45 lines
1.1 KiB
Ruby
45 lines
1.1 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Git
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class MergeBase
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include Gitlab::Utils::StrongMemoize
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def initialize(repository, refs)
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@repository, @refs = repository, refs
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end
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# Returns the SHA of the first common ancestor
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def sha
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if unknown_refs.any?
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raise UnknownRef, "Can't find merge base for unknown refs: #{unknown_refs.inspect}"
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end
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strong_memoize(:sha) do
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@repository.merge_base(*commits_for_refs)
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end
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end
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# Returns the merge base as a Gitlab::Git::Commit
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def commit
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return unless sha
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@commit ||= @repository.commit_by(oid: sha)
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end
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# Returns the refs passed on initialization that aren't found in
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# the repository, and thus cannot be used to find a merge base.
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def unknown_refs
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@unknown_refs ||= Hash[@refs.zip(commits_for_refs)]
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.select { |ref, commit| commit.nil? }.keys
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end
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private
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def commits_for_refs
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@commits_for_refs ||= @repository.commits_by(oids: @refs)
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end
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end
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end
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end
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