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|
#!/usr/bin/perl -w
#
# Copyright (c) 2005 Junio C Hamano
#
# Read .git/FETCH_HEAD and make a human readable merge message
# by grouping branches and tags together to form a single line.
use strict;
my @src;
my %src;
sub andjoin {
my ($label, $labels, $stuff) = @_;
my $l = scalar @$stuff;
my $m = '';
if ($l == 0) {
return ();
}
if ($l == 1) {
$m = "$label$stuff->[0]";
}
else {
$m = ("$labels" .
join (', ', @{$stuff}[0..$l-2]) .
" and $stuff->[-1]");
}
return ($m);
}
sub repoconfig {
my $val;
eval {
my $pid = open(my $fh, '-|');
if (!$pid) {
exec('git-repo-config', '--get', 'merge.summary');
}
($val) = <$fh>;
close $fh;
};
return $val;
}
sub current_branch {
my $fh;
my $pid = open($fh, '-|');
die "$!" unless defined $pid;
if (!$pid) {
exec('git-symbolic-ref', 'HEAD') or die "$!";
}
my ($bra) = <$fh>;
chomp($bra);
close $fh or die "$!";
$bra =~ s|^refs/heads/||;
if ($bra ne 'master') {
$bra = " into $bra";
} else {
$bra = "";
}
return $bra;
}
sub shortlog {
my ($tip) = @_;
my ($fh, @result);
my $pid = open($fh, '-|');
die "$!" unless defined $pid;
if (!$pid) {
exec('git-log', '--topo-order',
'--pretty=oneline', $tip, '^HEAD') or die "$!";
}
while (<$fh>) {
s/^[0-9a-f]{40}\s+//;
push @result, $_;
}
close $fh or die "$!";
return @result;
}
my @origin = ();
while (<>) {
my ($bname, $tname, $gname, $src, $sha1, $origin);
chomp;
s/^([0-9a-f]*) //;
$sha1 = $1;
next if (/^not-for-merge/);
s/^ //;
if (s/ of (.*)$//) {
$src = $1;
} else {
# Pulling HEAD
$src = $_;
$_ = 'HEAD';
}
if (! exists $src{$src}) {
push @src, $src;
$src{$src} = {
BRANCH => [],
TAG => [],
GENERIC => [],
# &1 == has HEAD.
# &2 == has others.
HEAD_STATUS => 0,
};
}
if (/^branch (.*)$/) {
$origin = $1;
push @{$src{$src}{BRANCH}}, $1;
$src{$src}{HEAD_STATUS} |= 2;
}
elsif (/^tag (.*)$/) {
$origin = $_;
push @{$src{$src}{TAG}}, $1;
$src{$src}{HEAD_STATUS} |= 2;
}
elsif (/^HEAD$/) {
$origin = $src;
$src{$src}{HEAD_STATUS} |= 1;
}
else {
push @{$src{$src}{GENERIC}}, $_;
$src{$src}{HEAD_STATUS} |= 2;
$origin = $src;
}
if ($src eq '.' || $src eq $origin) {
$origin =~ s/^'(.*)'$/$1/;
push @origin, [$sha1, "$origin"];
}
else {
push @origin, [$sha1, "$origin of $src"];
}
}
my @msg;
for my $src (@src) {
if ($src{$src}{HEAD_STATUS} == 1) {
# Only HEAD is fetched, nothing else.
push @msg, $src;
next;
}
my @this;
if ($src{$src}{HEAD_STATUS} == 3) {
# HEAD is fetched among others.
push @this, andjoin('', '', ['HEAD']);
}
push @this, andjoin("branch ", "branches ",
$src{$src}{BRANCH});
push @this, andjoin("tag ", "tags ",
$src{$src}{TAG});
push @this, andjoin("commit ", "commits ",
$src{$src}{GENERIC});
my $this = join(', ', @this);
if ($src ne '.') {
$this .= " of $src";
}
push @msg, $this;
}
my $into = current_branch();
print "Merge ", join("; ", @msg), $into, "\n";
if (!repoconfig) {
exit(0);
}
# We limit the merge message to the latst 20 or so per each branch.
my $limit = 20;
for (@origin) {
my ($sha1, $name) = @$_;
my @log = shortlog($sha1);
if ($limit + 1 <= @log) {
print "\n* $name: (" . scalar(@log) . " commits)\n";
}
else {
print "\n* $name:\n";
}
my $cnt = 0;
for my $log (@log) {
if ($limit < ++$cnt) {
print " ...\n";
last;
}
print " $log";
}
}
|
