Commit 117a93db authored by Rene Scharfe's avatar Rene Scharfe Committed by Sam Ravnborg
Browse files

kbuild: Use git in scripts/setlocalversion 



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: default avatarRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Acked-by: default avatarRyan Anderson <ryan@michonline.com>
Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
parent 253dfa6e

scripts/setlocalversion

+17 −51
Original line number Diff line number Diff line 
#!/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);

}



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);

usage() {

	echo "Usage: $0 [srctree]" >&2

	exit 1

}

	closedir(D);



	push @LOCALVERSIONS, "g" . substr($head,0,8);

}

cd "${1:-.}" || usage



if ( -d ".git") {

	do_git_checks();

}

# 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



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

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