2 # This is a generic update hook script for GIT repositories.
3 # Written by Martin Mares <mj@ucw.cz> and placed into public domain.
14 my $subject_prefix = "GIT";
18 'mail-to=s' => \$mail_to,
19 'subject-prefix=s' => \$subject_prefix,
20 'max-diff-size=s' => \$max_diff_size,
21 ) and @ARGV == 3 or die <<AMEN ;
22 Usage: $0 [<options>] <refname> <sha1-old> <sha1-new>
25 --mail-to=<address> Send mail to the given address
26 --max-diff-size=<bytes> If the diff is too long, send just a summary
27 --subject-prefix=<px> Prefix subjects with [<px>] (default: GIT)
30 my ($ref, $old, $new) = @ARGV;
31 $ref =~ s{^refs/heads/}{} or exit 0;
32 $old ne $new or exit 0;
34 my $repo = POSIX::getcwd();
37 my $subj = '[' . $subject_prefix . ($ref eq 'master' ? '' : "/$ref") . ']';
38 my $out = File::Temp->new() or die;
39 my $outname = $out->filename;
42 open STDOUT, '>&', $out or die;
44 my @rev_list_options = ('--pretty', '--no-abbrev', '--date=iso');
45 my @diff_options = ('-C');
48 # Is there any branch pointing to $new ?
49 for (`git branch -v --no-abbrev`) {
51 my ($name, $sha) = /^..(\S+)\s+(\S+)/ or die;
52 if ($name ne $ref && $sha eq $new) {
60 print $out "Most recent commits:\n\n";
61 system 'git', 'rev-list', @rev_list_options, '--max-count=20', $new;
70 # Creation of a branch
71 $subj .= ' Created branch';
72 my $copy_of = scan_branches();
73 if (defined $copy_of) {
74 $subj .= " as a copy of $copy_of";
75 print $out "Created branch $ref as a copy of $copy_of.\n";
77 print $out "Created branch $ref.\n\n";
80 } elsif ($new =~ /^0+$/) {
81 # Deletion of a branch
82 $subj .= ' Branch deleted';
83 print $out "Deleted branch $ref.\n\nPrevious tip was $old.\n";
85 my $lca = `git merge-base $old $new`; die if $?;
89 # Scan all commits first and construct subject
90 my @commits = `git rev-list $old..$new --pretty=oneline --no-abbrev --no-merges`; $? and die;
97 # If there are multiple commits, print an overall diffstat first
100 print $out "Overall diffstat:\n\n";
101 system 'git', 'diff', '--stat', $old, $new;
102 print $out "\nCommits:\n\n";
104 my $pos_after_header = output_size();
106 # Show individual commits with diffs and stats
107 system 'git', 'log', @rev_list_options, '--reverse', @diff_options, '-p', '--stat', "$old..$new";
109 # If the file is too long, truncate it and print just a summary
110 if (defined($max_diff_size) && output_size() > $max_diff_size) {
111 $out->truncate($pos_after_header);
113 print $out "Diff was too long, printing just a summary.\n\n";
114 system 'git', 'log', @rev_list_options, '--reverse', "$old..$new";
116 } elsif ($lca eq $new) {
118 $subj .= ' Branch rewound';
119 print $out "Rewound branch $ref to commit $new.\n\n";
122 # Otherwise it is a rebase
123 $subj .= ' Branch rebased';
124 print $out "Rebased branch $ref to commit $new.\n\n";
125 print $out "Commits from common ancestor:\n\n";
126 system 'git', 'rev-list', @rev_list_options, $new, "^$old";
131 if (defined $mail_to) {
133 open STDIN, '<', $outname;
137 '-e', 'set charset="utf-8"',
138 '-e', 'set send_charset="us-ascii:iso-8859-2:utf-8"',
139 '-e', "my_hdr X-Git-Repo: $repo",
140 '-e', "my_hdr X-Git-Branch: $ref",
141 '-e', "my_hdr X-Git-Old-SHA: $old",
142 '-e', "my_hdr X-Git-New-SHA: $new",
146 print STDERR "Subject: $subj\n\n";