Merge branch 'master' into fl-mr-widget-1

* master: (38 commits)
  Added more tests and corrected typos
  Ban Rugged from Repository
  Improve doc/development/automatic_ce_ee_merge.md
  fixed infinite loop crashing tests
  Converted todos.js to axios
  Converted usage_ping.js to use axios
  Converted pager.js to axios
  Converted notifications_form.js to axios
  Converted notes.js to axios
  Converted branch_graph.js to axios
  Converted mini_pipeline_graph_dropdown.js to axios
  Include subgroup issuables on the group page
  Remove grpc and google-protobuf platform-specific version markers in Gemfile.lock
  Replace $.ajax in find file with axios
  Replace $.ajax in activity calendar with axios
  Remove namespaced internationalization import
  Fix subgroup creation docs
  Fix a JSON schema that doesn't include enough fields
  Make user/author use project.creator in most factories
  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.

Gemfile.lock

@@ -340,7 +340,7 @@ GEM
       mime-types (~> 3.0)
       representable (~> 3.0)
       retriable (>= 2.0, < 4.0)
-    google-protobuf (3.4.1.1)
+    google-protobuf (3.5.1.1)
     googleapis-common-protos-types (1.0.1)
       google-protobuf (~> 3.0)
     googleauth (0.5.3)

app/assets/javascripts/awards_handler.js

 /* eslint-disable class-methods-use-this */
 import _ from 'underscore';
 import Cookies from 'js-cookie';
-import { s__ } from './locale';
+import { __ } from './locale';
 import { isInIssuePage, updateTooltipTitle } from './lib/utils/common_utils';
 import flash from './flash';
 import axios from './lib/utils/axios_utils';
@@ -451,7 +451,7 @@ class AwardsHandler {
           callback();
         }
       })
-      .catch(() => flash(s__('Something went wrong on our end.')));
+      .catch(() => flash(__('Something went wrong on our end.')));
     }
   }
 

app/assets/javascripts/lib/utils/common_utils.js

 import { getLocationHash } from './url_utility';
+import axios from './axios_utils';
 
 export const getPagePath = (index = 0) => $('body').attr('data-page').split(':')[index];
 
@@ -382,22 +383,16 @@ export const resetFavicon = () => {
   }
 };
 
-export const setCiStatusFavicon = (pageUrl) => {
-  $.ajax({
-    url: pageUrl,
-    dataType: 'json',
-    success: (data) => {
+export const setCiStatusFavicon = pageUrl =>
+  axios.get(pageUrl)
+    .then(({ data }) => {
       if (data && data.favicon) {
         setFavicon(data.favicon);
       } else {
         resetFavicon();
       }
-    },
-    error: () => {
-      resetFavicon();
-    },
-  });
-};
+    })
+    .catch(resetFavicon);
 
 export const spriteIcon = (icon, className = '') => {
   const classAttribute = className.length > 0 ? `class="${className}"` : '';

app/assets/javascripts/mini_pipeline_graph_dropdown.js

 /* eslint-disable no-new */
-import Flash from './flash';
+import flash from './flash';
+import axios from './lib/utils/axios_utils';
 
 /**
  * In each pipelines table we have a mini pipeline graph for each pipeline.
@@ -78,26 +79,21 @@ export default class MiniPipelineGraph {
     const button = e.relatedTarget;
     const endpoint = button.dataset.stageEndpoint;
 
-    return $.ajax({
-      dataType: 'json',
-      type: 'GET',
-      url: endpoint,
-      beforeSend: () => {
     this.renderBuildsList(button, '');
     this.toggleLoading(button);
-      },
-      success: (data) => {
+
+    axios.get(endpoint)
+      .then(({ data }) => {
         this.toggleLoading(button);
         this.renderBuildsList(button, data.html);
         this.stopDropdownClickPropagation();
-      },
-      error: () => {
+      })
+      .catch(() => {
         this.toggleLoading(button);
         if ($(button).parent().hasClass('open')) {
           $(button).dropdown('toggle');
         }
-        new Flash('An error occurred while fetching the builds.', 'alert');
-      },
+        flash('An error occurred while fetching the builds.', 'alert');
       });
   }
 

app/assets/javascripts/network/branch_graph.js

 /* eslint-disable func-names, space-before-function-paren, no-var, wrap-iife, quotes, comma-dangle, one-var, one-var-declaration-per-line, no-mixed-operators, no-loop-func, no-floating-decimal, consistent-return, no-unused-vars, prefer-template, prefer-arrow-callback, camelcase, max-len */
 
+import { __ } from '../locale';
+import axios from '../lib/utils/axios_utils';
+import flash from '../flash';
 import Raphael from './raphael';
 
 export default (function() {
@@ -26,16 +29,13 @@ export default (function() {
   }
 
   BranchGraph.prototype.load = function() {
-    return $.ajax({
-      url: this.options.url,
-      method: "get",
-      dataType: "json",
-      success: $.proxy(function(data) {
+    axios.get(this.options.url)
+      .then(({ data }) => {
         $(".loading", this.element).hide();
         this.prepareData(data.days, data.commits);
-        return this.buildGraph();
-      }, this)
-    });
+        this.buildGraph();
+      })
+      .catch(() => __('Error fetching network graph.'));
   };
 
   BranchGraph.prototype.prepareData = function(days, commits) {

app/assets/javascripts/notes.js

@@ -16,6 +16,7 @@ import Autosize from 'autosize';
 import 'vendor/jquery.caret'; // required by jquery.atwho
 import 'vendor/jquery.atwho';
 import AjaxCache from '~/lib/utils/ajax_cache';
+import axios from './lib/utils/axios_utils';
 import { getLocationHash } from './lib/utils/url_utility';
 import Flash from './flash';
 import CommentTypeToggle from './comment_type_toggle';
@@ -252,26 +253,20 @@ export default class Notes {
       return;
     }
     this.refreshing = true;
-    return $.ajax({
-      url: this.notes_url,
-      headers: { 'X-Last-Fetched-At': this.last_fetched_at },
-      dataType: 'json',
-      success: (function(_this) {
-        return function(data) {
-          var notes;
-          notes = data.notes;
-          _this.last_fetched_at = data.last_fetched_at;
-          _this.setPollingInterval(data.notes.length);
-          return $.each(notes, function(i, note) {
-            _this.renderNote(note);
+    axios.get(this.notes_url, {
+      headers: {
+        'X-Last-Fetched-At': this.last_fetched_at,
+      },
+    }).then(({ data }) => {
+      const notes = data.notes;
+      this.last_fetched_at = data.last_fetched_at;
+      this.setPollingInterval(data.notes.length);
+      $.each(notes, (i, note) => this.renderNote(note));
+
+      this.refreshing = false;
+    }).catch(() => {
+      this.refreshing = false;
     });
-        };
-      })(this)
-    }).always((function(_this) {
-      return function() {
-        return _this.refreshing = false;
-      };
-    })(this));
   }
 
   /**

app/assets/javascripts/notifications_form.js

+import { __ } from './locale';
+import axios from './lib/utils/axios_utils';
+import flash from './flash';
+
 export default class NotificationsForm {
   constructor() {
     this.toggleCheckbox = this.toggleCheckbox.bind(this);
@@ -27,15 +31,10 @@ export default class NotificationsForm {
   saveEvent($checkbox, $parent) {
     const form = $parent.parents('form:first');
 
-    return $.ajax({
-      url: form.attr('action'),
-      method: form.attr('method'),
-      dataType: 'json',
-      data: form.serialize(),
-      beforeSend: () => {
     this.showCheckboxLoadingSpinner($parent);
-      },
-    }).done((data) => {
+
+    axios[form.attr('method')](form.attr('action'), form.serialize())
+      .then(({ data }) => {
         $checkbox.enable();
         if (data.saved) {
           $parent.find('.custom-notification-event-loading').toggleClass('fa-spin fa-spinner fa-check is-done');
@@ -45,6 +44,7 @@ export default class NotificationsForm {
               .toggleClass('fa-spin fa-spinner fa-check is-done');
           }, 2000);
         }
-    });
+      })
+      .catch(() => flash(__('There was an error saving your notification settings.')));
   }
 }

app/assets/javascripts/pager.js

 import { getParameterByName } from '~/lib/utils/common_utils';
+import axios from './lib/utils/axios_utils';
 import { removeParams } from './lib/utils/url_utility';
 
 const ENDLESS_SCROLL_BOTTOM_PX = 400;
@@ -22,13 +23,12 @@ export default {
 
   getOld() {
     this.loading.show();
-    $.ajax({
-      type: 'GET',
-      url: this.url,
-      data: `limit=${this.limit}&offset=${this.offset}`,
-      dataType: 'json',
-      error: () => this.loading.hide(),
-      success: (data) => {
+    axios.get(this.url, {
+      params: {
+        limit: this.limit,
+        offset: this.offset,
+      },
+    }).then(({ data }) => {
       this.append(data.count, this.prepareData(data.html));
       this.callback();
 
@@ -38,8 +38,7 @@ export default {
       } else {
         this.loading.hide();
       }
-      },
-    });
+    }).catch(() => this.loading.hide());
   },
 
   append(count, html) {

app/assets/javascripts/pages/admin/cohorts/usage_ping.js

+import axios from '../../../lib/utils/axios_utils';
+import { __ } from '../../../locale';
+import flash from '../../../flash';
+
 export default function UsagePing() {
-  const usageDataUrl = $('.usage-data').data('endpoint');
+  const el = document.querySelector('.usage-data');
 
-  $.ajax({
-    type: 'GET',
-    url: usageDataUrl,
-    dataType: 'html',
-    success(html) {
-      $('.usage-data').html(html);
-    },
-  });
+  axios.get(el.dataset.endpoint, {
+    responseType: 'text',
+  }).then(({ data }) => {
+    el.innerHTML = data;
+  }).catch(() => flash(__('Error fetching usage ping data.')));
 }

app/assets/javascripts/pages/dashboard/todos/index/todos.js

@@ -2,6 +2,9 @@
 import { visitUrl } from '~/lib/utils/url_utility';
 import UsersSelect from '~/users_select';
 import { isMetaClick } from '~/lib/utils/common_utils';
+import { __ } from '../../../../locale';
+import flash from '../../../../flash';
+import axios from '../../../../lib/utils/axios_utils';
 
 export default class Todos {
   constructor() {
@@ -59,18 +62,12 @@ export default class Todos {
     const target = e.target;
     target.setAttribute('disabled', true);
     target.classList.add('disabled');
-    $.ajax({
-      type: 'POST',
-      url: target.dataset.href,
-      dataType: 'json',
-      data: {
-        '_method': target.dataset.method,
-      },
-      success: (data) => {
+
+    axios[target.dataset.method](target.dataset.href)
+      .then(({ data }) => {
         this.updateRowState(target);
-        return this.updateBadges(data);
-      },
-    });
+        this.updateBadges(data);
+      }).catch(() => flash(__('Error updating todo status.')));
   }
 
   updateRowState(target) {
@@ -98,19 +95,15 @@ export default class Todos {
     e.preventDefault();
 
     const target = e.currentTarget;
-    const requestData = { '_method': target.dataset.method, ids: this.todo_ids };
     target.setAttribute('disabled', true);
     target.classList.add('disabled');
-    $.ajax({
-      type: 'POST',
-      url: target.dataset.href,
-      dataType: 'json',
-      data: requestData,
-      success: (data) => {
+
+    axios[target.dataset.method](target.dataset.href, {
+      ids: this.todo_ids,
+    }).then(({ data }) => {
       this.updateAllState(target, data);
-        return this.updateBadges(data);
-      },
-    });
+      this.updateBadges(data);
+    }).catch(() => flash(__('Error updating status for all todos.')));
   }
 
   updateAllState(target, data) {

app/assets/javascripts/pages/projects/tree/show/index.js

+import Vue from 'vue';
+import commitPipelineStatus from '~/projects/tree/components/commit_pipeline_status_component.vue';
 import TreeView from '../../../../tree';
 import ShortcutsNavigation from '../../../../shortcuts_navigation';
 import BlobViewer from '../../../../blob/viewer';
@@ -11,5 +13,25 @@ export default () => {
   new NewCommitForm($('.js-create-dir-form')); // eslint-disable-line no-new
   $('#tree-slider').waitForImages(() =>
     ajaxGet(document.querySelector('.js-tree-content').dataset.logsPath));
+
+  const commitPipelineStatusEl = document.getElementById('commit-pipeline-status');
+  const statusLink = document.querySelector('.commit-actions .ci-status-link');
+  if (statusLink != null) {
+    statusLink.remove();
+    // eslint-disable-next-line no-new
+    new Vue({
+      el: commitPipelineStatusEl,
+      components: {
+        commitPipelineStatus,
+      },
+      render(createElement) {
+        return createElement('commit-pipeline-status', {
+          props: {
+            endpoint: commitPipelineStatusEl.dataset.endpoint,
+          },
+        });
+      },
+    });
+  }
 };
 

app/assets/javascripts/project_find_file.js

 /* eslint-disable func-names, space-before-function-paren, no-var, prefer-rest-params, wrap-iife, quotes, consistent-return, one-var, one-var-declaration-per-line, no-cond-assign, max-len, object-shorthand, no-param-reassign, comma-dangle, prefer-template, no-unused-vars, no-return-assign */
 
 import fuzzaldrinPlus from 'fuzzaldrin-plus';
+import axios from '~/lib/utils/axios_utils';
+import flash from '~/flash';
+import { __ } from '~/locale';
 
 // highlight text(awefwbwgtc -> <b>a</b>wefw<b>b</b>wgt<b>c</b> )
 const highlighter = function(element, text, matches) {
@@ -72,19 +75,14 @@ export default class ProjectFindFile {
 
     // files pathes load
   load(url) {
-    return $.ajax({
-      url: url,
-      method: "get",
-      dataType: "json",
-      success: (function(_this) {
-        return function(data) {
-          _this.element.find(".loading").hide();
-          _this.filePaths = data;
-          _this.findFile();
-          return _this.element.find(".files-slider tr.tree-item").eq(0).addClass("selected").focus();
-        };
-      })(this)
-    });
+    axios.get(url)
+      .then(({ data }) => {
+        this.element.find('.loading').hide();
+        this.filePaths = data;
+        this.findFile();
+        this.element.find('.files-slider tr.tree-item').eq(0).addClass('selected').focus();
+      })
+      .catch(() => flash(__('An error occurred while loading filenames')));
   }
 
     // render result

app/assets/javascripts/projects/tree/components/commit_pipeline_status_component.vue

+<script>
+  import Visibility from 'visibilityjs';
+  import ciIcon from '~/vue_shared/components/ci_icon.vue';
+  import loadingIcon from '~/vue_shared/components/loading_icon.vue';
+  import Poll from '~/lib/utils/poll';
+  import Flash from '~/flash';
+  import { s__, sprintf } from '~/locale';
+  import tooltip from '~/vue_shared/directives/tooltip';
+  import CommitPipelineService from '../services/commit_pipeline_service';
+
+  export default {
+    directives: {
+      tooltip,
+    },
+    components: {
+      ciIcon,
+      loadingIcon,
+    },
+    props: {
+      endpoint: {
+        type: String,
+        required: true,
+      },
+      /* This prop can be used to replace some of the `render_commit_status`
+      used across GitLab, this way we could use this vue component and add a
+      realtime status where it makes sense
+      realtime: {
+        type: Boolean,
+        required: false,
+        default: true,
+      }, */
+    },
+    data() {
+      return {
+        ciStatus: {},
+        isLoading: true,
+      };
+    },
+    computed: {
+      statusTitle() {
+        return sprintf(s__('Commits|Commit: %{commitText}'), { commitText: this.ciStatus.text });
+      },
+    },
+    mounted() {
+      this.service = new CommitPipelineService(this.endpoint);
+      this.initPolling();
+    },
+    methods: {
+      successCallback(res) {
+        const pipelines = res.data.pipelines;
+        if (pipelines.length > 0) {
+          // The pipeline entity always keeps the latest pipeline info on the `details.status`
+          this.ciStatus = pipelines[0].details.status;
+        }
+        this.isLoading = false;
+      },
+      errorCallback() {
+        this.ciStatus = {
+          text: 'not found',
+          icon: 'status_notfound',
+          group: 'notfound',
+        };
+        this.isLoading = false;
+        Flash(s__('Something went wrong on our end'));
+      },
+      initPolling() {
+        this.poll = new Poll({
+          resource: this.service,
+          method: 'fetchData',
+          successCallback: response => this.successCallback(response),
+          errorCallback: this.errorCallback,
+        });
+
+        if (!Visibility.hidden()) {
+          this.isLoading = true;
+          this.poll.makeRequest();
+        } else {
+          this.fetchPipelineCommitData();
+        }
+
+        Visibility.change(() => {
+          if (!Visibility.hidden()) {
+            this.poll.restart();
+          } else {
+            this.poll.stop();
+          }
+        });
+      },
+      fetchPipelineCommitData() {
+        this.service.fetchData()
+          .then(this.successCallback)
+          .catch(this.errorCallback);
+      },
+    },
+    destroy() {
+      this.poll.stop();
+    },
+  };
+</script>
+<template>
+  <div>
+    <loading-icon
+      label="Loading pipeline status"
+      size="3"
+      v-if="isLoading"
+    />
+    <a
+      v-else
+      :href="ciStatus.details_path"
+    >
+      <ci-icon
+        v-tooltip
+        :title="statusTitle"
+        :aria-label="statusTitle"
+        data-container="body"
+        :status="ciStatus"
+      />
+    </a>
+  </div>
+</template>

app/assets/javascripts/projects/tree/services/commit_pipeline_service.js

+import axios from '~/lib/utils/axios_utils';
+
+export default class CommitPipelineService {
+  constructor(endpoint) {
+    this.endpoint = endpoint;
+  }
+
+  fetchData() {
+    return axios.get(this.endpoint);
+  }
+}

app/assets/javascripts/render_math.js

@@ -7,7 +7,12 @@
 //
 //   <code class="js-render-math"></div>
 //
-  // Only load once
+
+import { __ } from './locale';
+import axios from './lib/utils/axios_utils';
+import flash from './flash';
+
+// Only load once
 let katexLoaded = false;
 
 // Loop over all math elements and render math
@@ -33,19 +38,26 @@ export default function renderMath($els) {
   if (katexLoaded) {
     renderWithKaTeX($els);
   } else {
-    $.get(gon.katex_css_url, () => {
+    axios.get(gon.katex_css_url)
+      .then(() => {
         const css = $('<link>', {
           rel: 'stylesheet',
           type: 'text/css',
           href: gon.katex_css_url,
         });
         css.appendTo('head');
-
-      // Load KaTeX js
-      $.getScript(gon.katex_js_url, () => {
+      })
+      .then(() => axios.get(gon.katex_js_url, {
+        responseType: 'text',
+      }))
+      .then(({ data }) => {
+        // Add katex js to our document
+        $.globalEval(data);
+      })
+      .then(() => {
         katexLoaded = true;
         renderWithKaTeX($els); // Run KaTeX
-      });
-    });
+      })
+      .catch(() => flash(__('An error occurred while rendering KaTeX')));
   }
 }

app/assets/javascripts/users/activity_calendar.js

 import _ from 'underscore';
 import { scaleLinear, scaleThreshold } from 'd3-scale';
 import { select } from 'd3-selection';
-import { getDayName, getDayDifference } from '../lib/utils/datetime_utility';
+import { getDayName, getDayDifference } from '~/lib/utils/datetime_utility';
+import axios from '~/lib/utils/axios_utils';
+import flash from '~/flash';
+import { __ } from '~/locale';
 
 const d3 = { select, scaleLinear, scaleThreshold };
 
@@ -221,14 +224,16 @@ export default class ActivityCalendar {
         this.currentSelectedDate.getDate(),
       ].join('-');
 
-      $.ajax({
-        url: this.calendarActivitiesPath,
-        data: { date },
-        cache: false,
-        dataType: 'html',
-        beforeSend: () => $('.user-calendar-activities').html(LOADING_HTML),
-        success: data => $('.user-calendar-activities').html(data),
-      });
+      $('.user-calendar-activities').html(LOADING_HTML);
+
+      axios.get(this.calendarActivitiesPath, {
+        params: {
+          date,
+        },
+        responseType: 'text',
+      })
+      .then(({ data }) => $('.user-calendar-activities').html(data))
+      .catch(() => flash(__('An error occurred while retrieving calendar activity')));
     } else {
       this.currentSelectedDate = '';
       $('.user-calendar-activities').html('');

app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.js

-export default {
-  name: 'MRWidgetRelatedLinks',
-  props: {
-    relatedLinks: { type: Object, required: true },
-    state: { type: String, required: false },
-  },
-  computed: {
-    hasLinks() {
-      const { closing, mentioned, assignToMe } = this.relatedLinks;
-      return closing || mentioned || assignToMe;
-    },
-    closesText() {
-      if (this.state === 'merged') {
-        return 'Closed';
-      }
-      if (this.state === 'closed') {
-        return 'Did not close';
-      }
-      return 'Closes';
-    },
-  },
-  template: `
-    <section
-      v-if="hasLinks"
-      class="mr-info-list mr-links">
-      <p v-if="relatedLinks.closing">
-        {{closesText}} <span v-html="relatedLinks.closing"></span>
-      </p>
-      <p v-if="relatedLinks.mentioned">
-        Mentions <span v-html="relatedLinks.mentioned"></span>
-      </p>
-      <p v-if="relatedLinks.assignToMe">
-        <span v-html="relatedLinks.assignToMe"></span>
-      </p>
-    </section>
-  `,
-};

app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.vue

+<script>
+  import { s__ } from '~/locale';
+
+  export default {
+    name: 'MRWidgetRelatedLinks',
+    props: {
+      relatedLinks: {
+        type: Object,
+        required: true,
+        default: () => ({}),
+      },
+      state: {
+        type: String,
+        required: false,
+        default: '',
+      },
+    },
+    computed: {
+      closesText() {
+        if (this.state === 'merged') {
+          return s__('mrWidget|Closed');
+        }
+        if (this.state === 'closed') {
+          return s__('mrWidget|Did not close');
+        }
+        return s__('mrWidget|Closes');
+      },
+    },
+  };
+</script>
+<template>
+  <section class="mr-info-list mr-links">
+    <p v-if="relatedLinks.closing">
+      {{ closesText }} <span v-html="relatedLinks.closing"></span>
+    </p>
+    <p v-if="relatedLinks.mentioned">
+      {{ s__("mrWidget|Mentions") }} <span v-html="relatedLinks.mentioned"></span>
+    </p>
+    <p v-if="relatedLinks.assignToMe">
+      <span v-html="relatedLinks.assignToMe"></span>
+    </p>
+  </section>
+</template>

app/assets/javascripts/vue_merge_request_widget/dependencies.js

@@ -15,7 +15,7 @@ export { default as WidgetHeader } from './components/mr_widget_header.vue';
 export { default as WidgetMergeHelp } from './components/mr_widget_merge_help.vue';
 export { default as WidgetPipeline } from './components/mr_widget_pipeline.vue';
 export { default as WidgetDeployment } from './components/mr_widget_deployment';
-export { default as WidgetRelatedLinks } from './components/mr_widget_related_links';
+export { default as WidgetRelatedLinks } from './components/mr_widget_related_links.vue';
 export { default as MergedState } from './components/states/mr_widget_merged.vue';
 export { default as FailedToMerge } from './components/states/mr_widget_failed_to_merge.vue';
 export { default as ClosedState } from './components/states/mr_widget_closed.vue';

app/assets/javascripts/vue_merge_request_widget/mr_widget_options.js

@@ -257,7 +257,8 @@ export default {
         <mr-widget-related-links
           v-if="shouldRenderRelatedLinks"
           :state="mr.state"
-          :related-links="mr.relatedLinks" />
+          :related-links="mr.relatedLinks"
+          />
       </div>
       <div
         class="mr-widget-footer"

app/assets/stylesheets/pages/commits.scss

@@ -195,6 +195,18 @@
 .commit-actions {
   @media (min-width: $screen-sm-min) {
     font-size: 0;
+
+    div {
+      display: inline;
+    }
+
+    .fa-spinner {
+      font-size: 12px;
+    }
+
+    span {
+      font-size: 6px;
+    }
   }
 
   .ci-status-link {
@@ -219,6 +231,11 @@
     font-size: 14px;
     font-weight: $gl-font-weight-bold;
   }
+
+  .ci-status-icon {
+    position: relative;
+    top: 1px;
+  }
 }
 
 .commit,

app/controllers/admin/gitaly_servers_controller.rb

+class Admin::GitalyServersController < Admin::ApplicationController
+  def index
+    @gitaly_servers = Gitaly::Server.all
+  end
+end

app/controllers/concerns/issuable_collections.rb

@@ -94,6 +94,7 @@ module IssuableCollections
       @filter_params[:project_id] = @project.id
     elsif @group
       @filter_params[:group_id] = @group.id
+      @filter_params[:include_subgroups] = true
     else
       # TODO: this filter ignore issues/mr created in public or
       # internal repos where you are not a member. Enable this filter

app/controllers/groups_controller.rb

@@ -118,10 +118,10 @@ class GroupsController < Groups::ApplicationController
   end
 
   def group_params
-    params.require(:group).permit(group_params_ce)
+    params.require(:group).permit(group_params_attributes)
   end
 
-  def group_params_ce
+  def group_params_attributes
     [
       :avatar,
       :description,
@@ -150,7 +150,6 @@ class GroupsController < Groups::ApplicationController
     @projects = GroupProjectsFinder.new(params: params, group: group, options: options, current_user: current_user)
                   .execute
                   .includes(:namespace)
-                  .page(params[:page])
 
     @events = EventCollection
       .new(@projects, offset: params[:offset].to_i, filter: event_filter)

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/finders/group_projects_finder.rb

@@ -87,9 +87,18 @@ class GroupProjectsFinder < ProjectsFinder
     options.fetch(:only_shared, false)
   end
 
+  # subgroups are supported only for owned projects not for shared
+  def include_subgroups?
+    options.fetch(:include_subgroups, false)
+  end
+
   def owned_projects
+    if include_subgroups?
+      Project.where(namespace_id: group.self_and_descendants.select(:id))
+    else
       group.projects
     end
+  end
 
   def shared_projects
     group.shared_projects

app/finders/issuable_finder.rb

@@ -43,6 +43,7 @@ class IssuableFinder
     search
     sort
     state
+    include_subgroups
   ].freeze
   ARRAY_PARAMS = { label_name: [], iids: [], assignee_username: [] }.freeze
 
@@ -148,7 +149,8 @@ class IssuableFinder
       if current_user && params[:authorized_only].presence && !current_user_related?
         current_user.authorized_projects
       elsif group
-        GroupProjectsFinder.new(group: group, current_user: current_user).execute
+        finder_options = { include_subgroups: params[:include_subgroups], only_owned: true }
+        GroupProjectsFinder.new(group: group, current_user: current_user, options: finder_options).execute
       else
         ProjectsFinder.new(current_user: current_user, project_ids_relation: item_project_ids(items)).execute
       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/repository.rb

@@ -852,7 +852,7 @@ class Repository
     @root_ref_sha ||= commit(root_ref).sha
   end
 
-  delegate :merged_branch_names, to: :raw_repository
+  delegate :merged_branch_names, :can_be_merged?, to: :raw_repository
 
   def merge_base(first_commit_id, second_commit_id)
     first_commit_id = commit(first_commit_id).try(:id) || first_commit_id
@@ -951,7 +951,7 @@ class Repository
           end
 
         instance_variable_set(ivar, value)
-      rescue Rugged::ReferenceError, Gitlab::Git::Repository::NoRepository
+      rescue Gitlab::Git::Repository::NoRepository
         # Even if the above `#exists?` check passes these errors might still
         # occur (for example because of a non-existing HEAD). We want to
         # gracefully handle this and not cache anything

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

app/views/admin/dashboard/index.html.haml

@@ -138,19 +138,11 @@
               GitLab API
               %span.pull-right
                 = API::API::version
-            %p
-              Gitaly
-              %span.pull-right
-                = Gitlab::GitalyClient.expected_server_version
             - if Gitlab.config.pages.enabled
               %p
                 GitLab Pages
                 %span.pull-right
                   = Gitlab::Pages::VERSION
-            %p
-              Git
-              %span.pull-right
-                = Gitlab::Git.version
             %p
               Ruby
               %span.pull-right
@@ -163,6 +155,8 @@
               = Gitlab::Database.adapter_name
               %span.pull-right
                 = Gitlab::Database.version
+            %p
+              = link_to "Gitaly Servers", admin_gitaly_servers_path
     .row
       .col-md-4
         .info-well

app/views/admin/gitaly_servers/index.html.haml

+- breadcrumb_title _("Gitaly Servers")
+
+%h3.page-title= _("Gitaly Servers")
+%hr
+.gitaly_servers
+  - if @gitaly_servers.any?
+    .table-holder
+      %table.table.responsive-table
+        %thead.hidden-sm.hidden-xs
+          %tr
+            %th= _("Storage")
+            %th= n_("Gitaly|Address")
+            %th= _("Server version")
+            %th= _("Git version")
+            %th= _("Up to date")
+        - @gitaly_servers.each do |server|
+          %tr
+            %td
+              = server.storage
+            %td
+              = server.address
+            %td
+              = server.server_version
+            %td
+              = server.git_binary_version
+            %td
+              = boolean_to_icon(server.up_to_date?)
+  - else
+    .empty-state
+      .text-center
+        %h4= _("No connection could be made to a Gitaly Server, please check your logs!")

app/views/projects/commits/_commit.html.haml

@@ -51,6 +51,7 @@
         - if commit.status(ref)
           = render_commit_status(commit, ref: ref)
 
+        #commit-pipeline-status{ data: { endpoint: pipelines_project_commit_path(project, commit.id) } }
         = link_to commit.short_id, link, class: "commit-sha btn btn-transparent btn-link"
         = clipboard_button(text: commit.id, title: _("Copy commit SHA to clipboard"))
         = link_to_browse_code(project, commit)

changelogs/unreleased/30106-group-issues.yml

+---
+title: Include subgroup issues and merge requests on the group page
+merge_request:
+author:
+type: changed

changelogs/unreleased/35779-realtime-update-of-pipeline-status-in-files-view.yml

+---
+title: Add realtime ci status for the repository -> files view
+merge_request: 16523
+author:
+type: added

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

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

changelogs/unreleased/fix-install-docs.yml

+---
+title: Update minimum git version to 2.9.5
+merge_request: 16683
+author:
+type: other

changelogs/unreleased/sh-fix-events-collection.yml

+---
+title: Fix not all events being shown in group dashboard
+merge_request:
+author:
+type: fixed

changelogs/unreleased/sh-fix-project-members-api-perf.yml

+---
+title: Remove N+1 queries with /projects/:project_id/{access_requests,members} API
+  endpoints
+merge_request:
+author:
+type: performance

changelogs/unreleased/zj-gitaly-server-info.yml

+---
+title: Add Gitaly Servers admin dashboard
+merge_request:
+author:
+type: added

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
@@ -24,6 +24,8 @@ namespace :admin do
   resource :impersonation, only: :destroy
 
   resources :abuse_reports, only: [:index, :destroy]
+  resources :gitaly_servers, only: [:index]
+
   resources :spam_logs, only: [:index, :destroy] do
     member do
       post :mark_as_ham

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

config/routes/project.rb

@@ -40,7 +40,7 @@ constraints(ProjectUrlConstrainer.new) do
       #
       # Templates
       #
-      get '/templates/:template_type/:key' => 'templates#show', as: :template, constraints: { key: /[^\/]+/ }
+      get '/templates/:template_type/:key' => 'templates#show', as: :template, constraints: { key: %r{[^/]+} }
 
       resource  :avatar, only: [:show, :destroy]
       resources :commit, only: [:show], constraints: { id: /\h{7,40}/ } do
@@ -55,7 +55,7 @@ constraints(ProjectUrlConstrainer.new) do
       end
 
       resource :pages, only: [:show, :destroy] do
-        resources :domains, only: [:show, :new, :create, :destroy], controller: 'pages_domains', constraints: { id: /[^\/]+/ }
+        resources :domains, only: [:show, :new, :create, :destroy], controller: 'pages_domains', constraints: { id: %r{[^/]+} }
       end
 
       resources :snippets, concerns: :awardable, constraints: { id: /\d+/ } do
@@ -65,7 +65,7 @@ constraints(ProjectUrlConstrainer.new) do
         end
       end
 
-      resources :services, constraints: { id: /[^\/]+/ }, only: [:index, :edit, :update] do
+      resources :services, constraints: { id: %r{[^/]+} }, only: [:index, :edit, :update] do
         member do
           put :test
         end
@@ -346,7 +346,7 @@ constraints(ProjectUrlConstrainer.new) do
         end
       end
 
-      resources :project_members, except: [:show, :new, :edit], constraints: { id: /[a-zA-Z.\/0-9_\-#%+]+/ }, concerns: :access_requestable do
+      resources :project_members, except: [:show, :new, :edit], constraints: { id: %r{[a-zA-Z./0-9_\-#%+]+} }, concerns: :access_requestable do
         collection do
           delete :leave
 
@@ -379,7 +379,7 @@ constraints(ProjectUrlConstrainer.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
 

config/routes/uploads.rb

@@ -2,17 +2,17 @@ scope path: :uploads do
   # Note attachments and User/Group/Project avatars
   get "-/system/:model/:mounted_as/:id/:filename",
       to:           "uploads#show",
-      constraints:  { model: /note|user|group|project/, mounted_as: /avatar|attachment/, filename: /[^\/]+/ }
+      constraints:  { model: /note|user|group|project/, mounted_as: /avatar|attachment/, filename: %r{[^/]+} }
 
   # show uploads for models, snippets (notes) available for now
   get '-/system/:model/:id/:secret/:filename',
     to: 'uploads#show',
-    constraints: { model: /personal_snippet/, id: /\d+/, filename: /[^\/]+/ }
+    constraints: { model: /personal_snippet/, id: /\d+/, filename: %r{[^/]+} }
 
   # show temporary uploads
   get '-/system/temp/:secret/:filename',
     to: 'uploads#show',
-    constraints: { filename: /[^\/]+/ }
+    constraints: { filename: %r{[^/]+} }
 
   # Appearance
   get "-/system/:model/:mounted_as/:id/:filename",
@@ -22,7 +22,7 @@ scope path: :uploads do
   # Project markdown uploads
   get ":namespace_id/:project_id/:secret/:filename",
     to:           "projects/uploads#show",
-    constraints:  { namespace_id: /[a-zA-Z.0-9_\-]+/, project_id: /[a-zA-Z.0-9_\-]+/, filename: /[^\/]+/ }
+    constraints:  { namespace_id: /[a-zA-Z.0-9_\-]+/, project_id: /[a-zA-Z.0-9_\-]+/, filename: %r{[^/]+} }
 
   # create uploads for models, snippets (notes) available for now
   post ':model',
@@ -34,4 +34,4 @@ end
 # Redirect old note attachments path to new uploads path.
 get "files/note/:id/:filename",
   to:           redirect("uploads/note/attachment/%{id}/%{filename}"),
-  constraints:  { filename: /[^\/]+/ }
+  constraints:  { filename: %r{[^/]+} }

doc/development/automatic_ce_ee_merge.md

@@ -5,17 +5,32 @@ Enterprise Edition (look for the [`CE Upstream` merge requests]).
 
 This merge is done automatically in a
 [scheduled pipeline](https://gitlab.com/gitlab-org/release-tools/-/jobs/43201679).
-If a merge is already in progress, the job [doesn't create a new one](https://gitlab.com/gitlab-org/release-tools/-/jobs/43157687).
 
-**If you are pinged in a `CE Upstream` merge request to resolve a conflict,
-please resolve the conflict as soon as possible or ask someone else to do it!**
-
->**Note:**
-It's ok to resolve more conflicts than the one that you are asked to resolve. In
-that case, it's a good habit to ask for a double-check on your resolution by
-someone who is familiar with the code you touched.
+## What to do if you are pinged in a `CE Upstream` merge request to resolve a conflict?
+
+1. Please resolve the conflict as soon as possible or ask someone else to do it
+  - It's ok to resolve more conflicts than the one that you are asked to resolve.
+    In that case, it's a good habit to ask for a double-check on your resolution
+    by someone who is familiar with the code you touched.
+1. Once you have resolved your conflicts, push to the branch (no force-push)
+1. Assign the merge request to the next person that has to resolve a conflict
+1. If all conflicts are resolved after your resolution is pushed, keep the merge
+  request assigned to you: **you are now responsible for the merge request to be
+  green**
+1. If you need any help, you can ping the current [release managers], or ask in
+  the `#ce-to-ee` Slack channel
+
+A few notes about the automatic CE->EE merge job:
+
+- If a merge is already in progress, the job
+  [doesn't create a new one](https://gitlab.com/gitlab-org/release-tools/-/jobs/43157687).
+- If there is nothing to merge (i.e. EE is up-to-date with CE), the job doesn't
+  create a new one
+- The job posts messages to the `#ce-to-ee` Slack channel to inform what's the
+  current CE->EE merge status (e.g. "A new MR has been created", "A MR is still pending")
 
 [`CE Upstream` merge requests]: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests?label_name%5B%5D=CE+upstream
+[release managers]: https://about.gitlab.com/release-managers/
 
 ## Always merge EE merge requests before their CE counterparts
 

doc/install/installation.md

@@ -80,7 +80,7 @@ Make sure you have the right version of Git installed
     # Install Git
     sudo apt-get install -y git-core
 
-    # Make sure Git is version 2.14.3 or higher
+    # Make sure Git is version 2.9.5 or higher
     git --version
 
 Is the system packaged Git too old? Remove it and compile from source.
@@ -93,9 +93,9 @@ Is the system packaged Git too old? Remove it and compile from source.
 
     # Download and compile from source
     cd /tmp
-    curl --remote-name --progress https://www.kernel.org/pub/software/scm/git/git-2.8.4.tar.gz
-    echo '626e319f8a24fc0866167ea5f6bf3e2f38f69d6cb2e59e150f13709ca3ebf301  git-2.8.4.tar.gz' | shasum -a256 -c - && tar -xzf git-2.8.4.tar.gz
-    cd git-2.8.4/
+    curl --remote-name --progress https://www.kernel.org/pub/software/scm/git/git-2.14.3.tar.gz
+    echo '023ffff6d3ba8a1bea779dfecc0ed0bb4ad68ab8601d14435dd8c08416f78d7f  git-2.14.3.tar.gz' | shasum -a256 -c - && tar -xzf git-2.14.3.tar.gz
+    cd git-2.14.3/
     ./configure
     make prefix=/usr/local all
 

doc/user/group/subgroups/index.md

@@ -90,7 +90,8 @@ structure.
 
 To create a subgroup:
 
-1. In the group's dashboard go to the **Subgroups** page and click **New subgroup**.
+1. In the group's dashboard expand the **New project** split button, select
+   **New subgroup** and click the **New subgroup** button.
 
     ![Subgroups page](img/create_subgroup_button.png)
 

features/steps/project/source/markdown_render.rb

@@ -193,7 +193,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
   end
 
   step 'The link with text "/ID" should have url "tree/markdownID"' do
-    find('a', text: /^\/#id$/)['href'] == current_host + project_tree_path(@project, "markdown") + '#id'
+    find('a', text: %r{^/#id$})['href'] == current_host + project_tree_path(@project, "markdown") + '#id'
   end
 
   step 'The link with text "README.mdID" '\
@@ -203,7 +203,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
 
   step 'The link with text "d/README.mdID" should have '\
        'url "blob/markdown/d/README.mdID"' do
-    find('a', text: /^d\/README.md#id$/)['href'] == current_host + project_blob_path(@project, "d/markdown/README.md") + '#id'
+    find('a', text: %r{^d/README.md#id$})['href'] == current_host + project_blob_path(@project, "d/markdown/README.md") + '#id'
   end
 
   step 'The link with text "ID" should have url "blob/markdown/README.mdID"' do
@@ -212,7 +212,7 @@ class Spinach::Features::ProjectSourceMarkdownRender < Spinach::FeatureSteps
   end
 
   step 'The link with text "/ID" should have url "blob/markdown/README.mdID"' do
-    find('a', text: /^\/#id$/)['href'] == current_host + project_blob_path(@project, "markdown/README.md") + '#id'
+    find('a', text: %r{^/#id$})['href'] == current_host + project_blob_path(@project, "markdown/README.md") + '#id'
   end
 
   # Wiki

lib/api/access_requests.rb

@@ -24,7 +24,7 @@ module API
           access_requesters = AccessRequestsFinder.new(source).execute!(current_user)
           access_requesters = paginate(access_requesters.includes(:user))
 
-          present access_requesters.map(&:user), with: Entities::AccessRequester, source: source
+          present access_requesters, with: Entities::AccessRequester
         end
 
         desc "Requests access for the authenticated user to a #{source_type}." do
@@ -36,7 +36,7 @@ module API
           access_requester = source.request_access(current_user)
 
           if access_requester.persisted?
-            present access_requester.user, with: Entities::AccessRequester, access_requester: access_requester
+            present access_requester, with: Entities::AccessRequester
           else
             render_validation_error!(access_requester)
           end
@@ -56,7 +56,7 @@ module API
           member = ::Members::ApproveAccessRequestService.new(source, current_user, declared_params).execute
 
           status :created
-          present member.user, with: Entities::Member, member: member
+          present member, with: Entities::Member
         end
 
         desc 'Denies an access request for the given user.' do

lib/api/entities.rb

@@ -205,22 +205,15 @@ module API
       expose :build_artifacts_size, as: :job_artifacts_size
     end
 
-    class Member < UserBasic
-      expose :access_level do |user, options|
-        member = options[:member] || options[:source].members.find_by(user_id: user.id)
-        member.access_level
-      end
-      expose :expires_at do |user, options|
-        member = options[:member] || options[:source].members.find_by(user_id: user.id)
-        member.expires_at
-      end
+    class Member < Grape::Entity
+      expose :user, merge: true, using: UserBasic
+      expose :access_level
+      expose :expires_at
     end
 
-    class AccessRequester < UserBasic
-      expose :requested_at do |user, options|
-        access_requester = options[:access_requester] || options[:source].requesters.find_by(user_id: user.id)
-        access_requester.requested_at
-      end
+    class AccessRequester < Grape::Entity
+      expose :user, merge: true, using: UserBasic
+      expose :requested_at
     end
 
     class Group < Grape::Entity

lib/api/members.rb

@@ -21,10 +21,11 @@ module API
         get ":id/members" do
           source = find_source(source_type, params[:id])
 
-          users = source.users
-          users = users.merge(User.search(params[:query])) if params[:query].present?
+          members = source.members.where.not(user_id: nil).includes(:user)
+          members = members.joins(:user).merge(User.search(params[:query])) if params[:query].present?
+          members = paginate(members)
 
-          present paginate(users), with: Entities::Member, source: source
+          present members, with: Entities::Member
         end
 
         desc 'Gets a member of a group or project.' do
@@ -39,7 +40,7 @@ module API
           members = source.members
           member = members.find_by!(user_id: params[:user_id])
 
-          present member.user, with: Entities::Member, member: member
+          present member, with: Entities::Member
         end
 
         desc 'Adds a member to a group or project.' do
@@ -62,7 +63,7 @@ module API
           if !member
             not_allowed! # This currently can only be reached in EE
           elsif member.persisted? && member.valid?
-            present member.user, with: Entities::Member, member: member
+            present member, with: Entities::Member
           else
             render_validation_error!(member)
           end
@@ -83,7 +84,7 @@ module API
           member = source.members.find_by!(user_id: params.delete(:user_id))
 
           if member.update_attributes(declared_params(include_missing: false))
-            present member.user, with: Entities::Member, member: member
+            present member, with: Entities::Member
           else
             render_validation_error!(member)
           end

lib/api/templates.rb

@@ -17,15 +17,15 @@ module API
       }
     }.freeze
     PROJECT_TEMPLATE_REGEX =
-      /[\<\{\[]
+      %r{[\<\{\[]
         (project|description|
         one\sline\s.+\swhat\sit\sdoes\.) # matching the start and end is enough here
-      [\>\}\]]/xi.freeze
+      [\>\}\]]}xi.freeze
     YEAR_TEMPLATE_REGEX = /[<{\[](year|yyyy)[>}\]]/i.freeze
     FULLNAME_TEMPLATE_REGEX =
-      /[\<\{\[]
+      %r{[\<\{\[]
         (fullname|name\sof\s(author|copyright\sowner))
-      [\>\}\]]/xi.freeze
+      [\>\}\]]}xi.freeze
 
     helpers do
       def parsed_license_template

lib/api/v3/members.rb

@@ -22,10 +22,11 @@ module API
           get ":id/members" do
             source = find_source(source_type, params[:id])
 
-            users = source.users
-            users = users.merge(User.search(params[:query])) if params[:query].present?
+            members = source.members.where.not(user_id: nil).includes(:user)
+            members = members.joins(:user).merge(User.search(params[:query])) if params[:query].present?
+            members = paginate(members)
 
-            present paginate(users), with: ::API::Entities::Member, source: source
+            present members, with: ::API::Entities::Member
           end
 
           desc 'Gets a member of a group or project.' do
@@ -40,7 +41,7 @@ module API
             members = source.members
             member = members.find_by!(user_id: params[:user_id])
 
-            present member.user, with: ::API::Entities::Member, member: member
+            present member, with: ::API::Entities::Member
           end
 
           desc 'Adds a member to a group or project.' do
@@ -69,7 +70,7 @@ module API
             end
 
             if member.persisted? && member.valid?
-              present member.user, with: ::API::Entities::Member, member: member
+              present member, with: ::API::Entities::Member
             else
               # This is to ensure back-compatibility but 400 behavior should be used
               # for all validation errors in 9.0!
@@ -93,7 +94,7 @@ module API
             member = source.members.find_by!(user_id: params.delete(:user_id))
 
             if member.update_attributes(declared_params(include_missing: false))
-              present member.user, with: ::API::Entities::Member, member: member
+              present member, with: ::API::Entities::Member
             else
               # This is to ensure back-compatibility but 400 behavior should be used
               # for all validation errors in 9.0!
@@ -125,7 +126,7 @@ module API
             else
               ::Members::DestroyService.new(source, current_user, declared_params).execute
 
-              present member.user, with: ::API::Entities::Member, member: member
+              present member, with: ::API::Entities::Member
             end
           end
         end

lib/api/v3/projects.rb

@@ -173,7 +173,7 @@ module API
           use :sort_params
           use :pagination
         end
-        get "/search/:query", requirements: { query: /[^\/]+/ } do
+        get "/search/:query", requirements: { query: %r{[^/]+} } do
           search_service = Search::GlobalService.new(current_user, search: params[:query]).execute
           projects = search_service.objects('projects', params[:page], false)
           projects = projects.reorder(params[:order_by] => params[:sort])

lib/api/v3/templates.rb

@@ -16,15 +16,15 @@ module API
         }
       }.freeze
       PROJECT_TEMPLATE_REGEX =
-        /[\<\{\[]
+        %r{[\<\{\[]
           (project|description|
           one\sline\s.+\swhat\sit\sdoes\.) # matching the start and end is enough here
-        [\>\}\]]/xi.freeze
+        [\>\}\]]}xi.freeze
       YEAR_TEMPLATE_REGEX = /[<{\[](year|yyyy)[>}\]]/i.freeze
       FULLNAME_TEMPLATE_REGEX =
-        /[\<\{\[]
+        %r{[\<\{\[]
           (fullname|name\sof\s(author|copyright\sowner))
-        [\>\}\]]/xi.freeze
+        [\>\}\]]}xi.freeze
       DEPRECATION_MESSAGE = ' This endpoint is deprecated and has been removed in V4.'.freeze
 
       helpers do

lib/banzai/filter/emoji_filter.rb

@@ -54,9 +54,9 @@ module Banzai
       # Build a regexp that matches all valid :emoji: names.
       def self.emoji_pattern
         @emoji_pattern ||=
-          /(?<=[^[:alnum:]:]|\n|^)
+          %r{(?<=[^[:alnum:]:]|\n|^)
           :(#{Gitlab::Emoji.emojis_names.map { |name| Regexp.escape(name) }.join('|')}):
-          (?=[^[:alnum:]:]|$)/x
+          (?=[^[:alnum:]:]|$)}x
       end
 
       # Build a regexp that matches all valid unicode emojis names.

lib/banzai/filter/gollum_tags_filter.rb

@@ -51,10 +51,10 @@ module Banzai
       # See https://github.com/gollum/gollum/wiki
       #
       # Rubular: http://rubular.com/r/7dQnE5CUCH
-      TAGS_PATTERN = %r{\[\[(.+?)\]\]}.freeze
+      TAGS_PATTERN = /\[\[(.+?)\]\]/.freeze
 
       # Pattern to match allowed image extensions
-      ALLOWED_IMAGE_EXTENSIONS = %r{.+(jpg|png|gif|svg|bmp)\z}i.freeze
+      ALLOWED_IMAGE_EXTENSIONS = /.+(jpg|png|gif|svg|bmp)\z/i.freeze
 
       def call
         search_text_nodes(doc).each do |node|

lib/container_registry/registry.rb

@@ -11,7 +11,7 @@ module ContainerRegistry
     private
 
     def default_path
-      @uri.sub(/^https?:\/\//, '')
+      @uri.sub(%r{^https?://}, '')
     end
   end
 end

lib/extracts_path.rb

@@ -56,7 +56,7 @@ module ExtractsPath
 
       if valid_refs.length == 0
         # No exact ref match, so just try our best
-        pair = id.match(/([^\/]+)(.*)/).captures
+        pair = id.match(%r{([^/]+)(.*)}).captures
       else
         # There is a distinct possibility that multiple refs prefix the ID.
         # Use the longest match to maximize the chance that we have the
@@ -68,7 +68,7 @@ module ExtractsPath
     end
 
     # Remove ending slashes from path
-    pair[1].gsub!(/^\/|\/$/, '')
+    pair[1].gsub!(%r{^/|/$}, '')
 
     pair
   end

lib/gitaly/server.rb

+module Gitaly
+  class Server
+    def self.all
+      Gitlab.config.repositories.storages.keys.map { |s| Gitaly::Server.new(s) }
+    end
+
+    attr_reader :storage
+
+    def initialize(storage)
+      @storage = storage
+    end
+
+    def server_version
+      info.server_version
+    end
+
+    def git_binary_version
+      info.git_version
+    end
+
+    def up_to_date?
+      server_version == Gitlab::GitalyClient.expected_server_version
+    end
+
+    def address
+      Gitlab::GitalyClient.address(@storage)
+    rescue RuntimeError => e
+      "Error getting the address: #{e.message}"
+    end
+
+    private
+
+    def info
+      @info ||=
+        begin
+          Gitlab::GitalyClient::ServerService.new(@storage).info
+        rescue GRPC::Unavailable, GRPC::GRPC::DeadlineExceeded
+          # This will show the server as being out of date
+          Gitaly::ServerInfoResponse.new(git_version: '', server_version: '')
+        end
+    end
+  end
+end

lib/gitlab/background_migration/populate_untracked_uploads.rb

@@ -12,7 +12,7 @@ module Gitlab
 
         # Ends with /:random_hex/:filename
         FILE_UPLOADER_PATH = %r{/\h+/[^/]+\z}
-        FULL_PATH_CAPTURE = %r{\A(.+)#{FILE_UPLOADER_PATH}}
+        FULL_PATH_CAPTURE = /\A(.+)#{FILE_UPLOADER_PATH}/
 
         # These regex patterns are tested against a relative path, relative to
         # the upload directory.

lib/gitlab/ci/build/artifacts/metadata/entry.rb

@@ -97,7 +97,7 @@ module Gitlab
             end
 
             def total_size
-              descendant_pattern = %r{^#{Regexp.escape(@path.to_s)}}
+              descendant_pattern = /^#{Regexp.escape(@path.to_s)}/
               entries.sum do |path, entry|
                 (entry[:size] if path =~ descendant_pattern).to_i
               end

lib/gitlab/dependency_linker/composer_json_linker.rb

@@ -11,7 +11,7 @@ module Gitlab
       end
 
       def package_url(name)
-        "https://packagist.org/packages/#{name}" if name =~ %r{\A#{REPO_REGEX}\z}
+        "https://packagist.org/packages/#{name}" if name =~ /\A#{REPO_REGEX}\z/
       end
     end
   end

lib/gitlab/dependency_linker/gemfile_linker.rb

@@ -15,7 +15,7 @@ module Gitlab
         link_regex(/(github:|:github\s*=>)\s*['"](?<name>[^'"]+)['"]/, &method(:github_url))
 
         # Link `git: "https://gitlab.example.com/user/repo"` to https://gitlab.example.com/user/repo
-        link_regex(%r{(git:|:git\s*=>)\s*['"](?<name>#{URL_REGEX})['"]}, &:itself)
+        link_regex(/(git:|:git\s*=>)\s*['"](?<name>#{URL_REGEX})['"]/, &:itself)
 
         # Link `source "https://rubygems.org"` to https://rubygems.org
         link_method_call('source', URL_REGEX, &:itself)

lib/gitlab/dependency_linker/podspec_linker.rb

@@ -12,7 +12,7 @@ module Gitlab
       def link_dependencies
         link_method_call('homepage', URL_REGEX, &:itself)
 
-        link_regex(%r{(git:|:git\s*=>)\s*['"](?<name>#{URL_REGEX})['"]}, &:itself)
+        link_regex(/(git:|:git\s*=>)\s*['"](?<name>#{URL_REGEX})['"]/, &:itself)
 
         link_method_call('license', &method(:license_url))
         link_regex(/license\s*=\s*\{\s*(type:|:type\s*=>)\s*#{STRING_REGEX}/, &method(:license_url))

lib/gitlab/email/reply_parser.rb

@@ -43,7 +43,7 @@ module Gitlab
         return "" unless decoded
 
         # Certain trigger phrases that means we didn't parse correctly
-        if decoded =~ /(Content\-Type\:|multipart\/alternative|text\/plain)/
+        if decoded =~ %r{(Content\-Type\:|multipart/alternative|text/plain)}
           return ""
         end
 

lib/gitlab/file_detector.rb

@@ -6,14 +6,14 @@ module Gitlab
   module FileDetector
     PATTERNS = {
       # Project files
-      readme: /\Areadme[^\/]*\z/i,
-      changelog: /\A(changelog|history|changes|news)[^\/]*\z/i,
-      license: /\A(licen[sc]e|copying)(\.[^\/]+)?\z/i,
-      contributing: /\Acontributing[^\/]*\z/i,
+      readme: %r{\Areadme[^/]*\z}i,
+      changelog: %r{\A(changelog|history|changes|news)[^/]*\z}i,
+      license: %r{\A(licen[sc]e|copying)(\.[^/]+)?\z}i,
+      contributing: %r{\Acontributing[^/]*\z}i,
       version: 'version',
       avatar: /\Alogo\.(png|jpg|gif)\z/,
-      issue_template: /\A\.gitlab\/issue_templates\/[^\/]+\.md\z/,
-      merge_request_template: /\A\.gitlab\/merge_request_templates\/[^\/]+\.md\z/,
+      issue_template: %r{\A\.gitlab/issue_templates/[^/]+\.md\z},
+      merge_request_template: %r{\A\.gitlab/merge_request_templates/[^/]+\.md\z},
 
       # Configuration files
       gitignore: '.gitignore',
@@ -22,17 +22,17 @@ module Gitlab
       route_map: '.gitlab/route-map.yml',
 
       # Dependency files
-      cartfile: /\ACartfile[^\/]*\z/,
+      cartfile: %r{\ACartfile[^/]*\z},
       composer_json: 'composer.json',
       gemfile: /\A(Gemfile|gems\.rb)\z/,
       gemfile_lock: 'Gemfile.lock',
-      gemspec: /\A[^\/]*\.gemspec\z/,
+      gemspec: %r{\A[^/]*\.gemspec\z},
       godeps_json: 'Godeps.json',
       package_json: 'package.json',
       podfile: 'Podfile',
-      podspec_json: /\A[^\/]*\.podspec\.json\z/,
-      podspec: /\A[^\/]*\.podspec\z/,
-      requirements_txt: /\A[^\/]*requirements\.txt\z/,
+      podspec_json: %r{\A[^/]*\.podspec\.json\z},
+      podspec: %r{\A[^/]*\.podspec\z},
+      requirements_txt: %r{\A[^/]*requirements\.txt\z},
       yarn_lock: 'yarn.lock'
     }.freeze
 

lib/gitlab/git.rb

@@ -11,7 +11,7 @@ module Gitlab
       include Gitlab::EncodingHelper
 
       def ref_name(ref)
-        encode!(ref).sub(/\Arefs\/(tags|heads|remotes)\//, '')
+        encode!(ref).sub(%r{\Arefs/(tags|heads|remotes)/}, '')
       end
 
       def branch_name(ref)

lib/gitlab/git/blob.rb

@@ -107,7 +107,7 @@ module Gitlab
         def find_entry_by_path(repository, root_id, path)
           root_tree = repository.lookup(root_id)
           # Strip leading slashes
-          path[/^\/*/] = ''
+          path[%r{^/*}] = ''
           path_arr = path.split('/')
 
           entry = root_tree.find do |entry|
@@ -140,7 +140,7 @@ module Gitlab
         def find_by_gitaly(repository, sha, path, limit: MAX_DATA_DISPLAY_SIZE)
           return unless path
 
-          path = path.sub(/\A\/*/, '')
+          path = path.sub(%r{\A/*}, '')
           path = '/' if path.empty?
           name = File.basename(path)
 

lib/gitlab/git/path_helper.rb

@@ -6,7 +6,7 @@ module Gitlab
       class << self
         def normalize_path(filename)
           # Strip all leading slashes so that //foo -> foo
-          filename[/^\/*/] = ''
+          filename[%r{^/*}] = ''
 
           # Expand relative paths (e.g. foo/../bar)
           filename = Pathname.new(filename)

lib/gitlab/git/ref.rb

@@ -23,7 +23,7 @@ module Gitlab
       # Ex.
       #   Ref.extract_branch_name('refs/heads/master') #=> 'master'
       def self.extract_branch_name(str)
-        str.gsub(/\Arefs\/heads\//, '')
+        str.gsub(%r{\Arefs/heads/}, '')
       end
 
       # Gitaly: this method will probably be migrated indirectly via its call sites.

lib/gitlab/git/repository.rb

@@ -462,7 +462,6 @@ module Gitlab
           path: nil,
           follow: false,
           skip_merges: false,
-          disable_walk: false,
           after: nil,
           before: nil
         }
@@ -494,11 +493,7 @@ module Gitlab
           return []
         end
 
-        if log_using_shell?(options)
         log_by_shell(sha, options)
-        else
-          log_by_walk(sha, options)
-        end
       end
 
       def count_commits(options)
@@ -1386,8 +1381,18 @@ module Gitlab
         run_git(args).first.scrub.split(/^--$/)
       end
 
+      def can_be_merged?(source_sha, target_branch)
+        gitaly_migrate(:can_be_merged) do |is_enabled|
+          if is_enabled
+            gitaly_can_be_merged?(source_sha, find_branch(target_branch, true).target)
+          else
+            rugged_can_be_merged?(source_sha, target_branch)
+          end
+        end
+      end
+
       def search_files_by_name(query, ref)
-        safe_query = Regexp.escape(query.sub(/^\/*/, ""))
+        safe_query = Regexp.escape(query.sub(%r{^/*}, ""))
 
         return [] if empty? || safe_query.blank?
 
@@ -1635,24 +1640,6 @@ module Gitlab
         end
       end
 
-      def log_using_shell?(options)
-        options[:path].present? ||
-          options[:disable_walk] ||
-          options[:skip_merges] ||
-          options[:after] ||
-          options[:before]
-      end
-
-      def log_by_walk(sha, options)
-        walk_options = {
-          show: sha,
-          sort: Rugged::SORT_NONE,
-          limit: options[:limit],
-          offset: options[:offset]
-        }
-        Rugged::Walker.walk(rugged, walk_options).to_a
-      end
-
       # Gitaly note: JV: although #log_by_shell shells out to Git I think the
       # complexity is such that we should migrate it as Ruby before trying to
       # do it in Go.
@@ -2015,7 +2002,7 @@ module Gitlab
         target_commit = Gitlab::Git::Commit.find(self, rugged_ref.target)
         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("Branch #{ref} already exists") if e.to_s =~ %r{'refs/heads/#{ref}'}
 
         raise InvalidRef.new("Invalid reference #{start_point}")
       end
@@ -2280,6 +2267,14 @@ module Gitlab
         run_git(['fetch', remote_name], env: env).last.zero?
       end
 
+      def gitaly_can_be_merged?(their_commit, our_commit)
+        !gitaly_conflicts_client(our_commit, their_commit).conflicts?
+      end
+
+      def rugged_can_be_merged?(their_commit, our_commit)
+        !rugged.merge_commits(our_commit, their_commit).conflicts?
+      end
+
       def gitlab_projects_error
         raise CommandError, @gitlab_projects.output
       end

lib/gitlab/git/repository_mirroring.rb

@@ -43,7 +43,7 @@ module Gitlab
         branches = []
 
         rugged.references.each("refs/remotes/#{remote_name}/*").map do |ref|
-          name = ref.name.sub(/\Arefs\/remotes\/#{remote_name}\//, '')
+          name = ref.name.sub(%r{\Arefs/remotes/#{remote_name}/}, '')
 
           begin
             target_commit = Gitlab::Git::Commit.find(self, ref.target)

lib/gitlab/git/tree.rb

@@ -83,6 +83,8 @@ module Gitlab
               commit_id: sha
             )
           end
+        rescue Rugged::ReferenceError
+          []
         end
       end
 

lib/gitlab/gitaly_client/commit_service.rb

@@ -257,7 +257,7 @@ module Gitlab
           offset:       options[:offset],
           follow:       options[:follow],
           skip_merges:  options[:skip_merges],
-          disable_walk: options[:disable_walk]
+          disable_walk: true # This option is deprecated. The 'walk' implementation is being removed.
         )
         request.after    = GitalyClient.timestamp(options[:after]) if options[:after]
         request.before   = GitalyClient.timestamp(options[:before]) if options[:before]

lib/gitlab/gitaly_client/server_service.rb

+module Gitlab
+  module GitalyClient
+    # Meant for extraction of server data, and later maybe to perform misc task
+    #
+    # Not meant for connection logic, look in Gitlab::GitalyClient
+    class ServerService
+      def initialize(storage)
+        @storage = storage
+      end
+
+      def info
+        GitalyClient.call(@storage, :server_service, :server_info, Gitaly::ServerInfoRequest.new)
+      end
+    end
+  end
+end

lib/gitlab/github_import/representation/diff_note.rb

@@ -13,7 +13,7 @@ module Gitlab
                          :diff_hunk, :author, :note, :created_at, :updated_at,
                          :github_id
 
-        NOTEABLE_ID_REGEX = /\/pull\/(?<iid>\d+)/i
+        NOTEABLE_ID_REGEX = %r{/pull/(?<iid>\d+)}i
 
         # Builds a diff note from a GitHub API response.
         #

lib/gitlab/github_import/representation/note.rb

@@ -12,7 +12,7 @@ module Gitlab
         expose_attribute :noteable_id, :noteable_type, :author, :note,
                          :created_at, :updated_at, :github_id
 
-        NOTEABLE_TYPE_REGEX = /\/(?<type>(pull|issues))\/(?<iid>\d+)/i
+        NOTEABLE_TYPE_REGEX = %r{/(?<type>(pull|issues))/(?<iid>\d+)}i
 
         # Builds a note from a GitHub API response.
         #

lib/gitlab/import_export/file_importer.rb

@@ -59,7 +59,7 @@ module Gitlab
       end
 
       def extracted_files
-        Dir.glob("#{@shared.export_path}/**/*", File::FNM_DOTMATCH).reject { |f| f =~ /.*\/\.{1,2}$/ }
+        Dir.glob("#{@shared.export_path}/**/*", File::FNM_DOTMATCH).reject { |f| f =~ %r{.*/\.{1,2}$} }
       end
     end
   end

lib/gitlab/metrics/subscribers/action_view.rb

@@ -34,7 +34,7 @@ module Gitlab
         end
 
         def relative_path(path)
-          path.gsub(/^#{Rails.root.to_s}\/?/, '')
+          path.gsub(%r{^#{Rails.root.to_s}/?}, '')
         end
 
         def values_for(event)

lib/gitlab/middleware/go.rb

@@ -56,12 +56,12 @@ module Gitlab
       end
 
       def strip_url(url)
-        url.gsub(/\Ahttps?:\/\//, '')
+        url.gsub(%r{\Ahttps?://}, '')
       end
 
       def project_path(request)
         path_info = request.env["PATH_INFO"]
-        path_info.sub!(/^\//, '')
+        path_info.sub!(%r{^/}, '')
 
         project_path_match = "#{path_info}/".match(PROJECT_PATH_REGEX)
         return unless project_path_match

lib/gitlab/middleware/static.rb

 module Gitlab
   module Middleware
     class Static < ActionDispatch::Static
-      UPLOADS_REGEX = /\A\/uploads(\/|\z)/.freeze
+      UPLOADS_REGEX = %r{\A/uploads(/|\z)}.freeze
 
       def call(env)
         return @app.call(env) if env['PATH_INFO'] =~ UPLOADS_REGEX

lib/gitlab/quick_actions/spend_time_and_date_separator.rb

@@ -9,7 +9,7 @@ module Gitlab
     # if date doesn't present return time with current date
     # in other cases return nil
     class SpendTimeAndDateSeparator
-      DATE_REGEX = /(\d{2,4}[\/\-.]\d{1,2}[\/\-.]\d{1,2})/
+      DATE_REGEX = %r{(\d{2,4}[/\-.]\d{1,2}[/\-.]\d{1,2})}
 
       def initialize(spend_command_arg)
         @spend_arg = spend_command_arg

lib/gitlab/repo_path.rb

@@ -30,7 +30,7 @@ module Gitlab
         raise NotFoundError.new("No known storage path matches #{repo_path.inspect}")
       end
 
-      result.sub(/\A\/*/, '')
+      result.sub(%r{\A/*}, '')
     end
 
     def self.find_project(project_path)

lib/gitlab/setup_helper.rb

@@ -31,7 +31,7 @@ module Gitlab
           storages << { name: 'test_second_storage', path: Rails.root.join('tmp', 'tests', 'second_storage').to_s }
         end
 
-        config = { socket_path: address.sub(%r{\Aunix:}, ''), storage: storages }
+        config = { socket_path: address.sub(/\Aunix:/, ''), storage: storages }
         config[:auth] = { token: 'secret' } if Rails.env.test?
         config[:'gitaly-ruby'] = { dir: File.join(gitaly_dir, 'ruby') } if gitaly_ruby
         config[:'gitlab-shell'] = { dir: Gitlab.config.gitlab_shell.path }