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-rw-r--r--MANIFEST1
-rw-r--r--lib/PublicInbox/GitAsyncCat.pm2
-rw-r--r--lib/PublicInbox/RepoTree.pm44
-rw-r--r--lib/PublicInbox/WwwCoderepo.pm6
-rw-r--r--t/solver_git.t7
5 files changed, 59 insertions, 1 deletions
diff --git a/MANIFEST b/MANIFEST
index 3626e4d2..c494d6f7 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -311,6 +311,7 @@ lib/PublicInbox/Qspawn.pm
 lib/PublicInbox/Reply.pm
 lib/PublicInbox/RepoAtom.pm
 lib/PublicInbox/RepoSnapshot.pm
+lib/PublicInbox/RepoTree.pm
 lib/PublicInbox/SaPlugin/ListMirror.pm
 lib/PublicInbox/SaPlugin/ListMirror.pod
 lib/PublicInbox/Search.pm
diff --git a/lib/PublicInbox/GitAsyncCat.pm b/lib/PublicInbox/GitAsyncCat.pm
index 2e0725a6..6dda7340 100644
--- a/lib/PublicInbox/GitAsyncCat.pm
+++ b/lib/PublicInbox/GitAsyncCat.pm
@@ -75,7 +75,7 @@ sub ibx_async_cat ($$$$) {
 }
 
 sub async_check ($$$$) {
-        my ($ibx, $oidish, $cb, $arg) = @_;
+        my ($ibx, $oidish, $cb, $arg) = @_; # $ibx may be $ctx
         my $git = $ibx->{git} // $ibx->git;
         $git->check_async($oidish, $cb, $arg);
         $git->{async_chk} //= do {
diff --git a/lib/PublicInbox/RepoTree.pm b/lib/PublicInbox/RepoTree.pm
new file mode 100644
index 00000000..7f2ff206
--- /dev/null
+++ b/lib/PublicInbox/RepoTree.pm
@@ -0,0 +1,44 @@
+# Copyright (C) all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+#
+# cgit-compatible $REPO/tree/[PATH]?h=$tip redirector
+package PublicInbox::RepoTree;
+use v5.12;
+use PublicInbox::ViewDiff qw(uri_escape_path);
+use PublicInbox::GitAsyncCat;
+use PublicInbox::WwwStatic qw(r);
+
+sub tree_30x { # git check_async callback
+        my ($oid, $type, $size, $ctx) = @_;
+        my $wcb = delete $ctx->{-wcb};
+        return $wcb->(r(404)) if $type eq 'missing';
+        my $u = $ctx->{git}->base_url($ctx->{env});
+        my $path = uri_escape_path(delete $ctx->{-path});
+        $u .= "$oid/s/?b=$path";
+        $wcb->([ 302, [ Location => $u, 'Content-Type' => 'text/plain' ],
+                [ "Redirecting to $u\n" ] ])
+}
+
+sub srv_tree {
+        my ($ctx, $path) = @_;
+        return if index($path, '//') >= 0 || index($path, '/') == 0;
+        my $tip = $ctx->{qp}->{h} // 'HEAD';
+        $path =~ s!/\z!!;
+        my $obj = $ctx->{-obj} = "$tip:$path";
+        $ctx->{-path} = $path;
+
+        # "\n" breaks with `git cat-file --batch-check', and there's no
+        # legitimate use of "\n" in filenames anyways.
+        return if index($obj, "\n") >= 0;
+        sub {
+                $ctx->{-wcb} = $_[0]; # HTTP::{Chunked,Identity}
+                if ($ctx->{env}->{'pi-httpd.async'}) {
+                        async_check($ctx, $obj, \&tree_30x, $ctx);
+                } else {
+                        $ctx->{git}->check_async($obj, \&tree_30x, $ctx);
+                        $ctx->{git}->async_wait_all;
+                }
+        };
+}
+
+1;
diff --git a/lib/PublicInbox/WwwCoderepo.pm b/lib/PublicInbox/WwwCoderepo.pm
index 2fba0cd0..668b6398 100644
--- a/lib/PublicInbox/WwwCoderepo.pm
+++ b/lib/PublicInbox/WwwCoderepo.pm
@@ -18,6 +18,7 @@ use PublicInbox::Hval qw(ascii_html);
 use PublicInbox::ViewDiff qw(uri_escape_path);
 use PublicInbox::RepoSnapshot;
 use PublicInbox::RepoAtom;
+use PublicInbox::RepoTree;
 
 my $EACH_REF = "git for-each-ref --sort=-creatordate --format='%(HEAD)%00".
         join('%00', map { "%($_)" }
@@ -226,6 +227,11 @@ sub srv { # endpoint called by PublicInbox::WWW
                         ($ctx->{git} = $cr->{$1}) and
                 return PublicInbox::ViewVCS::show($ctx, $2);
 
+        if ($path_info =~ m!\A/(.+?)/tree/(.*)\z! and
+                        ($ctx->{git} = $cr->{$1})) {
+                return PublicInbox::RepoTree::srv_tree($ctx, $2) // r(404);
+        }
+
         # snapshots:
         if ($path_info =~ m!\A/(.+?)/snapshot/([^/]+)\z! and
                         ($ctx->{git} = $cr->{$1})) {
diff --git a/t/solver_git.t b/t/solver_git.t
index 89ed0362..5519fa18 100644
--- a/t/solver_git.t
+++ b/t/solver_git.t
@@ -381,6 +381,13 @@ EOF
                         $res = $cb->(GET('/public-inbox/atom/README.md'));
                         is($res->code, 404, '404 on non-existent file Atom feed');
                 }
+
+                $res = $cb->(GET('/public-inbox/tree/'));
+                is($res->code, 302, 'got redirect');
+                $res = $cb->(GET('/public-inbox/tree/README'));
+                is($res->code, 302, 'got redirect for regular file');
+                $res = $cb->(GET('/public-inbox/tree/Documentation'));
+                is($res->code, 302, 'got redirect for directory');
         };
         test_psgi(sub { $www->call(@_) }, $client);
         my $env = { PI_CONFIG => $cfgpath, TMPDIR => $tmpdir };