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doc: Add reference for ‘git-version’ and ‘hg-version’. 

* doc/contributing.texi (Version Numbers): Document ‘git-version’ and
  ‘hg-version’.
* doc/guix.texi (package Reference): Reference ‘Version Numbers’ section for
  version naming guidelines.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
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Xinglu Chen 2021-06-06 12:37:23 +02:00 committed by Ludovic Courtès
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@ -532,9 +532,11 @@ It is a good idea to strip commit identifiers in the @code{version}
field to, say, 7 digits. It avoids an aesthetic annoyance (assuming
aesthetics have a role to play here) as well as problems related to OS
limits such as the maximum shebang length (127 bytes for the Linux
kernel). It is best to use the full commit identifiers in
@code{origin}s, though, to avoid ambiguities. A typical package
definition may look like this:
kernel). There are helper functions for doing this for packages using
@code{git-fetch} or @code{hg-fetch} (see below). It is best to use the
full commit identifiers in @code{origin}s, though, to avoid ambiguities.
A typical package definition may look like this:
@lisp
(define my-package
@ -553,6 +555,20 @@ definition may look like this:
)))
@end lisp
@deffn {Scheme Procedure} git-version @var{VERSION} @var{REVISION} @var{COMMIT}
Return the version string for packages using @code{git-fetch}.
@lisp
(git-version "0.2.3" "0" "93818c936ee7e2f1ba1b315578bde363a7d43d05")
@result{} "0.2.3-0.93818c9"
@end lisp
@end deffn
@deffn {Scheme Procedure} hg-version @var{VERSION} @var{REVISION} @var{CHANGESET}
Return the version string for packages using @code{hg-fetch}. It works
in the same way as @code{git-version}.
@end deffn
@node Synopses and Descriptions
@subsection Synopses and Descriptions

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doc/guix.texi
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@ -89,6 +89,7 @@ Copyright @copyright{} 2020 Jonathan Brielmaier@*
Copyright @copyright{} 2020 Edgar Vincent@*
Copyright @copyright{} 2021 Maxime Devos@*
Copyright @copyright{} 2021 B. Wilson@*
Copyright @copyright{} 2021 Xinglu Chen@*
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
@ -6657,7 +6658,8 @@ This is the data type representing a package recipe.
The name of the package, as a string.
@item @code{version}
The version of the package, as a string.
The version of the package, as a string. @xref{Version Numbers}, for
guidelines.
@item @code{source}
An object telling how the source code for the package should be