Breaking: fix config loading (fixes #11510, fixes #11559, fixes #11586)

Makefile.js

@@ -26,7 +26,7 @@ const lodash = require("lodash"),
     ejs = require("ejs"),
     loadPerf = require("load-perf"),
     yaml = require("js-yaml"),
-    CLIEngine = require("./lib/cli-engine");
+    { CLIEngine } = require("./lib/cli-engine");
 
 const { cat, cd, cp, echo, exec, exit, find, ls, mkdir, pwd, rm, test } = require("shelljs");
 
@@ -849,7 +849,7 @@ target.checkRuleFiles = function() {
         // check parity between rules index file and rules directory
         const builtInRulesIndexPath = "./lib/built-in-rules-index";
         const ruleIdsInIndex = require(builtInRulesIndexPath);
-        const ruleEntryFromIndexIsMissing = !(basename in ruleIdsInIndex);
+        const ruleEntryFromIndexIsMissing = !ruleIdsInIndex.has(basename);
 
         if (ruleEntryFromIndexIsMissing) {
             console.error(`Missing rule from index (${builtInRulesIndexPath}.js): ${basename}. If you just added a ` +

conf/environments.js

@@ -14,7 +14,8 @@ const globals = require("globals");
 // Public Interface
 //------------------------------------------------------------------------------
 
-module.exports = {
+/** @type {Map<string, import("../lib/util/types").Environment>} */
+module.exports = new Map(Object.entries({
     builtin: {
         globals: globals.es5
     },
@@ -106,4 +107,4 @@ module.exports = {
     greasemonkey: {
         globals: globals.greasemonkey
     }
-};
+}));

conf/eslint-all.js

@@ -15,15 +15,17 @@ const builtInRules = require("../lib/built-in-rules-index");
 // Helpers
 //------------------------------------------------------------------------------
 
-const enabledRules = Object.keys(builtInRules).reduce((result, ruleId) => {
-    if (!builtInRules[ruleId].meta.deprecated) {
-        result[ruleId] = "error";
+const allRules = {};
+
+for (const [ruleId, rule] of builtInRules) {
+    if (!rule.meta.deprecated) {
+        allRules[ruleId] = "error";
     }
-    return result;
-}, {});
+}
 
 //------------------------------------------------------------------------------
 // Public Interface
 //------------------------------------------------------------------------------
 
-module.exports = { rules: enabledRules };
+/** @type {import("../lib/util/types").ConfigData} */
+module.exports = { rules: allRules };

conf/eslint-recommended.js

@@ -7,12 +7,13 @@
 "use strict";
 
 const builtInRules = require("../lib/built-in-rules-index");
+const recommendedRules = {};
 
-module.exports = {
-    rules: Object.assign(
-        {},
-        ...Object.keys(builtInRules)
-            .filter(ruleId => builtInRules[ruleId].meta.docs.recommended)
-            .map(ruleId => ({ [ruleId]: "error" }))
-    )
-};
+for (const [ruleId, rule] of builtInRules) {
+    if (rule.meta.docs.recommended) {
+        recommendedRules[ruleId] = "error";
+    }
+}
+
+/** @type {import("../lib/util/types").ConfigData} */
+module.exports = { rules: recommendedRules };

docs/user-guide/migrating-to-6.0.0.md

@@ -180,8 +180,6 @@ Due to a bug, the glob patterns in a `files` list in an `overrides` section of a
 
 ## <a name="overrides-precedence"></a> Overrides in an extended config file can now be overridden by a parent config file
 
-**Note:** This update is planned, but has not been implemented in the latest alpha release yet.
-
 Due to a bug, it was previously the case that an `overrides` block in a shareable config had precedence over the top level of a parent config. For example, with the following config setup, the `semi` rule would end up enabled even though it was explicitly disabled in the end user's config:
 
 ```js

lib/api.js

@@ -5,11 +5,11 @@
 
 "use strict";
 
-const Linter = require("./linter");
+const { Linter } = require("./linter");
 
 module.exports = {
     Linter,
-    CLIEngine: require("./cli-engine"),
+    CLIEngine: require("./cli-engine").CLIEngine,
     RuleTester: require("./testers/rule-tester"),
     SourceCode: require("./util/source-code")
 };

lib/built-in-rules-index.js

@@ -8,7 +8,8 @@
 
 /* eslint sort-keys: ["error", "asc"] */
 
-module.exports = {
+/** @type {Map<string, import("./util/types").Rule>} */
+module.exports = new Map(Object.entries({
     "accessor-pairs": require("./rules/accessor-pairs"),
     "array-bracket-newline": require("./rules/array-bracket-newline"),
     "array-bracket-spacing": require("./rules/array-bracket-spacing"),
@@ -275,4 +276,4 @@ module.exports = {
     "wrap-regex": require("./rules/wrap-regex"),
     "yield-star-spacing": require("./rules/yield-star-spacing"),
     yoda: require("./rules/yoda")
-};
+}));