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authorMaxim Cournoyer <maxim.cournoyer@gmail.com>2020-12-16 14:31:12 -0500
committerMaxim Cournoyer <maxim.cournoyer@gmail.com>2020-12-17 00:51:49 -0500
commit15fba3b13d543bbc1f13907e659c354a5b6f28ec (patch)
tree515585cf073460ee317193b06af500eba5080763 /doc/contributing.texi
parentb97a533a485461e7e554fdd2395df99c213b5429 (diff)
downloadguix-15fba3b13d543bbc1f13907e659c354a5b6f28ec.tar
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doc: Add Emacs packaging guidelines.
* doc/contributing.texi (Emacs Packages): New subsection.
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diff --git a/doc/contributing.texi b/doc/contributing.texi
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@@ -391,6 +391,7 @@ needed is to review and apply the patch.
* Version Numbers:: When the name is not enough.
* Synopses and Descriptions:: Helping users find the right package.
* Snippets versus Phases:: Whether to use a snippet, or a build phase.
+* Emacs Packages:: Your Elisp fix.
* Python Modules:: A touch of British comedy.
* Perl Modules:: Little pearls.
* Java Packages:: Coffee break.
@@ -636,6 +637,46 @@ embed store items in the sources; such patching should rather be done
using build phases. Refer to the @code{origin} record documentation for
more information (@pxref{origin Reference}).
+@node Emacs Packages
+@subsection Emacs Packages
+
+@cindex emacs, packaging
+@cindex elisp, packaging
+Emacs packages should preferably use the Emacs build system
+(@pxref{emacs-build-system}), for uniformity and the benefits provided
+by its build phases, such as the auto-generation of the autoloads file
+and the byte compilation of the sources. Because there are no
+standardized way to run a test suite for Emacs packages, tests are
+disabled by default. When a test suite is available, it should be
+enabled by setting the @code{#:tests?} argument to @code{#true}. By
+default, the command to run the test is @command{make check}, but any
+command can be specified via the @code{#:test-command} argument. The
+@code{#:test-command} argument expects a list containing a command and
+its arguments, to be invoked during the @code{'check} phase.
+
+The Elisp dependencies of Emacs packages are typically provided as
+@code{propagated-inputs} when required at run time. As for other
+packages, build or test dependencies should be specified as
+@code{native-inputs}.
+
+Emacs packages sometimes depend on resources directories that should be
+installed along the Elisp files. The @code{#:include} argument can be
+used for that purpose, by specifying a list of regexps to match. The
+best practice when using the @code{#:include} argument is to extend
+rather than override its default value (accessible via the
+@code{%default-include} variable). As an example, a yasnippet extension
+package typically include a @file{snippets} directory, which could be
+copied to the installation directory using:
+
+@lisp
+#:include (cons "^snippets/" %default-include))
+@end lisp
+
+When encountering problems, it is wise to check for the presence of the
+@code{Package-Requires} extension header in the package main source
+file, and whether any dependencies and their versions listed therein are
+satisfied.
+
@node Python Modules
@subsection Python Modules