Enrich commits with full data in CommitCollection

Allow incomplete commit records to load their full data from gitaly.

Commits can be based on a Hash of data retrieved from PostgreSQL, and
this data can be intentionally incomplete in order to save space.

A new method #gitaly? has been added to Gitlab::Git::Commit, which
returns true if the underlying data source of the Commit is a
Gitaly::GitCommit.

CommitCollection now has a method #enrich which replaces non-gitaly
commits in place with commits from gitaly.

CommitCollection#without_merge_commits has been updated to call this
method, as in order to determine a merge commit we need to have parent
data.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/58805

1 files changed, 12 insertions, 0 deletions

diff --git a/spec/lib/gitlab/git/commit_spec.rb b/spec/lib/gitlab/git/commit_spec.rb
index 3fb41a626b2..4a4ac833e39 100644
--- a/spec/lib/gitlab/git/commit_spec.rb
+++ b/spec/lib/gitlab/git/commit_spec.rb
@@ -537,6 +537,18 @@ describe Gitlab::Git::Commit, :seed_helper do
     end
   end
 
+  describe '#gitaly_commit?' do
+    context 'when the commit data comes from gitaly' do
+      it { expect(commit.gitaly_commit?).to eq(true) }
+    end
+
+    context 'when the commit data comes from a Hash' do
+      let(:commit) { described_class.new(repository, sample_commit_hash) }
+
+      it { expect(commit.gitaly_commit?).to eq(false) }
+    end
+  end
+
   describe '#has_zero_stats?' do
     it { expect(commit.has_zero_stats?).to eq(false) }
   end