Enable RuboCop Style/RegexpLiteral

.rubocop_todo.yml

@@ -704,7 +704,9 @@ Style/RedundantSelf:
 # Configuration parameters: EnforcedStyle, AllowInnerSlashes.
 # SupportedStyles: slashes, percent_r, mixed
 Style/RegexpLiteral:
-  Enabled: false
+  Enabled: true
+  EnforcedStyle: mixed
+  AllowInnerSlashes: false
 # Offense count: 36
 # Cop supports --auto-correct.

app/controllers/help_controller.rb

@@ -5,7 +5,7 @@ class HelpController < ApplicationController
   # Taken from Jekyll
   # https://github.com/jekyll/jekyll/blob/3.5-stable/lib/jekyll/document.rb#L13
-  YAML_FRONT_MATTER_REGEXP = %r!\A(---\s*\n.*?\n?)^((---|\.\.\.)\s*$\n?)!m
+  YAML_FRONT_MATTER_REGEXP = /\A(---\s*\n.*?\n?)^((---|\.\.\.)\s*$\n?)/m
   def index
     # Remove YAML frontmatter so that it doesn't look weird

app/controllers/projects_controller.rb

@@ -403,6 +403,6 @@ class ProjectsController < Projects::ApplicationController
     # to
     #   localhost/group/project
     #
-    redirect_to request.original_url.sub(/\.git\/?\Z/, '') if params[:format] == 'git'
+    redirect_to request.original_url.sub(%r{\.git/?\Z}, '') if params[:format] == 'git'
   end
 end

app/helpers/sidekiq_helper.rb

 module SidekiqHelper
-  SIDEKIQ_PS_REGEXP = /\A
+  SIDEKIQ_PS_REGEXP = %r{\A
     (?<pid>\d+)\s+
     (?<cpu>[\d\.,]+)\s+
     (?<mem>[\d\.,]+)\s+
-    (?<state>[DIEKNRSTVWXZNLpsl\+<>\/\d]+)\s+
+    (?<state>[DIEKNRSTVWXZNLpsl\+<>/\d]+)\s+
     (?<start>.+?)\s+
     (?<command>(?:ruby\d+:\s+)?sidekiq.*\].*)
-    \z/x
+    \z}x
   def parse_sidekiq_ps(line)
     match = line.strip.match(SIDEKIQ_PS_REGEXP)

app/helpers/submodule_helper.rb

@@ -11,7 +11,7 @@ module SubmoduleHelper
       url = File.join(Gitlab.config.gitlab.url, @project.full_path)
     end
-    if url =~ /([^\/:]+)\/([^\/]+(?:\.git)?)\Z/
+    if url =~ %r{([^/:]+)/([^/]+(?:\.git)?)\Z}
       namespace, project = $1, $2
       gitlab_hosts = [Gitlab.config.gitlab.url,
                       Gitlab.config.gitlab_shell.ssh_path_prefix]
@@ -23,7 +23,7 @@ module SubmoduleHelper
         end
       end
-      namespace.sub!(/\A\//, '')
+      namespace.sub!(%r{\A/}, '')
       project.rstrip!
       project.sub!(/\.git\z/, '')
@@ -47,11 +47,11 @@ module SubmoduleHelper
   protected
   def github_dot_com_url?(url)
-    url =~ /github\.com[\/:][^\/]+\/[^\/]+\Z/
+    url =~ %r{github\.com[/:][^/]+/[^/]+\Z}
   end
   def gitlab_dot_com_url?(url)
-    url =~ /gitlab\.com[\/:][^\/]+\/[^\/]+\Z/
+    url =~ %r{gitlab\.com[/:][^/]+/[^/]+\Z}
   end
   def self_url?(url, namespace, project)
@@ -65,7 +65,7 @@ module SubmoduleHelper
   def relative_self_url?(url)
     # (./)?(../repo.git) || (./)?(../../project/repo.git) )
-    url =~ /\A((\.\/)?(\.\.\/))(?!(\.\.)|(.*\/)).*(\.git)?\z/ || url =~ /\A((\.\/)?(\.\.\/){2})(?!(\.\.))([^\/]*)\/(?!(\.\.)|(.*\/)).*(\.git)?\z/
+    url =~ %r{\A((\./)?(\.\./))(?!(\.\.)|(.*/)).*(\.git)?\z} || url =~ %r{\A((\./)?(\.\./){2})(?!(\.\.))([^/]*)/(?!(\.\.)|(.*/)).*(\.git)?\z}
   end
   def standard_links(host, namespace, project, commit)

app/helpers/tree_helper.rb

@@ -110,7 +110,7 @@ module TreeHelper
   # returns the relative path of the first subdir that doesn't have only one directory descendant
   def flatten_tree(root_path, tree)
-    return tree.flat_path.sub(/\A#{root_path}\//, '') if tree.flat_path.present?
+    return tree.flat_path.sub(%r{\A#{root_path}/}, '') if tree.flat_path.present?
     subtree = Gitlab::Git::Tree.where(@repository, @commit.id, tree.path)
     if subtree.count == 1 && subtree.first.dir?

app/models/ci/build.rb

@@ -292,7 +292,7 @@ module Ci
     def repo_url
       auth = "gitlab-ci-token:#{ensure_token!}@"
-      project.http_url_to_repo.sub(/^https?:\/\//) do |prefix|
+      project.http_url_to_repo.sub(%r{^https?://}) do |prefix|
         prefix + auth
       end
     end

app/models/commit_status.rb

@@ -141,7 +141,7 @@ class CommitStatus < ActiveRecord::Base
   end
   def group_name
-    name.to_s.gsub(/\d+[\s:\/\\]+\d+\s*/, '').strip
+    name.to_s.gsub(%r{\d+[\s:/\\]+\d+\s*}, '').strip
   end
   def failed_but_allowed?

app/models/concerns/taskable.rb

@@ -9,13 +9,13 @@ require 'task_list/filter'
 module Taskable
   COMPLETED    = 'completed'.freeze
   INCOMPLETE   = 'incomplete'.freeze
-  ITEM_PATTERN = /
+  ITEM_PATTERN = %r{
     ^
     \s*(?:[-+*]|(?:\d+\.)) # list prefix required - task item has to be always in a list
     \s+                       # whitespace prefix has to be always presented for a list item
     (\[\s\]|\[[xX]\])         # checkbox
     (\s.+)                    # followed by whitespace and some text.
-  /x
+  }x
   def self.get_tasks(content)
     content.to_s.scan(ITEM_PATTERN).map do |checkbox, label|

app/models/environment.rb

@@ -115,7 +115,7 @@ class Environment < ActiveRecord::Base
   def formatted_external_url
     return nil unless external_url
-    external_url.gsub(/\A.*?:\/\//, '')
+    external_url.gsub(%r{\A.*?://}, '')
   end
   def stop_action?

app/models/project.rb

@@ -234,7 +234,7 @@ class Project < ActiveRecord::Base
   validates :creator, presence: true, on: :create
   validates :description, length: { maximum: 2000 }, allow_blank: true
   validates :ci_config_path,
-    format: { without: /(\.{2}|\A\/)/,
+    format: { without: %r{(\.{2}|\A/)},
               message: 'cannot include leading slash or directory traversal.' },
     length: { maximum: 255 },
     allow_blank: true
@@ -1338,7 +1338,7 @@ class Project < ActiveRecord::Base
     host = "#{subdomain}.#{Settings.pages.host}".downcase
     # The host in URL always needs to be downcased
-    url = Gitlab.config.pages.url.sub(/^https?:\/\//) do |prefix|
+    url = Gitlab.config.pages.url.sub(%r{^https?://}) do |prefix|
       "#{prefix}#{subdomain}."
     end.downcase

app/models/project_services/asana_service.rb

@@ -84,7 +84,7 @@ http://app.asana.com/-/account_api'
     # - fix/ed/es/ing
     # - close/s/d
     # - closing
-    issue_finder = /(fix\w*|clos[ei]\w*+)?\W*(?:https:\/\/app\.asana\.com\/\d+\/\d+\/(\d+)|#(\d+))/i
+    issue_finder = %r{(fix\w*|clos[ei]\w*+)?\W*(?:https://app\.asana\.com/\d+/\d+/(\d+)|#(\d+))}i
     message.scan(issue_finder).each do |tuple|
       # tuple will be

app/models/project_services/issue_tracker_service.rb

@@ -10,9 +10,9 @@ class IssueTrackerService < Service
   # overriden patterns. See ReferenceRegexes::EXTERNAL_PATTERN
   def self.reference_pattern(only_long: false)
     if only_long
-      %r{(\b[A-Z][A-Z0-9_]+-)(?<issue>\d+)}
+      /(\b[A-Z][A-Z0-9_]+-)(?<issue>\d+)/
     else
-      %r{(\b[A-Z][A-Z0-9_]+-|#{Issue.reference_prefix})(?<issue>\d+)}
+      /(\b[A-Z][A-Z0-9_]+-|#{Issue.reference_prefix})(?<issue>\d+)/
     end
   end

app/models/project_services/jira_service.rb

@@ -19,7 +19,7 @@ class JiraService < IssueTrackerService
   # {PROJECT-KEY}-{NUMBER} Examples: JIRA-1, PROJECT-1
   def self.reference_pattern(only_long: true)
-    @reference_pattern ||= %r{(?<issue>\b([A-Z][A-Z0-9_]+-)\d+)}
+    @reference_pattern ||= /(?<issue>\b([A-Z][A-Z0-9_]+-)\d+)/
   end
   def initialize_properties

app/models/user.rb

@@ -842,13 +842,13 @@ class User < ActiveRecord::Base
   end
   def full_website_url
-    return "http://#{website_url}" if website_url !~ /\Ahttps?:\/\//
+    return "http://#{website_url}" if website_url !~ %r{\Ahttps?://}
     website_url
   end
   def short_website_url
-    website_url.sub(/\Ahttps?:\/\//, '')
+    website_url.sub(%r{\Ahttps?://}, '')
   end
   def all_ssh_keys

changelogs/unreleased/42497-rubocop-style-regexpliteral.yml

+---
+title: Enable RuboCop Style/RegexpLiteral
+merge_request: 16752
+author: Takuya Noguchi
+type: other

config/initializers/1_settings.rb

@@ -110,7 +110,7 @@ class Settings < Settingslogic
       url = "http://#{url}" unless url.start_with?('http')
       # Get rid of the path so that we don't even have to encode it
-      url_without_path = url.sub(%r{(https?://[^\/]+)/?.*}, '\1')
+      url_without_path = url.sub(%r{(https?://[^/]+)/?.*}, '\1')
       URI.parse(url_without_path).host
     end
@@ -469,10 +469,10 @@ end
 # repository_downloads_path value.
 #
 repositories_storages          = Settings.repositories.storages.values
-repository_downloads_path      = Settings.gitlab['repository_downloads_path'].to_s.gsub(/\/$/, '')
+repository_downloads_path      = Settings.gitlab['repository_downloads_path'].to_s.gsub(%r{/$}, '')
 repository_downloads_full_path = File.expand_path(repository_downloads_path, Settings.gitlab['user_home'])
-if repository_downloads_path.blank? || repositories_storages.any? { |rs| [repository_downloads_path, repository_downloads_full_path].include?(rs['path'].gsub(/\/$/, '')) }
+if repository_downloads_path.blank? || repositories_storages.any? { |rs| [repository_downloads_path, repository_downloads_full_path].include?(rs['path'].gsub(%r{/$}, '')) }
   Settings.gitlab['repository_downloads_path'] = File.join(Settings.shared['path'], 'cache/archive')
 end

config/initializers/active_record_data_types.rb

@@ -54,7 +54,7 @@ elsif Gitlab::Database.mysql?
     def initialize_type_map(mapping)
       super mapping
-      mapping.register_type(%r(timestamp)i) do |sql_type|
+      mapping.register_type(/timestamp/i) do |sql_type|
         precision = extract_precision(sql_type)
         ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter::MysqlDateTimeWithTimeZone.new(precision: precision)
       end

config/routes/admin.rb

 namespace :admin do
-  resources :users, constraints: { id: /[a-zA-Z.\/0-9_\-]+/ } do
+  resources :users, constraints: { id: %r{[a-zA-Z./0-9_\-]+} } do
     resources :keys, only: [:show, :destroy]
     resources :identities, except: [:show]
     resources :impersonation_tokens, only: [:index, :create] do

config/routes/group.rb

@@ -35,7 +35,7 @@ constraints(GroupUrlConstrainer.new) do
       post :toggle_subscription, on: :member
     end
-    resources :milestones, constraints: { id: /[^\/]+/ }, only: [:index, :show, :edit, :update, :new, :create] do
+    resources :milestones, constraints: { id: %r{[^/]+} }, only: [:index, :show, :edit, :update, :new, :create] do
       member do
         get :merge_requests
         get :participants
@@ -52,7 +52,7 @@ constraints(GroupUrlConstrainer.new) do
     resources :uploads, only: [:create] do
       collection do
-        get ":secret/:filename", action: :show, as: :show, constraints: { filename: /[^\/]+/ }
+        get ":secret/:filename", action: :show, as: :show, constraints: { filename: %r{[^/]+} }
       end
     end
   end