PATCH: simplify calls to git programs in git-fmt-merge-msg

It also makes it work on ActiveState Perl.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-fmt-merge-msg.perl b/git-fmt-merge-msg.perl
index c13af48..dae383f 100755 (executable)
--- a/git-fmt-merge-msg.perl
+++ b/git-fmt-merge-msg.perl
@@ -28,28 +28,13 @@ sub andjoin {
 }
 
 sub repoconfig {
-       my $val;
-       eval {
-               my $pid = open(my $fh, '-|');
-               if (!$pid) {
-                       exec('git-repo-config', '--get', 'merge.summary');
-               }
-               ($val) = <$fh>;
-               close $fh;
-       };
+       my ($val) = qx{git-repo-config --get merge.summary};
        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) = <$fh>;
+       my ($bra) = qx{git-symbolic-ref HEAD};
        chomp($bra);
-       close $fh or die "$!";
        $bra =~ s|^refs/heads/||;
        if ($bra ne 'master') {
                $bra = " into $bra";
@@ -61,18 +46,12 @@ sub current_branch {
 
 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>) {
+       my @result;
+       foreach ( qx{git-log --topo-order --pretty=oneline $tip ^HEAD} ) {
                s/^[0-9a-f]{40}\s+//;
                push @result, $_;
        }
-       close $fh or die "$!";
+       die "git-log failed\n" if $?;
        return @result;
 }