82 lines
3.8 KiB
Ruby
82 lines
3.8 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module MergeRequests
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class CommitMessageGenerator
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def initialize(merge_request:, current_user:)
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@merge_request = merge_request
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@current_user = @merge_request.metrics&.merged_by || @merge_request.merge_user || current_user
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end
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def merge_message
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return unless @merge_request.target_project.merge_commit_template.present?
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replace_placeholders(@merge_request.target_project.merge_commit_template)
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end
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def squash_message
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return unless @merge_request.target_project.squash_commit_template.present?
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replace_placeholders(@merge_request.target_project.squash_commit_template, squash: true)
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end
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private
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attr_reader :merge_request
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attr_reader :current_user
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PLACEHOLDERS = {
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'source_branch' => ->(merge_request, _, _) { merge_request.source_branch.to_s },
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'target_branch' => ->(merge_request, _, _) { merge_request.target_branch.to_s },
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'title' => ->(merge_request, _, _) { merge_request.title },
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'issues' => ->(merge_request, _, _) do
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return if merge_request.visible_closing_issues_for.blank?
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closes_issues_references = merge_request.visible_closing_issues_for.map do |issue|
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issue.to_reference(merge_request.target_project)
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end
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"Closes #{closes_issues_references.to_sentence}"
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end,
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'description' => ->(merge_request, _, _) { merge_request.description },
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'reference' => ->(merge_request, _, _) { merge_request.to_reference(full: true) },
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'first_commit' => -> (merge_request, _, _) { merge_request.first_commit&.safe_message&.strip },
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'first_multiline_commit' => -> (merge_request, _, _) { merge_request.first_multiline_commit&.safe_message&.strip.presence || merge_request.title },
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'url' => ->(merge_request, _, _) { Gitlab::UrlBuilder.build(merge_request) },
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'approved_by' => ->(merge_request, _, _) { merge_request.approved_by_users.map { |user| "Approved-by: #{user.name} <#{user.commit_email_or_default}>" }.join("\n") },
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'merged_by' => ->(_, user, _) { "#{user&.name} <#{user&.commit_email_or_default}>" },
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'co_authored_by' => ->(merge_request, merged_by, squash) do
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commit_author = squash ? merge_request.author : merged_by
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merge_request.recent_commits
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.to_h { |commit| [commit.author_email, commit.author_name] }
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.except(commit_author&.commit_email_or_default)
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.map { |author_email, author_name| "Co-authored-by: #{author_name} <#{author_email}>" }
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.join("\n")
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end
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}.freeze
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PLACEHOLDERS_COMBINED_REGEX = /%{(#{Regexp.union(PLACEHOLDERS.keys)})}/.freeze
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def replace_placeholders(message, squash: false)
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# Convert CRLF to LF.
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message = message.delete("\r")
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used_variables = message.scan(PLACEHOLDERS_COMBINED_REGEX).map { |value| value[0] }.uniq
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values = used_variables.to_h do |variable_name|
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["%{#{variable_name}}", PLACEHOLDERS[variable_name].call(merge_request, current_user, squash)]
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end
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names_of_empty_variables = values.filter_map { |name, value| name if value.blank? }
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# Remove lines that contain empty variable placeholder and nothing else.
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if names_of_empty_variables.present?
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# If there is blank line or EOF after it, remove blank line before it as well.
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message = message.gsub(/\n\n#{Regexp.union(names_of_empty_variables)}(\n\n|\Z)/, '\1')
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# Otherwise, remove only the line it is in.
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message = message.gsub(/^#{Regexp.union(names_of_empty_variables)}\n/, '')
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end
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# Substitute all variables with their values.
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message = message.gsub(Regexp.union(values.keys), values) if values.present?
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message
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end
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end
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end
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end
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