Merge branch 'master' into 31053-pipeline-ux31053-pipeline-ux

* master:
  Fallback to default pattern when note does not belong to project
  Merge request widget redesign
  Fixed focused test in notes spec
  Fixed UP arrow key not editing last comment in discussion
  Fix skipped manual actions issue in pipeline processing
  Fix notify_only_default_branch check for Slack service

53 files changed, 2523 insertions, 162 deletions

diff --git a/app/assets/javascripts/diff_notes/components/resolve_btn.js b/app/assets/javascripts/diff_notes/components/resolve_btn.js
index 92f6fd654b3..9d51fb53eb2 100644
--- a/app/assets/javascripts/diff_notes/components/resolve_btn.js
+++ b/app/assets/javascripts/diff_notes/components/resolve_btn.js
@@ -88,6 +88,7 @@ const ResolveBtn = Vue.extend({
 
           CommentsStore.update(this.discussionId, this.noteId, !this.isResolved, resolved_by);
           this.discussion.updateHeadline(data);
+          gl.mrWidget.checkStatus();
         } else {
           new Flash(errorFlashMsg);
         }
diff --git a/app/assets/javascripts/diff_notes/services/resolve.js b/app/assets/javascripts/diff_notes/services/resolve.js
index 4ea6ba8a73d..ba4f6d36fcb 100644
--- a/app/assets/javascripts/diff_notes/services/resolve.js
+++ b/app/assets/javascripts/diff_notes/services/resolve.js
@@ -49,6 +49,7 @@ class ResolveServiceClass {
           discussion.resolveAllNotes(resolved_by);
         }
 
+        gl.mrWidget.checkStatus();
         discussion.updateHeadline(data);
       } else {
         throw new Error('An error occurred when trying to resolve discussion.');
diff --git a/app/assets/javascripts/dispatcher.js b/app/assets/javascripts/dispatcher.js
index bf802056d36..abb871c3af0 100644
--- a/app/assets/javascripts/dispatcher.js
+++ b/app/assets/javascripts/dispatcher.js
@@ -10,7 +10,6 @@
 /* global IssuableForm */
 /* global LabelsSelect */
 /* global MilestoneSelect */
-/* global MergedButtons */
 /* global Commit */
 /* global NotificationsForm */
 /* global TreeView */
@@ -216,15 +215,10 @@ const ShortcutsBlob = require('./shortcuts_blob');
           new gl.Diff();
           shortcut_handler = new ShortcutsIssuable(true);
           new ZenMode();
-          new MergedButtons();
-          break;
-        case 'projects:merge_requests:commits':
-          new MergedButtons();
           break;
         case "projects:merge_requests:diffs":
           new gl.Diff();
           new ZenMode();
-          new MergedButtons();
           break;
         case 'dashboard:activity':
           new gl.Activities();
diff --git a/app/assets/javascripts/lib/utils/simple_poll.js b/app/assets/javascripts/lib/utils/simple_poll.js
new file mode 100644
index 00000000000..25ca98afbe7
--- /dev/null
+++ b/app/assets/javascripts/lib/utils/simple_poll.js
@@ -0,0 +1,15 @@
+export default (fn, interval = 2000, timeout = 60000) => {
+  const startTime = Date.now();
+
+  return new Promise((resolve, reject) => {
+    const stop = arg => ((arg instanceof Error) ? reject(arg) : resolve(arg));
+    const next = () => {
+      if (Date.now() - startTime < timeout) {
+        setTimeout(fn.bind(null, next, stop), interval);
+      } else {
+        reject(new Error('SIMPLE_POLL_TIMEOUT'));
+      }
+    };
+    fn(next, stop);
+  });
+};
diff --git a/app/assets/javascripts/main.js b/app/assets/javascripts/main.js
index 1b0d5fc92e3..a07aa047293 100644
--- a/app/assets/javascripts/main.js
+++ b/app/assets/javascripts/main.js
@@ -123,8 +123,6 @@ import './member_expiration_date';
 import './members';
 import './merge_request';
 import './merge_request_tabs';
-import './merge_request_widget';
-import './merged_buttons';
 import './milestone';
 import './milestone_select';
 import './mini_pipeline_graph_dropdown';
diff --git a/app/assets/javascripts/merge_request.js b/app/assets/javascripts/merge_request.js
index 5e01aacf2ba..ed342b9990f 100644
--- a/app/assets/javascripts/merge_request.js
+++ b/app/assets/javascripts/merge_request.js
@@ -106,6 +106,21 @@ require('./merge_request_tabs');
       });
     };
 
+    MergeRequest.prototype.updateStatusText = function(classToRemove, classToAdd, newStatusText) {
+      $('.detail-page-header .status-box')
+        .removeClass(classToRemove)
+        .addClass(classToAdd)
+        .find('span')
+        .text(newStatusText);
+    };
+
+    MergeRequest.prototype.decreaseCounter = function(by = 1) {
+      const $el = $('.nav-links .js-merge-counter');
+      const count = Math.max((parseInt($el.text().replace(/[^\d]/, ''), 10) - by), 0);
+
+      $el.text(gl.text.addDelimiter(count));
+    };
+
     return MergeRequest;
   })();
 }).call(window);
diff --git a/app/assets/javascripts/merge_request_widget/ci_bundle.js b/app/assets/javascripts/merge_request_widget/ci_bundle.js
deleted file mode 100644
index 21d7c3e168e..00000000000
--- a/app/assets/javascripts/merge_request_widget/ci_bundle.js
+++ /dev/null
@@ -1,53 +0,0 @@
-/* global merge_request_widget */
-
-(() => {
-  $(() => {
-    /* TODO: This needs a better home, or should be refactored. It was previously contained
-     * in a script tag in app/views/projects/merge_requests/widget/open/_accept.html.haml,
-     * but Vue chokes on script tags and prevents their execution. So it was moved here
-     * temporarily.
-     * */
-
-    $(document)
-    .off('ajax:send', '.accept-mr-form')
-    .on('ajax:send', '.accept-mr-form', () => {
-      $('.accept-mr-form :input').disable();
-    });
-
-    $(document)
-    .off('click', '.accept-merge-request')
-    .on('click', '.accept-merge-request', () => {
-      $('.js-merge-button, .js-merge-when-pipeline-succeeds-button').html('<i class="fa fa-spinner fa-spin"></i> Merge in progress');
-    });
-
-    $(document)
-    .off('click', '.merge-when-pipeline-succeeds')
-    .on('click', '.merge-when-pipeline-succeeds', () => {
-      $('#merge_when_pipeline_succeeds').val('1');
-    });
-
-    $(document)
-    .off('click', '.js-merge-dropdown a')
-    .on('click', '.js-merge-dropdown a', (e) => {
-      e.preventDefault();
-      $(e.target).closest('form').submit();
-    });
-    if ($('.rebase-in-progress').length) {
-      merge_request_widget.rebaseInProgress();
-    } else if ($('.rebase-mr-form').length) {
-      $(document)
-      .off('ajax:send', '.rebase-mr-form')
-      .on('ajax:send', '.rebase-mr-form', () => {
-        $('.rebase-mr-form :input').disable();
-      });
-
-      $(document)
-      .off('click', '.js-rebase-button')
-      .on('click', '.js-rebase-button', () => {
-        $('.js-rebase-button').html("<i class='fa fa-spinner fa-spin'></i> Rebase in progress");
-      });
-    } else {
-      setTimeout(() => merge_request_widget.getMergeStatus(), 200);
-    }
-  });
-})();
diff --git a/app/assets/javascripts/merged_buttons.js b/app/assets/javascripts/merged_buttons.js
deleted file mode 100644
index 7b0997c6520..00000000000
--- a/app/assets/javascripts/merged_buttons.js
+++ /dev/null
@@ -1,47 +0,0 @@
-/* eslint-disable func-names, space-before-function-paren, no-var, prefer-rest-params, wrap-iife, max-len */
-
-import '~/lib/utils/url_utility';
-
-(function() {
-  this.MergedButtons = (function() {
-    function MergedButtons() {
-      this.removeSourceBranch = this.removeSourceBranch.bind(this);
-      this.removeBranchSuccess = this.removeBranchSuccess.bind(this);
-      this.removeBranchError = this.removeBranchError.bind(this);
-      this.$removeBranchWidget = $('.remove_source_branch_widget');
-      this.$removeBranchProgress = $('.remove_source_branch_in_progress');
-      this.$removeBranchFailed = $('.remove_source_branch_widget.failed');
-      this.cleanEventListeners();
-      this.initEventListeners();
-    }
-
-    MergedButtons.prototype.cleanEventListeners = function() {
-      $(document).off('click', '.remove_source_branch');
-      $(document).off('ajax:success', '.remove_source_branch');
-      return $(document).off('ajax:error', '.remove_source_branch');
-    };
-
-    MergedButtons.prototype.initEventListeners = function() {
-      $(document).on('click', '.remove_source_branch', this.removeSourceBranch);
-      $(document).on('ajax:success', '.remove_source_branch', this.removeBranchSuccess);
-      $(document).on('ajax:error', '.remove_source_branch', this.removeBranchError);
-    };
-
-    MergedButtons.prototype.removeSourceBranch = function() {
-      this.$removeBranchWidget.hide();
-      return this.$removeBranchProgress.show();
-    };
-
-    MergedButtons.prototype.removeBranchSuccess = function() {
-      gl.utils.refreshCurrentPage();
-    };
-
-    MergedButtons.prototype.removeBranchError = function() {
-      this.$removeBranchWidget.hide();
-      this.$removeBranchProgress.hide();
-      return this.$removeBranchFailed.show();
-    };
-
-    return MergedButtons;
-  })();
-}).call(window);
diff --git a/app/assets/javascripts/notes.js b/app/assets/javascripts/notes.js
index 55391ebc089..194c29f4710 100644
--- a/app/assets/javascripts/notes.js
+++ b/app/assets/javascripts/notes.js
@@ -175,7 +175,7 @@ const normalizeNewlines = function(str) {
           if ($textarea.val() !== '') {
             return;
           }
-          myLastNote = $("li.note[data-author-id='" + gon.current_user_id + "'][data-editable]:last");
+          myLastNote = $(`li.note[data-author-id='${gon.current_user_id}'][data-editable]:last`, $textarea.closest('.note, #notes'));
           if (myLastNote.length) {
             myLastNoteEditBtn = myLastNote.find('.js-note-edit');
             return myLastNoteEditBtn.trigger('click', [true, myLastNote]);
@@ -276,7 +276,7 @@ const normalizeNewlines = function(str) {
       var votesBlock;
       if (noteEntity.commands_changes) {
         if ('merge' in noteEntity.commands_changes) {
-          $.get(mrRefreshWidgetUrl);
+          Notes.checkMergeRequestStatus();
         }
 
         if ('emoji_award' in noteEntity.commands_changes) {
@@ -424,6 +424,7 @@ const normalizeNewlines = function(str) {
       }
 
       gl.utils.localTimeAgo($('.js-timeago'), false);
+      Notes.checkMergeRequestStatus();
       return this.updateNotesCount(1);
     };
 
@@ -769,7 +770,8 @@ const normalizeNewlines = function(str) {
           }
         };
       })(this));
-      // Decrement the "Discussions" counter only once
+
+      Notes.checkMergeRequestStatus();
       return this.updateNotesCount(-1);
     };
 
@@ -1115,6 +1117,12 @@ const normalizeNewlines = function(str) {
       return $form;
     };
 
+    Notes.checkMergeRequestStatus = function() {
+      if (gl.utils.getPagePath(1) === 'merge_requests') {
+        gl.mrWidget.checkStatus();
+      }
+    };
+
     Notes.animateAppendNote = function(noteHtml, $notesList) {
       const $note = $(noteHtml);
 
diff --git a/app/assets/javascripts/pipelines/components/stage.js b/app/assets/javascripts/pipelines/components/stage.js
new file mode 100644
index 00000000000..034e8d3280e
--- /dev/null
+++ b/app/assets/javascripts/pipelines/components/stage.js
@@ -0,0 +1,104 @@
+/* global Flash */
+import { borderlessStatusIconEntityMap } from '../../vue_shared/ci_status_icons';
+
+export default {
+  data() {
+    return {
+      builds: '',
+      spinner: '<span class="fa fa-spinner fa-spin"></span>',
+    };
+  },
+
+  props: {
+    stage: {
+      type: Object,
+      required: true,
+    },
+  },
+
+  updated() {
+    if (this.builds) {
+      this.stopDropdownClickPropagation();
+    }
+  },
+
+  methods: {
+    fetchBuilds(e) {
+      const ariaExpanded = e.currentTarget.attributes['aria-expanded'];
+
+      if (ariaExpanded && (ariaExpanded.textContent === 'true')) return null;
+
+      return this.$http.get(this.stage.dropdown_path)
+        .then((response) => {
+          this.builds = JSON.parse(response.body).html;
+        }, () => {
+          const flash = new Flash('Something went wrong on our end.');
+          return flash;
+        });
+    },
+
+    /**
+     * When the user right clicks or cmd/ctrl + click in the job name
+     * the dropdown should not be closed and the link should open in another tab,
+     * so we stop propagation of the click event inside the dropdown.
+     *
+     * Since this component is rendered multiple times per page we need to guarantee we only
+     * target the click event of this component.
+     */
+    stopDropdownClickPropagation() {
+      $(this.$el.querySelectorAll('.js-builds-dropdown-list a.mini-pipeline-graph-dropdown-item')).on('click', (e) => {
+        e.stopPropagation();
+      });
+    },
+  },
+  computed: {
+    buildsOrSpinner() {
+      return this.builds ? this.builds : this.spinner;
+    },
+    dropdownClass() {
+      if (this.builds) return 'js-builds-dropdown-container';
+      return 'js-builds-dropdown-loading builds-dropdown-loading';
+    },
+    buildStatus() {
+      return `Build: ${this.stage.status.label}`;
+    },
+    tooltip() {
+      return `has-tooltip ci-status-icon ci-status-icon-${this.stage.status.group}`;
+    },
+    triggerButtonClass() {
+      return `mini-pipeline-graph-dropdown-toggle has-tooltip js-builds-dropdown-button ci-status-icon-${this.stage.status.group}`;
+    },
+    svgHTML() {
+      return borderlessStatusIconEntityMap[this.stage.status.icon];
+    },
+  },
+  watch: {
+    'stage.title': function stageTitle() {
+      $(this.$refs.button).tooltip('destroy').tooltip();
+    },
+  },
+  template: `
+    <div>
+      <button
+        @click="fetchBuilds($event)"
+        :class="triggerButtonClass"
+        :title="stage.title"
+        data-placement="top"
+        data-toggle="dropdown"
+        type="button"
+        ref="button"
+        :aria-label="stage.title">
+        <span v-html="svgHTML" aria-hidden="true"></span>
+        <i class="fa fa-caret-down" aria-hidden="true"></i>
+      </button>
+      <ul class="dropdown-menu mini-pipeline-graph-dropdown-menu js-builds-dropdown-container">
+        <div class="arrow-up" aria-hidden="true"></div>
+        <div
+          :class="dropdownClass"
+          class="js-builds-dropdown-list scrollable-menu"
+          v-html="buildsOrSpinner">
+        </div>
+      </ul>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author.js
new file mode 100644
index 00000000000..a01cb8cc202
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author.js
@@ -0,0 +1,23 @@
+export default {
+  name: 'MRWidgetAuthor',
+  props: {
+    author: { type: Object, required: true },
+    showAuthorName: { type: Boolean, required: false, default: true },
+    showAuthorTooltip: { type: Boolean, required: false, default: false },
+  },
+  template: `
+    <a
+      :href="author.webUrl || author.web_url"
+      class="author-link"
+      :class="{ 'has-tooltip': showAuthorTooltip }"
+      :title="author.name">
+      <img
+        :src="author.avatarUrl || author.avatar_url"
+        class="avatar avatar-inline s16" />
+      <span
+        v-if="showAuthorName"
+        class="author">{{author.name}}
+      </span>
+    </a>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author_time.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author_time.js
new file mode 100644
index 00000000000..6d2ed5fda64
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_author_time.js
@@ -0,0 +1,27 @@
+import MRWidgetAuthor from './mr_widget_author';
+
+export default {
+  name: 'MRWidgetAuthorTime',
+  props: {
+    actionText: { type: String, required: true },
+    author: { type: Object, required: true },
+    dateTitle: { type: String, required: true },
+    dateReadable: { type: String, required: true },
+  },
+  components: {
+    'mr-widget-author': MRWidgetAuthor,
+  },
+  template: `
+    <h4 class="js-mr-widget-author">
+      {{actionText}}
+      <mr-widget-author :author="author" />
+      <time
+        :title="dateTitle"
+        data-toggle="tooltip"
+        data-placement="top"
+        data-container="body">
+        {{dateReadable}}
+      </time>
+    </h4>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_deployment.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_deployment.js
new file mode 100644
index 00000000000..630e80a7408
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_deployment.js
@@ -0,0 +1,118 @@
+/* global Flash */
+
+import '~/lib/utils/datetime_utility';
+import { statusClassToSvgMap } from '../../vue_shared/pipeline_svg_icons';
+import MemoryUsage from './mr_widget_memory_usage';
+import MRWidgetService from '../services/mr_widget_service';
+
+export default {
+  name: 'MRWidgetDeployment',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-memory-usage': MemoryUsage,
+  },
+  computed: {
+    svg() {
+      return statusClassToSvgMap.icon_status_success;
+    },
+  },
+  methods: {
+    formatDate(date) {
+      return gl.utils.getTimeago().format(date);
+    },
+    hasExternalUrls(deployment = {}) {
+      return deployment.external_url && deployment.external_url_formatted;
+    },
+    hasDeploymentTime(deployment = {}) {
+      return deployment.deployed_at && deployment.deployed_at_formatted;
+    },
+    hasDeploymentMeta(deployment = {}) {
+      return deployment.url && deployment.name;
+    },
+    stopEnvironment(deployment) {
+      const msg = 'Are you sure you want to stop this environment?';
+      const isConfirmed = confirm(msg); // eslint-disable-line
+
+      if (isConfirmed) {
+        MRWidgetService.stopEnvironment(deployment.stop_url)
+          .then(res => res.json())
+          .then((res) => {
+            if (res.redirect_url) {
+              gl.utils.visitUrl(res.redirect_url);
+            }
+          })
+          .catch(() => {
+            new Flash('Something went wrong while stopping this environment. Please try again.'); // eslint-disable-line
+          });
+      }
+    },
+  },
+  template: `
+    <div class="mr-widget-heading">
+      <div v-for="deployment in mr.deployments">
+        <div class="ci-widget">
+          <div class="ci-status-icon ci-status-icon-success">
+            <span class="js-icon-link icon-link">
+              <span
+                v-html="svg"
+                aria-hidden="true"></span>
+            </span>
+          </div>
+          <span>
+            <span
+              v-if="hasDeploymentMeta(deployment)">
+              Deployed to
+            </span>
+            <a
+              v-if="hasDeploymentMeta(deployment)"
+              :href="deployment.url"
+              target="_blank"
+              rel="noopener noreferrer nofollow"
+              class="js-deploy-meta">
+              {{deployment.name}}
+            </a>
+            <span
+              v-if="hasExternalUrls(deployment)">
+              on
+            </span>
+            <a
+              v-if="hasExternalUrls(deployment)"
+              :href="deployment.external_url"
+              target="_blank"
+              rel="noopener noreferrer nofollow"
+              class="js-deploy-url">
+              <i
+                class="fa fa-external-link"
+                aria-hidden="true" />
+              {{deployment.external_url_formatted}}
+            </a>
+            <span
+              v-if="hasDeploymentTime(deployment)"
+              :data-title="deployment.deployed_at_formatted"
+              class="js-deploy-time"
+              data-toggle="tooltip"
+              data-placement="top">
+              {{formatDate(deployment.deployed_at)}}
+            </span>
+            <button
+              type="button"
+              v-if="deployment.stop_url"
+              @click="stopEnvironment(deployment)"
+              class="btn btn-default btn-xs">
+              Stop environment
+            </button>
+          </span>
+        </div>
+        <mr-widget-memory-usage
+          v-if="deployment.metrics_url"
+          :mr="mr"
+          :service="service"
+          :metricsUrl="deployment.metrics_url"
+        />
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.js
new file mode 100644
index 00000000000..4a1fd881169
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_header.js
@@ -0,0 +1,98 @@
+require('../../lib/utils/text_utility');
+
+export default {
+  name: 'MRWidgetHeader',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  computed: {
+    shouldShowCommitsBehindText() {
+      return this.mr.divergedCommitsCount > 0;
+    },
+    commitsText() {
+      return gl.text.pluralize('commit', this.mr.divergedCommitsCount);
+    },
+  },
+  methods: {
+    isBranchTitleLong(branchTitle) {
+      return branchTitle.length > 32;
+    },
+  },
+  template: `
+    <div class="mr-source-target">
+      <div
+        v-if="mr.isOpen"
+        class="pull-right">
+        <a
+          href="#modal_merge_info"
+          data-toggle="modal"
+          class="btn inline btn-grouped btn-sm">
+          Check out branch
+        </a>
+        <span class="dropdown inline prepend-left-5">
+          <a
+            class="btn btn-sm dropdown-toggle"
+            data-toggle="dropdown"
+            aria-label="Download as"
+            role="button">
+            <i
+              class="fa fa-download"
+              aria-hidden="true" />
+            <i
+              class="fa fa-caret-down"
+              aria-hidden="true" />
+          </a>
+          <ul class="dropdown-menu dropdown-menu-align-right">
+            <li>
+              <a
+                :href="mr.emailPatchesPath"
+                download>
+                Email patches
+              </a>
+            </li>
+            <li>
+              <a
+                :href="mr.plainDiffPath"
+                download>
+                Plain diff
+              </a>
+            </li>
+          </ul>
+        </span>
+      </div>
+      <div class="normal">
+        <b>Request to merge</b>
+        <span
+          class="label-branch"
+          :class="{'label-truncated has-tooltip': isBranchTitleLong(mr.sourceBranch)}"
+          :title="isBranchTitleLong(mr.sourceBranch) ? mr.sourceBranch : ''"
+          data-placement="bottom"
+          v-html="mr.sourceBranchLink"></span>
+        <button
+          class="btn btn-transparent btn-clipboard has-tooltip"
+          data-title="Copy branch name to clipboard"
+          :data-clipboard-text="mr.sourceBranch">
+          <i
+            aria-hidden="true"
+            class="fa fa-clipboard"></i>
+        </button>
+        <b>into</b>
+        <span
+          class="label-branch"
+          :class="{'label-truncated has-tooltip': isBranchTitleLong(mr.targetBranch)}"
+          :title="isBranchTitleLong(mr.targetBranch) ? mr.targetBranch : ''"
+          data-placement="bottom">
+          <a
+            :href="mr.targetBranchCommitsPath">
+            {{mr.targetBranch}}
+          </a>
+        </span>
+        <span
+          v-if="shouldShowCommitsBehindText"
+          class="diverged-commits-count">
+          ({{mr.divergedCommitsCount}} {{commitsText}} behind)
+        </span>
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js
new file mode 100644
index 00000000000..395cc9e91fc
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js
@@ -0,0 +1,109 @@
+import statusCodes from '~/lib/utils/http_status';
+import MemoryGraph from '../../vue_shared/components/memory_graph';
+import MRWidgetService from '../services/mr_widget_service';
+
+export default {
+  name: 'MemoryUsage',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+    metricsUrl: { type: String, required: true },
+  },
+  data() {
+    return {
+      // memoryFrom: 0,
+      // memoryTo: 0,
+      memoryMetrics: [],
+      hasMetrics: false,
+      loadFailed: false,
+      loadingMetrics: true,
+      backOffRequestCounter: 0,
+    };
+  },
+  components: {
+    'mr-memory-graph': MemoryGraph,
+  },
+  methods: {
+    computeGraphData(metrics) {
+      this.loadingMetrics = false;
+      const { memory_values } = metrics;
+      // if (memory_previous.length > 0) {
+      //   this.memoryFrom = Number(memory_previous[0].value[1]).toFixed(2);
+      // }
+      //
+      // if (memory_current.length > 0) {
+      //   this.memoryTo = Number(memory_current[0].value[1]).toFixed(2);
+      // }
+
+      if (memory_values.length > 0) {
+        this.hasMetrics = true;
+        this.memoryMetrics = memory_values[0].values;
+      }
+    },
+  },
+  mounted() {
+    this.$props.loadingMetrics = true;
+    gl.utils.backOff((next, stop) => {
+      MRWidgetService.fetchMetrics(this.$props.metricsUrl)
+        .then((res) => {
+          if (res.status === statusCodes.NO_CONTENT) {
+            this.backOffRequestCounter = this.backOffRequestCounter += 1;
+            if (this.backOffRequestCounter < 3) {
+              next();
+            } else {
+              stop(res);
+            }
+          } else {
+            stop(res);
+          }
+        })
+        .catch(stop);
+    })
+    .then((res) => {
+      if (res.status === statusCodes.NO_CONTENT) {
+        return res;
+      }
+
+      return res.json();
+    })
+    .then((res) => {
+      this.computeGraphData(res.metrics);
+      return res;
+    })
+    .catch(() => {
+      this.$props.loadFailed = true;
+    });
+  },
+  template: `
+    <div class="mr-info-list mr-memory-usage">
+      <div class="legend"></div>
+      <p
+        v-if="loadingMetrics"
+        class="usage-info usage-info-loading">
+        <i
+          class="fa fa-spinner fa-spin usage-info-load-spinner"
+          aria-hidden="true" />Loading deployment statistics.
+      </p>
+      <p
+        v-if="!hasMetrics && !loadingMetrics"
+        class="usage-info usage-info-loading">
+        Deployment statistics are not available currently.
+      </p>
+      <p
+        v-if="hasMetrics"
+        class="usage-info">
+        Deployment memory usage:
+      </p>
+      <p
+        v-if="loadFailed"
+        class="usage-info">
+        Failed to load deployment statistics.
+      </p>
+      <mr-memory-graph
+        v-if="hasMetrics"
+        :metrics="memoryMetrics"
+        height="25"
+        width="100" />
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_merge_help.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_merge_help.js
new file mode 100644
index 00000000000..2fecebce7a0
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_merge_help.js
@@ -0,0 +1,23 @@
+export default {
+  name: 'MRWidgetMergeHelp',
+  props: {
+    missingBranch: { type: String, required: false, default: '' },
+  },
+  template: `
+    <section class="mr-widget-help">
+      <template
+        v-if="missingBranch">
+        If the {{missingBranch}} branch exists in your local repository, you
+      </template>
+      <template v-else>
+        You
+      </template>
+      can merge this merge request manually using the
+      <a
+        data-toggle="modal"
+        href="#modal_merge_info">
+        command line.
+      </a>
+    </section>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.js
new file mode 100644
index 00000000000..801b9fb1ba1
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline.js
@@ -0,0 +1,76 @@
+import PipelineStage from '../../pipelines/components/stage';
+import pipelineStatusIcon from '../../vue_shared/components/pipeline_status_icon';
+import { statusClassToSvgMap } from '../../vue_shared/pipeline_svg_icons';
+
+export default {
+  name: 'MRWidgetPipeline',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  components: {
+    'pipeline-stage': PipelineStage,
+    'pipeline-status-icon': pipelineStatusIcon,
+  },
+  computed: {
+    hasCIError() {
+      const { hasCI, ciStatus } = this.mr;
+
+      return hasCI && !ciStatus;
+    },
+    svg() {
+      return statusClassToSvgMap.icon_status_failed;
+    },
+    stageText() {
+      return this.mr.pipeline.details.stages.length > 1 ? 'stages' : 'stage';
+    },
+  },
+  template: `
+    <div class="mr-widget-heading">
+      <div class="ci-widget">
+        <template v-if="hasCIError">
+          <div class="ci-status-icon ci-status-icon-failed js-ci-error">
+            <span class="js-icon-link icon-link">
+              <span
+                v-html="svg"
+                aria-hidden="true"></span>
+            </span>
+          </div>
+          <span>Could not connect to the CI server. Please check your settings and try again.</span>
+        </template>
+        <template v-else>
+          <pipeline-status-icon :pipelineStatus="mr.pipelineDetailedStatus" />
+          <span>
+            Pipeline
+            <a
+              :href="mr.pipeline.path"
+              class="pipeline-id">#{{mr.pipeline.id}}</a>
+            {{mr.pipeline.details.status.label}}
+            with {{stageText}}
+          </span>
+          <div class="mr-widget-pipeline-graph">
+            <div class="stage-cell">
+              <div
+                v-if="mr.pipeline.details.stages.length > 0"
+                v-for="stage in mr.pipeline.details.stages"
+                class="stage-container dropdown js-mini-pipeline-graph">
+                <pipeline-stage :stage="stage" />
+              </div>
+            </div>
+          </div>
+          <span>
+            for
+            <a
+              :href="mr.pipeline.commit.commit_path"
+              class="monospace js-commit-link">
+              {{mr.pipeline.commit.short_id}}</a>.
+          </span>
+          <span
+            v-if="mr.pipeline.coverage"
+            class="js-mr-coverage">
+            Coverage {{mr.pipeline.coverage}}%.
+          </span>
+        </template>
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.js
new file mode 100644
index 00000000000..205804670fa
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_related_links.js
@@ -0,0 +1,42 @@
+export default {
+  name: 'MRWidgetRelatedLinks',
+  props: {
+    relatedLinks: { type: Object, required: true },
+  },
+  computed: {
+    hasLinks() {
+      const { closing, mentioned, assignToMe } = this.relatedLinks;
+      return closing || mentioned || assignToMe;
+    },
+  },
+  methods: {
+    hasMultipleIssues(text) {
+      return !text ? false : text.match(/<\/a> and <a/);
+    },
+    issueLabel(field) {
+      return this.hasMultipleIssues(this.relatedLinks[field]) ? 'issues' : 'issue';
+    },
+    verbLabel(field) {
+      return this.hasMultipleIssues(this.relatedLinks[field]) ? 'are' : 'is';
+    },
+  },
+  template: `
+    <section
+      v-if="hasLinks"
+      class="mr-info-list mr-links">
+      <div class="legend"></div>
+      <p v-if="relatedLinks.closing">
+        Closes {{issueLabel('closing')}}
+        <span v-html="relatedLinks.closing"></span>.
+      </p>
+      <p v-if="relatedLinks.mentioned">
+        <span class="capitalize">{{issueLabel('mentioned')}}</span>
+        <span v-html="relatedLinks.mentioned"></span>
+        {{verbLabel('mentioned')}} mentioned but will not be closed.
+      </p>
+      <p v-if="relatedLinks.assignToMe">
+        <span v-html="relatedLinks.assignToMe"></span>
+      </p>
+    </section>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_archived.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_archived.js
new file mode 100644
index 00000000000..c7f25a1697c
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_archived.js
@@ -0,0 +1,16 @@
+export default {
+  name: 'MRWidgetArchived',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        This project is archived, write access has been disabled.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_auto_merge_failed.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_auto_merge_failed.js
new file mode 100644
index 00000000000..fcccb17f58d
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_auto_merge_failed.js
@@ -0,0 +1,22 @@
+export default {
+  name: 'MRWidgetAutoMergeFailed',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        class="btn btn-success btn-small"
+        disabled="true"
+        type="button">
+        Merge
+      </button>
+      <span class="bold danger">
+        This merge request failed to be merged automatically.
+      </span>
+      <div class="merge-error-text">
+        {{mr.mergeError}}
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_checking.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_checking.js
new file mode 100644
index 00000000000..8515b54e62d
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_checking.js
@@ -0,0 +1,19 @@
+export default {
+  name: 'MRWidgetChecking',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        Checking ability to merge automatically.
+        <i
+          class="fa fa-spinner fa-spin"
+          aria-hidden="true" />
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_closed.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_closed.js
new file mode 100644
index 00000000000..7e66441e5ff
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_closed.js
@@ -0,0 +1,30 @@
+import mrWidgetAuthorTime from '../../components/mr_widget_author_time';
+
+export default {
+  name: 'MRWidgetClosed',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-author-and-time': mrWidgetAuthorTime,
+  },
+  template: `
+    <div class="mr-widget-body">
+      <mr-widget-author-and-time
+        actionText="Closed by"
+        :author="mr.closedBy"
+        :dateTitle="mr.updatedAt"
+        :dateReadable="mr.closedAt"
+      />
+      <section>
+        <p>
+          The changes were not merged into
+          <a
+            :href="mr.targetBranchCommitsPath"
+            class="label-branch">
+            {{mr.targetBranch}}</a>.
+        </p>
+      </section>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_conflicts.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_conflicts.js
new file mode 100644
index 00000000000..36596c6f37e
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_conflicts.js
@@ -0,0 +1,39 @@
+export default {
+  name: 'MRWidgetConflicts',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        There are merge conflicts.
+        <span v-if="!mr.canMerge">
+          Resolve these conflicts or ask someone with write access to this repository to merge it locally.
+        </span>
+      </span>
+      <div
+        v-if="mr.canMerge"
+        class="btn-group">
+        <a
+          v-if="mr.conflictResolutionPath"
+          :href="mr.conflictResolutionPath"
+          class="btn btn-default btn-xs js-resolve-conflicts-button">
+          Resolve conflicts
+        </a>
+        <a
+          v-if="mr.canMerge"
+          class="btn btn-default btn-xs js-merge-locally-button"
+          data-toggle="modal"
+          href="#modal_merge_info">
+          Merge locally
+        </a>
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_failed_to_merge.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_failed_to_merge.js
new file mode 100644
index 00000000000..600b4d42e3d
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_failed_to_merge.js
@@ -0,0 +1,76 @@
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetFailedToMerge',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  data() {
+    return {
+      timer: 10,
+      isRefreshing: false,
+    };
+  },
+  mounted() {
+    setInterval(() => {
+      this.updateTimer();
+    }, 1000);
+  },
+  created() {
+    eventHub.$emit('DisablePolling');
+  },
+  computed: {
+    timerText() {
+      return this.timer > 1 ? `${this.timer} seconds` : 'a second';
+    },
+  },
+  methods: {
+    refresh() {
+      this.isRefreshing = true;
+      eventHub.$emit('MRWidgetUpdateRequested');
+      eventHub.$emit('EnablePolling');
+    },
+    updateTimer() {
+      this.timer = this.timer - 1;
+
+      if (this.timer === 0) {
+        this.refresh();
+      }
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        class="btn btn-success btn-small"
+        disabled="true"
+        type="button">
+        Merge
+      </button>
+      <span
+        v-if="!isRefreshing"
+        class="bold danger">
+        <span
+          class="has-error-message"
+          v-if="mr.mergeError">
+          {{mr.mergeError}}
+        </span>
+        <span v-else>Merge failed.</span>
+        <span
+          :class="{ 'has-custom-error': mr.mergeError }">
+          Refreshing in {{timerText}} to show the updated status...
+        </span>
+        <button
+          @click="refresh"
+          class="btn btn-default btn-xs js-refresh-button"
+          type="button">
+          Refresh now
+        </button>
+      </span>
+      <span
+        v-if="isRefreshing"
+        class="bold js-refresh-label">
+        Refreshing now...
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_locked.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_locked.js
new file mode 100644
index 00000000000..e3c27dfb76d
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_locked.js
@@ -0,0 +1,24 @@
+export default {
+  name: 'MRWidgetLocked',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  template: `
+    <div class="mr-widget-body mr-state-locked">
+      <span class="state-label">Locked</span>
+      This merge request is in the process of being merged, during which time it is locked and cannot be closed.
+      <i
+        class="fa fa-spinner fa-spin"
+        aria-hidden="true" />
+      <section class="mr-info-list mr-links">
+        <div class="legend"></div>
+        <p>
+          The changes will be merged into
+          <span class="label-branch">
+            <a :href="mr.targetBranchPath">{{mr.targetBranch}}</a>
+          </span>
+        </p>
+      </section>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merge_when_pipeline_succeeds.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merge_when_pipeline_succeeds.js
new file mode 100644
index 00000000000..bcdbedcd46b
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merge_when_pipeline_succeeds.js
@@ -0,0 +1,116 @@
+/* global Flash */
+
+import MRWidgetAuthor from '../../components/mr_widget_author';
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetMergeWhenPipelineSucceeds',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-author': MRWidgetAuthor,
+  },
+  data() {
+    return {
+      isCancellingAutoMerge: false,
+      isRemovingSourceBranch: false,
+    };
+  },
+  computed: {
+    canRemoveSourceBranch() {
+      const { shouldRemoveSourceBranch, canRemoveSourceBranch,
+        mergeUserId, currentUserId } = this.mr;
+
+      return !shouldRemoveSourceBranch && canRemoveSourceBranch && mergeUserId === currentUserId;
+    },
+  },
+  methods: {
+    cancelAutomaticMerge() {
+      this.isCancellingAutoMerge = true;
+      this.service.cancelAutomaticMerge()
+        .then(res => res.json())
+        .then((res) => {
+          eventHub.$emit('UpdateWidgetData', res);
+        })
+        .catch(() => {
+          this.isCancellingAutoMerge = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+    removeSourceBranch() {
+      const options = {
+        sha: this.mr.sha,
+        merge_when_pipeline_succeeds: true,
+        should_remove_source_branch: true,
+      };
+
+      this.isRemovingSourceBranch = true;
+      this.service.mergeResource.save(options)
+        .then(res => res.json())
+        .then((res) => {
+          if (res.status === 'merge_when_pipeline_succeeds') {
+            eventHub.$emit('MRWidgetUpdateRequested');
+          }
+        })
+        .catch(() => {
+          this.isRemovingSourceBranch = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <h4>
+        Set by
+        <mr-widget-author :author="mr.setToMWPSBy" />
+        to be merged automatically when the pipeline succeeds.
+        <a
+          v-if="mr.canCancelAutomaticMerge"
+          @click.prevent="cancelAutomaticMerge"
+          :disabled="isCancellingAutoMerge"
+          role="button"
+          href="#"
+          class="btn btn-xs btn-default js-cancel-auto-merge">
+          <i
+            v-if="isCancellingAutoMerge"
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+            Cancel automatic merge
+        </a>
+      </h4>
+      <section class="mr-info-list">
+        <div class="legend"></div>
+        <p>The changes will be merged into
+          <a
+            :href="mr.targetBranchPath"
+            class="label-branch">
+            {{mr.targetBranch}}
+          </a>
+        </p>
+        <p v-if="mr.shouldRemoveSourceBranch">
+          The source branch will be removed.
+        </p>
+        <p
+          v-else
+          class="with-button">
+          The source branch will not be removed.
+          <a
+            v-if="canRemoveSourceBranch"
+            :disabled="isRemovingSourceBranch"
+            @click.prevent="removeSourceBranch"
+            role="button"
+            class="btn btn-xs btn-default js-remove-source-branch"
+            href="#">
+            <i
+            v-if="isRemovingSourceBranch"
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+            Remove source branch
+          </a>
+        </p>
+      </section>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merged.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merged.js
new file mode 100644
index 00000000000..c7d32d18141
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_merged.js
@@ -0,0 +1,130 @@
+/* global Flash */
+
+import mrWidgetAuthorTime from '../../components/mr_widget_author_time';
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetMerged',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-author-and-time': mrWidgetAuthorTime,
+  },
+  data() {
+    return {
+      isMakingRequest: false,
+    };
+  },
+  computed: {
+    shouldShowRemoveSourceBranch() {
+      const { sourceBranchRemoved, isRemovingSourceBranch, canRemoveSourceBranch } = this.mr;
+
+      return !sourceBranchRemoved && canRemoveSourceBranch &&
+        !this.isMakingRequest && !isRemovingSourceBranch;
+    },
+    shouldShowSourceBranchRemoving() {
+      const { sourceBranchRemoved, isRemovingSourceBranch } = this.mr;
+      return !sourceBranchRemoved && (isRemovingSourceBranch || this.isMakingRequest);
+    },
+    shouldShowMergedButtons() {
+      const { canRevertInCurrentMR, canCherryPickInCurrentMR, revertInForkPath,
+        cherryPickInForkPath } = this.mr;
+
+      return canRevertInCurrentMR || canCherryPickInCurrentMR ||
+        revertInForkPath || cherryPickInForkPath;
+    },
+  },
+  methods: {
+    removeSourceBranch() {
+      this.isMakingRequest = true;
+      this.service.removeSourceBranch()
+        .then(res => res.json())
+        .then((res) => {
+          if (res.message === 'Branch was removed') {
+            eventHub.$emit('MRWidgetUpdateRequested', () => {
+              this.isMakingRequest = false;
+            });
+          }
+        })
+        .catch(() => {
+          this.isMakingRequest = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <mr-widget-author-and-time
+        actionText="Merged by"
+        :author="mr.mergedBy"
+        :dateTitle="mr.updatedAt"
+        :dateReadable="mr.mergedAt" />
+      <section class="mr-info-list">
+        <div class="legend"></div>
+        <p>
+          The changes were merged into
+          <span class="label-branch">
+            <a :href="mr.targetBranchPath">{{mr.targetBranch}}</a>
+          </span>
+        </p>
+        <p v-if="mr.sourceBranchRemoved">The source branch has been removed.</p>
+        <p v-if="shouldShowRemoveSourceBranch">
+          You can remove source branch now.
+          <button
+            @click="removeSourceBranch"
+            :class="{ disabled: isMakingRequest }"
+            type="button"
+            class="btn btn-xs btn-default js-remove-branch-button">
+            Remove Source Branch
+          </button>
+        </p>
+        <p v-if="shouldShowSourceBranchRemoving">
+          <i
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+          The source branch is being removed.
+        </p>
+      </section>
+      <div
+        v-if="shouldShowMergedButtons"
+        class="merged-buttons clearfix">
+        <a
+          v-if="mr.canRevertInCurrentMR"
+          class="btn btn-close btn-sm has-tooltip"
+          href="#modal-revert-commit"
+          data-toggle="modal"
+          data-container="body"
+          title="Revert this merge request in a new merge request">
+          Revert
+        </a>
+        <a
+          v-else-if="mr.revertInForkPath"
+          class="btn btn-close btn-sm has-tooltip"
+          data-method="post"
+          :href="mr.revertInForkPath"
+          title="Revert this merge request in a new merge request">
+          Revert
+        </a>
+        <a
+          v-if="mr.canCherryPickInCurrentMR"
+          class="btn btn-default btn-sm has-tooltip"
+          href="#modal-cherry-pick-commit"
+          data-toggle="modal"
+          data-container="body"
+          title="Cherry-pick this merge request in a new merge request">
+          Cherry-pick
+        </a>
+        <a
+          v-else-if="mr.cherryPickInForkPath"
+          class="btn btn-default btn-sm has-tooltip"
+          data-method="post"
+          :href="mr.cherryPickInForkPath"
+          title="Cherry-pick this merge request in a new merge request">
+          Cherry-pick
+        </a>
+      </div>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_missing_branch.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_missing_branch.js
new file mode 100644
index 00000000000..328382485f6
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_missing_branch.js
@@ -0,0 +1,34 @@
+import mrWidgetMergeHelp from '../../components/mr_widget_merge_help';
+
+export default {
+  name: 'MRWidgetMissingBranch',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  components: {
+    'mr-widget-merge-help': mrWidgetMergeHelp,
+  },
+  computed: {
+    missingBranchName() {
+      return this.mr.sourceBranchRemoved ? 'source' : 'target';
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold js-branch-text">
+        <span class="capitalize">
+          {{missingBranchName}}
+        </span> branch does not exist.
+        Please restore the {{missingBranchName}} branch or use a different {{missingBranchName}} branch.
+      </span>
+      <mr-widget-merge-help
+        :missing-branch="missingBranchName" />
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_not_allowed.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_not_allowed.js
new file mode 100644
index 00000000000..07169b349be
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_not_allowed.js
@@ -0,0 +1,17 @@
+export default {
+  name: 'MRWidgetNotAllowed',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        Ready to be merged automatically.
+        Ask someone with write access to this repository to merge this request.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_nothing_to_merge.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_nothing_to_merge.js
new file mode 100644
index 00000000000..8c4535f1337
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_nothing_to_merge.js
@@ -0,0 +1,17 @@
+export default {
+  name: 'MRWidgetNothingToMerge',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        There is nothing to merge from source branch into target branch.
+        Please push new commits or use a different branch.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_blocked.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_blocked.js
new file mode 100644
index 00000000000..31c53b679ed
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_blocked.js
@@ -0,0 +1,16 @@
+export default {
+  name: 'MRWidgetPipelineBlocked',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        Pipeline blocked. The pipeline for this merge request requires a manual action to proceed.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_failed.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_failed.js
new file mode 100644
index 00000000000..002820123ca
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_pipeline_failed.js
@@ -0,0 +1,16 @@
+export default {
+  name: 'MRWidgetPipelineBlocked',
+  template: `
+    <div class="mr-widget-body">
+      <button
+        class="btn btn-success btn-small"
+        disabled="true"
+        type="button">
+        Merge
+      </button>
+      <span class="bold">
+        The pipeline for this merge request failed. Please retry the job or push a new commit to fix the failure.
+      </span>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_ready_to_merge.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_ready_to_merge.js
new file mode 100644
index 00000000000..ebcc03e531b
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_ready_to_merge.js
@@ -0,0 +1,309 @@
+/* global Flash */
+
+import successSvg from 'icons/_icon_status_success.svg';
+import warningSvg from 'icons/_icon_status_warning.svg';
+import simplePoll from '~/lib/utils/simple_poll';
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetReadyToMerge',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  data() {
+    return {
+      removeSourceBranch: true,
+      mergeWhenBuildSucceeds: false,
+      useCommitMessageWithDescription: false,
+      setToMergeWhenPipelineSucceeds: false,
+      showCommitMessageEditor: false,
+      isMakingRequest: false,
+      isMergingImmediately: false,
+      commitMessage: this.mr.commitMessage,
+      successSvg,
+      warningSvg,
+    };
+  },
+  computed: {
+    commitMessageLinkTitle() {
+      const withDesc = 'Include description in commit message';
+      const withoutDesc = "Don't include description in commit message";
+
+      return this.useCommitMessageWithDescription ? withoutDesc : withDesc;
+    },
+    mergeButtonClass() {
+      const defaultClass = 'btn btn-success accept-merge-request';
+      const failedClass = `${defaultClass} btn-danger`;
+      const inActionClass = `${defaultClass} btn-info`;
+      const { pipeline, isPipelineActive, isPipelineFailed, hasCI, ciStatus } = this.mr;
+
+      if (hasCI && !ciStatus) {
+        return failedClass;
+      } else if (!pipeline) {
+        return defaultClass;
+      } else if (isPipelineActive) {
+        return inActionClass;
+      } else if (isPipelineFailed) {
+        return failedClass;
+      }
+
+      return defaultClass;
+    },
+    mergeButtonText() {
+      if (this.isMergingImmediately) {
+        return 'Merge in progress';
+      } else if (this.mr.isPipelineActive) {
+        return 'Merge when pipeline succeeds';
+      }
+
+      return 'Merge';
+    },
+    shouldShowMergeOptionsDropdown() {
+      return this.mr.isPipelineActive && !this.mr.onlyAllowMergeIfPipelineSucceeds;
+    },
+    isMergeButtonDisabled() {
+      const { commitMessage } = this;
+      return Boolean(!commitMessage.length
+        || !this.isMergeAllowed()
+        || this.isMakingRequest
+        || this.mr.preventMerge);
+    },
+    shouldShowSquashBeforeMerge() {
+      const { commitsCount, enableSquashBeforeMerge } = this.mr;
+      return enableSquashBeforeMerge && commitsCount > 1;
+    },
+  },
+  methods: {
+    isMergeAllowed() {
+      return !(this.mr.onlyAllowMergeIfPipelineSucceeds && this.mr.isPipelineFailed);
+    },
+    updateCommitMessage() {
+      const cmwd = this.mr.commitMessageWithDescription;
+      this.useCommitMessageWithDescription = !this.useCommitMessageWithDescription;
+      this.commitMessage = this.useCommitMessageWithDescription ? cmwd : this.mr.commitMessage;
+    },
+    toggleCommitMessageEditor() {
+      this.showCommitMessageEditor = !this.showCommitMessageEditor;
+    },
+    handleMergeButtonClick(mergeWhenBuildSucceeds, mergeImmediately) {
+      // TODO: Remove no-param-reassign
+      if (mergeWhenBuildSucceeds === undefined) {
+        mergeWhenBuildSucceeds = this.mr.isPipelineActive; // eslint-disable-line no-param-reassign
+      } else if (mergeImmediately) {
+        this.isMergingImmediately = true;
+      }
+
+      this.setToMergeWhenPipelineSucceeds = mergeWhenBuildSucceeds === true;
+
+      const options = {
+        sha: this.mr.sha,
+        commit_message: this.commitMessage,
+        merge_when_pipeline_succeeds: this.setToMergeWhenPipelineSucceeds,
+        should_remove_source_branch: this.removeSourceBranch === true,
+      };
+
+      // Only truthy in EE extension of this component
+      if (this.setAdditionalParams) {
+        this.setAdditionalParams(options);
+      }
+
+      this.isMakingRequest = true;
+      this.service.merge(options)
+        .then(res => res.json())
+        .then((res) => {
+          const hasError = res.status === 'failed' || res.status === 'hook_validation_error';
+
+          if (res.status === 'merge_when_pipeline_succeeds') {
+            eventHub.$emit('MRWidgetUpdateRequested');
+          } else if (res.status === 'success') {
+            this.initiateMergePolling();
+          } else if (hasError) {
+            eventHub.$emit('FailedToMerge', res.merge_error);
+          }
+        })
+        .catch(() => {
+          this.isMakingRequest = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+    initiateMergePolling() {
+      simplePoll((continuePolling, stopPolling) => {
+        this.handleMergePolling(continuePolling, stopPolling);
+      });
+    },
+    handleMergePolling(continuePolling, stopPolling) {
+      this.service.poll()
+        .then(res => res.json())
+        .then((res) => {
+          if (res.state === 'merged') {
+            // If state is merged we should update the widget and stop the polling
+            eventHub.$emit('MRWidgetUpdateRequested');
+            eventHub.$emit('FetchActionsContent');
+            if (window.mergeRequest) {
+              window.mergeRequest.updateStatusText('status-box-open', 'status-box-merged', 'Merged');
+              window.mergeRequest.decreaseCounter();
+            }
+            stopPolling();
+
+            // If user checked remove source branch and we didn't remove the branch yet
+            // we should start another polling for source branch remove process
+            if (this.removeSourceBranch && res.source_branch_exists) {
+              this.initiateRemoveSourceBranchPolling();
+            }
+          } else if (res.merge_error) {
+            eventHub.$emit('FailedToMerge', res.merge_error);
+            stopPolling();
+          } else {
+            // MR is not merged yet, continue polling until the state becomes 'merged'
+            continuePolling();
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong while merging this merge request. Please try again.'); // eslint-disable-line
+        });
+    },
+    initiateRemoveSourceBranchPolling() {
+      // We need to show source branch is being removed spinner in another component
+      eventHub.$emit('SetBranchRemoveFlag', [true]);
+
+      simplePoll((continuePolling, stopPolling) => {
+        this.handleRemoveBranchPolling(continuePolling, stopPolling);
+      });
+    },
+    handleRemoveBranchPolling(continuePolling, stopPolling) {
+      this.service.poll()
+        .then(res => res.json())
+        .then((res) => {
+          // If source branch exists then we should continue polling
+          // because removing a source branch is a background task and takes time
+          if (res.source_branch_exists) {
+            continuePolling();
+          } else {
+            // Branch is removed. Update widget, stop polling and hide the spinner
+            eventHub.$emit('MRWidgetUpdateRequested', () => {
+              eventHub.$emit('SetBranchRemoveFlag', [false]);
+            });
+            stopPolling();
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong while removing the source branch. Please try again.'); // eslint-disable-line
+        });
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <span class="btn-group">
+        <button
+          @click="handleMergeButtonClick()"
+          :disabled="isMergeButtonDisabled"
+          :class="mergeButtonClass"
+          type="button">
+          <i
+            v-if="isMakingRequest"
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+          {{mergeButtonText}}
+        </button>
+        <button
+          v-if="shouldShowMergeOptionsDropdown"
+          :disabled="isMergeButtonDisabled"
+          type="button"
+          class="btn btn-info dropdown-toggle"
+          data-toggle="dropdown">
+          <i
+            class="fa fa-caret-down"
+            aria-hidden="true" />
+          <span class="sr-only">
+            Select merge moment
+          </span>
+        </button>
+        <ul
+          v-if="shouldShowMergeOptionsDropdown"
+          class="dropdown-menu dropdown-menu-right"
+          role="menu">
+          <li>
+            <a
+              @click.prevent="handleMergeButtonClick(true)"
+              class="merge_when_pipeline_succeeds"
+              href="#">
+              <span
+                v-html="successSvg"
+                class="merge-opt-icon"
+                aria-hidden="true"></span>
+              <span class="merge-opt-title">Merge when pipeline succeeds</span>
+            </a>
+          </li>
+          <li>
+            <a
+              @click.prevent="handleMergeButtonClick(false, true)"
+              class="accept-merge-request"
+              href="#">
+              <span
+                v-html="warningSvg"
+                class="merge-opt-icon"
+                aria-hidden="true"></span>
+              <span class="merge-opt-title">Merge immediately</span>
+            </a>
+          </li>
+        </ul>
+      </span>
+      <template v-if="isMergeAllowed()">
+        <label class="spacing">
+          <input
+            v-model="removeSourceBranch"
+            :disabled="isMergeButtonDisabled"
+            type="checkbox"/> Remove source branch
+        </label>
+
+        <!-- Placeholder for EE extension of this component -->
+        <squash-before-merge
+          v-if="shouldShowSquashBeforeMerge"
+          :mr="mr"
+          :is-merge-button-disabled="isMergeButtonDisabled" />
+
+        <button
+          @click="toggleCommitMessageEditor"
+          :disabled="isMergeButtonDisabled"
+          class="btn btn-default btn-xs"
+          type="button">
+          Modify commit message
+        </button>
+        <div
+          v-if="showCommitMessageEditor"
+          class="prepend-top-default commit-message-editor">
+          <div class="form-group clearfix">
+            <label
+              class="control-label"
+              for="commit-message">
+              Commit message
+            </label>
+            <div class="col-sm-10">
+              <div class="commit-message-container">
+                <div class="max-width-marker"></div>
+                <textarea
+                  v-model="commitMessage"
+                  class="form-control js-commit-message"
+                  required="required"
+                  rows="14"
+                  name="Commit message"></textarea>
+              </div>
+              <p class="hint">Try to keep the first line under 52 characters and the others under 72.</p>
+              <div class="hint">
+                <a
+                  @click.prevent="updateCommitMessage"
+                  href="#">{{commitMessageLinkTitle}}</a>
+              </div>
+            </div>
+          </div>
+        </div>
+      </template>
+      <template v-else>
+        <span class="bold">
+          The pipeline for this merge request failed. Please retry the job or push a new commit to fix the failure.
+        </span>
+      </template>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_squash_before_merge.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_squash_before_merge.js
new file mode 100644
index 00000000000..bf8628d18a6
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_squash_before_merge.js
@@ -0,0 +1,15 @@
+/*
+The squash-before-merge button is EE only, but it's located right in the middle
+of the readyToMerge state component template.
+
+If we didn't declare this component in CE, we'd need to maintain a separate copy
+of the readyToMergeState template in EE, which is pretty big and likely to change.
+
+Instead, in CE, we declare the component, but it's hidden and is configured to do nothing.
+In EE, the configuration extends this object to add a functioning squash-before-merge
+button.
+*/
+
+export default {
+  template: '',
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_unresolved_discussions.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_unresolved_discussions.js
new file mode 100644
index 00000000000..f4ab2d9fa58
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_unresolved_discussions.js
@@ -0,0 +1,27 @@
+export default {
+  name: 'MRWidgetUnresolvedDiscussions',
+  props: {
+    mr: { type: Object, required: true },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge
+      </button>
+      <span class="bold">
+        There are unresolved discussions. Please resolve these discussions
+        <span v-if="mr.canCreateIssue">or</span>
+        <span v-else>.</span>
+      </span>
+      <a
+        v-if="mr.createIssueToResolveDiscussionsPath"
+        :href="mr.createIssueToResolveDiscussionsPath"
+        class="btn btn-default btn-xs js-create-issue">
+        Create an issue to resolve them later
+      </a>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_wip.js b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_wip.js
new file mode 100644
index 00000000000..cb02ffe93bd
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/mr_widget_wip.js
@@ -0,0 +1,59 @@
+/* global Flash */
+import eventHub from '../../event_hub';
+
+export default {
+  name: 'MRWidgetWIP',
+  props: {
+    mr: { type: Object, required: true },
+    service: { type: Object, required: true },
+  },
+  data() {
+    return {
+      isMakingRequest: false,
+    };
+  },
+  methods: {
+    removeWIP() {
+      this.isMakingRequest = true;
+      this.service.removeWIP()
+        .then(res => res.json())
+        .then((res) => {
+          eventHub.$emit('UpdateWidgetData', res);
+          new Flash('The merge request can now be merged.', 'notice'); // eslint-disable-line
+          $('.merge-request .detail-page-description .title').text(this.mr.title);
+        })
+        .catch(() => {
+          this.isMakingRequest = false;
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+  },
+  template: `
+    <div class="mr-widget-body">
+      <button
+        type="button"
+        class="btn btn-success btn-small"
+        disabled="true">
+        Merge</button>
+      <span class="bold">
+        This merge request is currently Work In Progress and therefore unable to merge
+      </span>
+      <template v-if="mr.removeWIPPath">
+        <i
+          class="fa fa-question-circle has-tooltip"
+          title="When this merge request is ready, remove the WIP: prefix from the title to allow it to be merged." />
+        <button
+          @click="removeWIP"
+          :disabled="isMakingRequest"
+          type="button"
+          class="btn btn-default btn-xs js-remove-wip">
+          <i
+            v-if="isMakingRequest"
+            class="fa fa-spinner fa-spin"
+            aria-hidden="true" />
+            Resolve WIP status
+        </button>
+      </template>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/dependencies.js b/app/assets/javascripts/vue_merge_request_widget/dependencies.js
new file mode 100644
index 00000000000..b2eb32ead5f
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/dependencies.js
@@ -0,0 +1,42 @@
+/**
+ * This file is the centerpiece of an attempt to reduce potential conflicts
+ * between the CE and EE versions of the MR widget. EE additions to the MR widget should
+ * be contained in the ./vue_merge_request_widget/ee directory, and should **extend**
+ * rather than mutate CE MR Widget code.
+ *
+ * This file should be the only source of conflicts between EE and CE. EE-only components should
+ * imported directly where they are needed, and import paths for EE extensions of CE components
+ * should overwrite import paths **without** changing the order of dependencies listed here.
+ */
+
+export { default as Vue } from 'vue';
+export { default as SmartInterval } from '~/smart_interval';
+export { default as WidgetHeader } from './components/mr_widget_header';
+export { default as WidgetMergeHelp } from './components/mr_widget_merge_help';
+export { default as WidgetPipeline } from './components/mr_widget_pipeline';
+export { default as WidgetDeployment } from './components/mr_widget_deployment';
+export { default as WidgetRelatedLinks } from './components/mr_widget_related_links';
+export { default as MergedState } from './components/states/mr_widget_merged';
+export { default as FailedToMerge } from './components/states/mr_widget_failed_to_merge';
+export { default as ClosedState } from './components/states/mr_widget_closed';
+export { default as LockedState } from './components/states/mr_widget_locked';
+export { default as WipState } from './components/states/mr_widget_wip';
+export { default as ArchivedState } from './components/states/mr_widget_archived';
+export { default as ConflictsState } from './components/states/mr_widget_conflicts';
+export { default as NothingToMergeState } from './components/states/mr_widget_nothing_to_merge';
+export { default as MissingBranchState } from './components/states/mr_widget_missing_branch';
+export { default as NotAllowedState } from './components/states/mr_widget_not_allowed';
+export { default as ReadyToMergeState } from './components/states/mr_widget_ready_to_merge';
+export { default as UnresolvedDiscussionsState } from './components/states/mr_widget_unresolved_discussions';
+export { default as PipelineBlockedState } from './components/states/mr_widget_pipeline_blocked';
+export { default as PipelineFailedState } from './components/states/mr_widget_pipeline_failed';
+export { default as MergeWhenPipelineSucceedsState } from './components/states/mr_widget_merge_when_pipeline_succeeds';
+export { default as AutoMergeFailed } from './components/states/mr_widget_auto_merge_failed';
+export { default as CheckingState } from './components/states/mr_widget_checking';
+export { default as MRWidgetStore } from './stores/mr_widget_store';
+export { default as MRWidgetService } from './services/mr_widget_service';
+export { default as eventHub } from './event_hub';
+export { default as getStateKey } from './stores/get_state_key';
+export { default as mrWidgetOptions } from './mr_widget_options';
+export { default as stateMaps } from './stores/state_maps';
+export { default as SquashBeforeMerge } from './components/states/mr_widget_squash_before_merge';
diff --git a/app/assets/javascripts/vue_merge_request_widget/event_hub.js b/app/assets/javascripts/vue_merge_request_widget/event_hub.js
new file mode 100644
index 00000000000..0948c2e5352
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/event_hub.js
@@ -0,0 +1,3 @@
+import Vue from 'vue';
+
+export default new Vue();
diff --git a/app/assets/javascripts/vue_merge_request_widget/index.js b/app/assets/javascripts/vue_merge_request_widget/index.js
new file mode 100644
index 00000000000..cd65ac069c5
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/index.js
@@ -0,0 +1,12 @@
+import {
+  Vue,
+  mrWidgetOptions,
+} from './dependencies';
+
+document.addEventListener('DOMContentLoaded', () => {
+  const vm = new Vue(mrWidgetOptions);
+
+  window.gl.mrWidget = {
+    checkStatus: vm.checkStatus,
+  };
+});
diff --git a/app/assets/javascripts/vue_merge_request_widget/mr_widget_options.js b/app/assets/javascripts/vue_merge_request_widget/mr_widget_options.js
new file mode 100644
index 00000000000..7c6c2d21714
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/mr_widget_options.js
@@ -0,0 +1,234 @@
+/* global Flash */
+
+import {
+  WidgetHeader,
+  WidgetMergeHelp,
+  WidgetPipeline,
+  WidgetDeployment,
+  WidgetRelatedLinks,
+  MergedState,
+  ClosedState,
+  LockedState,
+  WipState,
+  ArchivedState,
+  ConflictsState,
+  NothingToMergeState,
+  MissingBranchState,
+  NotAllowedState,
+  ReadyToMergeState,
+  UnresolvedDiscussionsState,
+  PipelineBlockedState,
+  PipelineFailedState,
+  FailedToMerge,
+  MergeWhenPipelineSucceedsState,
+  AutoMergeFailed,
+  CheckingState,
+  MRWidgetStore,
+  MRWidgetService,
+  eventHub,
+  stateMaps,
+  SquashBeforeMerge,
+} from './dependencies';
+
+export default {
+  el: '#js-vue-mr-widget',
+  name: 'MRWidget',
+  data() {
+    const store = new MRWidgetStore(gl.mrWidgetData);
+    const service = this.createService(store);
+    return {
+      mr: store,
+      service,
+    };
+  },
+  computed: {
+    componentName() {
+      return stateMaps.stateToComponentMap[this.mr.state];
+    },
+    shouldRenderMergeHelp() {
+      return stateMaps.statesToShowHelpWidget.indexOf(this.mr.state) > -1;
+    },
+    shouldRenderPipelines() {
+      return Object.keys(this.mr.pipeline).length || this.mr.hasCI;
+    },
+    shouldRenderRelatedLinks() {
+      return this.mr.relatedLinks;
+    },
+    shouldRenderDeployments() {
+      return this.mr.deployments.length;
+    },
+  },
+  methods: {
+    createService(store) {
+      const endpoints = {
+        mergePath: store.mergePath,
+        mergeCheckPath: store.mergeCheckPath,
+        cancelAutoMergePath: store.cancelAutoMergePath,
+        removeWIPPath: store.removeWIPPath,
+        sourceBranchPath: store.sourceBranchPath,
+        ciEnvironmentsStatusPath: store.ciEnvironmentsStatusPath,
+        statusPath: store.statusPath,
+        mergeActionsContentPath: store.mergeActionsContentPath,
+      };
+      return new MRWidgetService(endpoints);
+    },
+    checkStatus(cb) {
+      this.service.checkStatus()
+        .then(res => res.json())
+        .then((res) => {
+          this.mr.setData(res);
+          this.setFavicon();
+          if (cb) {
+            cb.call(null, res);
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+    initPolling() {
+      this.pollingInterval = new gl.SmartInterval({
+        callback: this.checkStatus,
+        startingInterval: 10000,
+        maxInterval: 30000,
+        hiddenInterval: 120000,
+        incrementByFactorOf: 5000,
+      });
+    },
+    initDeploymentsPolling() {
+      this.deploymentsInterval = new gl.SmartInterval({
+        callback: this.fetchDeployments,
+        startingInterval: 30000,
+        maxInterval: 120000,
+        hiddenInterval: 240000,
+        incrementByFactorOf: 15000,
+        immediateExecution: true,
+      });
+    },
+    setFavicon() {
+      if (this.mr.ciStatusFaviconPath) {
+        gl.utils.setFavicon(this.mr.ciStatusFaviconPath);
+      }
+    },
+    fetchDeployments() {
+      this.service.fetchDeployments()
+        .then(res => res.json())
+        .then((res) => {
+          if (res.length) {
+            this.mr.deployments = res;
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong while fetching the environments for this merge request. Please try again.'); // eslint-disable-line
+        });
+    },
+    fetchActionsContent() {
+      this.service.fetchMergeActionsContent()
+        .then((res) => {
+          if (res.body) {
+            const el = document.createElement('div');
+            el.innerHTML = res.body;
+            document.body.appendChild(el);
+          }
+        })
+        .catch(() => {
+          new Flash('Something went wrong. Please try again.'); // eslint-disable-line
+        });
+    },
+    resumePolling() {
+      this.pollingInterval.resume();
+    },
+    stopPolling() {
+      this.pollingInterval.stopTimer();
+    },
+    bindEventHubListeners() {
+      eventHub.$on('MRWidgetUpdateRequested', (cb) => {
+        this.checkStatus(cb);
+      });
+
+      // `params` should be an Array contains a Boolean, like `[true]`
+      // Passing parameter as Boolean didn't work.
+      eventHub.$on('SetBranchRemoveFlag', (params) => {
+        this.mr.isRemovingSourceBranch = params[0];
+      });
+
+      eventHub.$on('FailedToMerge', (mergeError) => {
+        this.mr.state = 'failedToMerge';
+        this.mr.mergeError = mergeError;
+      });
+
+      eventHub.$on('UpdateWidgetData', (data) => {
+        this.mr.setData(data);
+      });
+
+      eventHub.$on('FetchActionsContent', () => {
+        this.fetchActionsContent();
+      });
+
+      eventHub.$on('EnablePolling', () => {
+        this.resumePolling();
+      });
+
+      eventHub.$on('DisablePolling', () => {
+        this.stopPolling();
+      });
+    },
+    handleMounted() {
+      this.checkStatus();
+      this.setFavicon();
+      this.initDeploymentsPolling();
+    },
+  },
+  created() {
+    this.initPolling();
+    this.bindEventHubListeners();
+  },
+  mounted() {
+    this.handleMounted();
+  },
+  components: {
+    'mr-widget-header': WidgetHeader,
+    'mr-widget-merge-help': WidgetMergeHelp,
+    'mr-widget-pipeline': WidgetPipeline,
+    'mr-widget-deployment': WidgetDeployment,
+    'mr-widget-related-links': WidgetRelatedLinks,
+    'mr-widget-merged': MergedState,
+    'mr-widget-closed': ClosedState,
+    'mr-widget-locked': LockedState,
+    'mr-widget-failed-to-merge': FailedToMerge,
+    'mr-widget-wip': WipState,
+    'mr-widget-archived': ArchivedState,
+    'mr-widget-conflicts': ConflictsState,
+    'mr-widget-nothing-to-merge': NothingToMergeState,
+    'mr-widget-not-allowed': NotAllowedState,
+    'mr-widget-missing-branch': MissingBranchState,
+    'mr-widget-ready-to-merge': ReadyToMergeState,
+    'mr-widget-squash-before-merge': SquashBeforeMerge,
+    'mr-widget-checking': CheckingState,
+    'mr-widget-unresolved-discussions': UnresolvedDiscussionsState,
+    'mr-widget-pipeline-blocked': PipelineBlockedState,
+    'mr-widget-pipeline-failed': PipelineFailedState,
+    'mr-widget-merge-when-pipeline-succeeds': MergeWhenPipelineSucceedsState,
+    'mr-widget-auto-merge-failed': AutoMergeFailed,
+  },
+  template: `
+    <div class="mr-state-widget prepend-top-default">
+      <mr-widget-header :mr="mr" />
+      <mr-widget-pipeline
+        v-if="shouldRenderPipelines"
+        :mr="mr" />
+      <mr-widget-deployment
+        v-if="shouldRenderDeployments"
+        :mr="mr"
+        :service="service" />
+      <component
+        :is="componentName"
+        :mr="mr"
+        :service="service" />
+      <mr-widget-related-links
+        v-if="shouldRenderRelatedLinks"
+        :related-links="mr.relatedLinks" />
+      <mr-widget-merge-help v-if="shouldRenderMergeHelp" />
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_merge_request_widget/services/mr_widget_service.js b/app/assets/javascripts/vue_merge_request_widget/services/mr_widget_service.js
new file mode 100644
index 00000000000..42493be3372
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/services/mr_widget_service.js
@@ -0,0 +1,57 @@
+import Vue from 'vue';
+import VueResource from 'vue-resource';
+
+Vue.use(VueResource);
+
+export default class MRWidgetService {
+  constructor(endpoints) {
+    this.mergeResource = Vue.resource(endpoints.mergePath);
+    this.mergeCheckResource = Vue.resource(endpoints.mergeCheckPath);
+    this.cancelAutoMergeResource = Vue.resource(endpoints.cancelAutoMergePath);
+    this.removeWIPResource = Vue.resource(endpoints.removeWIPPath);
+    this.removeSourceBranchResource = Vue.resource(endpoints.sourceBranchPath);
+    this.deploymentsResource = Vue.resource(endpoints.ciEnvironmentsStatusPath);
+    this.pollResource = Vue.resource(`${endpoints.statusPath}?basic=true`);
+    this.mergeActionsContentResource = Vue.resource(endpoints.mergeActionsContentPath);
+  }
+
+  merge(data) {
+    return this.mergeResource.save(data);
+  }
+
+  cancelAutomaticMerge() {
+    return this.cancelAutoMergeResource.save();
+  }
+
+  removeWIP() {
+    return this.removeWIPResource.save();
+  }
+
+  removeSourceBranch() {
+    return this.removeSourceBranchResource.delete();
+  }
+
+  fetchDeployments() {
+    return this.deploymentsResource.get();
+  }
+
+  poll() {
+    return this.pollResource.get();
+  }
+
+  checkStatus() {
+    return this.mergeCheckResource.get();
+  }
+
+  fetchMergeActionsContent() {
+    return this.mergeActionsContentResource.get();
+  }
+
+  static stopEnvironment(url) {
+    return Vue.http.post(url);
+  }
+
+  static fetchMetrics(metricsUrl) {
+    return Vue.http.get(`${metricsUrl}.json`);
+  }
+}
diff --git a/app/assets/javascripts/vue_merge_request_widget/stores/get_state_key.js b/app/assets/javascripts/vue_merge_request_widget/stores/get_state_key.js
new file mode 100644
index 00000000000..fee4113f3c8
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/stores/get_state_key.js
@@ -0,0 +1,28 @@
+export default function deviseState(data) {
+  if (data.project_archived) {
+    return 'archived';
+  } else if (data.branch_missing) {
+    return 'missingBranch';
+  } else if (!data.commits_count) {
+    return 'nothingToMerge';
+  } else if (this.mergeStatus === 'unchecked') {
+    return 'checking';
+  } else if (data.has_conflicts) {
+    return 'conflicts';
+  } else if (data.work_in_progress) {
+    return 'workInProgress';
+  } else if (this.mergeWhenPipelineSucceeds) {
+    return this.mergeError ? 'autoMergeFailed' : 'mergeWhenPipelineSucceeds';
+  } else if (!this.canMerge) {
+    return 'notAllowedToMerge';
+  } else if (this.onlyAllowMergeIfPipelineSucceeds && this.isPipelineFailed) {
+    return 'pipelineFailed';
+  } else if (this.hasMergeableDiscussionsState) {
+    return 'unresolvedDiscussions';
+  } else if (this.isPipelineBlocked) {
+    return 'pipelineBlocked';
+  } else if (this.canBeMerged) {
+    return 'readyToMerge';
+  }
+  return null;
+}
diff --git a/app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js b/app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js
new file mode 100644
index 00000000000..faafeae5c5b
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js
@@ -0,0 +1,134 @@
+import Timeago from 'timeago.js';
+import { getStateKey } from '../dependencies';
+
+export default class MergeRequestStore {
+
+  constructor(data) {
+    this.setData(data);
+  }
+
+  setData(data) {
+    const currentUser = data.current_user;
+    const pipelineStatus = data.pipeline ? data.pipeline.details.status : null;
+
+    this.title = data.title;
+    this.targetBranch = data.target_branch;
+    this.sourceBranch = data.source_branch;
+    this.mergeStatus = data.merge_status;
+    this.sha = data.diff_head_sha;
+    this.commitMessage = data.merge_commit_message;
+    this.commitMessageWithDescription = data.merge_commit_message_with_description;
+    this.commitsCount = data.commits_count;
+    this.divergedCommitsCount = data.diverged_commits_count;
+    this.pipeline = data.pipeline || {};
+    this.deployments = this.deployments || data.deployments || [];
+
+    if (data.issues_links) {
+      const links = data.issues_links;
+      const { closing } = links;
+      const mentioned = links.mentioned_but_not_closing;
+      const assignToMe = links.assign_to_closing;
+
+      if (closing || mentioned || assignToMe) {
+        this.relatedLinks = { closing, mentioned, assignToMe };
+      }
+    }
+
+    this.updatedAt = data.updated_at;
+    this.mergedAt = MergeRequestStore.getEventDate(data.merge_event);
+    this.closedAt = MergeRequestStore.getEventDate(data.closed_event);
+    this.mergedBy = MergeRequestStore.getAuthorObject(data.merge_event);
+    this.closedBy = MergeRequestStore.getAuthorObject(data.closed_event);
+    this.setToMWPSBy = MergeRequestStore.getAuthorObject({ author: data.merge_user || {} });
+    this.mergeUserId = data.merge_user_id;
+    this.currentUserId = gon.current_user_id;
+    this.sourceBranchPath = data.source_branch_path;
+    this.sourceBranchLink = data.source_branch_with_namespace_link;
+    this.mergeError = data.merge_error;
+    this.targetBranchPath = data.target_branch_commits_path;
+    this.conflictResolutionPath = data.conflict_resolution_path;
+    this.cancelAutoMergePath = data.cancel_merge_when_pipeline_succeeds_path;
+    this.removeWIPPath = data.remove_wip_path;
+    this.sourceBranchRemoved = !data.source_branch_exists;
+    this.shouldRemoveSourceBranch = (data.merge_params || {}).should_remove_source_branch || false;
+    this.onlyAllowMergeIfPipelineSucceeds = data.only_allow_merge_if_pipeline_succeeds || false;
+    this.mergeWhenPipelineSucceeds = data.merge_when_pipeline_succeeds || false;
+    this.mergePath = data.merge_path;
+    this.statusPath = data.status_path;
+    this.emailPatchesPath = data.email_patches_path;
+    this.plainDiffPath = data.plain_diff_path;
+    this.createIssueToResolveDiscussionsPath = data.create_issue_to_resolve_discussions_path;
+    this.mergeCheckPath = data.merge_check_path;
+    this.mergeActionsContentPath = data.commit_change_content_path;
+    this.isRemovingSourceBranch = this.isRemovingSourceBranch || false;
+    this.isOpen = data.state === 'opened' || data.state === 'reopened' || false;
+    this.hasMergeableDiscussionsState = data.mergeable_discussions_state === false;
+    this.canRemoveSourceBranch = currentUser.can_remove_source_branch || false;
+    this.canMerge = !!data.merge_path;
+    this.canCreateIssue = currentUser.can_create_issue || false;
+    this.canCancelAutomaticMerge = !!data.cancel_merge_when_pipeline_succeeds_path;
+    this.canBeMerged = data.can_be_merged || false;
+
+    // Cherry-pick and Revert actions related
+    this.canCherryPickInCurrentMR = currentUser.can_cherry_pick_on_current_merge_request || false;
+    this.canRevertInCurrentMR = currentUser.can_revert_on_current_merge_request || false;
+    this.cherryPickInForkPath = currentUser.cherry_pick_in_fork_path;
+    this.revertInForkPath = currentUser.revert_in_fork_path;
+
+    // CI related
+    this.ciEnvironmentsStatusPath = data.ci_environments_status_path;
+    this.hasCI = data.has_ci;
+    this.ciStatus = data.ci_status;
+    this.isPipelineFailed = this.ciStatus ? (this.ciStatus === 'failed' || this.ciStatus === 'canceled') : false;
+    this.pipelineDetailedStatus = pipelineStatus;
+    this.isPipelineActive = data.pipeline ? data.pipeline.active : false;
+    this.isPipelineBlocked = pipelineStatus ? pipelineStatus.group === 'manual' : false;
+    this.ciStatusFaviconPath = pipelineStatus ? pipelineStatus.favicon : null;
+
+    this.setState(data);
+  }
+
+  setState(data) {
+    if (this.isOpen) {
+      this.state = getStateKey.call(this, data);
+    } else {
+      switch (data.state) {
+        case 'merged':
+          this.state = 'merged';
+          break;
+        case 'closed':
+          this.state = 'closed';
+          break;
+        case 'locked':
+          this.state = 'locked';
+          break;
+        default:
+          this.state = null;
+      }
+    }
+  }
+
+  static getAuthorObject(event) {
+    if (!event) {
+      return {};
+    }
+
+    return {
+      name: event.author.name || '',
+      username: event.author.username || '',
+      webUrl: event.author.web_url || '',
+      avatarUrl: event.author.avatar_url || '',
+    };
+  }
+
+  static getEventDate(event) {
+    const timeagoInstance = new Timeago();
+
+    if (!event) {
+      return '';
+    }
+
+    return timeagoInstance.format(event.updated_at);
+  }
+
+}
diff --git a/app/assets/javascripts/vue_merge_request_widget/stores/state_maps.js b/app/assets/javascripts/vue_merge_request_widget/stores/state_maps.js
new file mode 100644
index 00000000000..625d7a01c65
--- /dev/null
+++ b/app/assets/javascripts/vue_merge_request_widget/stores/state_maps.js
@@ -0,0 +1,36 @@
+const stateToComponentMap = {
+  merged: 'mr-widget-merged',
+  closed: 'mr-widget-closed',
+  locked: 'mr-widget-locked',
+  conflicts: 'mr-widget-conflicts',
+  missingBranch: 'mr-widget-missing-branch',
+  workInProgress: 'mr-widget-wip',
+  readyToMerge: 'mr-widget-ready-to-merge',
+  nothingToMerge: 'mr-widget-nothing-to-merge',
+  notAllowedToMerge: 'mr-widget-not-allowed',
+  archived: 'mr-widget-archived',
+  checking: 'mr-widget-checking',
+  unresolvedDiscussions: 'mr-widget-unresolved-discussions',
+  pipelineBlocked: 'mr-widget-pipeline-blocked',
+  pipelineFailed: 'mr-widget-pipeline-failed',
+  mergeWhenPipelineSucceeds: 'mr-widget-merge-when-pipeline-succeeds',
+  failedToMerge: 'mr-widget-failed-to-merge',
+  autoMergeFailed: 'mr-widget-auto-merge-failed',
+};
+
+const statesToShowHelpWidget = [
+  'locked',
+  'conflicts',
+  'workInProgress',
+  'readyToMerge',
+  'checking',
+  'unresolvedDiscussions',
+  'pipelineFailed',
+  'pipelineBlocked',
+  'autoMergeFailed',
+];
+
+export default {
+  stateToComponentMap,
+  statesToShowHelpWidget,
+};
diff --git a/app/assets/javascripts/vue_shared/components/memory_graph.js b/app/assets/javascripts/vue_shared/components/memory_graph.js
new file mode 100644
index 00000000000..2a605b24339
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/memory_graph.js
@@ -0,0 +1,36 @@
+export default {
+  name: 'MemoryGraph',
+  props: {
+    metrics: { type: Array, required: true },
+    width: { type: String, required: true },
+    height: { type: String, required: true },
+  },
+  data() {
+    return {
+      pathD: '',
+      pathViewBox: '',
+      // dotX: '',
+      // dotY: '',
+    };
+  },
+  mounted() {
+    const renderData = this.$props.metrics.map(v => v[1]);
+    const maxMemory = Math.max.apply(null, renderData);
+    const minMemory = Math.min.apply(null, renderData);
+    const diff = maxMemory - minMemory;
+    // const cx = 0;
+    // const cy = 0;
+    const lineWidth = renderData.length;
+    const linePath = renderData.map((y, x) => `${x} ${maxMemory - y}`);
+    this.pathD = `M ${linePath}`;
+    this.pathViewBox = `0 0 ${lineWidth} ${diff}`;
+  },
+  template: `
+    <div class="memory-graph-container">
+      <svg :width="width" :height="height" xmlns="http://www.w3.org/2000/svg">
+        <path :d="pathD" :viewBox="pathViewBox" />
+        <!--<circle r="0.8" :cx="dotX" :cy="dotY" tranform="translate(0 -1)" /> -->
+      </svg>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_shared/components/pipeline_status_icon.js b/app/assets/javascripts/vue_shared/components/pipeline_status_icon.js
new file mode 100644
index 00000000000..ae246ada01b
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/pipeline_status_icon.js
@@ -0,0 +1,23 @@
+import { statusClassToSvgMap } from '../pipeline_svg_icons';
+
+export default {
+  name: 'PipelineStatusIcon',
+  props: {
+    pipelineStatus: { type: Object, required: true, default: () => ({}) },
+  },
+  computed: {
+    svg() {
+      return statusClassToSvgMap[this.pipelineStatus.icon];
+    },
+    statusClass() {
+      return `ci-status-icon ci-status-icon-${this.pipelineStatus.group}`;
+    },
+  },
+  template: `
+    <div :class="statusClass">
+      <a class="icon-link" :href="pipelineStatus.details_path">
+        <span v-html="svg" aria-hidden="true"></span>
+      </a>
+    </div>
+  `,
+};
diff --git a/app/assets/javascripts/vue_shared/pipeline_svg_icons.js b/app/assets/javascripts/vue_shared/pipeline_svg_icons.js
new file mode 100644
index 00000000000..5af30ae74f0
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/pipeline_svg_icons.js
@@ -0,0 +1,43 @@
+import canceledSvg from 'icons/_icon_status_canceled.svg';
+import createdSvg from 'icons/_icon_status_created.svg';
+import failedSvg from 'icons/_icon_status_failed.svg';
+import manualSvg from 'icons/_icon_status_manual.svg';
+import pendingSvg from 'icons/_icon_status_pending.svg';
+import runningSvg from 'icons/_icon_status_running.svg';
+import skippedSvg from 'icons/_icon_status_skipped.svg';
+import successSvg from 'icons/_icon_status_success.svg';
+import warningSvg from 'icons/_icon_status_warning.svg';
+
+import canceledBorderlessSvg from 'icons/_icon_status_canceled_borderless.svg';
+import createdBorderlessSvg from 'icons/_icon_status_created_borderless.svg';
+import failedBorderlessSvg from 'icons/_icon_status_failed_borderless.svg';
+import manualBorderlessSvg from 'icons/_icon_status_manual_borderless.svg';
+import pendingBorderlessSvg from 'icons/_icon_status_pending_borderless.svg';
+import runningBorderlessSvg from 'icons/_icon_status_running_borderless.svg';
+import skippedBorderlessSvg from 'icons/_icon_status_skipped_borderless.svg';
+import successBorderlessSvg from 'icons/_icon_status_success_borderless.svg';
+import warningBorderlessSvg from 'icons/_icon_status_warning_borderless.svg';
+
+export const statusClassToSvgMap = {
+  icon_status_canceled: canceledSvg,
+  icon_status_created: createdSvg,
+  icon_status_failed: failedSvg,
+  icon_status_manual: manualSvg,
+  icon_status_pending: pendingSvg,
+  icon_status_running: runningSvg,
+  icon_status_skipped: skippedSvg,
+  icon_status_success: successSvg,
+  icon_status_warning: warningSvg,
+};
+
+export const statusClassToBorderlessSvgMap = {
+  icon_status_canceled: canceledBorderlessSvg,
+  icon_status_created: createdBorderlessSvg,
+  icon_status_failed: failedBorderlessSvg,
+  icon_status_manual: manualBorderlessSvg,
+  icon_status_pending: pendingBorderlessSvg,
+  icon_status_running: runningBorderlessSvg,
+  icon_status_skipped: skippedBorderlessSvg,
+  icon_status_success: successBorderlessSvg,
+  icon_status_warning: warningBorderlessSvg,
+};
diff --git a/app/assets/stylesheets/framework.scss b/app/assets/stylesheets/framework.scss
index 5bb7e8caec1..d2ec1791d2b 100644
--- a/app/assets/stylesheets/framework.scss
+++ b/app/assets/stylesheets/framework.scss
@@ -47,3 +47,4 @@
 @import "framework/emoji-sprites.scss";
 @import "framework/icons.scss";
 @import "framework/snippets.scss";
+@import "framework/memory_graph.scss";
diff --git a/app/assets/stylesheets/framework/common.scss b/app/assets/stylesheets/framework/common.scss
index 1a6f36d032d..57387b913dc 100644
--- a/app/assets/stylesheets/framework/common.scss
+++ b/app/assets/stylesheets/framework/common.scss
@@ -92,7 +92,8 @@ hr {
 .item-title { font-weight: 600; }
 
 /** FLASH message **/
-.author_link {
+.author_link,
+.author-link {
   color: $gl-link-color;
 }
 
diff --git a/app/assets/stylesheets/framework/icons.scss b/app/assets/stylesheets/framework/icons.scss
index 87667f39ab8..1b7d4e42258 100644
--- a/app/assets/stylesheets/framework/icons.scss
+++ b/app/assets/stylesheets/framework/icons.scss
@@ -1,4 +1,5 @@
-.ci-status-icon-success {
+.ci-status-icon-success,
+.ci-status-icon-passed {
   color: $green-500;
 
   svg {
diff --git a/app/assets/stylesheets/framework/memory_graph.scss b/app/assets/stylesheets/framework/memory_graph.scss
new file mode 100644
index 00000000000..8473f2ef094
--- /dev/null
+++ b/app/assets/stylesheets/framework/memory_graph.scss
@@ -0,0 +1,16 @@
+.memory-graph-container {
+  svg {
+    background: $white-light;
+  }
+
+  path {
+    fill: none;
+    stroke: $blue-500;
+    stroke-width: 1px;
+  }
+
+  circle {
+    stroke: $blue-700;
+    fill: $blue-700;
+  }
+}
diff --git a/app/assets/stylesheets/framework/variables.scss b/app/assets/stylesheets/framework/variables.scss
index 08bcb582613..4cfa5d718e9 100644
--- a/app/assets/stylesheets/framework/variables.scss
+++ b/app/assets/stylesheets/framework/variables.scss
@@ -111,6 +111,7 @@ $gl-link-hover-color: $blue-800;
 $gl-grayish-blue: #7f8fa4;
 $gl-gray: $gl-text-color;
 $gl-gray-dark: #313236;
+$gl-gray-light: #5c5c5c;
 $gl-header-color: #4c4e54;
 $gl-header-nav-hover-color: #434343;
 $placeholder-text-color: rgba(0, 0, 0, .42);
diff --git a/app/assets/stylesheets/pages/merge_requests.scss b/app/assets/stylesheets/pages/merge_requests.scss
index 72660113e3c..f4488ccd8fe 100644
--- a/app/assets/stylesheets/pages/merge_requests.scss
+++ b/app/assets/stylesheets/pages/merge_requests.scss
@@ -37,12 +37,6 @@
           @include btn-red;
         }
       }
-
-      .dropdown-toggle {
-        .fa {
-          color: inherit;
-        }
-      }
     }
 
     .accept-control {
@@ -88,13 +82,13 @@
     }
   }
 
-  .ci_widget {
-    border-bottom: 1px solid $well-inner-border;
+  .ci-widget {
     color: $gl-text-color;
     display: -webkit-flex;
     display: flex;
     -webkit-align-items: center;
     align-items: center;
+    padding: $gl-padding-top $gl-padding 0;
 
     i,
     svg {
@@ -115,16 +109,15 @@
       flex-wrap: wrap;
     }
 
-    .ci-status-icon > .icon-link > svg {
+    .ci-status-icon > .icon-link svg {
       width: 22px;
       height: 22px;
     }
   }
 
   .mr-widget-body,
-  .ci_widget,
   .mr-widget-footer {
-    padding: 16px;
+    margin: 16px;
   }
 
   .mr-widget-pipeline-graph {
@@ -166,12 +159,41 @@
 
   .normal {
     color: $gl-text-color;
+    font-size: 15px;
+  }
+
+  .capitalize {
+    text-transform: capitalize;
   }
 
   .js-deployment-link {
     display: inline-block;
   }
 
+  .mr-widget-help {
+    margin: $gl-padding;
+    color: $ci-skipped-color;
+  }
+
+  .mr-info-list {
+
+    &.mr-links {
+      margin-left: 28px;
+    }
+
+    &.mr-memory-usage {
+      margin-top: 10px;
+      margin-bottom: 10px;
+    }
+  }
+
+  .mr-widget-heading,
+  .mr-widget-body {
+    .btn-default.btn-xs {
+      margin-left: 5px;
+    }
+  }
+
   .mr-widget-body {
     h4 {
       font-weight: 600;
@@ -182,6 +204,10 @@
       &.has-conflicts .fa-exclamation-triangle {
         color: $gl-warning;
       }
+
+      time {
+        font-weight: normal;
+      }
     }
 
     .btn-grouped {
@@ -189,6 +215,80 @@
       margin-right: 7px;
     }
 
+    label {
+      font-weight: normal;
+    }
+
+    .spacing {
+      margin: 0 $gl-padding;
+    }
+
+    .bold {
+      margin-left: 5px;
+      font-weight: bold;
+      color: $gl-gray-light;
+    }
+
+    .state-label {
+      font-size: 16px;
+      font-weight: bold;
+      padding-right: 10px;
+    }
+
+    .danger {
+      color: $gl-danger;
+    }
+
+    .mr-widget-help {
+      margin: $gl-padding 0;
+    }
+
+    .with-button {
+      position: relative;
+      top: 6px;
+      margin-bottom: 24px;
+    }
+
+    .dropdown-menu {
+      li a {
+        padding: 5px;
+      }
+
+      .merge-opt-icon,
+      .merge-opt-title {
+        display: inline-block;
+        float: left;
+      }
+
+      .merge-opt-icon svg {
+        height: 15px;
+        width: 15px;
+      }
+
+      .merge-opt-title {
+        margin-left: 8px;
+      }
+    }
+
+    .dropdown-toggle {
+      .fa {
+        color: inherit;
+      }
+    }
+
+    .has-error-message + .has-custom-error {
+      margin-left: 0;
+    }
+
+    .has-custom-error {
+      display: inline-block;
+      margin-left: 70px;
+    }
+
+    .merge-error-text {
+      margin-left: 70px;
+    }
+
     @media (max-width: $screen-xs-max) {
       h4 {
         font-size: 14px;
@@ -220,6 +320,17 @@
         margin: 0;
       }
     }
+
+    .commit-message-editor {
+      label {
+        padding: 0;
+      }
+    }
+
+    &.mr-state-locked .mr-info-list {
+      margin-top: 10px;
+      margin-left: 12px;
+    }
   }
 
   .mr-widget-footer {
@@ -263,6 +374,24 @@
   font-size: 90%;
   margin: 0 3px;
   word-break: break-all;
+
+  &.label-truncated {
+    position: relative;
+    display: inline-block;
+    width: 250px;
+    margin-bottom: -3px;
+    white-space: nowrap;
+    text-overflow: clip;
+    line-height: 14px;
+
+    &::after {
+      position: absolute;
+      content: '...';
+      right: 0;
+      font-family: $regular_font;
+      background-color: $gray-light;
+    }
+  }
 }
 
 .commits-empty {
@@ -343,61 +472,74 @@
   }
 }
 
-.remove-message-pipes {
-  ul {
-    margin: 10px 0 0 12px;
-    padding: 0;
-    list-style: none;
-    border-left: 2px solid $border-color;
-    display: inline-block;
-  }
+.mr-info-list {
+  position: relative;
+  margin: 10px 0 $gl-padding 12px;
 
-  li {
+  p {
+    margin: 6px 0;
     position: relative;
-    margin: 0;
-    padding: 0;
-    display: block;
+    padding-left: 15px;
+
+    &::before {
+      content: '';
+      position: absolute;
+      border-top: 2px solid $border-color;
+      height: 1px;
+      top: 8px;
+      width: 8px;
+      left: 0;
+    }
+
+    &:last-child {
+      margin-bottom: 0;
 
-    span {
-      margin-left: 15px;
-      max-height: 20px;
+      &::before {
+        top: 14px;
+      }
     }
   }
 
-  li::before {
-    content: '';
+  .legend {
+    height: 100%;
+    width: 2px;
+    background: $border-color;
     position: absolute;
-    border-top: 2px solid $border-color;
-    height: 1px;
-    top: 8px;
-    width: 8px;
+    top: -5px;
+  }
+}
+
+.mr-info-list.mr-memory-usage {
+  .legend {
+    height: 75%;
   }
 
-  li:last-child {
+  p {
+    float: left;
+    padding-left: 20px;
+
     &::before {
-      top: 18px;
+      top: 13px;
     }
+  }
 
-    span {
-      display: block;
-      position: relative;
-      top: 5px;
-      margin-top: 5px;
-    }
+  .memory-graph-container {
+    float: left;
+    margin-left: 5px;
   }
 }
 
 .mr-source-target {
   background-color: $gray-light;
-  line-height: 31px;
-  border-style: solid;
-  border-width: 1px;
-  border-color: $border-color;
-  border-top-right-radius: 3px;
-  border-top-left-radius: 3px;
-  border-bottom: none;
-  padding: 16px;
-  margin-bottom: -1px;
+  border-radius: 3px 3px 0 0;
+  border-bottom: 1px solid $border-color;
+  padding: 0 $gl-padding;
+  margin-bottom: 6px;
+  line-height: 44px;
+
+  .dropdown-toggle .fa {
+    color: $gl-text-color;
+  }
 }
 
 .panel-new-merge-request {
@@ -587,3 +729,20 @@
     }
   }
 }
+
+.mr-memory-usage {
+  p.usage-info-loading {
+    margin-bottom: 6px;
+
+    .usage-info-load-spinner {
+      margin-right: 10px;
+      font-size: 16px;
+    }
+  }
+
+  @media (max-width: $screen-md-min) {
+    .mr-info-list.mr-memory-usage .legend {
+      height: 80%;
+    }
+  }
+}