1#!/usr/bin/perl
2
3# given a perforce change number, output the equivalent git commit id
4# with -c, checks out the specified commit
5
6die "usage: $0 [-c|--checkout] [git-log-options] changenum" unless @ARGV;
7
8my $num = 1;
9my $checkout = 0;
10
11my $before = '--before=2008-12-18'; # only changes made under perforce
12
13for (@ARGV) {
14	m{^\d+$} && (($change,$_) = ($_,undef));
15	m{^-\d+$} && (($num,$_) = (-$_,undef));
16	$_ eq '-c' || $_ eq '--checkout'
17	    and $checkout = 1;
18}
19
20my $grep = "--grep=^p4raw-id:.*\@$change\$";
21@ARGV = grep { defined } @ARGV;
22
23if ($checkout) {
24    my $commit = qx(git rev-list -1 --all $before '$grep');
25    chomp $commit;
26    die "no commit found" unless $commit;
27    system(git => checkout => $commit);
28}
29else {
30    if ( -t STDOUT or @ARGV ) {
31	system(qw(git log), $grep, "-$num", "--all", $before, @ARGV);
32    }
33    else {
34	system(qw(git rev-list -1 --all), $before, $grep);
35    }
36}
37