From 181cd299f9e06223e8338e93b1c318c671ccb1aa Mon Sep 17 00:00:00 2001
From: Jacopo <beschi.jacopo@gmail.com>
Date: Tue, 14 Nov 2017 10:02:39 +0100
Subject: Adds Rubocop rule for line break after guard clause

Adds a rubocop rule (with autocorrect) to ensure line break after guard clauses.
---
 app/controllers/application_controller.rb          |   1 +
 app/controllers/autocomplete_controller.rb         |   2 +
 .../import/gitlab_projects_controller.rb           |   1 +
 app/controllers/projects/deployments_controller.rb |   1 +
 app/controllers/projects/group_links_controller.rb |   1 +
 app/controllers/projects/issues_controller.rb      |   1 +
 app/controllers/projects/labels_controller.rb      |   1 +
 app/controllers/projects/lfs_storage_controller.rb |   1 +
 app/controllers/projects/notes_controller.rb       |   1 +
 app/controllers/projects/wikis_controller.rb       |   1 +
 app/controllers/projects_controller.rb             |   1 +
 app/finders/personal_access_tokens_finder.rb       |   1 +
 app/helpers/diff_helper.rb                         |   1 +
 app/helpers/emails_helper.rb                       |   1 +
 app/helpers/markup_helper.rb                       |   1 +
 app/helpers/notifications_helper.rb                |   1 +
 app/helpers/tree_helper.rb                         |   1 +
 app/helpers/visibility_level_helper.rb             |   2 +
 app/models/ci/build.rb                             |   1 +
 app/models/ci/pipeline.rb                          |   2 +
 app/models/clusters/providers/gcp.rb               |   1 +
 app/models/concerns/awardable.rb                   |   1 +
 app/models/pages_domain.rb                         |   5 +
 app/models/project_services/hipchat_service.rb     |   2 +
 app/models/project_services/jira_service.rb        |   1 +
 app/models/project_services/kubernetes_service.rb  |   1 +
 app/models/repository.rb                           |   2 +
 app/models/user.rb                                 |   2 +
 app/services/ci/fetch_kubernetes_token_service.rb  |   1 +
 app/services/labels/promote_service.rb             |   1 +
 app/services/merge_requests/build_service.rb       |   1 +
 .../projects/group_links/destroy_service.rb        |   1 +
 app/services/todo_service.rb                       |   1 +
 app/validators/certificate_key_validator.rb        |   1 +
 app/validators/certificate_validator.rb            |   1 +
 app/workers/irker_worker.rb                        |   1 +
 app/workers/stuck_ci_jobs_worker.rb                |   1 +
 ...18040-rubocop-line-break-after-guard-clause.yml |   5 +
 config/initializers/ar5_batching.rb                |   1 +
 config/initializers/devise.rb                      |   1 +
 config/initializers/omniauth.rb                    |   1 +
 config/initializers/postgresql_cte.rb              |   2 +
 ...70919211300_remove_temporary_ci_builds_index.rb |   1 +
 .../20170406111121_clean_upload_symlinks.rb        |   1 +
 .../20170612071012_move_personal_snippets_files.rb |   1 +
 .../20170613111224_clean_appearance_symlinks.rb    |   1 +
 lib/api/commits.rb                                 |   2 +
 lib/api/helpers/custom_validators.rb               |   1 +
 lib/api/helpers/runner.rb                          |   1 +
 lib/api/runners.rb                                 |   4 +
 lib/api/snippets.rb                                |   1 +
 lib/api/v3/commits.rb                              |   2 +
 lib/api/v3/runners.rb                              |   1 +
 lib/api/v3/snippets.rb                             |   2 +
 lib/banzai/object_renderer.rb                      |   1 +
 lib/banzai/querying.rb                             |   2 +
 lib/banzai/reference_parser/user_parser.rb         |   1 +
 lib/banzai/renderer.rb                             |   2 +
 lib/declarative_policy.rb                          |   2 +
 lib/declarative_policy/base.rb                     |   2 +
 lib/declarative_policy/cache.rb                    |   2 +
 lib/declarative_policy/rule.rb                     |   5 +
 lib/declarative_policy/runner.rb                   |   1 +
 lib/file_size_validator.rb                         |   1 +
 lib/gitlab/changes_list.rb                         |   1 +
 lib/gitlab/ci/build/artifacts/metadata.rb          |   1 +
 lib/gitlab/ci/build/artifacts/metadata/entry.rb    |   3 +
 lib/gitlab/ci/build/image.rb                       |   1 +
 lib/gitlab/ci/config/entry/image.rb                |   1 +
 lib/gitlab/ci/config/entry/validators.rb           |   1 +
 lib/gitlab/daemon.rb                               |   1 +
 lib/gitlab/diff/inline_diff.rb                     |   1 +
 lib/gitlab/diff/parser.rb                          |   1 +
 lib/gitlab/diff/position.rb                        |   1 +
 lib/gitlab/email/handler/unsubscribe_handler.rb    |   1 +
 lib/gitlab/fogbugz_import/client.rb                |   1 +
 lib/gitlab/fogbugz_import/importer.rb              |   2 +
 lib/gitlab/git/blob.rb                             |   1 +
 lib/gitlab/git/repository.rb                       |   3 +
 lib/gitlab/gitaly_client/ref_service.rb            |   1 +
 lib/gitlab/gitaly_client/wiki_service.rb           |   1 +
 lib/gitlab/gitlab_import/client.rb                 |   1 +
 lib/gitlab/kubernetes/namespace.rb                 |   1 +
 lib/gitlab/ldap/authentication.rb                  |   1 +
 lib/gitlab/legacy_github_import/importer.rb        |   1 +
 lib/gitlab/metrics/samplers/ruby_sampler.rb        |   1 +
 lib/gitlab/metrics/subscribers/active_record.rb    |   1 +
 lib/gitlab/middleware/go.rb                        |   1 +
 lib/gitlab/optimistic_locking.rb                   |   1 +
 lib/gitlab/saml/user.rb                            |   1 +
 lib/gitlab/shell.rb                                |   1 +
 lib/gitlab/string_range_marker.rb                  |   1 +
 .../template/finders/repo_template_finder.rb       |   1 +
 lib/gitlab/url_sanitizer.rb                        |   1 +
 lib/gitlab/visibility_level.rb                     |   1 +
 lib/gitlab/workhorse.rb                            |   1 +
 lib/haml_lint/inline_javascript.rb                 |   1 +
 lib/system_check/simple_executor.rb                |   1 +
 lib/tasks/gitlab/cleanup.rake                      |   2 +
 qa/qa/page/main/entry.rb                           |   1 +
 rubocop/cop/line_break_after_guard_clauses.rb      | 100 +++++++++++++
 rubocop/rubocop.rb                                 |   1 +
 spec/factories/notes.rb                            |   1 +
 spec/lib/gitlab/git/diff_collection_spec.rb        |   1 +
 .../project_services/flowdock_service_spec.rb      |   1 +
 spec/requests/api/projects_spec.rb                 |   2 +
 spec/requests/api/v3/projects_spec.rb              |   2 +
 .../cop/line_break_after_guard_clauses_spec.rb     | 160 +++++++++++++++++++++
 spec/services/notification_service_spec.rb         |   2 +
 spec/support/fixture_helpers.rb                    |   1 +
 spec/support/generate-seed-repo-rb                 |   1 +
 spec/support/gitaly.rb                             |   1 +
 spec/unicorn/unicorn_spec.rb                       |   1 +
 113 files changed, 410 insertions(+)
 create mode 100644 changelogs/unreleased/18040-rubocop-line-break-after-guard-clause.yml
 create mode 100644 rubocop/cop/line_break_after_guard_clauses.rb
 create mode 100644 spec/rubocop/cop/line_break_after_guard_clauses_spec.rb

diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 3be7aee69bc..b4cb1bb14e5 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -97,6 +97,7 @@ class ApplicationController < ActionController::Base
   # (e.g. tokens) to authenticate the user, whereas Devise sets current_user
   def auth_user
     return current_user if current_user.present?
+
     return try(:authenticated_user)
   end
 
diff --git a/app/controllers/autocomplete_controller.rb b/app/controllers/autocomplete_controller.rb
index 10e8e54f402..cde1e284d2d 100644
--- a/app/controllers/autocomplete_controller.rb
+++ b/app/controllers/autocomplete_controller.rb
@@ -44,6 +44,7 @@ class AutocompleteController < ApplicationController
       if @project.blank? && params[:group_id].present?
         group = Group.find(params[:group_id])
         return render_404 unless can?(current_user, :read_group, group)
+
         group
       end
     end
@@ -54,6 +55,7 @@ class AutocompleteController < ApplicationController
       if params[:project_id].present?
         project = Project.find(params[:project_id])
         return render_404 unless can?(current_user, :read_project, project)
+
         project
       end
     end
diff --git a/app/controllers/import/gitlab_projects_controller.rb b/app/controllers/import/gitlab_projects_controller.rb
index 510813846a4..567957ba2cb 100644
--- a/app/controllers/import/gitlab_projects_controller.rb
+++ b/app/controllers/import/gitlab_projects_controller.rb
@@ -4,6 +4,7 @@ class Import::GitlabProjectsController < Import::BaseController
   def new
     @namespace = Namespace.find(project_params[:namespace_id])
     return render_404 unless current_user.can?(:create_projects, @namespace)
+
     @path = project_params[:path]
   end
 
diff --git a/app/controllers/projects/deployments_controller.rb b/app/controllers/projects/deployments_controller.rb
index 47c312ffddf..1a418d0f15a 100644
--- a/app/controllers/projects/deployments_controller.rb
+++ b/app/controllers/projects/deployments_controller.rb
@@ -12,6 +12,7 @@ class Projects::DeploymentsController < Projects::ApplicationController
 
   def metrics
     return render_404 unless deployment.has_metrics?
+
     @metrics = deployment.metrics
     if @metrics&.any?
       render json: @metrics, status: :ok
diff --git a/app/controllers/projects/group_links_controller.rb b/app/controllers/projects/group_links_controller.rb
index dbc1c8bcc28..f58ee3e9109 100644
--- a/app/controllers/projects/group_links_controller.rb
+++ b/app/controllers/projects/group_links_controller.rb
@@ -12,6 +12,7 @@ class Projects::GroupLinksController < Projects::ApplicationController
 
     if group
       return render_404 unless can?(current_user, :read_group, group)
+
       Projects::GroupLinks::CreateService.new(project, current_user, group_link_create_params).execute(group)
     else
       flash[:alert] = 'Please select a group.'
diff --git a/app/controllers/projects/issues_controller.rb b/app/controllers/projects/issues_controller.rb
index dbc9106ba6d..28fee0465d5 100644
--- a/app/controllers/projects/issues_controller.rb
+++ b/app/controllers/projects/issues_controller.rb
@@ -171,6 +171,7 @@ class Projects::IssuesController < Projects::ApplicationController
 
   def issue
     return @issue if defined?(@issue)
+
     # The Sortable default scope causes performance issues when used with find_by
     @issuable = @noteable = @issue ||= @project.issues.where(iid: params[:id]).reorder(nil).take!
     @note = @project.notes.new(noteable: @issuable)
diff --git a/app/controllers/projects/labels_controller.rb b/app/controllers/projects/labels_controller.rb
index 480a2dff262..e0f4710175f 100644
--- a/app/controllers/projects/labels_controller.rb
+++ b/app/controllers/projects/labels_controller.rb
@@ -111,6 +111,7 @@ class Projects::LabelsController < Projects::ApplicationController
 
     begin
       return render_404 unless promote_service.execute(@label)
+
       respond_to do |format|
         format.html do
           redirect_to(project_labels_path(@project),
diff --git a/app/controllers/projects/lfs_storage_controller.rb b/app/controllers/projects/lfs_storage_controller.rb
index 32759672b6c..293869345bd 100644
--- a/app/controllers/projects/lfs_storage_controller.rb
+++ b/app/controllers/projects/lfs_storage_controller.rb
@@ -54,6 +54,7 @@ class Projects::LfsStorageController < Projects::GitHttpClientController
     name = request.headers['X-Gitlab-Lfs-Tmp']
     return if name.include?('/')
     return unless oid.present? && name.start_with?(oid)
+
     name
   end
 
diff --git a/app/controllers/projects/notes_controller.rb b/app/controllers/projects/notes_controller.rb
index ef7d047b1ad..627cb2bd93c 100644
--- a/app/controllers/projects/notes_controller.rb
+++ b/app/controllers/projects/notes_controller.rb
@@ -76,6 +76,7 @@ class Projects::NotesController < Projects::ApplicationController
 
   def authorize_create_note!
     return unless noteable.lockable?
+
     access_denied! unless can?(current_user, :create_note, noteable)
   end
 end
diff --git a/app/controllers/projects/wikis_controller.rb b/app/controllers/projects/wikis_controller.rb
index f7a9c98629d..acd062515f6 100644
--- a/app/controllers/projects/wikis_controller.rb
+++ b/app/controllers/projects/wikis_controller.rb
@@ -28,6 +28,7 @@ class Projects::WikisController < Projects::ApplicationController
       )
     else
       return render('empty') unless can?(current_user, :create_wiki, @project)
+
       @page = WikiPage.new(@project_wiki)
       @page.title = params[:id]
 
diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index 2a473ec0cec..a784c6f402a 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -269,6 +269,7 @@ class ProjectsController < Projects::ApplicationController
   def render_landing_page
     if can?(current_user, :download_code, @project)
       return render 'projects/no_repo' unless @project.repository_exists?
+
       render 'projects/empty' if @project.empty_repo?
     else
       if @project.wiki_enabled?
diff --git a/app/finders/personal_access_tokens_finder.rb b/app/finders/personal_access_tokens_finder.rb
index 760166b453f..d975f354a88 100644
--- a/app/finders/personal_access_tokens_finder.rb
+++ b/app/finders/personal_access_tokens_finder.rb
@@ -18,6 +18,7 @@ class PersonalAccessTokensFinder
 
   def by_user(tokens)
     return tokens unless @params[:user]
+
     tokens.where(user: @params[:user])
   end
 
diff --git a/app/helpers/diff_helper.rb b/app/helpers/diff_helper.rb
index 4e4a66e8a02..66988c869a7 100644
--- a/app/helpers/diff_helper.rb
+++ b/app/helpers/diff_helper.rb
@@ -111,6 +111,7 @@ module DiffHelper
   def diff_file_old_blob_raw_path(diff_file)
     sha = diff_file.old_content_sha
     return unless sha
+
     project_raw_path(@project, tree_join(diff_file.old_content_sha, diff_file.old_path))
   end
 
diff --git a/app/helpers/emails_helper.rb b/app/helpers/emails_helper.rb
index 5f11fe62030..878bc9b5c9c 100644
--- a/app/helpers/emails_helper.rb
+++ b/app/helpers/emails_helper.rb
@@ -24,6 +24,7 @@ module EmailsHelper
 
   def action_title(url)
     return unless url
+
     %w(merge_requests issues commit).each do |action|
       if url.split("/").include?(action)
         return "View #{action.humanize.singularize}"
diff --git a/app/helpers/markup_helper.rb b/app/helpers/markup_helper.rb
index 2c85d7d7720..6636e4d2362 100644
--- a/app/helpers/markup_helper.rb
+++ b/app/helpers/markup_helper.rb
@@ -53,6 +53,7 @@ module MarkupHelper
       # text, wrapping anything found in the requested link
       fragment.children.each do |node|
         next unless node.text?
+
         node.replace(link_to(node.text, url, html_options))
       end
     end
diff --git a/app/helpers/notifications_helper.rb b/app/helpers/notifications_helper.rb
index fde961e2da4..3e42063224e 100644
--- a/app/helpers/notifications_helper.rb
+++ b/app/helpers/notifications_helper.rb
@@ -78,6 +78,7 @@ module NotificationsHelper
   # Create hidden field to send notification setting source to controller
   def hidden_setting_source_input(notification_setting)
     return unless notification_setting.source_type
+
     hidden_field_tag "#{notification_setting.source_type.downcase}_id", notification_setting.source_id
   end
 
diff --git a/app/helpers/tree_helper.rb b/app/helpers/tree_helper.rb
index c4ea0f5ac53..9baf1403f4e 100644
--- a/app/helpers/tree_helper.rb
+++ b/app/helpers/tree_helper.rb
@@ -88,6 +88,7 @@ module TreeHelper
         part_path = part if part_path.empty?
 
         next if parts.count > max_links && !parts.last(2).include?(part)
+
         yield(part, part_path)
       end
     end
diff --git a/app/helpers/visibility_level_helper.rb b/app/helpers/visibility_level_helper.rb
index 46867d2d974..c3d5628f241 100644
--- a/app/helpers/visibility_level_helper.rb
+++ b/app/helpers/visibility_level_helper.rb
@@ -150,6 +150,7 @@ module VisibilityLevelHelper
 
   def restricted_visibility_levels(show_all = false)
     return [] if current_user.admin? && !show_all
+
     current_application_settings.restricted_visibility_levels || []
   end
 
@@ -159,6 +160,7 @@ module VisibilityLevelHelper
 
   def disallowed_visibility_level?(form_model, level)
     return false unless form_model.respond_to?(:visibility_level_allowed?)
+
     !form_model.visibility_level_allowed?(level)
   end
 
diff --git a/app/models/ci/build.rb b/app/models/ci/build.rb
index 1b2b0d17910..1d9f367183e 100644
--- a/app/models/ci/build.rb
+++ b/app/models/ci/build.rb
@@ -317,6 +317,7 @@ module Ci
 
     def execute_hooks
       return unless project
+
       build_data = Gitlab::DataBuilder::Build.build(self)
       project.execute_hooks(build_data.dup, :job_hooks)
       project.execute_services(build_data.dup, :job_hooks)
diff --git a/app/models/ci/pipeline.rb b/app/models/ci/pipeline.rb
index 19814864e50..bcc865357ff 100644
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -300,8 +300,10 @@ module Ci
 
     def latest?
       return false unless ref
+
       commit = project.commit(ref)
       return false unless commit
+
       commit.sha == sha
     end
 
diff --git a/app/models/clusters/providers/gcp.rb b/app/models/clusters/providers/gcp.rb
index ee2e43ee9dd..7fac32466ab 100644
--- a/app/models/clusters/providers/gcp.rb
+++ b/app/models/clusters/providers/gcp.rb
@@ -56,6 +56,7 @@ module Clusters
         before_transition any => [:creating] do |provider, transition|
           operation_id = transition.args.first
           raise ArgumentError.new('operation_id is required') unless operation_id.present?
+
           provider.operation_id = operation_id
         end
 
diff --git a/app/models/concerns/awardable.rb b/app/models/concerns/awardable.rb
index 9adc309a22b..d8394415362 100644
--- a/app/models/concerns/awardable.rb
+++ b/app/models/concerns/awardable.rb
@@ -98,6 +98,7 @@ module Awardable
 
   def create_award_emoji(name, current_user)
     return unless emoji_awardable?
+
     award_emoji.create(name: normalize_name(name), user: current_user)
   end
 
diff --git a/app/models/pages_domain.rb b/app/models/pages_domain.rb
index 43c77f3f2a2..8de42ff9d2e 100644
--- a/app/models/pages_domain.rb
+++ b/app/models/pages_domain.rb
@@ -65,6 +65,7 @@ class PagesDomain < ActiveRecord::Base
 
   def expired?
     return false unless x509
+
     current = Time.new
     current < x509.not_before || x509.not_after < current
   end
@@ -75,6 +76,7 @@ class PagesDomain < ActiveRecord::Base
 
   def subject
     return unless x509
+
     x509.subject.to_s
   end
 
@@ -102,6 +104,7 @@ class PagesDomain < ActiveRecord::Base
 
   def validate_pages_domain
     return unless domain
+
     if domain.downcase.ends_with?(Settings.pages.host.downcase)
       self.errors.add(:domain, "*.#{Settings.pages.host} is restricted")
     end
@@ -109,6 +112,7 @@ class PagesDomain < ActiveRecord::Base
 
   def x509
     return unless certificate
+
     @x509 ||= OpenSSL::X509::Certificate.new(certificate)
   rescue OpenSSL::X509::CertificateError
     nil
@@ -116,6 +120,7 @@ class PagesDomain < ActiveRecord::Base
 
   def pkey
     return unless key
+
     @pkey ||= OpenSSL::PKey::RSA.new(key)
   rescue OpenSSL::PKey::PKeyError, OpenSSL::Cipher::CipherError
     nil
diff --git a/app/models/project_services/hipchat_service.rb b/app/models/project_services/hipchat_service.rb
index 976d85246a8..768f0a7472e 100644
--- a/app/models/project_services/hipchat_service.rb
+++ b/app/models/project_services/hipchat_service.rb
@@ -51,8 +51,10 @@ class HipchatService < Service
 
   def execute(data)
     return unless supported_events.include?(data[:object_kind])
+
     message = create_message(data)
     return unless message.present?
+
     gate[room].send('GitLab', message, message_options(data)) # rubocop:disable GitlabSecurity/PublicSend
   end
 
diff --git a/app/models/project_services/jira_service.rb b/app/models/project_services/jira_service.rb
index b487378edd2..1c065e1ddbd 100644
--- a/app/models/project_services/jira_service.rb
+++ b/app/models/project_services/jira_service.rb
@@ -176,6 +176,7 @@ class JiraService < IssueTrackerService
 
   def test_settings
     return unless client_url.present?
+
     # Test settings by getting the project
     jira_request { client.ServerInfo.all.attrs }
   end
diff --git a/app/models/project_services/kubernetes_service.rb b/app/models/project_services/kubernetes_service.rb
index 5080acffb3c..bc62972dbb0 100644
--- a/app/models/project_services/kubernetes_service.rb
+++ b/app/models/project_services/kubernetes_service.rb
@@ -182,6 +182,7 @@ class KubernetesService < DeploymentService
     kubeclient.get_pods(namespace: actual_namespace).as_json
   rescue KubeException => err
     raise err unless err.error_code == 404
+
     []
   end
 
diff --git a/app/models/repository.rb b/app/models/repository.rb
index 3a89fa9264b..845929fb2cc 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -242,6 +242,7 @@ class Repository
       Rails.logger.error "Unable to create #{REF_KEEP_AROUND} reference for repository #{path}: #{ex}"
     rescue Rugged::OSError => ex
       raise unless ex.message =~ /Failed to create locked file/ && ex.message =~ /File exists/
+
       Rails.logger.error "Unable to create #{REF_KEEP_AROUND} reference for repository #{path}: #{ex}"
     end
   end
@@ -662,6 +663,7 @@ class Repository
   def next_branch(name, opts = {})
     branch_ids = self.branch_names.map do |n|
       next 1 if n == name
+
       result = n.match(/\A#{name}-([0-9]+)\z/)
       result[1].to_i if result
     end.compact
diff --git a/app/models/user.rb b/app/models/user.rb
index ea10e2854d6..5170d87e850 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1119,6 +1119,7 @@ class User < ActiveRecord::Base
   # override, from Devise::Validatable
   def password_required?
     return false if internal?
+
     super
   end
 
@@ -1136,6 +1137,7 @@ class User < ActiveRecord::Base
   # Added according to https://github.com/plataformatec/devise/blob/7df57d5081f9884849ca15e4fde179ef164a575f/README.md#activejob-integration
   def send_devise_notification(notification, *args)
     return true unless can?(:receive_notifications)
+
     devise_mailer.__send__(notification, self, *args).deliver_later # rubocop:disable GitlabSecurity/PublicSend
   end
 
diff --git a/app/services/ci/fetch_kubernetes_token_service.rb b/app/services/ci/fetch_kubernetes_token_service.rb
index 44da87cb00c..e73c6ad6780 100644
--- a/app/services/ci/fetch_kubernetes_token_service.rb
+++ b/app/services/ci/fetch_kubernetes_token_service.rb
@@ -34,6 +34,7 @@ module Ci
       kubeclient.get_secrets.as_json
     rescue KubeException => err
       raise err unless err.error_code == 404
+
       []
     end
 
diff --git a/app/services/labels/promote_service.rb b/app/services/labels/promote_service.rb
index 43b539ded53..997d247be46 100644
--- a/app/services/labels/promote_service.rb
+++ b/app/services/labels/promote_service.rb
@@ -19,6 +19,7 @@ module Labels
 
         # We skipped validations during creation. Let's run them now, after deleting conflicting labels
         raise ActiveRecord::RecordInvalid.new(new_label) unless new_label.valid?
+
         new_label
       end
     end
diff --git a/app/services/merge_requests/build_service.rb b/app/services/merge_requests/build_service.rb
index bc0e7ad4e39..f3b99e1ec8c 100644
--- a/app/services/merge_requests/build_service.rb
+++ b/app/services/merge_requests/build_service.rb
@@ -28,6 +28,7 @@ module MergeRequests
 
     def find_target_project
       return target_project if target_project.present? && can?(current_user, :read_project, target_project)
+
       project.default_merge_request_target
     end
 
diff --git a/app/services/projects/group_links/destroy_service.rb b/app/services/projects/group_links/destroy_service.rb
index fbf31214c28..e3a20b4c1e4 100644
--- a/app/services/projects/group_links/destroy_service.rb
+++ b/app/services/projects/group_links/destroy_service.rb
@@ -3,6 +3,7 @@ module Projects
     class DestroyService < BaseService
       def execute(group_link)
         return false unless group_link
+
         group_link.destroy
       end
     end
diff --git a/app/services/todo_service.rb b/app/services/todo_service.rb
index e694c5761da..575853fd66b 100644
--- a/app/services/todo_service.rb
+++ b/app/services/todo_service.rb
@@ -208,6 +208,7 @@ class TodoService
   def create_todos(users, attributes)
     Array(users).map do |user|
       next if pending_todos(user, attributes).exists?
+
       todo = Todo.create(attributes.merge(user_id: user.id))
       user.update_todos_count_cache
       todo
diff --git a/app/validators/certificate_key_validator.rb b/app/validators/certificate_key_validator.rb
index 098b16017d2..8c7bb750339 100644
--- a/app/validators/certificate_key_validator.rb
+++ b/app/validators/certificate_key_validator.rb
@@ -17,6 +17,7 @@ class CertificateKeyValidator < ActiveModel::EachValidator
 
   def valid_private_key_pem?(value)
     return false unless value
+
     pkey = OpenSSL::PKey::RSA.new(value)
     pkey.private?
   rescue OpenSSL::PKey::PKeyError
diff --git a/app/validators/certificate_validator.rb b/app/validators/certificate_validator.rb
index e3d18097f71..5239e70a326 100644
--- a/app/validators/certificate_validator.rb
+++ b/app/validators/certificate_validator.rb
@@ -17,6 +17,7 @@ class CertificateValidator < ActiveModel::EachValidator
 
   def valid_certificate_pem?(value)
     return false unless value
+
     OpenSSL::X509::Certificate.new(value).present?
   rescue OpenSSL::X509::CertificateError
     false
diff --git a/app/workers/irker_worker.rb b/app/workers/irker_worker.rb
index 3dd14466994..311fc187e49 100644
--- a/app/workers/irker_worker.rb
+++ b/app/workers/irker_worker.rb
@@ -104,6 +104,7 @@ class IrkerWorker
     parents = commit.parents
     # Return old value if there's no new one
     return push_data['before'] if parents.empty?
+
     # Or return the first parent-commit
     parents[0].id
   end
diff --git a/app/workers/stuck_ci_jobs_worker.rb b/app/workers/stuck_ci_jobs_worker.rb
index 269776a1f62..fdbc049c2df 100644
--- a/app/workers/stuck_ci_jobs_worker.rb
+++ b/app/workers/stuck_ci_jobs_worker.rb
@@ -39,6 +39,7 @@ class StuckCiJobsWorker
   def drop_stuck(status, timeout)
     search(status, timeout) do |build|
       return unless build.stuck?
+
       drop_build :stuck, build, status, timeout
     end
   end
diff --git a/changelogs/unreleased/18040-rubocop-line-break-after-guard-clause.yml b/changelogs/unreleased/18040-rubocop-line-break-after-guard-clause.yml
new file mode 100644
index 00000000000..e3c7ffc8046
--- /dev/null
+++ b/changelogs/unreleased/18040-rubocop-line-break-after-guard-clause.yml
@@ -0,0 +1,5 @@
+---
+title: Adds Rubocop rule for line break after guard clause
+merge_request: 15188
+author: Jacopo Beschi @jacopo-beschi
+type: added
diff --git a/config/initializers/ar5_batching.rb b/config/initializers/ar5_batching.rb
index 35e8b3808e2..6ebaf8834d2 100644
--- a/config/initializers/ar5_batching.rb
+++ b/config/initializers/ar5_batching.rb
@@ -34,6 +34,7 @@ module ActiveRecord
         yield yielded_relation
 
         break if ids.length < of
+
         batch_relation = relation.where(arel_table[primary_key].gt(primary_key_offset))
       end
     end
diff --git a/config/initializers/devise.rb b/config/initializers/devise.rb
index 958859be6cf..051ef93b205 100644
--- a/config/initializers/devise.rb
+++ b/config/initializers/devise.rb
@@ -236,6 +236,7 @@ Devise.setup do |config|
         provider['args'][:on_single_sign_out] = lambda do |request|
           ticket = request.params[:session_index]
           raise "Service Ticket not found." unless Gitlab::OAuth::Session.valid?(:cas3, ticket)
+
           Gitlab::OAuth::Session.destroy(:cas3, ticket)
           true
         end
diff --git a/config/initializers/omniauth.rb b/config/initializers/omniauth.rb
index fddb018e948..e9e1f1c4e9b 100644
--- a/config/initializers/omniauth.rb
+++ b/config/initializers/omniauth.rb
@@ -3,6 +3,7 @@ if Gitlab::LDAP::Config.enabled?
     Gitlab::LDAP::Config.available_servers.each do |server|
       # do not redeclare LDAP
       next if server['provider_name'] == 'ldap'
+
       const_set(server['provider_class'], Class.new(LDAP))
     end
   end
diff --git a/config/initializers/postgresql_cte.rb b/config/initializers/postgresql_cte.rb
index 7f0df8949db..38a9cd68d57 100644
--- a/config/initializers/postgresql_cte.rb
+++ b/config/initializers/postgresql_cte.rb
@@ -61,11 +61,13 @@ module ActiveRecord
 
     def with_values=(values)
       raise ImmutableRelation if @loaded
+
       @values[:with] = values
     end
 
     def recursive_value=(value)
       raise ImmutableRelation if @loaded
+
       @values[:recursive] = value
     end
 
diff --git a/db/migrate/20170919211300_remove_temporary_ci_builds_index.rb b/db/migrate/20170919211300_remove_temporary_ci_builds_index.rb
index b2009b282e9..8423bf13fd9 100644
--- a/db/migrate/20170919211300_remove_temporary_ci_builds_index.rb
+++ b/db/migrate/20170919211300_remove_temporary_ci_builds_index.rb
@@ -12,6 +12,7 @@ class RemoveTemporaryCiBuildsIndex < ActiveRecord::Migration
 
   def up
     return unless index_exists?(:ci_builds, :id, name: 'index_for_ci_builds_retried_migration')
+
     remove_concurrent_index(:ci_builds, :id, name: "index_for_ci_builds_retried_migration")
   end
 
diff --git a/db/post_migrate/20170406111121_clean_upload_symlinks.rb b/db/post_migrate/20170406111121_clean_upload_symlinks.rb
index f2ce25d4524..0ab3d61730d 100644
--- a/db/post_migrate/20170406111121_clean_upload_symlinks.rb
+++ b/db/post_migrate/20170406111121_clean_upload_symlinks.rb
@@ -14,6 +14,7 @@ class CleanUploadSymlinks < ActiveRecord::Migration
     DIRECTORIES_TO_MOVE.each do |dir|
       symlink_location = File.join(old_upload_dir, dir)
       next unless File.symlink?(symlink_location)
+
       say "removing symlink: #{symlink_location}"
       FileUtils.rm(symlink_location)
     end
diff --git a/db/post_migrate/20170612071012_move_personal_snippets_files.rb b/db/post_migrate/20170612071012_move_personal_snippets_files.rb
index 2b79a87ccd8..c735dc67f44 100644
--- a/db/post_migrate/20170612071012_move_personal_snippets_files.rb
+++ b/db/post_migrate/20170612071012_move_personal_snippets_files.rb
@@ -32,6 +32,7 @@ class MovePersonalSnippetsFiles < ActiveRecord::Migration
       file_name = upload['path'].split('/')[1]
 
       next unless move_file(upload['model_id'], secret, file_name)
+
       update_markdown(upload['model_id'], secret, file_name, upload['description'])
     end
   end
diff --git a/db/post_migrate/20170613111224_clean_appearance_symlinks.rb b/db/post_migrate/20170613111224_clean_appearance_symlinks.rb
index acb895e426f..17849b78ceb 100644
--- a/db/post_migrate/20170613111224_clean_appearance_symlinks.rb
+++ b/db/post_migrate/20170613111224_clean_appearance_symlinks.rb
@@ -13,6 +13,7 @@ class CleanAppearanceSymlinks < ActiveRecord::Migration
     symlink_location = File.join(old_upload_dir, dir)
 
     return unless File.symlink?(symlink_location)
+
     say "removing symlink: #{symlink_location}"
     FileUtils.rm(symlink_location)
   end
diff --git a/lib/api/commits.rb b/lib/api/commits.rb
index 2bc4039b019..38e05074353 100644
--- a/lib/api/commits.rb
+++ b/lib/api/commits.rb
@@ -180,10 +180,12 @@ module API
         if params[:path]
           commit.raw_diffs(limits: false).each do |diff|
             next unless diff.new_path == params[:path]
+
             lines = Gitlab::Diff::Parser.new.parse(diff.diff.each_line)
 
             lines.each do |line|
               next unless line.new_pos == params[:line] && line.type == params[:line_type]
+
               break opts[:line_code] = Gitlab::Git.diff_line_code(diff.new_path, line.new_pos, line.old_pos)
             end
 
diff --git a/lib/api/helpers/custom_validators.rb b/lib/api/helpers/custom_validators.rb
index 0a8f3073a50..dd4f6c41131 100644
--- a/lib/api/helpers/custom_validators.rb
+++ b/lib/api/helpers/custom_validators.rb
@@ -4,6 +4,7 @@ module API
       class Absence < Grape::Validations::Base
         def validate_param!(attr_name, params)
           return if params.respond_to?(:key?) && !params.key?(attr_name)
+
           raise Grape::Exceptions::Validation, params: [@scope.full_name(attr_name)], message: message(:absence)
         end
       end
diff --git a/lib/api/helpers/runner.rb b/lib/api/helpers/runner.rb
index 282af32ca94..2cae53dba53 100644
--- a/lib/api/helpers/runner.rb
+++ b/lib/api/helpers/runner.rb
@@ -14,6 +14,7 @@ module API
 
       def get_runner_version_from_params
         return unless params['info'].present?
+
         attributes_for_keys(%w(name version revision platform architecture), params['info'])
       end
 
diff --git a/lib/api/runners.rb b/lib/api/runners.rb
index d3559ef71be..e816fcdd928 100644
--- a/lib/api/runners.rb
+++ b/lib/api/runners.rb
@@ -165,17 +165,20 @@ module API
 
       def authenticate_show_runner!(runner)
         return if runner.is_shared || current_user.admin?
+
         forbidden!("No access granted") unless user_can_access_runner?(runner)
       end
 
       def authenticate_update_runner!(runner)
         return if current_user.admin?
+
         forbidden!("Runner is shared") if runner.is_shared?
         forbidden!("No access granted") unless user_can_access_runner?(runner)
       end
 
       def authenticate_delete_runner!(runner)
         return if current_user.admin?
+
         forbidden!("Runner is shared") if runner.is_shared?
         forbidden!("Runner associated with more than one project") if runner.projects.count > 1
         forbidden!("No access granted") unless user_can_access_runner?(runner)
@@ -185,6 +188,7 @@ module API
         forbidden!("Runner is shared") if runner.is_shared?
         forbidden!("Runner is locked") if runner.locked?
         return if current_user.admin?
+
         forbidden!("No access granted") unless user_can_access_runner?(runner)
       end
 
diff --git a/lib/api/snippets.rb b/lib/api/snippets.rb
index 00eb7c60f16..c736cc32021 100644
--- a/lib/api/snippets.rb
+++ b/lib/api/snippets.rb
@@ -95,6 +95,7 @@ module API
       put ':id' do
         snippet = snippets_for_current_user.find_by(id: params.delete(:id))
         return not_found!('Snippet') unless snippet
+
         authorize! :update_personal_snippet, snippet
 
         attrs = declared_params(include_missing: false).merge(request: request, api: true)
diff --git a/lib/api/v3/commits.rb b/lib/api/v3/commits.rb
index be360fbfc0c..0ef26aa696a 100644
--- a/lib/api/v3/commits.rb
+++ b/lib/api/v3/commits.rb
@@ -169,10 +169,12 @@ module API
           if params[:path]
             commit.raw_diffs(limits: false).each do |diff|
               next unless diff.new_path == params[:path]
+
               lines = Gitlab::Diff::Parser.new.parse(diff.diff.each_line)
 
               lines.each do |line|
                 next unless line.new_pos == params[:line] && line.type == params[:line_type]
+
                 break opts[:line_code] = Gitlab::Git.diff_line_code(diff.new_path, line.new_pos, line.old_pos)
               end
 
diff --git a/lib/api/v3/runners.rb b/lib/api/v3/runners.rb
index faa265f3314..c6d9957d452 100644
--- a/lib/api/v3/runners.rb
+++ b/lib/api/v3/runners.rb
@@ -51,6 +51,7 @@ module API
       helpers do
         def authenticate_delete_runner!(runner)
           return if current_user.admin?
+
           forbidden!("Runner is shared") if runner.is_shared?
           forbidden!("Runner associated with more than one project") if runner.projects.count > 1
           forbidden!("No access granted") unless user_can_access_runner?(runner)
diff --git a/lib/api/v3/snippets.rb b/lib/api/v3/snippets.rb
index 0762fc02d70..126ec72248e 100644
--- a/lib/api/v3/snippets.rb
+++ b/lib/api/v3/snippets.rb
@@ -91,6 +91,7 @@ module API
         put ':id' do
           snippet = snippets_for_current_user.find_by(id: params.delete(:id))
           return not_found!('Snippet') unless snippet
+
           authorize! :update_personal_snippet, snippet
 
           attrs = declared_params(include_missing: false)
@@ -113,6 +114,7 @@ module API
         delete ':id' do
           snippet = snippets_for_current_user.find_by(id: params.delete(:id))
           return not_found!('Snippet') unless snippet
+
           authorize! :destroy_personal_snippet, snippet
           snippet.destroy
           no_content!
diff --git a/lib/banzai/object_renderer.rb b/lib/banzai/object_renderer.rb
index 9bb8ed913d8..ecb3affbba5 100644
--- a/lib/banzai/object_renderer.rb
+++ b/lib/banzai/object_renderer.rb
@@ -86,6 +86,7 @@ module Banzai
 
     def save_options
       return {} unless base_context[:xhtml]
+
       { save_with: Nokogiri::XML::Node::SaveOptions::AS_XHTML }
     end
   end
diff --git a/lib/banzai/querying.rb b/lib/banzai/querying.rb
index fb2faae02bc..a19a05e8c0d 100644
--- a/lib/banzai/querying.rb
+++ b/lib/banzai/querying.rb
@@ -52,8 +52,10 @@ module Banzai
 
         children.each do |child|
           next if child.text.blank?
+
           node = nodes.shift
           break unless node == child
+
           filtered_nodes << node
         end
       end
diff --git a/lib/banzai/reference_parser/user_parser.rb b/lib/banzai/reference_parser/user_parser.rb
index 4d336068861..8932d4f2905 100644
--- a/lib/banzai/reference_parser/user_parser.rb
+++ b/lib/banzai/reference_parser/user_parser.rb
@@ -31,6 +31,7 @@ module Banzai
         nodes.each do |node|
           if node.has_attribute?(group_attr)
             next unless can_read_group_reference?(node, user, groups)
+
             visible << node
           elsif can_read_project_reference?(node)
             visible << node
diff --git a/lib/banzai/renderer.rb b/lib/banzai/renderer.rb
index 5cb9adf52b0..0050295eeda 100644
--- a/lib/banzai/renderer.rb
+++ b/lib/banzai/renderer.rb
@@ -149,6 +149,7 @@ module Banzai
 
     def self.full_cache_key(cache_key, pipeline_name)
       return unless cache_key
+
       ["banzai", *cache_key, pipeline_name || :full]
     end
 
@@ -157,6 +158,7 @@ module Banzai
     # method.
     def self.full_cache_multi_key(cache_key, pipeline_name)
       return unless cache_key
+
       Rails.cache.__send__(:expanded_key, full_cache_key(cache_key, pipeline_name)) # rubocop:disable GitlabSecurity/PublicSend
     end
   end
diff --git a/lib/declarative_policy.rb b/lib/declarative_policy.rb
index ae65653645b..b1949d693ad 100644
--- a/lib/declarative_policy.rb
+++ b/lib/declarative_policy.rb
@@ -30,6 +30,7 @@ module DeclarativePolicy
 
       policy_class = class_for_class(subject.class)
       raise "no policy for #{subject.class.name}" if policy_class.nil?
+
       policy_class
     end
 
@@ -84,6 +85,7 @@ module DeclarativePolicy
 
       while subject.respond_to?(:declarative_policy_delegate)
         raise ArgumentError, "circular delegations" if seen.include?(subject.object_id)
+
         seen << subject.object_id
         subject = subject.declarative_policy_delegate
       end
diff --git a/lib/declarative_policy/base.rb b/lib/declarative_policy/base.rb
index b028169f500..47542194497 100644
--- a/lib/declarative_policy/base.rb
+++ b/lib/declarative_policy/base.rb
@@ -276,6 +276,7 @@ module DeclarativePolicy
     # boolean `false`
     def cache(key, &b)
       return @cache[key] if cached?(key)
+
       @cache[key] = yield
     end
 
@@ -291,6 +292,7 @@ module DeclarativePolicy
       @_conditions[name] ||=
         begin
           raise "invalid condition #{name}" unless self.class.conditions.key?(name)
+
           ManifestCondition.new(self.class.conditions[name], self)
         end
     end
diff --git a/lib/declarative_policy/cache.rb b/lib/declarative_policy/cache.rb
index 0804edba016..780d8f707bd 100644
--- a/lib/declarative_policy/cache.rb
+++ b/lib/declarative_policy/cache.rb
@@ -3,6 +3,7 @@ module DeclarativePolicy
     class << self
       def user_key(user)
         return '<anonymous>' if user.nil?
+
         id_for(user)
       end
 
@@ -15,6 +16,7 @@ module DeclarativePolicy
       def subject_key(subject)
         return '<nil>' if subject.nil?
         return subject.inspect if subject.is_a?(Symbol)
+
         "#{subject.class.name}:#{id_for(subject)}"
       end
 
diff --git a/lib/declarative_policy/rule.rb b/lib/declarative_policy/rule.rb
index 7cfa82a9a9f..e309244a3b3 100644
--- a/lib/declarative_policy/rule.rb
+++ b/lib/declarative_policy/rule.rb
@@ -83,6 +83,7 @@ module DeclarativePolicy
       def cached_pass?(context)
         condition = context.condition(@name)
         return nil unless condition.cached?
+
         condition.pass?
       end
 
@@ -109,6 +110,7 @@ module DeclarativePolicy
       def delegated_context(context)
         policy = context.delegated_policies[@delegate_name]
         raise MissingDelegate if policy.nil?
+
         policy
       end
 
@@ -121,6 +123,7 @@ module DeclarativePolicy
       def cached_pass?(context)
         condition = delegated_context(context).condition(@name)
         return nil unless condition.cached?
+
         condition.pass?
       rescue MissingDelegate
         false
@@ -157,6 +160,7 @@ module DeclarativePolicy
       def cached_pass?(context)
         runner = context.runner(@ability)
         return nil unless runner.cached?
+
         runner.pass?
       end
 
@@ -258,6 +262,7 @@ module DeclarativePolicy
 
       def score(context)
         return 0 unless cached_pass?(context).nil?
+
         @rules.map { |r| r.score(context) }.inject(0, :+)
       end
 
diff --git a/lib/declarative_policy/runner.rb b/lib/declarative_policy/runner.rb
index 45ff2ef9ced..77c91817382 100644
--- a/lib/declarative_policy/runner.rb
+++ b/lib/declarative_policy/runner.rb
@@ -43,6 +43,7 @@ module DeclarativePolicy
     # used by Rule::Ability. See #steps_by_score
     def score
       return 0 if cached?
+
       steps.map(&:score).inject(0, :+)
     end
 
diff --git a/lib/file_size_validator.rb b/lib/file_size_validator.rb
index de391de9059..69d981e8be9 100644
--- a/lib/file_size_validator.rb
+++ b/lib/file_size_validator.rb
@@ -8,6 +8,7 @@ class FileSizeValidator < ActiveModel::EachValidator
   def initialize(options)
     if range = (options.delete(:in) || options.delete(:within))
       raise ArgumentError, ":in and :within must be a Range" unless range.is_a?(Range)
+
       options[:minimum], options[:maximum] = range.begin, range.end
       options[:maximum] -= 1 if range.exclude_end?
     end
diff --git a/lib/gitlab/changes_list.rb b/lib/gitlab/changes_list.rb
index 5b32fca00a4..9c9e6668e6f 100644
--- a/lib/gitlab/changes_list.rb
+++ b/lib/gitlab/changes_list.rb
@@ -16,6 +16,7 @@ module Gitlab
       @changes ||= begin
         @raw_changes.map do |change|
           next if change.blank?
+
           oldrev, newrev, ref = change.strip.split(' ')
           { oldrev: oldrev, newrev: newrev, ref: ref }
         end.compact
diff --git a/lib/gitlab/ci/build/artifacts/metadata.rb b/lib/gitlab/ci/build/artifacts/metadata.rb
index a788fb3fcbc..0bbd60d8ffe 100644
--- a/lib/gitlab/ci/build/artifacts/metadata.rb
+++ b/lib/gitlab/ci/build/artifacts/metadata.rb
@@ -98,6 +98,7 @@ module Gitlab
           def read_string(gz)
             string_size = read_uint32(gz)
             return nil unless string_size
+
             gz.read(string_size)
           end
 
diff --git a/lib/gitlab/ci/build/artifacts/metadata/entry.rb b/lib/gitlab/ci/build/artifacts/metadata/entry.rb
index 22941d48edf..5b2f09e03ea 100644
--- a/lib/gitlab/ci/build/artifacts/metadata/entry.rb
+++ b/lib/gitlab/ci/build/artifacts/metadata/entry.rb
@@ -43,6 +43,7 @@ module Gitlab
 
             def parent
               return nil unless has_parent?
+
               self.class.new(@path.to_s.chomp(basename), @entries)
             end
 
@@ -64,6 +65,7 @@ module Gitlab
 
             def directories(opts = {})
               return [] unless directory?
+
               dirs = children.select(&:directory?)
               return dirs unless has_parent? && opts[:parent]
 
@@ -74,6 +76,7 @@ module Gitlab
 
             def files
               return [] unless directory?
+
               children.select(&:file?)
             end
 
diff --git a/lib/gitlab/ci/build/image.rb b/lib/gitlab/ci/build/image.rb
index b88b2e36d53..c811f88f483 100644
--- a/lib/gitlab/ci/build/image.rb
+++ b/lib/gitlab/ci/build/image.rb
@@ -8,6 +8,7 @@ module Gitlab
           def from_image(job)
             image = Gitlab::Ci::Build::Image.new(job.options[:image])
             return unless image.valid?
+
             image
           end
 
diff --git a/lib/gitlab/ci/config/entry/image.rb b/lib/gitlab/ci/config/entry/image.rb
index 6555c589173..2844be80a84 100644
--- a/lib/gitlab/ci/config/entry/image.rb
+++ b/lib/gitlab/ci/config/entry/image.rb
@@ -37,6 +37,7 @@ module Gitlab
           def value
             return { name: @config } if string?
             return @config if hash?
+
             {}
           end
         end
diff --git a/lib/gitlab/ci/config/entry/validators.rb b/lib/gitlab/ci/config/entry/validators.rb
index 0159179f0a9..eb606b57667 100644
--- a/lib/gitlab/ci/config/entry/validators.rb
+++ b/lib/gitlab/ci/config/entry/validators.rb
@@ -111,6 +111,7 @@ module Gitlab
             def validate_string_or_regexp(value)
               return false unless value.is_a?(String)
               return validate_regexp(value) if look_like_regexp?(value)
+
               true
             end
           end
diff --git a/lib/gitlab/daemon.rb b/lib/gitlab/daemon.rb
index f07fd1dfdda..633de9f9776 100644
--- a/lib/gitlab/daemon.rb
+++ b/lib/gitlab/daemon.rb
@@ -2,6 +2,7 @@ module Gitlab
   class Daemon
     def self.initialize_instance(*args)
       raise "#{name} singleton instance already initialized" if @instance
+
       @instance = new(*args)
       Kernel.at_exit(&@instance.method(:stop))
       @instance
diff --git a/lib/gitlab/diff/inline_diff.rb b/lib/gitlab/diff/inline_diff.rb
index 55708d42161..2d7b57120a6 100644
--- a/lib/gitlab/diff/inline_diff.rb
+++ b/lib/gitlab/diff/inline_diff.rb
@@ -102,6 +102,7 @@ module Gitlab
           new_char = b[pos]
 
           break if old_char != new_char
+
           length += 1
         end
 
diff --git a/lib/gitlab/diff/parser.rb b/lib/gitlab/diff/parser.rb
index 7dc9cc7c281..8302f30a0a2 100644
--- a/lib/gitlab/diff/parser.rb
+++ b/lib/gitlab/diff/parser.rb
@@ -30,6 +30,7 @@ module Gitlab
               line_new = line.match(/\+[0-9]*/)[0].to_i.abs rescue 0
 
               next if line_old <= 1 && line_new <= 1 # top of file
+
               yielder << Gitlab::Diff::Line.new(full_line, type, line_obj_index, line_old, line_new)
               line_obj_index += 1
               next
diff --git a/lib/gitlab/diff/position.rb b/lib/gitlab/diff/position.rb
index ccfb908bcca..690b27cde81 100644
--- a/lib/gitlab/diff/position.rb
+++ b/lib/gitlab/diff/position.rb
@@ -125,6 +125,7 @@ module Gitlab
       def find_diff_file(repository)
         return unless diff_refs.complete?
         return unless comparison = diff_refs.compare_in(repository.project)
+
         comparison.diffs(paths: paths, expanded: true).diff_files.first
       end
 
diff --git a/lib/gitlab/email/handler/unsubscribe_handler.rb b/lib/gitlab/email/handler/unsubscribe_handler.rb
index 5894384da5d..ea80e21532e 100644
--- a/lib/gitlab/email/handler/unsubscribe_handler.rb
+++ b/lib/gitlab/email/handler/unsubscribe_handler.rb
@@ -16,6 +16,7 @@ module Gitlab
 
           noteable = sent_notification.noteable
           raise NoteableNotFoundError unless noteable
+
           noteable.unsubscribe(sent_notification.recipient)
         end
 
diff --git a/lib/gitlab/fogbugz_import/client.rb b/lib/gitlab/fogbugz_import/client.rb
index 2152182b37f..acb000e3e23 100644
--- a/lib/gitlab/fogbugz_import/client.rb
+++ b/lib/gitlab/fogbugz_import/client.rb
@@ -45,6 +45,7 @@ module Gitlab
         project_name = repo(project_id).name
         res = @api.command(:search, q: "project:'#{project_name}'", cols: 'ixPersonAssignedTo,ixPersonOpenedBy,ixPersonClosedBy,sStatus,sPriority,sCategory,fOpen,sTitle,sLatestTextSummary,dtOpened,dtClosed,dtResolved,dtLastUpdated,events')
         return [] unless res['cases']['count'].to_i > 0
+
         res['cases']['case']
       end
 
diff --git a/lib/gitlab/fogbugz_import/importer.rb b/lib/gitlab/fogbugz_import/importer.rb
index 3dcee681c72..5e426b13ade 100644
--- a/lib/gitlab/fogbugz_import/importer.rb
+++ b/lib/gitlab/fogbugz_import/importer.rb
@@ -18,6 +18,7 @@ module Gitlab
 
       def execute
         return true unless repo.valid?
+
         client = Gitlab::FogbugzImport::Client.new(token: fb_session[:token], uri: fb_session[:uri])
 
         @cases = client.cases(@repo.id.to_i)
@@ -206,6 +207,7 @@ module Gitlab
 
       def format_content(raw_content)
         return raw_content if raw_content.nil?
+
         linkify_issues(escape_for_markdown(raw_content))
       end
 
diff --git a/lib/gitlab/git/blob.rb b/lib/gitlab/git/blob.rb
index cc6c7609ec7..bd5039fb87e 100644
--- a/lib/gitlab/git/blob.rb
+++ b/lib/gitlab/git/blob.rb
@@ -102,6 +102,7 @@ module Gitlab
 
           if path_arr.size > 1
             return nil unless entry[:type] == :tree
+
             path_arr.shift
             find_entry_by_path(repository, entry[:oid], path_arr.join('/'))
           else
diff --git a/lib/gitlab/git/repository.rb b/lib/gitlab/git/repository.rb
index cfb88a0c12b..aad8464dff4 100644
--- a/lib/gitlab/git/repository.rb
+++ b/lib/gitlab/git/repository.rb
@@ -1376,6 +1376,7 @@ module Gitlab
             end
 
             return nil unless tmp_entry.type == :tree
+
             tmp_entry = tmp_entry[dir]
           end
         end
@@ -1496,6 +1497,7 @@ module Gitlab
       # Ref names must start with `refs/`.
       def rugged_ref_exists?(ref_name)
         raise ArgumentError, 'invalid refname' unless ref_name.start_with?('refs/')
+
         rugged.references.exist?(ref_name)
       rescue Rugged::ReferenceError
         false
@@ -1562,6 +1564,7 @@ module Gitlab
         Gitlab::Git::Branch.new(self, rugged_ref.name, rugged_ref.target, target_commit)
       rescue Rugged::ReferenceError => e
         raise InvalidRef.new("Branch #{ref} already exists") if e.to_s =~ /'refs\/heads\/#{ref}'/
+
         raise InvalidRef.new("Invalid reference #{start_point}")
       end
 
diff --git a/lib/gitlab/gitaly_client/ref_service.rb b/lib/gitlab/gitaly_client/ref_service.rb
index b0c73395cb1..e8a2215959d 100644
--- a/lib/gitlab/gitaly_client/ref_service.rb
+++ b/lib/gitlab/gitaly_client/ref_service.rb
@@ -137,6 +137,7 @@ module Gitlab
 
         enum_value = Gitaly::FindLocalBranchesRequest::SortBy.resolve(sort_by.upcase.to_sym)
         raise ArgumentError, "Invalid sort_by key `#{sort_by}`" unless enum_value
+
         enum_value
       end
 
diff --git a/lib/gitlab/gitaly_client/wiki_service.rb b/lib/gitlab/gitaly_client/wiki_service.rb
index 8f05f40365e..c8f065f5881 100644
--- a/lib/gitlab/gitaly_client/wiki_service.rb
+++ b/lib/gitlab/gitaly_client/wiki_service.rb
@@ -94,6 +94,7 @@ module Gitlab
           page, version = wiki_page_from_iterator(response) { |message| message.end_of_page }
 
           break unless page && version
+
           pages << [page, version]
         end
 
diff --git a/lib/gitlab/gitlab_import/client.rb b/lib/gitlab/gitlab_import/client.rb
index f1007daab5d..075b3982608 100644
--- a/lib/gitlab/gitlab_import/client.rb
+++ b/lib/gitlab/gitlab_import/client.rb
@@ -65,6 +65,7 @@ module Gitlab
               y << item
             end
             break if items.empty? || items.size < per_page
+
             page += 1
           end
         end
diff --git a/lib/gitlab/kubernetes/namespace.rb b/lib/gitlab/kubernetes/namespace.rb
index c8479fbc0e8..fbbddb7bffa 100644
--- a/lib/gitlab/kubernetes/namespace.rb
+++ b/lib/gitlab/kubernetes/namespace.rb
@@ -12,6 +12,7 @@ module Gitlab
         @client.get_namespace(name)
       rescue ::KubeException => ke
         raise ke unless ke.error_code == 404
+
         false
       end
 
diff --git a/lib/gitlab/ldap/authentication.rb b/lib/gitlab/ldap/authentication.rb
index ed1de73f8c6..7274d1c3b43 100644
--- a/lib/gitlab/ldap/authentication.rb
+++ b/lib/gitlab/ldap/authentication.rb
@@ -62,6 +62,7 @@ module Gitlab
 
       def user
         return nil unless ldap_user
+
         Gitlab::LDAP::User.find_by_uid_and_provider(ldap_user.dn, provider)
       end
     end
diff --git a/lib/gitlab/legacy_github_import/importer.rb b/lib/gitlab/legacy_github_import/importer.rb
index 12c968805f5..4d096e5a741 100644
--- a/lib/gitlab/legacy_github_import/importer.rb
+++ b/lib/gitlab/legacy_github_import/importer.rb
@@ -15,6 +15,7 @@ module Gitlab
 
       def client
         return @client if defined?(@client)
+
         unless credentials
           raise Projects::ImportService::Error,
                 "Unable to find project import data credentials for project ID: #{@project.id}"
diff --git a/lib/gitlab/metrics/samplers/ruby_sampler.rb b/lib/gitlab/metrics/samplers/ruby_sampler.rb
index 8b5a60e6b8b..436a9e9550d 100644
--- a/lib/gitlab/metrics/samplers/ruby_sampler.rb
+++ b/lib/gitlab/metrics/samplers/ruby_sampler.rb
@@ -96,6 +96,7 @@ module Gitlab
 
         def worker_label
           return {} unless defined?(Unicorn::Worker)
+
           worker_no = ::Prometheus::Client::Support::Unicorn.worker_id
 
           if worker_no
diff --git a/lib/gitlab/metrics/subscribers/active_record.rb b/lib/gitlab/metrics/subscribers/active_record.rb
index 064299f40c8..ead1acb8d44 100644
--- a/lib/gitlab/metrics/subscribers/active_record.rb
+++ b/lib/gitlab/metrics/subscribers/active_record.rb
@@ -7,6 +7,7 @@ module Gitlab
 
         def sql(event)
           return unless current_transaction
+
           metric_sql_duration_seconds.observe(current_transaction.labels, event.duration / 1000.0)
 
           current_transaction.increment(:sql_duration, event.duration, false)
diff --git a/lib/gitlab/middleware/go.rb b/lib/gitlab/middleware/go.rb
index cfc6b2a2029..d87e3a17914 100644
--- a/lib/gitlab/middleware/go.rb
+++ b/lib/gitlab/middleware/go.rb
@@ -66,6 +66,7 @@ module Gitlab
 
         project_path_match = "#{path_info}/".match(PROJECT_PATH_REGEX)
         return unless project_path_match
+
         path = project_path_match[1]
 
         # Go subpackages may be in the form of `namespace/project/path1/path2/../pathN`.
diff --git a/lib/gitlab/optimistic_locking.rb b/lib/gitlab/optimistic_locking.rb
index 962ff4d3985..1d9a5d1a20a 100644
--- a/lib/gitlab/optimistic_locking.rb
+++ b/lib/gitlab/optimistic_locking.rb
@@ -11,6 +11,7 @@ module Gitlab
         rescue ActiveRecord::StaleObjectError
           retries -= 1
           raise unless retries >= 0
+
           subject.reload
         end
       end
diff --git a/lib/gitlab/saml/user.rb b/lib/gitlab/saml/user.rb
index e0a9d1dee77..d8faf7aad8c 100644
--- a/lib/gitlab/saml/user.rb
+++ b/lib/gitlab/saml/user.rb
@@ -28,6 +28,7 @@ module Gitlab
 
       def changed?
         return true unless gl_user
+
         gl_user.changed? || gl_user.identities.any?(&:changed?)
       end
 
diff --git a/lib/gitlab/shell.rb b/lib/gitlab/shell.rb
index a37112ae5c4..dc0184e4ad9 100644
--- a/lib/gitlab/shell.rb
+++ b/lib/gitlab/shell.rb
@@ -368,6 +368,7 @@ module Gitlab
       output, status = gitlab_shell_fast_execute_helper(cmd, vars)
 
       raise Error, output unless status.zero?
+
       true
     end
 
diff --git a/lib/gitlab/string_range_marker.rb b/lib/gitlab/string_range_marker.rb
index 11aeec1ebfa..f9faa134206 100644
--- a/lib/gitlab/string_range_marker.rb
+++ b/lib/gitlab/string_range_marker.rb
@@ -90,6 +90,7 @@ module Gitlab
     # Takes an array of integers, and returns an array of ranges covering the same integers
     def collapse_ranges(positions)
       return [] if positions.empty?
+
       ranges = []
 
       start = prev = positions[0]
diff --git a/lib/gitlab/template/finders/repo_template_finder.rb b/lib/gitlab/template/finders/repo_template_finder.rb
index cb7957e2af9..33f07fa0120 100644
--- a/lib/gitlab/template/finders/repo_template_finder.rb
+++ b/lib/gitlab/template/finders/repo_template_finder.rb
@@ -18,6 +18,7 @@ module Gitlab
         def read(path)
           blob = @repository.blob_at(@commit.id, path) if @commit
           raise FileNotFoundError if blob.nil?
+
           blob.data
         end
 
diff --git a/lib/gitlab/url_sanitizer.rb b/lib/gitlab/url_sanitizer.rb
index 1caa791c1be..59331c827af 100644
--- a/lib/gitlab/url_sanitizer.rb
+++ b/lib/gitlab/url_sanitizer.rb
@@ -70,6 +70,7 @@ module Gitlab
 
     def generate_full_url
       return @url unless valid_credentials?
+
       @full_url = @url.dup
 
       @full_url.password = credentials[:password] if credentials[:password].present?
diff --git a/lib/gitlab/visibility_level.rb b/lib/gitlab/visibility_level.rb
index c60bd91ea6e..11472ce6cce 100644
--- a/lib/gitlab/visibility_level.rb
+++ b/lib/gitlab/visibility_level.rb
@@ -99,6 +99,7 @@ module Gitlab
 
       def level_value(level)
         return level.to_i if level.to_i.to_s == level.to_s && string_options.key(level.to_i)
+
         string_options[level] || PRIVATE
       end
 
diff --git a/lib/gitlab/workhorse.rb b/lib/gitlab/workhorse.rb
index e1219df1b25..864a9e04888 100644
--- a/lib/gitlab/workhorse.rb
+++ b/lib/gitlab/workhorse.rb
@@ -174,6 +174,7 @@ module Gitlab
         @secret ||= begin
           bytes = Base64.strict_decode64(File.read(secret_path).chomp)
           raise "#{secret_path} does not contain #{SECRET_LENGTH} bytes" if bytes.length != SECRET_LENGTH
+
           bytes
         end
       end
diff --git a/lib/haml_lint/inline_javascript.rb b/lib/haml_lint/inline_javascript.rb
index 05668c69006..f5485eb89fa 100644
--- a/lib/haml_lint/inline_javascript.rb
+++ b/lib/haml_lint/inline_javascript.rb
@@ -9,6 +9,7 @@ unless Rails.env.production?
 
       def visit_filter(node)
         return unless node.filter_type == 'javascript'
+
         record_lint(node, 'Inline JavaScript is discouraged (https://docs.gitlab.com/ee/development/gotchas.html#do-not-use-inline-javascript-in-views)')
       end
     end
diff --git a/lib/system_check/simple_executor.rb b/lib/system_check/simple_executor.rb
index 00221f77cf4..8b145fb4511 100644
--- a/lib/system_check/simple_executor.rb
+++ b/lib/system_check/simple_executor.rb
@@ -24,6 +24,7 @@ module SystemCheck
     # @param [BaseCheck] check class
     def <<(check)
       raise ArgumentError unless check.is_a?(Class) && check < BaseCheck
+
       @checks << check
     end
 
diff --git a/lib/tasks/gitlab/cleanup.rake b/lib/tasks/gitlab/cleanup.rake
index 8ae1b6a626a..91c74bfb6b4 100644
--- a/lib/tasks/gitlab/cleanup.rake
+++ b/lib/tasks/gitlab/cleanup.rake
@@ -60,6 +60,7 @@ namespace :gitlab do
               .chomp('.git')
               .chomp('.wiki')
             next if Project.find_by_full_path(repo_with_namespace)
+
             new_path = path + move_suffix
             puts path.inspect + ' -> ' + new_path.inspect
             File.rename(path, new_path)
@@ -75,6 +76,7 @@ namespace :gitlab do
 
       User.find_each do |user|
         next unless user.ldap_user?
+
         print "#{user.name} (#{user.ldap_identity.extern_uid}) ..."
         if Gitlab::LDAP::Access.allowed?(user)
           puts " [OK]".color(:green)
diff --git a/qa/qa/page/main/entry.rb b/qa/qa/page/main/entry.rb
index ac939732b1d..ae6484b4bfe 100644
--- a/qa/qa/page/main/entry.rb
+++ b/qa/qa/page/main/entry.rb
@@ -16,6 +16,7 @@ module QA
 
           while Time.now - start < 240
             break if page.has_css?('.application', wait: 10)
+
             refresh
           end
         end
diff --git a/rubocop/cop/line_break_after_guard_clauses.rb b/rubocop/cop/line_break_after_guard_clauses.rb
new file mode 100644
index 00000000000..67477f064ab
--- /dev/null
+++ b/rubocop/cop/line_break_after_guard_clauses.rb
@@ -0,0 +1,100 @@
+# frozen_string_literal: true
+
+module RuboCop
+  module Cop
+    # Ensures a line break after guard clauses.
+    #
+    # @example
+    #   # bad
+    #   return unless condition
+    #   do_stuff
+    #
+    #   # good
+    #   return unless condition
+    #
+    #   do_stuff
+    #
+    #   # bad
+    #   raise if condition
+    #   do_stuff
+    #
+    #   # good
+    #   raise if condition
+    #
+    #   do_stuff
+    #
+    #   Multiple guard clauses are allowed without
+    #   line break.
+    #
+    #   # good
+    #   return unless condition_a
+    #   return unless condition_b
+    #
+    #   do_stuff
+    #
+    #   Guard clauses in case statement are allowed without
+    #   line break.
+    #
+    #   # good
+    #   case model
+    #     when condition_a
+    #       return true unless condition_b
+    #     when
+    #       ...
+    #   end
+    #
+    #   Guard clauses before end are allowed without
+    #   line break.
+    #
+    #   # good
+    #   if condition_a
+    #     do_something
+    #   else
+    #     do_something_else
+    #     return unless condition
+    #   end
+    #
+    #   do_something_more
+    class LineBreakAfterGuardClauses < RuboCop::Cop::Cop
+      MSG = 'Add a line break after guard clauses'
+
+      def_node_matcher :guard_clause_node?, <<-PATTERN
+        [{(send nil? {:raise :fail :throw} ...) return break next} single_line?]
+      PATTERN
+
+      def on_if(node)
+        return unless node.single_line?
+        return unless guard_clause?(node)
+        return if next_line(node).blank? || clause_last_line?(next_line(node)) || guard_clause?(next_sibling(node))
+
+        add_offense(node, :expression, MSG)
+      end
+
+      def autocorrect(node)
+        lambda do |corrector|
+          corrector.insert_after(node.loc.expression, "\n")
+        end
+      end
+
+      private
+
+      def guard_clause?(node)
+        return false unless node.if_type?
+
+        guard_clause_node?(node.if_branch)
+      end
+
+      def next_sibling(node)
+        node.parent.children[node.sibling_index + 1]
+      end
+
+      def next_line(node)
+        processed_source[node.loc.line]
+      end
+
+      def clause_last_line?(line)
+        line =~ /^\s*(?:end|elsif|else|when|rescue|ensure)/
+      end
+    end
+  end
+end
diff --git a/rubocop/rubocop.rb b/rubocop/rubocop.rb
index 4ebbe010e90..0992168e1ff 100644
--- a/rubocop/rubocop.rb
+++ b/rubocop/rubocop.rb
@@ -3,6 +3,7 @@ require_relative 'cop/active_record_serialize'
 require_relative 'cop/custom_error_class'
 require_relative 'cop/gem_fetcher'
 require_relative 'cop/in_batches'
+require_relative 'cop/line_break_after_guard_clauses'
 require_relative 'cop/polymorphic_associations'
 require_relative 'cop/project_path_helper'
 require_relative 'cop/redirect_with_status'
diff --git a/spec/factories/notes.rb b/spec/factories/notes.rb
index f0d05504b7e..ab4ae123429 100644
--- a/spec/factories/notes.rb
+++ b/spec/factories/notes.rb
@@ -130,6 +130,7 @@ FactoryGirl.define do
     before(:create) do |note, evaluator|
       discussion = evaluator.in_reply_to
       next unless discussion
+
       discussion = discussion.to_discussion if discussion.is_a?(Note)
       next unless discussion
 
diff --git a/spec/lib/gitlab/git/diff_collection_spec.rb b/spec/lib/gitlab/git/diff_collection_spec.rb
index ee657101f4c..65edc750f39 100644
--- a/spec/lib/gitlab/git/diff_collection_spec.rb
+++ b/spec/lib/gitlab/git/diff_collection_spec.rb
@@ -487,6 +487,7 @@ describe Gitlab::Git::DiffCollection, seed_helper: true do
 
       loop do
         break if @count.zero?
+
         # It is critical to decrement before yielding. We may never reach the lines after 'yield'.
         @count -= 1
         yield @value
diff --git a/spec/models/project_services/flowdock_service_spec.rb b/spec/models/project_services/flowdock_service_spec.rb
index 5e8e880985e..fabcb142858 100644
--- a/spec/models/project_services/flowdock_service_spec.rb
+++ b/spec/models/project_services/flowdock_service_spec.rb
@@ -46,6 +46,7 @@ describe FlowdockService do
       @sample_data[:commits].each do |commit|
         # One request to Flowdock per new commit
         next if commit[:id] == @sample_data[:before]
+
         expect(WebMock).to have_requested(:post, @api_url).with(
           body: /#{commit[:id]}.*#{project.path}/
         ).once
diff --git a/spec/requests/api/projects_spec.rb b/spec/requests/api/projects_spec.rb
index 50f6c8b7d64..a41345da05b 100644
--- a/spec/requests/api/projects_spec.rb
+++ b/spec/requests/api/projects_spec.rb
@@ -437,6 +437,7 @@ describe API::Projects do
 
       project.each_pair do |k, v|
         next if %i[has_external_issue_tracker issues_enabled merge_requests_enabled wiki_enabled].include?(k)
+
         expect(json_response[k.to_s]).to eq(v)
       end
 
@@ -643,6 +644,7 @@ describe API::Projects do
       expect(response).to have_gitlab_http_status(201)
       project.each_pair do |k, v|
         next if %i[has_external_issue_tracker path].include?(k)
+
         expect(json_response[k.to_s]).to eq(v)
       end
     end
diff --git a/spec/requests/api/v3/projects_spec.rb b/spec/requests/api/v3/projects_spec.rb
index f62ad747c73..27288b98d1c 100644
--- a/spec/requests/api/v3/projects_spec.rb
+++ b/spec/requests/api/v3/projects_spec.rb
@@ -404,6 +404,7 @@ describe API::V3::Projects do
 
       project.each_pair do |k, v|
         next if %i[has_external_issue_tracker issues_enabled merge_requests_enabled wiki_enabled].include?(k)
+
         expect(json_response[k.to_s]).to eq(v)
       end
 
@@ -547,6 +548,7 @@ describe API::V3::Projects do
       expect(response).to have_gitlab_http_status(201)
       project.each_pair do |k, v|
         next if %i[has_external_issue_tracker path].include?(k)
+
         expect(json_response[k.to_s]).to eq(v)
       end
     end
diff --git a/spec/rubocop/cop/line_break_after_guard_clauses_spec.rb b/spec/rubocop/cop/line_break_after_guard_clauses_spec.rb
new file mode 100644
index 00000000000..8899dc85384
--- /dev/null
+++ b/spec/rubocop/cop/line_break_after_guard_clauses_spec.rb
@@ -0,0 +1,160 @@
+require 'spec_helper'
+require 'rubocop'
+require 'rubocop/rspec/support'
+require_relative '../../../rubocop/cop/line_break_after_guard_clauses'
+
+describe RuboCop::Cop::LineBreakAfterGuardClauses do
+  include CopHelper
+
+  subject(:cop) { described_class.new }
+
+  shared_examples 'examples with guard clause' do |title|
+    %w[if unless].each do |conditional|
+      it "flags violation for #{title} #{conditional} without line breaks" do
+        source = <<~RUBY
+          #{title} #{conditional} condition
+          do_stuff
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses.size).to eq(1)
+        offense = cop.offenses.first
+
+        expect(offense.line).to eq(1)
+        expect(cop.highlights).to eq(["#{title} #{conditional} condition"])
+        expect(offense.message).to eq('Add a line break after guard clauses')
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} with line break" do
+        source = <<~RUBY
+          #{title} #{conditional} condition
+
+          do_stuff
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} on multiple lines without line break" do
+        source = <<~RUBY
+          #{conditional} condition
+            #{title}
+          end
+          do_stuff
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} without line breaks when followed by end keyword" do
+        source = <<~RUBY
+          def test
+            #{title} #{conditional} condition
+          end
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} without line breaks when followed by elsif keyword" do
+        source = <<~RUBY
+          if model
+            #{title} #{conditional} condition
+          elsif
+            do_something
+          end
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} without line breaks when followed by else keyword" do
+        source = <<~RUBY
+          if model
+            #{title} #{conditional} condition
+          else
+            do_something
+          end
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} without line breaks when followed by when keyword" do
+        source = <<~RUBY
+          case model
+            when condition_a
+              #{title} #{conditional} condition
+            when condition_b
+              do_something
+            end
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} without line breaks when followed by rescue keyword" do
+        source = <<~RUBY
+          begin
+            #{title} #{conditional} condition
+          rescue StandardError
+            do_something
+          end
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} without line breaks when followed by ensure keyword" do
+        source = <<~RUBY
+          def foo
+            #{title} #{conditional} condition
+          ensure
+            do_something
+          end
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "doesn't flag violation for #{title} #{conditional} without line breaks when followed by another guard clause" do
+        source = <<~RUBY
+          #{title} #{conditional} condition
+          #{title} #{conditional} condition
+
+          do_stuff
+        RUBY
+        inspect_source(cop, source)
+
+        expect(cop.offenses).to be_empty
+      end
+
+      it "autocorrects #{title} #{conditional} guard clauses without line break" do
+        source = <<~RUBY
+          #{title} #{conditional} condition
+          do_stuff
+        RUBY
+        autocorrected = autocorrect_source(cop, source)
+
+        expected_source = <<~RUBY
+          #{title} #{conditional} condition
+
+          do_stuff
+        RUBY
+        expect(autocorrected).to eql(expected_source)
+      end
+    end
+  end
+
+  %w[return fail raise next break throw].each do |example|
+    it_behaves_like 'examples with guard clause', example
+  end
+end
diff --git a/spec/services/notification_service_spec.rb b/spec/services/notification_service_spec.rb
index b13e12e7c94..db5de572b6d 100644
--- a/spec/services/notification_service_spec.rb
+++ b/spec/services/notification_service_spec.rb
@@ -280,6 +280,7 @@ describe NotificationService, :mailer do
             next if member.id == @u_disabled.id
             # Author should not be notified
             next if member.id == note.author.id
+
             should_email(member)
           end
 
@@ -327,6 +328,7 @@ describe NotificationService, :mailer do
             next if member.id == @u_disabled.id
             # Author should not be notified
             next if member.id == note.author.id
+
             should_email(member)
           end
 
diff --git a/spec/support/fixture_helpers.rb b/spec/support/fixture_helpers.rb
index 5515c355cea..128aaaf25fe 100644
--- a/spec/support/fixture_helpers.rb
+++ b/spec/support/fixture_helpers.rb
@@ -1,6 +1,7 @@
 module FixtureHelpers
   def fixture_file(filename)
     return '' if filename.blank?
+
     File.read(expand_fixture_path(filename))
   end
 
diff --git a/spec/support/generate-seed-repo-rb b/spec/support/generate-seed-repo-rb
index ef3c8e7087f..4ee33f9725b 100755
--- a/spec/support/generate-seed-repo-rb
+++ b/spec/support/generate-seed-repo-rb
@@ -33,6 +33,7 @@ end
 def capture!(cmd, dir)
   output = IO.popen(cmd, 'r', chdir: dir) { |io| io.read }
   raise "command failed with #{$?}: #{cmd.join(' ')}" unless $?.success?
+
   output.chomp
 end
 
diff --git a/spec/support/gitaly.rb b/spec/support/gitaly.rb
index 1512b3e0620..c7e8a39a617 100644
--- a/spec/support/gitaly.rb
+++ b/spec/support/gitaly.rb
@@ -4,6 +4,7 @@ RSpec.configure do |config|
       allow(Gitlab::GitalyClient).to receive(:feature_enabled?).and_return(false)
     else
       next if example.metadata[:skip_gitaly_mock]
+
       allow(Gitlab::GitalyClient).to receive(:feature_enabled?).and_return(true)
     end
   end
diff --git a/spec/unicorn/unicorn_spec.rb b/spec/unicorn/unicorn_spec.rb
index 41de94d35c2..79a566975df 100644
--- a/spec/unicorn/unicorn_spec.rb
+++ b/spec/unicorn/unicorn_spec.rb
@@ -71,6 +71,7 @@ describe 'Unicorn' do
     timeout = 5 * 60
     timeout.times do
       return if File.exist?(ready_file)
+
       pid = Process.waitpid(master_pid, Process::WNOHANG)
       raise "unicorn failed to boot: #{$?}" unless pid.nil?
 
-- 
cgit v1.2.3