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-rwxr-xr-xgit-fmt-merge-msg.perl79
1 files changed, 77 insertions, 2 deletions
diff --git a/git-fmt-merge-msg.perl b/git-fmt-merge-msg.perl
index 778388e..0467a38 100755
--- a/git-fmt-merge-msg.perl
+++ b/git-fmt-merge-msg.perl
@@ -27,10 +27,47 @@ sub andjoin {
return ($m);
}
+sub repoconfig {
+ my $fh;
+ my $val;
+ eval {
+ open $fh, '-|', 'git-repo-config', '--get', 'merge.summary'
+ or die "$!";
+ ($val) = <$fh>;
+ close $fh;
+ };
+ return $val;
+}
+
+sub mergebase {
+ my ($other) = @_;
+ my $fh;
+ open $fh, '-|', 'git-merge-base', '--all', 'HEAD', $other or die "$!";
+ my (@mb) = map { chomp; $_ } <$fh>;
+ close $fh or die "$!";
+ return @mb;
+}
+
+sub shortlog {
+ my ($tip, $limit, @base) = @_;
+ my ($fh, @result);
+ open $fh, '-|', ('git-log', "--max-count=$limit", '--topo-order',
+ '--pretty=oneline', $tip, map { "^$_" } @base)
+ 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, $src);
+ my ($bname, $tname, $gname, $src, $sha1, $origin);
chomp;
- s/^[0-9a-f]* //;
+ s/^([0-9a-f]*) //;
+ $sha1 = $1;
next if (/^not-for-merge/);
s/^ //;
if (s/ of (.*)$//) {
@@ -52,19 +89,30 @@ while (<>) {
};
}
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"];
}
}
@@ -93,3 +141,30 @@ for my $src (@src) {
push @msg, $this;
}
print "Merge ", join("; ", @msg), "\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 @mb = mergebase($sha1);
+ my @log = shortlog($sha1, $limit + 1, @mb);
+ if ($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";
+ }
+}