Change eslint rules from configuration comments to configuration file

src/ci/docker/host-x86_64/mingw-check/Dockerfile

@@ -41,4 +41,4 @@ ENV SCRIPT python3 ../x.py --stage 2 test src/tools/expand-yaml-anchors && \
            /scripts/validate-error-codes.sh && \
            # Runs checks to ensure that there are no ES5 issues in our JS code.
            es-check es6 ../src/librustdoc/html/static/js/*.js && \
-           eslint ../src/librustdoc/html/static/js/*.js
+           eslint -c ../src/librustdoc/html/static/.eslintrc.js ../src/librustdoc/html/static/js/*.js

src/librustdoc/html/static/.eslintrc.js

@@ -16,6 +16,9 @@ module.exports = {
         "semi": [
             "error",
             "always"
-        ]
+        ],
+        "no-var": ["error"],
+        "prefer-const": ["error"],
+        "prefer-arrow-callback": ["error"],
     }
 };

src/librustdoc/html/static/js/externs.js

@@ -1,9 +1,6 @@
 // This file contains type definitions that are processed by the Closure Compiler but are
 // not put into the JavaScript we include as part of the documentation. It is used for
 // type checking. See README.md in this directory for more info.
-/* eslint-env es6 */
-/* eslint no-var: "error" */
-/* eslint prefer-const: "error" */
 
 /* eslint-disable */
 let searchState;

src/librustdoc/html/static/js/main.js

@@ -1,7 +1,3 @@
-/* eslint-env es6 */
-/* eslint no-var: "error" */
-/* eslint prefer-const: "error" */
-/* eslint prefer-arrow-callback: "error" */
 // Local js definitions:
 /* global addClass, getSettingValue, hasClass, searchState */
 /* global onEach, onEachLazy, removeClass */

src/librustdoc/html/static/js/scrape-examples.js

@@ -1,7 +1,3 @@
-/* eslint-env es6 */
-/* eslint no-var: "error" */
-/* eslint prefer-const: "error" */
-/* eslint prefer-arrow-callback: "error" */
 /* global addClass, hasClass, removeClass, onEachLazy */
 
 "use strict";

src/librustdoc/html/static/js/search.js

@@ -1,7 +1,3 @@
-/* eslint-env es6 */
-/* eslint no-var: "error" */
-/* eslint prefer-const: "error" */
-/* eslint prefer-arrow-callback: "error" */
 /* global addClass, getNakedUrl, getSettingValue, hasOwnPropertyRustdoc, initSearch, onEach */
 /* global onEachLazy, removeClass, searchState, browserSupportsHistoryApi */
 

src/librustdoc/html/static/js/settings.js

@@ -1,7 +1,3 @@
-/* eslint-env es6 */
-/* eslint no-var: "error" */
-/* eslint prefer-const: "error" */
-/* eslint prefer-arrow-callback: "error" */
 // Local js definitions:
 /* global getSettingValue, getVirtualKey, updateLocalStorage, updateSystemTheme */
 /* global addClass, removeClass, onEach, onEachLazy, NOT_DISPLAYED_ID */

src/librustdoc/html/static/js/source-script.js

@@ -1,8 +1,3 @@
-/* eslint-env es6 */
-/* eslint no-var: "error" */
-/* eslint prefer-const: "error" */
-/* eslint prefer-arrow-callback: "error" */
-
 // From rust:
 /* global search, sourcesIndex */
 

src/librustdoc/html/static/js/storage.js

@@ -1,8 +1,3 @@
-/* eslint-env es6 */
-/* eslint no-var: "error" */
-/* eslint prefer-const: "error" */
-/* eslint prefer-arrow-callback: "error" */
-
 "use strict";
 
 const darkThemes = ["dark", "ayu"];