repobrowse: simplify command generation for git commands

This shortens the code quite a bit at a negligible performance cost,
and the diffstat agrees.

1 files changed, 2 insertions, 4 deletions

diff --git a/lib/PublicInbox/RepobrowseGitDiff.pm b/lib/PublicInbox/RepobrowseGitDiff.pm
index eb64d1fd..e2b7179f 100644
--- a/lib/PublicInbox/RepobrowseGitDiff.pm
+++ b/lib/PublicInbox/RepobrowseGitDiff.pm
@@ -40,10 +40,8 @@ sub call_git_diff {
         my $id2 = $q->{id2};
 
         my $git = $req->{repo_info}->{git};
-        my $cmd = [ 'git', "--git-dir=$git->{git_dir}", qw(diff-tree
-                        -z --numstat -p --encoding=UTF-8
-                        --no-color -M -B -D -r),
-                        $id2, $id, '--' ];
+        my $cmd = $git->cmd(qw(diff-tree -z --numstat -p --encoding=UTF-8
+                                --no-color -M -B -D -r), $id2, $id, '--');
         my $expath = $req->{expath};
         push @$cmd, $expath if $expath ne '';
         my $o = { nofollow => 1, noindex => 1 };