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# frozen_string_literal: true
module ExtractsRef
class RequestedRef
include Gitlab::Utils::StrongMemoize
SYMBOLIC_REF_PREFIX = %r{((refs/)?(heads|tags)/)+}
def initialize(repository, ref_type:, ref:)
@ref_type = ref_type
@ref = ref
@repository = repository
end
attr_reader :repository, :ref_type, :ref
def find
case ref_type
when 'tags'
{ ref_type: ref_type, commit: tag }
when 'heads'
{ ref_type: ref_type, commit: branch }
else
commit_without_ref_type
end
end
private
def commit_without_ref_type
if commit.nil?
{ ref_type: nil, commit: nil }
elsif commit.id == ref
# ref is probably complete 40 character sha
{ ref_type: nil, commit: commit }
elsif tag.present?
{ ref_type: 'tags', commit: tag, ambiguous: branch.present? }
elsif branch.present?
{ ref_type: 'heads', commit: branch }
else
{ ref_type: nil, commit: commit, ambiguous: ref.match?(SYMBOLIC_REF_PREFIX) }
end
end
def commit
repository.commit(ref)
end
strong_memoize_attr :commit
def tag
return unless repository.tag_exists?(ref)
raw_commit = repository.find_tag(ref)&.dereferenced_target
::Commit.new(raw_commit, repository.container) if raw_commit
end
strong_memoize_attr :tag
def branch
return unless repository.branch_exists?(ref)
raw_commit = repository.find_branch(ref)&.dereferenced_target
::Commit.new(raw_commit, repository.container) if raw_commit
end
strong_memoize_attr :branch
end
end
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