import: git: Support 'stable-version-regexp' property.

Some packages (eg: xfce4-panel) use even number for minor version to indicate
a stable release, when refresh such packages to latest versions we'd like them
to be stable ones.  Introduce 'stable-version-regexp' as a package property,
so that unwanted releases can be filtered out.

* doc/guix.texi (Invoking guix refresh): Document 'stable-version-regexp'.
* guix/import/git.scm (import-git-release): Filter out unstable releases when
target-version is unset but 'stable-version-regexp' is available.

Change-Id: I7bbb2cb41b19175a7e3fb79e00cd8dbb20d049ad

1 files changed, 4 insertions, 0 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 30c91d0df9d..17d4bdd23a8 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -16124,6 +16124,10 @@ the tag name for separating the numbers of the version.
 pre-releases; to make it also look for pre-releases, set the this
 property to @code{#t}.
 
+@item @code{stable-version-regexp}: a regular expression for matching the
+version string, if specified the updater will pick the latest version from
+matching ones when the @option{--target-version} option is omitted.
+
 @end itemize
 
 @lisp