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# frozen_string_literal: true
module MergeRequests
class CleanupRefsService
include BaseServiceUtility
TIME_THRESHOLD = 14.days
attr_reader :merge_request
def self.schedule(merge_request)
merge_request.create_cleanup_schedule(scheduled_at: TIME_THRESHOLD.from_now)
end
def initialize(merge_request)
@merge_request = merge_request
@repository = merge_request.project.repository
@ref_path = merge_request.ref_path
@merge_ref_path = merge_request.merge_ref_path
@ref_head_sha = @repository.commit(merge_request.ref_path)&.id
@merge_ref_sha = merge_request.merge_ref_head&.id
end
def execute
return error("Merge request is not scheduled to be cleaned up yet.") unless scheduled?
return error("Merge request has not been closed nor merged for #{TIME_THRESHOLD.inspect}.") unless eligible?
# Ensure that commit shas of refs are kept around so we won't lose them when GC runs.
keep_around
return error('Failed to create keep around refs.') unless kept_around?
return error('Failed to cache merge ref sha.') unless cache_merge_ref_sha
delete_refs if repository.exists?
return error('Failed to update schedule.') unless update_schedule
success
end
private
attr_reader :repository, :ref_path, :merge_ref_path, :ref_head_sha, :merge_ref_sha
def scheduled?
merge_request.cleanup_schedule.present? && merge_request.cleanup_schedule.scheduled_at <= Time.current
end
def eligible?
return met_time_threshold?(merge_request.metrics&.latest_closed_at) if merge_request.closed?
merge_request.merged? && met_time_threshold?(merge_request.metrics&.merged_at)
end
def met_time_threshold?(attr)
attr.nil? || attr.to_i <= TIME_THRESHOLD.ago.to_i
end
def kept_around?
service = Gitlab::Git::KeepAround.new(repository)
[ref_head_sha, merge_ref_sha].compact.all? do |sha|
service.kept_around?(sha)
end
end
def keep_around
repository.keep_around(ref_head_sha, merge_ref_sha)
end
def cache_merge_ref_sha
return true if merge_ref_sha.nil?
# Caching the merge ref sha is needed before we delete the merge ref so
# we can still show the merge ref diff (via `MergeRequest#merge_ref_head`)
merge_request.update_column(:merge_ref_sha, merge_ref_sha)
end
def delete_refs
repository.delete_refs(ref_path, merge_ref_path)
end
def update_schedule
merge_request.cleanup_schedule.update(completed_at: Time.current)
end
end
end
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