From ee4b0453d224c5b5ad7619e1b614390860eac441 Mon Sep 17 00:00:00 2001
From: benjamin wil <benjamin@super.gd>
Date: Sun, 5 May 2024 19:41:28 -0700
Subject: [PATCH] Get all directory entries at the given SHA

This commit adds Gollum-formatted entries that represent the directory
tree of the repository at the given SHA. For example, using the Gollum
`lotr.git` test wiki, we get the following array back:

    @repo.lstree_all_directories(sha)
    =>
    [{:sha=>"6e48abfc56565574859e081ee58eae655d48cf71",
      :mode=>16384,
      :type=>"tree",
      :name=>"Gondor",
      :path=>"Gondor"},
     {:sha=>"760982a3b84987919b99748d87c7890bb54afd07",
      :mode=>16384,
      :type=>"tree",
      :name=>"Mordor",
      :path=>"Mordor"},
     {:sha=>"a13e77aca82edd8e6bd4096e351627859f74ffec",
      :mode=>16384,
      :type=>"tree",
      :name=>"Rivendell",
      :path=>"Rivendell"}]

In subsequent commits to `gollum` and `gollum-lib`, using this method
can help us make Gollum's "Overview" page more performant for large
wikis.

Currently, Gollum has no mechanism for getting the directory tree of
the git repository, meaning we have to reverse-engineer the directory
tree by using the paths of files checked into the repository.
---
 lib/rugged_adapter/git_layer_rugged.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/rugged_adapter/git_layer_rugged.rb b/lib/rugged_adapter/git_layer_rugged.rb
index 18bdb2b..2187628 100644
--- a/lib/rugged_adapter/git_layer_rugged.rb
+++ b/lib/rugged_adapter/git_layer_rugged.rb
@@ -659,6 +659,12 @@ def lstree(sha, options = {})
         results
       end
 
+      def lstree_all_directories(sha)
+        @repo.lookup(sha).tree.each_tree.map { |rugged_tree_entry|
+          ::Gollum::Git::Tree.tree_entry_from_rugged_hash rugged_tree_entry
+        }
+      end
+
       def path
         @repo.path
       end