'ascii}, @code{'utf-8} and @code{'auto}."
+fail2ban-jail-configuration-serialize-log-encoding)
+  (log-path
+   (list-of-strings '())
+   "The file names of the log files to be monitored.")
+  (action
+   (list-of-fail2ban-jail-actions '())
+   "A list of @code{<fail2ban-jail-action-configuration>}.")
+  (extra-content
+   maybe-string
+   "Extra content for the jail configuration."
+   fail2ban-jail-configuration-serialize-extra-content)
+  (prefix fail2ban-jail-configuration-))
+
+(define list-of-fail2ban-jail-configurations?
+  (list-of fail2ban-jail-configuration?))
+
+(define (serialize-fail2ban-jail-configuration config)
+  #~(string-append
+     #$(format #f "[~a]\n" (fail2ban-jail-configuration-name config))
+     #$(serialize-configuration
+      config fail2ban-jail-configuration-fields)))
+
+(define-configuration/no-serialization fail2ban-configuration
+  (fail2ban
+   (package fail2ban)
+   "The @code{fail2ban} package to use.  It is used for both binaries and as
+base default configuration that is to be extended with
+@code{<fail2ban-jail-configuration>} objects.")
+  (run-directory
+   (string "/var/run/fail2ban")
+   "The state directory for the @code{fail2ban} daemon.")
+  (jails
+   (list-of-fail2ban-jail-configurations '())
+   "Instances of @code{<fail2ban-jail-configuration>} collected from
+extensions.")
+  (extra-jails
+   (list-of-fail2ban-jail-configurations '())
+   "Instances of @code{<fail2ban-jail-configuration>} explicitly provided.")
+  (extra-content
+   maybe-string
+   "Extra raw content to add to the end of the @file{jail.local} file."))
+
+(define (serialize-fail2ban-configuration config)
+  (let* ((jails (fail2ban-configuration-jails config))
+         (extra-jails (fail2ban-configuration-extra-jails config))
+         (extra-content (fail2ban-configuration-extra-content config)))
+    (interpose
+     (append (map serialize-fail2ban-jail-configuration
+                  (append jails extra-jails))
+             (list (if (maybe-value-set? extra-content)
+                       extra-content
+                       ""))))))
+
+(define (config->fail2ban-etc-directory config)
+  (let* ((fail2ban (fail2ban-configuration-fail2ban config))
+         (jail-local (apply mixed-text-file "jail.local"
+                            (serialize-fail2ban-configuration config))))
+    (directory-union
+     "fail2ban-configuration"
+     (list (computed-file
+            "etc-fail2ban"
+            (with-imported-modules '((guix build utils))
+              #~(begin
+                  (use-modules (guix build utils))
+                  (let ((etc (string-append #$output "/etc")))
+                    (mkdir-p etc)
+                    (symlink #$(file-append fail2ban "/etc/fail2ban")
+                             (string-append etc "/fail2ban"))))))
+           (computed-file
+            "etc-fail2ban-jail.local"
+            (with-imported-modules '((guix build utils))
+              #~(begin
+                  (use-modules (guix build utils))
+                  (define etc/fail2ban (string-append #$output
+                                                      "/etc/fail2ban"))
+                  (mkdir-p etc/fail2ban)
+                  (symlink #$jail-local (string-append etc/fail2ban
+                                                       "/jail.local")))))))))
+
+(define (fail2ban-shepherd-service config)
+  (match-record config <fail2ban-configuration>
+    (fail2ban run-directory)
+    (let* ((fail2ban-server (file-append fail2ban "/bin/fail2ban-server"))
+           (pid-file (in-vicinity run-directory "fail2ban.pid"))
+           (socket-file (in-vicinity run-directory "fail2ban.sock"))
+           (config-dir (file-append (config->fail2ban-etc-directory config)
+                                    "/etc/fail2ban"))
+           (fail2ban-action (lambda args
+                              #~(lambda _
+                                  (invoke #$fail2ban-server
+                                          "-c" #$config-dir
+                                          "-p" #$pid-file
+                                          "-s" #$socket-file
+                                          "-b"
+                                          #$@args)))))
+
+      ;; TODO: Add 'reload' action.
+      (list (shepherd-service
+             (provision '(fail2ban))
+             (documentation "Run the fail2ban daemon.")
+             (requirement '(user-processes))
+             (modules `((ice-9 match)
+                        ,@%default-modules))
+             (start (fail2ban-action "start"))
+             (stop (fail2ban-action "stop")))))))
+
+(define fail2ban-service-type
+  (service-type (name 'fail2ban)
+                (extensions
+                 (list (service-extension shepherd-root-service-type
+                                          fail2ban-shepherd-service)))
+                (compose concatenate)
+                (extend (lambda (config jails)
+                          (fail2ban-configuration
+                           (inherit config)
+                           (jails (append (fail2ban-configuration-jails config)
+                                          jails)))))
+                (default-value (fail2ban-configuration))
+                (description "Run the fail2ban server.")))
+
+(define (fail2ban-jail-service svc-type jail)
+  "Convenience procedure to add a fail2ban service extension to SVC-TYPE, a
+<service-type> object.  The fail2ban extension is specified by JAIL, a
+<fail2ban-jail-configuration> object."
+  (service-type
+   (inherit svc-type)
+   (extensions
+    (append (service-type-extensions svc-type)
+            (list (service-extension fail2ban-service-type
+                                     (lambda _ (list jail))))))))
+
+
+;;;
+;;; Documentation generation.
+;;;
+(define (generate-doc)
+  (configuration->documentation 'fail2ban-configuration)
+  (configuration->documentation 'fail2ban-ignore-cache-configuration)
+  (configuration->documentation 'fail2ban-jail-action-configuration)
+  (configuration->documentation 'fail2ban-jail-configuration)
+  (configuration->documentation 'fail2ban-jail-filter-configuration))
diff --git a/gnu/services/version-control.scm b/gnu/services/version-control.scm
index defbd65c36..17a5f9c867 100644
--- a/gnu/services/version-control.scm
+++ b/gnu/services/version-control.scm
@@ -331,6 +331,14 @@ access to exported repositories under @file{/srv/git}."
                                (strip-store-file-name admin-pubkey))))
                 (rc-file #$(string-append home "/.gitolite.rc")))
 
+           ;; activate-users+groups in (gnu build activation) sets the
+           ;; permission flags of home directories to #o700 and mentions that
+           ;; services needing looser permissions should chmod it during
+           ;; service activation.  We also want the git group to be able to
+           ;; read from the gitolite home directory, so a chmod'ing we will
+           ;; go!
+           (chmod #$home #o750)
+
            (simple-format #t "guix: gitolite: installing ~A\n" #$rc-file)
            (copy-file #$rc-file rc-file)
            ;; ensure gitolite's user can read the configuration
diff --git a/gnu/tests/base.scm b/gnu/tests/base.scm
index 353d6d415a..636b127fb8 100644
--- a/gnu/tests/base.scm
+++ b/gnu/tests/base.scm
@@ -341,7 +341,7 @@ info --version")
                       (wait-for-screen-text marionette
                                             (lambda (text)
                                               (string-contains text "Password"))
-                                            #:ocrad
+                                            #:ocr
                                             #$(file-append ocrad "/bin/ocrad"))
                       (marionette-type (string-append password "\n\n")
                                        marionette))
@@ -510,7 +510,7 @@ info --version")
 
           (test-assert "screen text"
             (let ((text (marionette-screen-text marionette
-                                                #:ocrad
+                                                #:ocr
                                                 #$(file-append ocrad
                                                                "/bin/ocrad"))))
               ;; Check whether the welcome message and shell prompt are
diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index fbb97d451c..4e0e274e66 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -784,7 +784,7 @@ to enter the LUKS passphrase."
             ;; At this point we have no choice but to use OCR to determine
             ;; when the passphrase should be entered.
             (wait-for-screen-text #$marionette passphrase-prompt?
-                                  #:ocrad #$ocrad)
+                                  #:ocr #$ocrad)
             (marionette-type #$(string-append %luks-passphrase "\n")
                              #$marionette)
 
@@ -792,7 +792,7 @@ to enter the LUKS passphrase."
             ;; we can then be sure we match the "Enter passphrase" prompt from
             ;; 'cryptsetup', in the initrd.
             (wait-for-screen-text #$marionette (negate bios-boot-screen?)
-                                  #:ocrad #$ocrad
+                                  #:ocr #$ocrad
                                   #:timeout 20)))
 
         (test-assert "enter LUKS passphrase for the initrd"
@@ -800,7 +800,7 @@ to enter the LUKS passphrase."
             ;; XXX: Here we use OCR as well but we could instead use QEMU
             ;; '-serial stdio' and run it in an input pipe,
             (wait-for-screen-text #$marionette passphrase-prompt?
-                                  #:ocrad #$ocrad
+                                  #:ocr #$ocrad
                                   #:timeout 60)
             (marionette-type #$(string-append %luks-passphrase "\n")
                              #$marionette)
@@ -999,7 +999,7 @@ launched as a shepherd service."
             ;; XXX: Here we use OCR as well but we could instead use QEMU
             ;; '-serial stdio' and run it in an input pipe,
             (wait-for-screen-text #$marionette passphrase-prompt?
-                                  #:ocrad #$ocrad
+                                  #:ocr #$ocrad
                                   #:timeout 120)
             (marionette-type #$(string-append %luks-passphrase "\n")
                              #$marionette)
diff --git a/gnu/tests/lightdm.scm b/gnu/tests/lightdm.scm
new file mode 100644
index 0000000000..431b388e7e
--- /dev/null
+++ b/gnu/tests/lightdm.scm
@@ -0,0 +1,160 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>.
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu tests lightdm)
+  #:use-module (gnu bootloader)
+  #:use-module (gnu bootloader grub)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages ocr)
+  #:use-module (gnu packages ratpoison)
+  #:use-module (gnu packages vnc)
+  #:use-module (gnu packages xorg)
+  #:use-module (gnu services)
+  #:use-module (gnu services base)
+  #:use-module (gnu services dbus)
+  #:use-module (gnu services desktop)
+  #:use-module (gnu services networking)
+  #:use-module (gnu services lightdm)
+  #:use-module (gnu services ssh)
+  #:use-module (gnu services xorg)
+  #:use-module (gnu system)
+  #:use-module (gnu system file-systems)
+  #:use-module (gnu system shadow)
+  #:use-module (gnu system vm)
+  #:use-module (gnu tests)
+  #:use-module (guix gexp)
+  #:use-module (guix modules)
+  #:use-module (srfi srfi-1)
+  #:export (%test-lightdm))
+
+(define minimal-desktop-services
+  (list polkit-wheel-service
+        (service upower-service-type)
+        (accountsservice-service)
+        (service polkit-service-type)
+        (elogind-service)
+        (dbus-service)
+        x11-socket-directory-service))
+
+(define %lightdm-os
+  (operating-system
+    (inherit %simple-os)
+    (packages (cons* ocrad ratpoison xterm %base-packages))
+    (services
+     (cons* (service lightdm-service-type
+                     (lightdm-configuration
+                      (allow-empty-passwords? #t)
+                      (debug? #t)
+                      (xdmcp? #t)
+                      (vnc-server? #t)
+                      (vnc-server-command
+                       (file-append tigervnc-server "/bin/Xvnc"
+                                    "  -SecurityTypes None"))
+                      (greeters (list (lightdm-gtk-greeter-configuration
+                                       (allow-debugging? #t))))
+                      (seats (list (lightdm-seat-configuration
+                                    (name "*")
+                                    (user-session "ratpoison"))))))
+
+            ;; For debugging.
+            (service dhcp-client-service-type)
+            (service openssh-service-type
+                     (openssh-configuration
+                      (permit-root-login #t)
+                      (allow-empty-passwords? #t)))
+            (append minimal-desktop-services
+                    (remove (lambda (service)
+                              (eq? (service-kind service) guix-service-type))
+                            %base-services))))))
+
+(define (run-lightdm-test)
+  "Run tests in %LIGHTDM-OS."
+
+  (define os (marionette-operating-system
+              %lightdm-os
+              #:imported-modules (source-module-closure
+                                  '((gnu services herd)))))
+
+  (define vm (virtual-machine os))
+
+  (define test
+    (with-imported-modules (source-module-closure
+                            '((gnu build marionette)))
+      #~(begin
+          (use-modules (gnu build marionette)
+                       (srfi srfi-26)
+                       (srfi srfi-64))
+
+          (let ((marionette (make-marionette (list #$vm))))
+
+            (test-runner-current (system-test-runner #$output))
+            (test-begin "lightdm")
+
+            (test-assert "service is running"
+              (marionette-eval
+               '(begin
+                  (use-modules (gnu services herd))
+                  (start-service 'lightdm))
+               marionette))
+
+            (test-assert "service can be stopped"
+              (marionette-eval
+               '(begin
+                  (use-modules (gnu services herd))
+                  (stop-service 'lightdm))
+               marionette))
+
+            (test-assert "service can be restarted"
+              (marionette-eval
+               '(begin
+                  (use-modules (gnu services herd))
+                  (restart-service 'lightdm))
+               marionette))
+
+            (test-assert "login screen is displayed"
+              ;; GNU Ocrad fails to recognize the "Log In" button text, so use
+              ;; Tesseract.
+              (wait-for-screen-text marionette
+                                    (cut string-contains <> "Log In")
+                                    #:ocr #$(file-append tesseract-ocr
+                                                         "/bin/tesseract")))
+
+            (test-assert "can connect to TCP port 5900 on IPv4"
+              (wait-for-tcp-port 5900 marionette))
+
+            ;; The VNC server fails to listen to IPv6 due to "Error binding to
+            ;; address [::]:5900: Address already in use" (see:
+            ;; https://github.com/canonical/lightdm/issues/266).
+            (test-expect-fail 1)
+            (test-assert "can connect to TCP port 5900 on IPv6"
+              (wait-for-tcp-port 5900 marionette
+                                 #:address
+                                 `(make-socket-address
+                                   AF_INET6
+                                   (inet-pton AF_INET6 "::1")
+                                   5900)))
+
+            (test-end)))))
+
+  (gexp->derivation "lightdm-test" test))
+
+(define %test-lightdm
+  (system-test
+   (name "lightdm")
+   (description "Basic tests for the LightDM service.")
+   (value (run-lightdm-test))))
diff --git a/gnu/tests/security.scm b/gnu/tests/security.scm
new file mode 100644
index 0000000000..ca6c857899
--- /dev/null
+++ b/gnu/tests/security.scm
@@ -0,0 +1,221 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 muradm <mail@muradm.net>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu tests security)
+  #:use-module (guix gexp)
+  #:use-module (gnu packages admin)
+  #:use-module (gnu services)
+  #:use-module (gnu services security)
+  #:use-module (gnu services ssh)
+  #:use-module (gnu system)
+  #:use-module (gnu system vm)
+  #:use-module (gnu tests)
+  #:export (%test-fail2ban-basic
+            %test-fail2ban-extension
+            %test-fail2ban-simple))
+
+
+;;;
+;;; fail2ban tests
+;;;
+
+(define-syntax-rule (fail2ban-test test-name test-os tests-more ...)
+  (lambda ()
+    (define os
+      (marionette-operating-system
+       test-os
+       #:imported-modules '((gnu services herd))))
+
+    (define vm
+      (virtual-machine
+       (operating-system os)
+       (port-forwardings '())))
+
+    (define test
+      (with-imported-modules '((gnu build marionette)
+                               (guix build utils))
+        #~(begin
+            (use-modules (srfi srfi-64)
+                         (gnu build marionette))
+
+            (define marionette (make-marionette (list #$vm)))
+
+            (test-runner-current (system-test-runner #$output))
+            (test-begin test-name)
+
+            (test-assert "fail2ban running"
+              (marionette-eval
+               '(begin
+                  (use-modules (gnu services herd))
+                  (start-service 'fail2ban))
+               marionette))
+
+            (test-assert "fail2ban socket ready"
+              (wait-for-unix-socket
+               "/var/run/fail2ban/fail2ban.sock" marionette))
+
+            (test-assert "fail2ban running after restart"
+              (marionette-eval
+               '(begin
+                  (use-modules (gnu services herd))
+                  (restart-service 'fail2ban))
+               marionette))
+
+            (test-assert "fail2ban socket ready after restart"
+              (wait-for-unix-socket
+               "/var/run/fail2ban/fail2ban.sock" marionette))
+
+            (test-assert "fail2ban pid ready"
+              (marionette-eval
+               '(file-exists? "/var/run/fail2ban/fail2ban.pid")
+               marionette))
+
+            (test-assert "fail2ban log file"
+              (marionette-eval
+               '(file-exists? "/var/log/fail2ban.log")
+               marionette))
+
+            tests-more ...
+
+            (test-end))))
+
+    (gexp->derivation test-name test)))
+
+(define run-fail2ban-basic-test
+  (fail2ban-test
+   "fail2ban-basic-test"
+
+   (simple-operating-system
+    (service fail2ban-service-type))))
+
+(define %test-fail2ban-basic
+  (system-test
+   (name "fail2ban-basic")
+   (description "Test basic fail2ban running capability.")
+   (value (run-fail2ban-basic-test))))
+
+(define %fail2ban-server-cmd
+  (program-file
+   "fail2ban-server-cmd"
+   #~(begin
+       (let ((cmd #$(file-append fail2ban "/bin/fail2ban-server")))
+         (apply execl cmd cmd `("-p" "/var/run/fail2ban/fail2ban.pid"
+                                "-s" "/var/run/fail2ban/fail2ban.sock"
+                                ,@(cdr (program-arguments))))))))
+
+(define run-fail2ban-simple-test
+  (fail2ban-test
+   "fail2ban-basic-test"
+
+   (simple-operating-system
+    (service fail2ban-service-type (fail2ban-configuration
+                                    (jails (list (fail2ban-jail-configuration
+                                                  (name "sshd")))))))
+
+   (test-equal "fail2ban sshd jail running status output"
+     '("Status for the jail: sshd"
+       "|- Filter"
+       "|  |- Currently failed:\t0"
+       "|  |- Total failed:\t0"
+       "|  `- File list:\t/var/log/secure"
+       "`- Actions"
+       "   |- Currently banned:\t0"
+       "   |- Total banned:\t0"
+       "   `- Banned IP list:\t"
+       "")
+     (marionette-eval
+      '(begin
+         (use-modules (ice-9 rdelim) (ice-9 popen) (rnrs io ports))
+         (let ((call-command
+                (lambda (cmd)
+                  (let* ((err-cons (pipe))
+                         (port (with-error-to-port (cdr err-cons)
+                                 (lambda () (open-input-pipe cmd))))
+                         (_ (setvbuf (car err-cons) 'block
+                                     (* 1024 1024 16)))
+                         (result (read-delimited "" port)))
+                    (close-port (cdr err-cons))
+                    (values result (read-delimited "" (car err-cons)))))))
+           (string-split
+            (call-command
+             (string-join (list #$%fail2ban-server-cmd "status" "sshd") " "))
+            #\newline)))
+      marionette))
+
+   (test-equal "fail2ban sshd jail running exit code"
+     0
+     (marionette-eval
+      '(status:exit-val (system* #$%fail2ban-server-cmd "status" "sshd"))
+      marionette))))
+
+(define %test-fail2ban-simple
+  (system-test
+   (name "fail2ban-simple")
+   (description "Test simple fail2ban running capability.")
+   (value (run-fail2ban-simple-test))))
+
+(define run-fail2ban-extension-test
+  (fail2ban-test
+   "fail2ban-extension-test"
+
+   (simple-operating-system
+    (service (fail2ban-jail-service openssh-service-type (fail2ban-jail-configuration
+                                                          (name "sshd") (enabled? #t)))
+             (openssh-configuration)))
+
+   (test-equal "fail2ban sshd jail running status output"
+     '("Status for the jail: sshd"
+       "|- Filter"
+       "|  |- Currently failed:\t0"
+       "|  |- Total failed:\t0"
+       "|  `- File list:\t/var/log/secure"
+       "`- Actions"
+       "   |- Currently banned:\t0"
+       "   |- Total banned:\t0"
+       "   `- Banned IP list:\t"
+       "")
+     (marionette-eval
+      '(begin
+         (use-modules (ice-9 rdelim) (ice-9 popen) (rnrs io ports))
+         (let ((call-command
+                (lambda (cmd)
+                  (let* ((err-cons (pipe))
+                         (port (with-error-to-port (cdr err-cons)
+                                 (lambda () (open-input-pipe cmd))))
+                         (_ (setvbuf (car err-cons) 'block
+                                     (* 1024 1024 16)))
+                         (result (read-delimited "" port)))
+                    (close-port (cdr err-cons))
+                    (values result (read-delimited "" (car err-cons)))))))
+           (string-split
+            (call-command
+             (string-join (list #$%fail2ban-server-cmd "status" "sshd") " "))
+            #\newline)))
+      marionette))
+
+   (test-equal "fail2ban sshd jail running exit code"
+     0
+     (marionette-eval
+      '(status:exit-val (system* #$%fail2ban-server-cmd "status" "sshd"))
+      marionette))))
+
+(define %test-fail2ban-extension
+  (system-test
+   (name "fail2ban-extension")
+   (description "Test extension fail2ban running capability.")
+   (value (run-fail2ban-extension-test))))
diff --git a/gnu/tests/virtualization.scm b/gnu/tests/virtualization.scm
index 4bd56e5d9d..60789fbb5b 100644
--- a/gnu/tests/virtualization.scm
+++ b/gnu/tests/virtualization.scm
@@ -3,6 +3,7 @@
 ;;; Copyright © 2020-2022 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 ;;; Copyright © 2021 Pierre Langlois <pierre.langlois@gmx.com>
+;;; Copyright © 2022 Marius Bakke <marius@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -106,6 +107,26 @@
                          "-c" "qemu:///system" "connect"))
              marionette))
 
+          (test-eq "create default network"
+            0
+            (marionette-eval
+             '(begin
+                (chdir "/tmp")
+                (system* #$(file-append libvirt "/bin/virsh")
+                         "-c" "qemu:///system" "net-define"
+                         #$(file-append libvirt
+                                        "/etc/libvirt/qemu/networks/default.xml")))
+             marionette))
+
+          (test-eq "start default network"
+            0
+            (marionette-eval
+             '(begin
+                (chdir "/tmp")
+                (system* #$(file-append libvirt "/bin/virsh")
+                         "-c" "qemu:///system" "net-start" "default"))
+             marionette))
+
           (test-end))))
 
   (gexp->derivation "libvirt-test" test))
diff --git a/guix/gexp.scm b/guix/gexp.scm
index ef92223048..73595a216b 100644
--- a/guix/gexp.scm
+++ b/guix/gexp.scm
@@ -2140,8 +2140,8 @@ Call RESOLVE-COLLISION when several files collide, passing it the list of
 colliding files.  RESOLVE-COLLISION must return the chosen file or #f, in
 which case the colliding entry is skipped altogether.
 
-When HARD-LINKS? is true, create hard links instead of symlinks.  When QUIET?
-is true, the derivation will not print anything."
+When COPY? is true, copy files instead of creating symlinks.  When QUIET?  is
+true, the derivation will not print anything."
   (define symlink
     (if copy?
         (gexp (lambda (old new)
diff --git a/guix/scripts/system.scm b/guix/scripts/system.scm
index be6e839941..443e9d3282 100644
--- a/guix/scripts/system.scm
+++ b/guix/scripts/system.scm
@@ -1046,6 +1046,10 @@ Some ACTIONS support additional ARGS.\n"))
                          for 'describe' and 'list-generations', list installed
                          packages matching REGEXP"))
   (newline)
+  (show-cross-build-options-help)
+  (newline)
+  (show-native-build-options-help)
+  (newline)
   (display (G_ "
   -h, --help             display this help and exit"))
   (display (G_ "
@@ -1136,14 +1140,6 @@ Some ACTIONS support additional ARGS.\n"))
                    (let ((level (string->number* arg)))
                      (alist-cons 'verbosity level
                                  (alist-delete 'verbosity result)))))
-         (option '(#\s "system") #t #f
-                 (lambda (opt name arg result)
-                   (alist-cons 'system arg
-                               (alist-delete 'system result eq?))))
-         (option '("target") #t #f
-                 (lambda (opt name arg result)
-                   (alist-cons 'target arg
-                               (alist-delete 'target result eq?))))
          (option '(#\r "root") #t #f
                  (lambda (opt name arg result)
                    (alist-cons 'gc-root arg result)))
@@ -1153,7 +1149,9 @@ Some ACTIONS support additional ARGS.\n"))
          (option '(#\I "list-installed") #f #t
                  (lambda (opt name arg result)
                    (alist-cons 'list-installed (or arg "") result)))
-         %standard-build-options))
+         (append %standard-build-options
+                 %standard-cross-build-options
+                 %standard-native-build-options)))
 
 (define %default-options
   ;; Alist of default option values.
diff --git a/tests/boot-parameters.scm b/tests/boot-parameters.scm
index 8e48e1775e..03a1d01aff 100644
--- a/tests/boot-parameters.scm
+++ b/tests/boot-parameters.scm
@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2019, 2020 Miguel Ángel Arruga Vivas <rosen644835@gmail.com>
+;;; Copyright © 2022 Josselin Poiret <dev@jpoiret.xyz>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -303,4 +304,26 @@
    (operating-system-boot-parameters %default-operating-system
                                      %default-root-device)))
 
+(define %uuid-menu-entry
+  (menu-entry
+   (label "test")
+   (device (uuid "6d5b13d4-6092-46d0-8be4-073dc07413cc"))
+   (linux "/boot/bzImage")
+   (initrd "/boot/initrd.cpio.gz")))
+
+(define %file-system-label-menu-entry
+  (menu-entry
+   (label "test")
+   (device (file-system-label "test-label"))
+   (linux "/boot/bzImage")
+   (initrd "/boot/initrd.cpio.gz")))
+
+(test-equal "menu-entry roundtrip, uuid"
+  %uuid-menu-entry
+  (sexp->menu-entry (menu-entry->sexp %uuid-menu-entry)))
+
+(test-equal "menu-entry roundtrip, file-system-label"
+  %file-system-label-menu-entry
+  (sexp->menu-entry (menu-entry->sexp %file-system-label-menu-entry)))
+
 (test-end "boot-parameters")
diff --git a/tests/services/lightdm.scm b/tests/services/lightdm.scm
new file mode 100644
index 0000000000..283df2befc
--- /dev/null
+++ b/tests/services/lightdm.scm
@@ -0,0 +1,52 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (tests services lightdm)
+  #:use-module (guix diagnostics)
+  #:use-module (gnu services lightdm)
+  #:use-module (srfi srfi-64))
+
+;;; Tests for the (gnu services lightdm) module.
+
+;;; Access some internals for whitebox testing.
+(define validate-lightdm-configuration (@@ (gnu services lightdm)
+                                           validate-lightdm-configuration))
+
+(test-begin "lightdm-service")
+
+(test-equal "error on missing greeter"
+  'ok
+  (catch 'quit
+    (lambda ()
+      (validate-lightdm-configuration (lightdm-configuration (greeters '()))))
+    (lambda _
+      'ok)))
+
+(test-equal "error when a greeter has multiple configurations"
+  'ok
+  (catch 'quit
+    (lambda ()
+      (lightdm-configuration
+       (greeters (list (lightdm-gtk-greeter-configuration
+                        (theme-name "boring"))
+                       (lightdm-gtk-greeter-configuration
+                        (theme-name "blue"))))))
+    (lambda _
+      'ok)))
+
+(test-end "lightdm-service")