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# frozen_string_literal: true
module Gitlab
module Git
# Represents a tree-ish object for git diff-tree command
# See: https://git-scm.com/docs/git-diff-tree
class DiffTree
attr_reader :left_tree_id, :right_tree_id
def initialize(left_tree_id, right_tree_id)
@left_tree_id = left_tree_id
@right_tree_id = right_tree_id
end
def self.from_commit(commit)
return unless commit.tree_id
parent_tree_id =
if commit.parent_ids.blank?
Gitlab::Git::EMPTY_TREE_ID
else
parent_id = commit.parent_ids.first
commit.repository.commit(parent_id).tree_id
end
new(parent_tree_id, commit.tree_id)
end
end
end
end
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