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authorMark H Weaver <mhw@netris.org>2015-06-14 08:49:42 -0400
committerMark H Weaver <mhw@netris.org>2015-06-14 08:49:42 -0400
commitbcf2971f6ebc965aa94391b2a8d39e5005885806 (patch)
treec12187a787b934fb79d159046a4a5516e5d39f97 /doc
parentec2990716005b4b41bab6b707ada0206c1655be8 (diff)
parent7871724df7218428fac53133496c474bac8c5ea8 (diff)
downloadguix-bcf2971f6ebc965aa94391b2a8d39e5005885806.tar
guix-bcf2971f6ebc965aa94391b2a8d39e5005885806.tar.gz
Merge branch 'master' into core-updates
Conflicts: gnu/packages/commencement.scm gnu/packages/xml.scm
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-rw-r--r--doc/contributing.texi216
-rw-r--r--doc/guix.texi80
2 files changed, 241 insertions, 55 deletions
diff --git a/doc/contributing.texi b/doc/contributing.texi
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+++ b/doc/contributing.texi
@@ -0,0 +1,216 @@
+@node Contributing
+@chapter Contributing
+
+This project is a cooperative effort, and we need your help to make it
+grow! Please get in touch with us on @email{guix-devel@@gnu.org} and
+@code{#guix} on the Freenode IRC network. We welcome ideas, bug
+reports, patches, and anything that may be helpful to the project. We
+particularly welcome help on packaging (@pxref{Packaging Guidelines}).
+
+@menu
+* Building from Git:: The latest and greatest.
+* Running Guix Before It Is Installed:: Hacker tricks.
+* The Perfect Setup:: The right tools.
+* Coding Style:: Hygiene of the contributor.
+* Submitting Patches:: Share your work.
+@end menu
+
+@node Building from Git
+@section Building from Git
+
+If you want to hack Guix itself, it is recommended to use the latest
+version from the Git repository. When building Guix from a checkout,
+the following packages are required in addition to those mentioned in
+the installation instructions (@pxref{Requirements}).
+
+@itemize
+@item @url{http://gnu.org/software/autoconf/, GNU Autoconf};
+@item @url{http://gnu.org/software/automake/, GNU Automake};
+@item @url{http://gnu.org/software/gettext/, GNU Gettext};
+@item @url{http://www.graphviz.org/, Graphviz};
+@item @url{http://www.gnu.org/software/help2man/, GNU Help2man (optional)}.
+@end itemize
+
+Run @command{./bootstrap} to download the Nix daemon source code and to
+generate the build system infrastructure using autoconf. It reports an
+error if an inappropriate version of the above packages is being used.
+
+@noindent
+If you get an error like this one:
+
+@example
+configure.ac:46: error: possibly undefined macro: PKG_CHECK_MODULES
+@end example
+
+it probably means that Autoconf couldn’t find @file{pkg.m4}, which is
+provided by @command{pkg-config}. Make sure that @file{pkg.m4} is
+available. For instance, if you installed Automake in
+@file{/usr/local}, it wouldn’t look for @file{.m4} files in
+@file{/usr/share}. So you have to invoke the following command in that
+case
+
+@example
+export ACLOCAL_PATH=/usr/share/aclocal
+@end example
+
+See @pxref{Macro Search Path,,, automake, The GNU Automake Manual} for
+more information.
+
+Then, run @command{./configure} as usual.
+
+Finally, you have to invoke @code{make check} to run tests. If anything
+fails, take a look at installation instructions (@pxref{Installation})
+or send a message to the @email{guix-devel@@gnu.org, mailing list}.
+
+
+@node Running Guix Before It Is Installed
+@section Running Guix Before It Is Installed
+
+In order to keep a sane working environment, you will find it useful to
+test the changes made in your local source tree checkout without
+actually installing them. So that you can distinguish between your
+``end-user'' hat and your ``motley'' costume.
+
+To that end, all the command-line tools can be used even if you have not
+run @code{make install}. To do that, prefix each command with
+@command{./pre-inst-env} (the @file{pre-inst-env} script lives in the
+top build tree of Guix), as in:
+
+@example
+$ sudo ./pre-inst-env guix-daemon --build-users-group=guixbuild
+$ ./pre-inst-env guix build hello
+@end example
+
+@noindent
+Similarly, for a Guile session using the Guix modules:
+
+@example
+$ ./pre-inst-env guile -c '(use-modules (guix utils)) (pk (%current-system))'
+@end example
+
+The @command{pre-inst-env} script sets up all the environment variables
+necessary to support this, including @env{PATH} and @env{GUILE_LOAD_PATH}.
+
+
+@node The Perfect Setup
+@section The Perfect Setup
+
+The Perfect Setup to hack on Guix is basically the perfect setup used
+for Guile hacking (@pxref{Using Guile in Emacs,,, guile, Guile Reference
+Manual}). First, you need more than an editor, you need
+@url{http://www.gnu.org/software/emacs, Emacs}, empowered by the
+wonderful @url{http://nongnu.org/geiser/, Geiser}.
+
+Geiser allows for interactive and incremental development from within
+Emacs: code compilation and evaluation from within buffers, access to
+on-line documentation (docstrings), context-sensitive completion,
+@kbd{M-.} to jump to an object definition, a REPL to try out your code,
+and more (@pxref{Introduction,,, geiser, Geiser User Manual}). For
+convenient Guix development, make sure to augment Guile’s load path so
+that it finds source files from your checkout:
+
+@lisp
+;; @r{Assuming the Guix checkout is in ~/src/guix.}
+(add-to-list 'geiser-guile-load-path "~/src/guix")
+@end lisp
+
+To actually edit the code, Emacs already has a neat Scheme mode. But in
+addition to that, you must not miss
+@url{http://www.emacswiki.org/emacs/ParEdit, Paredit}. It provides
+facilities to directly operate on the syntax tree, such as raising an
+s-expression or wrapping it, swallowing or rejecting the following
+s-expression, etc.
+
+
+@node Coding Style
+@section Coding Style
+
+In general our code follows the GNU Coding Standards (@pxref{Top,,,
+standards, GNU Coding Standards}). However, they do not say much about
+Scheme, so here are some additional rules.
+
+@menu
+* Programming Paradigm:: How to compose your elements.
+* Modules:: Where to store your code?
+* Data Types and Pattern Matching:: Implementing data structures.
+* Formatting Code:: Writing conventions.
+@end menu
+
+@node Programming Paradigm
+@subsection Programming Paradigm
+
+Scheme code in Guix is written in a purely functional style. One
+exception is code that involves input/output, and procedures that
+implement low-level concepts, such as the @code{memoize} procedure.
+
+@node Modules
+@subsection Modules
+
+Guile modules that are meant to be used on the builder side must live in
+the @code{(guix build @dots{})} name space. They must not refer to
+other Guix or GNU modules. However, it is OK for a ``host-side'' module
+to use a build-side module.
+
+Modules that deal with the broader GNU system should be in the
+@code{(gnu @dots{})} name space rather than @code{(guix @dots{})}.
+
+@node Data Types and Pattern Matching
+@subsection Data Types and Pattern Matching
+
+The tendency in classical Lisp is to use lists to represent everything,
+and then to browse them ``by hand'' using @code{car}, @code{cdr},
+@code{cadr}, and co. There are several problems with that style,
+notably the fact that it is hard to read, error-prone, and a hindrance
+to proper type error reports.
+
+Guix code should define appropriate data types (for instance, using
+@code{define-record-type*}) rather than abuse lists. In addition, it
+should use pattern matching, via Guile’s @code{(ice-9 match)} module,
+especially when matching lists.
+
+@node Formatting Code
+@subsection Formatting Code
+
+When writing Scheme code, we follow common wisdom among Scheme
+programmers. In general, we follow the
+@url{http://mumble.net/~campbell/scheme/style.txt, Riastradh's Lisp
+Style Rules}. This document happens to describe the conventions mostly
+used in Guile’s code too. It is very thoughtful and well written, so
+please do read it.
+
+Some special forms introduced in Guix, such as the @code{substitute*}
+macro, have special indentation rules. These are defined in the
+@file{.dir-locals.el} file, which Emacs automatically uses. If you do
+not use Emacs, please make sure to let your editor know the rules.
+
+We require all top-level procedures to carry a docstring. This
+requirement can be relaxed for simple private procedures in the
+@code{(guix build @dots{})} name space, though.
+
+Procedures should not have more than four positional parameters. Use
+keyword parameters for procedures that take more than four parameters.
+
+
+@node Submitting Patches
+@section Submitting Patches
+
+Development is done using the Git distributed version control system.
+Thus, access to the repository is not strictly necessary. We welcome
+contributions in the form of patches as produced by @code{git
+format-patch} sent to the @email{guix-devel@@gnu.org, mailing list}.
+Please write commit logs in the ChangeLog format (@pxref{Change Logs,,,
+standards, GNU Coding Standards}); you can check the commit history for
+examples.
+
+Before submitting a patch that adds or modifies a package definition,
+please run @code{guix lint @var{package}}, where @var{package} is the
+name of the new or modified package, and fix any errors it reports
+(@pxref{Invoking guix lint}). In addition, please make sure the package
+builds on your platform, using @code{guix build @var{package}}. You may
+also want to check that dependent package (if applicable) are not
+affected by the change; @code{guix refresh --list-dependent
+@var{package}} will help you do that (@pxref{Invoking guix refresh}).
+
+When posting a patch to the mailing list, use @samp{[PATCH] @dots{}} as a
+subject. You may use your email client or the @command{git send-mail}
+command.
diff --git a/doc/guix.texi b/doc/guix.texi
index be7a292f08..46dccb8e2b 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -13,6 +13,8 @@
Copyright @copyright{} 2012, 2013, 2014, 2015 Ludovic Courtès@*
Copyright @copyright{} 2013, 2014 Andreas Enge@*
Copyright @copyright{} 2013 Nikita Karetnikov@*
+Copyright @copyright{} 2015 Mathieu Lirzin@*
+Copyright @copyright{} 2014 Pierre-Antoine Rault@*
Copyright @copyright{} 2015 Taylan Ulrich Bayırlı/Kammer
Permission is granted to copy, distribute and/or modify this document
@@ -88,7 +90,6 @@ Installation
* Running the Test Suite:: Testing Guix.
* Setting Up the Daemon:: Preparing the build daemon's environment.
* Invoking guix-daemon:: Running the build daemon.
-* Running Guix Before It Is Installed:: Hacker tricks.
Setting Up the Daemon
@@ -177,6 +178,21 @@ Packaging Guidelines
* Perl Modules:: Little pearls.
* Fonts:: Fond of fonts.
+Contributing
+
+* Building from Git:: The latest and greatest.
+* Running Guix Before It Is Installed:: Hacker tricks.
+* The Perfect Setup:: The right tools.
+* Coding Style:: Hygiene of the contributor.
+* Submitting Patches:: Share your work.
+
+Coding Style
+
+* Programming Paradigm:: How to compose your elements.
+* Modules:: Where to store your code?
+* Data Types and Pattern Matching:: Implementing data structures.
+* Formatting Code:: Writing conventions.
+
@end detailmenu
@end menu
@@ -253,7 +269,6 @@ instead, you want to install the complete GNU operating system,
* Running the Test Suite:: Testing Guix.
* Setting Up the Daemon:: Preparing the build daemon's environment.
* Invoking guix-daemon:: Running the build daemon.
-* Running Guix Before It Is Installed:: Hacker tricks.
@end menu
@node Binary Installation
@@ -847,44 +862,6 @@ useful in exceptional circumstances, such as if you need to run several
daemons on the same machine.
@end table
-@node Running Guix Before It Is Installed
-@section Running Guix Before It Is Installed
-
-If you are hacking Guix itself---which is a good idea!---you will find
-it useful to test the changes made in your local source tree checkout
-without actually installing them.
-
-To that end, all the command-line tools can be used even if you have not
-run @command{make install}. To do that, prefix each command with
-@command{./pre-inst-env} (the @file{pre-inst-env} script lives in the
-top build tree of Guix), as in:
-
-@example
-$ sudo ./pre-inst-env guix-daemon --build-users-group=guixbuild
-$ ./pre-inst-env guix build hello
-@end example
-
-@noindent
-Similarly, for a Guile session using the Guix modules:
-
-@example
-$ ./pre-inst-env guile -c '(use-modules (guix utils)) (pk (%current-system))'
-@end example
-
-The @command{pre-inst-env} script sets up all the environment variables
-necessary to support this, including @code{PATH} and
-@code{GUILE_LOAD_PATH}.
-
-If you are hacking Guix from Emacs using the wonderful Geiser
-(@pxref{Introduction,,, geiser, Geiser User Manual}), make sure to
-augment Guile's load path so that it finds source files from your
-checkout:
-
-@lisp
-;; Assuming the Guix checkout is in ~/src/guix.
-(add-to-list 'geiser-guile-load-path "~/src/guix")
-@end lisp
-
@c *********************************************************************
@node Package Management
@@ -3438,6 +3415,13 @@ candidates:
guix build guile --with-source=../guile-2.0.9.219-e1bb7.tar.xz
@end example
+@dots{} or to build from a checkout in a pristine environment:
+
+@example
+$ git clone git://git.sv.gnu.org/guix.git
+$ guix build guix --with-source=./guix
+@end example
+
@item --no-grafts
Do not ``graft'' packages. In practice, this means that package updates
available as grafts are not applied. @xref{Security Updates}, for more
@@ -6781,22 +6765,8 @@ Second, some of the required packages could fail to build for that
platform. Lastly, the generated binaries could be broken for some
reason.
-
@c *********************************************************************
-@node Contributing
-@chapter Contributing
-
-This project is a cooperative effort, and we need your help to make it
-grow! Please get in touch with us on @email{guix-devel@@gnu.org} and
-@code{#guix} on the Freenode IRC network. We welcome ideas, bug
-reports, patches, and anything that may be helpful to the project. We
-particularly welcome help on packaging (@pxref{Packaging Guidelines}).
-
-Please see the
-@url{http://git.savannah.gnu.org/cgit/guix.git/tree/HACKING,
-@file{HACKING} file} that comes with the Guix source code for practical
-details about contributions.
-
+@include contributing.texi
@c *********************************************************************
@node Acknowledgments