+++ /dev/null
-#!/usr/bin/perl -w
-#
-# Copyright (c) 2005 Martin Langhoff
-#
-# Walk the tags and find if they match a commit
-# expects a SHA1 of a commit. Option -t enables
-# searching trees too.
-#
-
-use strict;
-use File::Basename;
-use File::Find;
-use Getopt::Std;
-
-my $git_dir = $ENV{GIT_DIR} || '.git';
-$git_dir =~ s|/$||; # chomp trailing slash
-
-# options
-our $opt_t;
-getopts("t") || usage();
-
-my @tagfiles = `find $git_dir/refs/tags -follow -type f`; # haystack
-my $target = shift @ARGV; # needle
-unless ($target) {
- usage();
-}
-
-# drive the processing from the find hook
-# slower, safer (?) than the find utility
-find( { wanted => \&process,
- no_chdir => 1,
- follow => 1,
- }, "$git_dir/refs/tags");
-
-
-sub process {
- my ($dev,$ino,$mode,$nlink,$uid,$gid);
-
- # process only regular files
- unless ((($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) && -f _) {
- return 1; # ignored anyway
- }
-
- my $tagfile = $_;
- chomp $tagfile;
- my $tagname = substr($tagfile, length($git_dir.'/refs/tags/'));
-
- my $tagid = quickread($tagfile);
- chomp $tagid;
-
- # is it just a soft tag?
- if ($tagid eq $target) {
- print "$tagname\n";
- return 1; # done with this tag
- }
-
- # grab the first 2 lines (the whole tag could be large)
- my $tagobj = `git-cat-file tag $tagid | head -n2 `;
- if ($tagobj =~ m/^type commit$/m) { # only deal with commits
-
- if ($tagobj =~ m/^object $target$/m) { # match on the commit
- print "$tagname\n";
-
- } elsif ( $opt_t && # follow the commit
- $tagobj =~ m/^object (\S+)$/m) { # and try to match trees
- my $commitid = $1;
- my $commitobj = `git-cat-file commit $commitid | head -n1`;
- chomp $commitobj;
- $commitobj =~ m/^tree (\S+)$/;
- my $treeid = $1;
- if ($target eq $treeid) {
- print "$tagname\n";
- }
- }
- }
-}
-
-sub quickread {
- my $file = shift;
- local $/; # undef: slurp mode
- open FILE, "<$file"
- or die "Cannot open $file : $!";
- my $content = <FILE>;
- close FILE;
- return $content;
-}
-
-sub usage {
- print STDERR <<END;
-Usage: ${\basename $0} # find tags for a commit or tree
- [ -t ] <commit-or-tree-sha1>
-END
- exit(1);
-}