in lib/gitlab_git/repository.rb [800:817]
def merge(source_name, target_name, options = {})
our_commit = rugged.branches[target_name].target
their_commit = rugged.branches[source_name].target
raise "Invalid merge target" if our_commit.nil?
raise "Invalid merge source" if their_commit.nil?
merge_index = rugged.merge_commits(our_commit, their_commit)
return false if merge_index.conflicts?
actual_options = options.merge(
parents: [our_commit, their_commit],
tree: merge_index.write_tree(rugged),
update_ref: "refs/heads/#{target_name}"
)
Rugged::Commit.create(rugged, actual_options)
end