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kbuild: Use git in scripts/setlocalversion

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Currently scripts/setlocalversion is a Perl script that tries to figure
out the current git commit ID of a repo without using git.  It also
imports Digest::MD5 without using it and generally is too big for the
small task it does. :]  And it always reports a git ID, even when the
HEAD is tagged -- this is a bug.

This patch replaces it with a Bourne Shell script that uses git
commands to do the same.  I can't come up with a scenario where someone
would use a git repo and refuse to install git core at the same time,
so I think it's reasonable to assume git is available.

The new script also reports uncommitted changes by adding -git_dirty to
the version string.  Obviously you can't see from that _what_ has been
changed from the last commit, so it's more of a reminder that you
forgot to commit something.

The script is easily extensible: simply add a check for Mercurial (or
whatever) below the git check.

Note: the script doesn't print a newline char anymore.  That's only
because it was easier to implement it that way, not a feature (or bug).
'make kernelrelease' doesn't care.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Acked-by: Ryan Anderson <ryan@michonline.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Rene Scharfe 2006-01-04 20:42:03 +01:00 committed by Sam Ravnborg
parent 253dfa6e46
commit 117a93db1d
1 changed files with 17 additions and 51 deletions
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68
scripts/setlocalversion
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@ -1,56 +1,22 @@
#!/usr/bin/perl
# Copyright 2004 - Ryan Anderson <ryan@michonline.com> GPL v2
#!/bin/sh
# Print additional version information for non-release trees.
use strict;
use warnings;
use Digest::MD5;
require 5.006;
if (@ARGV != 1) {
print <<EOT;
Usage: setlocalversion <srctree>
EOT
exit(1);
usage() {
echo "Usage: $0 [srctree]" >&2
exit 1
}
my ($srctree) = @ARGV;
chdir($srctree);
cd "${1:-.}" || usage
my @LOCALVERSIONS = ();
# Check for git and a git repo.
if head=`git rev-parse --verify HEAD 2>/dev/null`; then
# Do we have an untagged version?
if [ "`git name-rev --tags HEAD`" = "HEAD undefined" ]; then
printf '%s%s' -g `echo "$head" | cut -c1-8`
fi
# 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);
# Are there uncommitted changes?
if git diff-files | read dummy; then
printf '%s' -git_dirty
fi
fi