Add "guix pull".

* guix/scripts/pull.scm: New file.
* Makefile.am (MODULES): Add it.
* doc/guix.texi (Invoking guix pull): New node.
  (Invoking guix package): Add cross-ref to it.
* guix/ui.scm (config-directory): New procedure.
* scripts/guix.in: When `GUIX_UNINSTALLED' is undefined, add
  $XDG_CONFIG_HOME/guix/latest to the search path.
* po/POTFILES.in: Add guix/scripts/pull.scm.

1 files changed, 33 insertions, 0 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 9245bd00f5..6a9ebab1f6 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -393,6 +393,7 @@ management tools it provides.
 * Features::                    How Guix will make your life brighter.
 * Invoking guix package::       Package installation, removal, etc.
 * Invoking guix gc::            Running the garbage collector.
+* Invoking guix pull::          Fetching the latest Guix and distribution.
 @end menu
 
 @node Features
@@ -521,6 +522,11 @@ Remove @var{package}.
 @itemx -u @var{regexp}
 Upgrade all the installed packages matching @var{regexp}.
 
+Note that this upgrades package to the latest version of packages found
+in the distribution currently installed.  To update your distribution,
+you should regularly run @command{guix pull} (@pxref{Invoking guix
+pull}).
+
 @item --roll-back
 Roll back to the previous @dfn{generation} of the profile---i.e., undo
 the last transaction.
@@ -654,6 +660,33 @@ Show the list of live store files and directories.
 @end table
 
 
+@node Invoking guix pull
+@section Invoking @command{guix pull}
+
+Packages are installed or upgraded to the latest version available in
+the distribution currently available on your local machine.  To update
+that distribution, along with the Guix tools, you must run @command{guix
+pull}: the command downloads the latest Guix source code and package
+descriptions, and deploys it.
+
+On completion, @command{guix package} will use packages and package
+versions from this just-retrieved copy of Guix.  Not only that, but all
+the Guix commands and Scheme modules will also be taken from that latest
+version.  New @command{guix} sub-commands added by the update also
+become available.
+
+The @command{guix pull} command is usually invoked with no arguments,
+but it supports the following options:
+
+@table @code
+@item --verbose
+Produce verbose output, writing build logs to the standard error output.
+
+@item --bootstrap
+Use the bootstrap Guile to build the latest Guix.  This option is only
+useful to Guix developers.
+@end table
+
 @c *********************************************************************
 @node Programming Interface
 @chapter Programming Interface