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-rw-r--r--lib/gitlab/gitaly_client/commit.rb41
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/gitlab/gitaly_client/commit.rb b/lib/gitlab/gitaly_client/commit.rb
new file mode 100644
index 00000000000..f15faebe27e
--- /dev/null
+++ b/lib/gitlab/gitaly_client/commit.rb
@@ -0,0 +1,41 @@
+module Gitlab
+ module GitalyClient
+ class Commit
+ # The ID of empty tree.
+ # See http://stackoverflow.com/a/40884093/1856239 and https://github.com/git/git/blob/3ad8b5bf26362ac67c9020bf8c30eee54a84f56d/cache.h#L1011-L1012
+ EMPTY_TREE_ID = '4b825dc642cb6eb9a060e54bf8d69288fbee4904'.freeze
+
+ class << self
+ def diff_from_parent(commit, options = {})
+ project = commit.project
+ channel = GitalyClient.get_channel(project.repository_storage)
+ stub = Gitaly::Diff::Stub.new(nil, nil, channel_override: channel)
+ repo = Gitaly::Repository.new(path: project.repository.path_to_repo)
+ parent = commit.parents[0]
+ parent_id = parent ? parent.id : EMPTY_TREE_ID
+ request = Gitaly::CommitDiffRequest.new(
+ repository: repo,
+ left_commit_id: parent_id,
+ right_commit_id: commit.id
+ )
+
+ Gitlab::Git::DiffCollection.new(stub.commit_diff(request), options)
+ end
+
+ def is_ancestor(repository, ancestor_id, child_id)
+ project = Project.find_by_path(repository.path)
+ channel = GitalyClient.get_channel(project.repository_storage)
+ stub = Gitaly::Commit::Stub.new(nil, nil, channel_override: channel)
+ repo = Gitaly::Repository.new(path: repository.path_to_repo)
+ request = Gitaly::CommitIsAncestorRequest.new(
+ repository: repo,
+ ancestor_id: ancestor_id,
+ child_id: child_id
+ )
+
+ stub.commit_is_ancestor(request).value
+ end
+ end
+ end
+ end
+end