resolve all instances of no-undef eslint rule violations

app/assets/javascripts/snippet/snippet_bundle.js

-/* eslint-disable func-names, space-before-function-paren, prefer-arrow-callback, no-var, no-undef, quotes, semi, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, prefer-arrow-callback, no-var, quotes, semi, padded-blocks, max-len */
+/* global ace */
+
 /*= require_tree . */
 (function() {

app/assets/javascripts/star.js

-/* eslint-disable func-names, space-before-function-paren, wrap-iife, no-unused-vars, one-var, no-var, one-var-declaration-per-line, prefer-arrow-callback, no-new, no-undef, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, wrap-iife, no-unused-vars, one-var, no-var, one-var-declaration-per-line, prefer-arrow-callback, no-new, padded-blocks, max-len */
+/* global Flash */
+
 (function() {
   this.Star = (function() {
     function Star() {

app/assets/javascripts/syntax_highlight.js

-/* eslint-disable func-names, space-before-function-paren, consistent-return, no-var, no-undef, no-else-return, prefer-arrow-callback, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, consistent-return, no-var, no-else-return, prefer-arrow-callback, padded-blocks, max-len */
+
 // Syntax Highlighter
 //
 // Applies a syntax highlighting color scheme CSS class to any element with the

app/assets/javascripts/todos.js.es6

-/* eslint-disable padded-blocks, class-methods-use-this, no-new, func-names, prefer-template, no-unneeded-ternary, object-shorthand, space-before-function-paren, comma-dangle, quote-props, consistent-return, no-else-return, semi, no-param-reassign, max-len, no-undef */
+/* eslint-disable padded-blocks, class-methods-use-this, no-new, func-names, prefer-template, no-unneeded-ternary, object-shorthand, space-before-function-paren, comma-dangle, quote-props, consistent-return, no-else-return, semi, no-param-reassign, max-len */
 /* global UsersSelect */
 /* global Turbolinks */
@@ -75,7 +75,7 @@
     allDoneClicked(e) {
       e.preventDefault();
       e.stopImmediatePropagation();
-      $target = $(e.currentTarget);
+      const $target = $(e.currentTarget);
       $target.disable();
       return $.ajax({
         type: 'POST',

app/assets/javascripts/u2f/authenticate.js

-/* eslint-disable func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, prefer-arrow-callback, no-undef, no-else-return, quotes, quote-props, comma-dangle, one-var, one-var-declaration-per-line, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, prefer-arrow-callback, no-else-return, quotes, quote-props, comma-dangle, one-var, one-var-declaration-per-line, padded-blocks, max-len */
+/* global u2f */
+/* global U2FError */
+/* global U2FUtil */
+
 // Authenticate U2F (universal 2nd factor) devices for users to authenticate with.
 //
 // State Flow #1: setup -> in_progress -> authenticated -> POST to server

app/assets/javascripts/u2f/error.js

-/* eslint-disable func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, no-console, quotes, prefer-template, no-undef, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, no-console, quotes, prefer-template, padded-blocks, max-len */
+/* global u2f */
+
 (function() {
   var bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };

app/assets/javascripts/u2f/register.js

-/* eslint-disable func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, no-undef, no-else-return, quotes, quote-props, comma-dangle, one-var, one-var-declaration-per-line, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, no-else-return, quotes, quote-props, comma-dangle, one-var, one-var-declaration-per-line, padded-blocks, max-len */
+/* global u2f */
+/* global U2FError */
+/* global U2FUtil */
+
 // Register U2F (universal 2nd factor) devices for users to authenticate with.
 //
 // State Flow #1: setup -> in_progress -> registered -> POST to server

app/assets/javascripts/users/calendar.js

-/* eslint-disable func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, camelcase, vars-on-top, semi, keyword-spacing, no-plusplus, no-undef, object-shorthand, comma-dangle, eqeqeq, no-mixed-operators, no-return-assign, newline-per-chained-call, prefer-arrow-callback, consistent-return, one-var, one-var-declaration-per-line, prefer-template, quotes, no-unused-vars, no-else-return, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, no-var, space-before-blocks, prefer-rest-params, wrap-iife, camelcase, vars-on-top, semi, keyword-spacing, no-plusplus, object-shorthand, comma-dangle, eqeqeq, no-mixed-operators, no-return-assign, newline-per-chained-call, prefer-arrow-callback, consistent-return, one-var, one-var-declaration-per-line, prefer-template, quotes, no-unused-vars, no-else-return, padded-blocks, max-len */
+/* global d3 */
+/* global dateFormat */
+
 (function() {
   var bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };

app/assets/javascripts/users_select.js

-/* eslint-disable func-names, space-before-function-paren, one-var, no-var, space-before-blocks, prefer-rest-params, wrap-iife, quotes, max-len, one-var-declaration-per-line, vars-on-top, prefer-arrow-callback, consistent-return, no-undef, comma-dangle, object-shorthand, no-shadow, no-unused-vars, no-plusplus, no-else-return, no-self-compare, prefer-template, no-unused-expressions, no-lonely-if, yoda, prefer-spread, no-void, camelcase, keyword-spacing, no-param-reassign, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, one-var, no-var, space-before-blocks, prefer-rest-params, wrap-iife, quotes, max-len, one-var-declaration-per-line, vars-on-top, prefer-arrow-callback, consistent-return, comma-dangle, object-shorthand, no-shadow, no-unused-vars, no-plusplus, no-else-return, no-self-compare, prefer-template, no-unused-expressions, no-lonely-if, yoda, prefer-spread, no-void, camelcase, keyword-spacing, no-param-reassign, padded-blocks */
+/* global Vue */
+/* global Issuable */
+/* global ListUser */
+
 (function() {
   var bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
     slice = [].slice;

app/assets/javascripts/zen_mode.js

-/* eslint-disable func-names, space-before-function-paren, wrap-iife, prefer-arrow-callback, no-unused-vars, consistent-return, no-undef, camelcase, comma-dangle, padded-blocks, max-len */
+/* eslint-disable func-names, space-before-function-paren, wrap-iife, prefer-arrow-callback, no-unused-vars, consistent-return, camelcase, comma-dangle, padded-blocks, max-len */
+/* global Dropzone */
+/* global Mousetrap */
+
 // Zen Mode (full screen) textarea
 //
 /*= provides zen_mode:enter */

app/views/shared/issuable/_sidebar.html.haml

@@ -167,4 +167,4 @@
       new IssuableContext('#{escape_javascript(current_user.to_json(only: [:username, :id, :name]))}');
       gl.Subscription.bindAll('.subscription');
       new gl.DueDateSelectors();
-      sidebar = new Sidebar();
+      window.sidebar = new Sidebar();

spec/javascripts/awards_handler_spec.js

-/* eslint-disable space-before-function-paren, no-var, one-var, one-var-declaration-per-line, no-unused-expressions, comma-dangle, no-undef, new-parens, no-unused-vars, quotes, jasmine/no-spec-dupes, prefer-template, padded-blocks, max-len */
+/* eslint-disable space-before-function-paren, no-var, one-var, one-var-declaration-per-line, no-unused-expressions, comma-dangle, new-parens, no-unused-vars, quotes, jasmine/no-spec-dupes, prefer-template, padded-blocks, max-len */
+/* global AwardsHandler */
 /*= require awards_handler */
 /*= require jquery */

spec/javascripts/behaviors/quick_submit_spec.js

-/* eslint-disable space-before-function-paren, no-var, no-return-assign, comma-dangle, no-undef, jasmine/no-spec-dupes, new-cap, padded-blocks, max-len */
+/* eslint-disable space-before-function-paren, no-var, no-return-assign, comma-dangle, jasmine/no-spec-dupes, new-cap, padded-blocks, max-len */
 /*= require behaviors/quick_submit */

spec/javascripts/graphs/stat_graph_contributors_graph_spec.js

-/* eslint-disable quotes, no-undef, indent, semi, object-curly-spacing, jasmine/no-suite-dupes, vars-on-top, no-var, padded-blocks, spaced-comment, max-len */
+/* eslint-disable quotes, indent, semi, object-curly-spacing, jasmine/no-suite-dupes, vars-on-top, no-var, padded-blocks, spaced-comment, max-len */
+/* global d3 */
+/* global ContributorsGraph */
+/* global ContributorsMasterGraph */
+
 //= require graphs/stat_graph_contributors_graph
 describe("ContributorsGraph", function () {

spec/javascripts/graphs/stat_graph_contributors_util_spec.js

-/* eslint-disable quotes, padded-blocks, no-var, camelcase, object-curly-spacing, semi, indent, object-property-newline, comma-dangle, comma-spacing, no-undef, spaced-comment, max-len, key-spacing, vars-on-top, quote-props, no-multi-spaces, max-len */
+/* eslint-disable quotes, padded-blocks, no-var, camelcase, object-curly-spacing, semi, indent, object-property-newline, comma-dangle, comma-spacing, spaced-comment, max-len, key-spacing, vars-on-top, quote-props, no-multi-spaces */
+/* global ContributorsStatGraphUtil */
+
 //= require graphs/stat_graph_contributors_util
 describe("ContributorsStatGraphUtil", function () {

spec/javascripts/graphs/stat_graph_spec.js

-/* eslint-disable quotes, padded-blocks, no-undef, semi */
+/* eslint-disable quotes, padded-blocks, semi */
+/* global StatGraph */
+
 //= require graphs/stat_graph
 describe("StatGraph", function () {

spec/javascripts/issue_spec.js

-/* eslint-disable space-before-function-paren, no-var, one-var, one-var-declaration-per-line, no-use-before-define, indent, no-undef, no-trailing-spaces, comma-dangle, padded-blocks, max-len */
+/* eslint-disable space-before-function-paren, no-var, one-var, one-var-declaration-per-line, no-use-before-define, indent, no-trailing-spaces, comma-dangle, padded-blocks, max-len */
+/* global Issue */
 /*= require lib/utils/text_utility */
 /*= require issue */
@@ -70,7 +71,7 @@
         $('input[type=checkbox]').attr('checked', true).trigger('change');
         expect($('.js-task-list-field').val()).toBe('- [x] Task List Item');
       });
-      
+
       it('submits an ajax request on tasklist:changed', function() {
         spyOn(jQuery, 'ajax').and.callFake(function(req) {
           expect(req.type).toBe('PATCH');

spec/javascripts/labels_issue_sidebar_spec.js.es6

-/* eslint-disable no-new, no-undef, no-plusplus, object-curly-spacing, prefer-const, semi */
+/* eslint-disable no-new, no-plusplus, object-curly-spacing, prefer-const, semi */
+/* global IssuableContext */
+/* global LabelsSelect */
 //= require lib/utils/type_utility
 //= require jquery

spec/javascripts/line_highlighter_spec.js

-/* eslint-disable space-before-function-paren, no-var, no-param-reassign, quotes, prefer-template, no-else-return, new-cap, dot-notation, no-undef, no-return-assign, comma-dangle, no-new, one-var, one-var-declaration-per-line, no-plusplus, jasmine/no-spec-dupes, no-underscore-dangle, padded-blocks, max-len */
+/* eslint-disable space-before-function-paren, no-var, no-param-reassign, quotes, prefer-template, no-else-return, new-cap, dot-notation, no-return-assign, comma-dangle, no-new, one-var, one-var-declaration-per-line, no-plusplus, jasmine/no-spec-dupes, no-underscore-dangle, padded-blocks, max-len */
+/* global LineHighlighter */
 /*= require line_highlighter */

spec/javascripts/merge_request_spec.js

-/* eslint-disable space-before-function-paren, no-return-assign, no-undef, padded-blocks */
+/* eslint-disable space-before-function-paren, no-return-assign, padded-blocks */
+/* global MergeRequest */
 /*= require merge_request */