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linux-next/scripts/setlocalversion
Ryan Anderson aaebf43320 [PATCH] kbuild: automatically append a short string to the version based upon the git commit
If CONFIG_AUTO_LOCALVERSION is set, the user is using a git-based tree, and the
current HEAD is not referred to by any tags in .git/refs/tags/, append -g and
the first 8 characters of the commit to the version string.  This makes it
easier to use git-bisect, and/or to do a daily build, without trampling on your
older, working builds, or accidentally setting up conflicting sets of modules.

Signed-off-by: Ryan Anderson <ryan@michonline.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2005-08-10 21:11:23 +02:00

57 lines
1.3 KiB
Perl

#!/usr/bin/perl
# Copyright 2004 - Ryan Anderson <ryan@michonline.com> GPL v2
use strict;
use warnings;
use Digest::MD5;
require 5.006;
if (@ARGV != 1) {
print <<EOT;
Usage: setlocalversion <srctree>
EOT
exit(1);
}
my ($srctree) = @ARGV;
chdir($srctree);
my @LOCALVERSIONS = ();
# We are going to use the following commands to try and determine if this
# repository is at a Version boundary (i.e, 2.6.10 vs 2.6.10 + some patches) We
# currently assume that all meaningful version boundaries are marked by a tag.
# We don't care what the tag is, just that something exists.
# Git/Cogito store the top-of-tree "commit" in .git/HEAD
# A list of known tags sits in .git/refs/tags/
#
# The simple trick here is to just compare the two of these, and if we get a
# match, return nothing, otherwise, return a subset of the SHA-1 hash in
# .git/HEAD
sub do_git_checks {
open(H,"<.git/HEAD") or return;
my $head = <H>;
chomp $head;
close(H);
opendir(D,".git/refs/tags") or return;
foreach my $tagfile (grep !/^\.{1,2}$/, readdir(D)) {
open(F,"<.git/refs/tags/" . $tagfile) or return;
my $tag = <F>;
chomp $tag;
close(F);
return if ($tag eq $head);
}
closedir(D);
push @LOCALVERSIONS, "g" . substr($head,0,8);
}
if ( -d ".git") {
do_git_checks();
}
printf "-%s\n", join("-",@LOCALVERSIONS) if (scalar @LOCALVERSIONS > 0);