module MergeRequests class BuildService < MergeRequests::BaseService include Gitlab::Utils::StrongMemoize def execute @params_issue_iid = params.delete(:issue_iid) self.merge_request = MergeRequest.new(params) merge_request.compare_commits = [] merge_request.source_project = find_source_project merge_request.target_project = find_target_project merge_request.target_branch = find_target_branch merge_request.can_be_created = branches_valid? # compare branches only if branches are valid, otherwise # compare_branches may raise an error if merge_request.can_be_created compare_branches assign_title_and_description end merge_request end private attr_accessor :merge_request delegate :target_branch, :target_branch_ref, :target_project, :source_branch, :source_branch_ref, :source_project, :compare_commits, :wip_title, :description, :errors, to: :merge_request def find_source_project return source_project if source_project.present? && can?(current_user, :read_project, source_project) project end def find_target_project return target_project if target_project.present? && can?(current_user, :read_project, target_project) project.default_merge_request_target end def find_target_branch target_branch || target_project.default_branch end def source_branch_specified? params[:source_branch].present? end def target_branch_specified? params[:target_branch].present? end def branches_valid? return false unless source_branch_specified? || target_branch_specified? validate_branches errors.blank? end def compare_branches compare = CompareService.new( source_project, source_branch_ref ).execute( target_project, target_branch_ref ) if compare merge_request.compare_commits = compare.commits merge_request.compare = compare end end def validate_branches add_error('You must select source and target branch') unless branches_present? add_error('You must select different branches') if same_source_and_target? add_error("Source branch \"#{source_branch}\" does not exist") unless source_branch_exists? add_error("Target branch \"#{target_branch}\" does not exist") unless target_branch_exists? end def add_error(message) errors.add(:base, message) end def branches_present? target_branch.present? && source_branch.present? end def same_source_and_target? source_project == target_project && target_branch == source_branch end def source_branch_exists? source_branch.blank? || source_project.commit(source_branch) end def target_branch_exists? target_branch.blank? || target_project.commit(target_branch) end # When your branch name starts with an iid followed by a dash this pattern will be # interpreted as the user wants to close that issue on this project. # # For example: # - Issue 112 exists, title: Emoji don't show up in commit title # - Source branch is: 112-fix-mep-mep # # Will lead to: # - Appending `Closes #112` to the description # - Setting the title as 'Resolves "Emoji don't show up in commit title"' if there is # more than one commit in the MR # def assign_title_and_description assign_title_and_description_from_single_commit assign_title_from_issue if target_project.issues_enabled? || target_project.external_issue_tracker merge_request.title ||= source_branch.titleize.humanize merge_request.title = wip_title if compare_commits.empty? append_closes_description end def append_closes_description return unless issue&.to_reference.present? closes_issue = "Closes #{issue.to_reference}" if description.present? merge_request.description += closes_issue.prepend("\n\n") else merge_request.description = closes_issue end end def assign_title_and_description_from_single_commit commits = compare_commits return unless commits&.count == 1 commit = commits.first merge_request.title ||= commit.title merge_request.description ||= commit.description.try(:strip) end def assign_title_from_issue return unless issue merge_request.title = "Resolve \"#{issue.title}\"" if issue.is_a?(Issue) return if merge_request.title.present? if issue_iid.present? merge_request.title = "Resolve #{issue.to_reference}" branch_title = source_branch.downcase.remove(issue_iid.downcase).titleize.humanize merge_request.title += " \"#{branch_title}\"" if branch_title.present? end end def issue_iid strong_memoize(:issue_iid) do @params_issue_iid || begin id = if target_project.external_issue_tracker source_branch.match(target_project.external_issue_reference_pattern).try(:[], 0) end id || source_branch.match(/\A(\d+)-/).try(:[], 1) end end end def issue @issue ||= target_project.get_issue(issue_iid, current_user) end end end