1 files changed, 42 insertions, 0 deletions
diff --git a/lib/PublicInbox/RepobrowseGitPatch.pm b/lib/PublicInbox/RepobrowseGitPatch.pm
new file mode 100644
index 00000000..e8820f72
--- /dev/null
+++ b/lib/PublicInbox/RepobrowseGitPatch.pm
@@ -0,0 +1,42 @@
+# Copyright (C) 2015 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# shows the /patch/ endpoint for git repositories
+# usage: /repo.git/patch?id=COMMIT_ID
+package PublicInbox::RepobrowseGitPatch;
+use strict;
+use warnings;
+use base qw(PublicInbox::RepobrowseBase);
+use PublicInbox::Qspawn;
+
+# try to be educational and show the command-line used in the signature
+my @CMD = qw(format-patch -M --stdout);
+my $sig = '--signature=git '.join(' ', @CMD);
+
+sub call_git_patch {
+        my ($self, $req) = @_;
+        my $git = $req->{repo_info}->{git};
+        my $env = $req->{env};
+        my $q = PublicInbox::RepobrowseGitQuery->new($env);
+        my $id = $q->{id};
+        $id =~ /\A[\w-]+([~\^][~\^\d])*\z/ or $id = 'HEAD';
+
+        # limit scope, don't take extra args to avoid wasting server
+        # resources buffering:
+        my $range = "$id~1..$id^0";
+        my @cmd = ('git', "--git-dir=$git->{git_dir}", @CMD,
+                        $sig." $range", $range, '--');
+        if (defined(my $expath = $req->{expath})) {
+                push @cmd, $expath if $expath ne '';
+        }
+
+        # FIXME: generalize this with other qspawn users
+        my $qsp = PublicInbox::Qspawn->new(\@cmd);
+        $qsp->psgi_return($env, undef, sub {
+                my ($r) = @_;
+                my $h = ['Content-Type', 'text/plain; charset=UTF-8'];
+                $r ? [ 200, $h ] : [ 500, $h, [ "format-patch error\n" ] ];
+        });
+}
+
+1;