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# frozen_string_literal: true
module MergeRequests
# Performs the merge between source SHA and the target branch. Instead
# of writing the result to the MR target branch, it targets the `target_ref`.
#
# Ideally this should leave the `target_ref` state with the same state the
# target branch would have if we used the regular `MergeService`, but without
# every side-effect that comes with it (MR updates, mails, source branch
# deletion, etc). This service should be kept idempotent (i.e. can
# be executed regardless of the `target_ref` current state).
#
class MergeToRefService < MergeRequests::MergeBaseService
def execute(merge_request)
@merge_request = merge_request
validate!
commit_id = commit
raise_error('Conflicts detected during merge') unless commit_id
success(commit_id: commit_id)
rescue MergeError, ArgumentError => error
error(error.message)
end
private
def validate!
error_check!
end
def error_check!
super
error =
if !hooks_validation_pass?(merge_request)
hooks_validation_error(merge_request)
elsif source.blank?
'No source for merge'
end
raise_error(error) if error
end
def target_ref
merge_request.merge_ref_path
end
def commit
repository.merge_to_ref(current_user, source, merge_request, target_ref, commit_message)
rescue Gitlab::Git::PreReceiveError => error
raise MergeError, error.message
end
end
end
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