feat: support eslint flat config

Author: bmish

README.md

@@ -25,10 +25,21 @@ Or
 npm install --save-dev eslint-plugin-ember
 ```
 
-### 2. Modify your `.eslintrc.js`
+### 2. Update your config
 
 ```js
-// .eslintrc.js
+// eslint.config.js (flat config)
+const eslintPluginEmberRecommended = require('eslint-plugin-ember/configs/recommended');
+
+module.exports = [
+  ...eslintPluginEmberRecommended,
+];
+```
+
+or
+
+```js
+// .eslintrc.js (legacy config)
 module.exports = {
   plugins: ['ember'],
   extends: [

lib/config-legacy/recommended.js

@@ -0,0 +1,39 @@
+const rules = require('../recommended-rules');
+const util = require('ember-template-imports/src/util');
+
+module.exports = {
+  root: true,
+
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: 'module',
+  },
+
+  env: {
+    browser: true,
+    es2020: true,
+  },
+
+  plugins: ['ember'],
+
+  rules,
+
+  overrides: [
+    /**
+     * We don't want to *always* have the preprocessor active,
+     * it's only relevant on gjs and gts files.
+     *
+     * Additionally, we need to declare a global (which is private API)
+     * so that ESLint doesn't report errors about the variable being undefined.
+     * While this is true, it's a temporary thing for babel to do further processing
+     * on -- and isn't relevant to user-land code.
+     */
+    {
+      files: ['**/*.gjs', '**/*.gts'],
+      processor: 'ember/<template>',
+      globals: {
+        [util.TEMPLATE_TAG_PLACEHOLDER]: 'readonly',
+      },
+    },
+  ],
+};

lib/config/recommended.js

@@ -1,24 +1,22 @@
 const rules = require('../recommended-rules');
 const util = require('ember-template-imports/src/util');
+const plugin = require('../index');
 
-module.exports = {
-  root: true,
+module.exports = [
+  {
+    languageOptions: {
+      parserOptions: {
+        ecmaVersion: 2020,
+        sourceType: 'module',
+      },
+    },
 
-  parserOptions: {
-    ecmaVersion: 2020,
-    sourceType: 'module',
-  },
+    plugins: { ember: plugin },
 
-  env: {
-    browser: true,
-    es2020: true,
+    rules,
   },
 
-  plugins: ['ember'],
-
-  rules,
-
-  overrides: [
+  {
     /**
      * We don't want to *always* have the preprocessor active,
      * it's only relevant on gjs and gts files.
@@ -28,12 +26,12 @@ module.exports = {
      * While this is true, it's a temporary thing for babel to do further processing
      * on -- and isn't relevant to user-land code.
      */
-    {
-      files: ['**/*.gjs', '**/*.gts'],
-      processor: 'ember/<template>',
+    files: ['**/*.gjs', '**/*.gts'],
+    processor: 'ember/<template>',
+    languageOptions: {
       globals: {
         [util.TEMPLATE_TAG_PLACEHOLDER]: 'readonly',
       },
     },
-  ],
-};
+  },
+];

lib/index.js

@@ -1,12 +1,16 @@
 'use strict';
 
 const requireIndex = require('requireindex');
-
+const pkg = require("../package.json");
 const gjs = require('./preprocessors/glimmer');
 
 module.exports = {
+  meta: {
+    name: pkg.name,
+    version: pkg.version
+  },
   rules: requireIndex(`${__dirname}/rules`),
-  configs: requireIndex(`${__dirname}/config`),
+  configs: requireIndex(`${__dirname}/config-legacy`),
   utils: {
     ember: require('./utils/ember'),
   },

package.json

@@ -21,7 +21,10 @@
     "url": "git+https://github.com/ember-cli/eslint-plugin-ember.git"
   },
   "license": "MIT",
-  "exports": "./lib/index.js",
+  "exports": {
+    ".": "./lib/index.js",
+    "./configs/*": "./lib/config/*.js"
+  },
   "main": "./lib/index.js",
   "directories": {
     "test": "test",
@@ -84,7 +87,7 @@
     "@babel/plugin-proposal-class-properties": "^7.13.0",
     "@babel/plugin-proposal-decorators": "^7.15.8",
     "@typescript-eslint/parser": "^5.31.0",
-    "eslint": "^8.20.0",
+    "eslint": "^8.55.0",
     "eslint-config-prettier": "^8.5.0",
     "eslint-doc-generator": "^1.0.0",
     "eslint-plugin-eslint-comments": "^3.2.0",

tests/plugin-exports.js

@@ -2,7 +2,7 @@
 
 const plugin = require('../lib');
 const ember = require('../lib/utils/ember');
-const recommended = require('../lib/config/recommended');
+const recommendedLegacy = require('../lib/config-legacy/recommended');
 
 describe('plugin exports', () => {
   describe('utils', () => {
@@ -12,8 +12,8 @@ describe('plugin exports', () => {
   });
 
   describe('configs', () => {
-    it('has the right configurations', () => {
-      expect(plugin.configs).toStrictEqual({ recommended });
+    it('has the right configurations (legacy)', () => {
+      expect(plugin.configs).toStrictEqual({ recommended: recommendedLegacy });
     });
   });
 });

yarn.lock

@@ -499,15 +499,15 @@
   dependencies:
     eslint-visitor-keys "^3.3.0"
 
-"@eslint-community/regexpp@^4.4.0":
-  version "4.4.0"
-  resolved "https://registry.yarnpkg.com/@eslint-community/regexpp/-/regexpp-4.4.0.tgz#3e61c564fcd6b921cb789838631c5ee44df09403"
-  integrity sha512-A9983Q0LnDGdLPjxyXQ00sbV+K+O+ko2Dr+CZigbHWtX9pNfxlaBkMR8X1CztI73zuEyEBXTVjx7CE+/VSwDiQ==
+"@eslint-community/regexpp@^4.6.1":
+  version "4.10.0"
+  resolved "https://registry.yarnpkg.com/@eslint-community/regexpp/-/regexpp-4.10.0.tgz#548f6de556857c8bb73bbee70c35dc82a2e74d63"
+  integrity sha512-Cu96Sd2By9mCNTx2iyKOmq10v22jUVQv0lQnlGNy16oE9589yE+QADPbrMGCkA51cKZSg3Pu/aTJVTGfL/qjUA==
 
-"@eslint/eslintrc@^2.1.0":
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-2.1.0.tgz#82256f164cc9e0b59669efc19d57f8092706841d"
-  integrity sha512-Lj7DECXqIVCqnqjjHMPna4vn6GJcMgul/wuS0je9OZ9gsL0zzDpKPVtcG1HaDVc+9y+qgXneTeUMbCqXJNpH1A==
+"@eslint/eslintrc@^2.1.4":
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/@eslint/eslintrc/-/eslintrc-2.1.4.tgz#388a269f0f25c1b6adc317b5a2c55714894c70ad"
+  integrity sha512-269Z39MS6wVJtsoUl10L60WdkhJVdPG24Q4eZTH3nnF6lpvSShEK3wQjDX9JRWAUPvPh7COouPpU9IrqaZFvtQ==
   dependencies:
     ajv "^6.12.4"
     debug "^4.3.2"
@@ -519,10 +519,10 @@
     minimatch "^3.1.2"
     strip-json-comments "^3.1.1"
 
-"@eslint/js@8.44.0":
-  version "8.44.0"
-  resolved "https://registry.yarnpkg.com/@eslint/js/-/js-8.44.0.tgz#961a5903c74139390478bdc808bcde3fc45ab7af"
-  integrity sha512-Ag+9YM4ocKQx9AarydN0KY2j0ErMHNIocPDrVo8zAE44xLTjEtz81OdR68/cydGtk6m6jDb5Za3r2useMzYmSw==
+"@eslint/js@8.55.0":
+  version "8.55.0"
+  resolved "https://registry.yarnpkg.com/@eslint/js/-/js-8.55.0.tgz#b721d52060f369aa259cf97392403cb9ce892ec6"
+  integrity sha512-qQfo2mxH5yVom1kacMtZZJFVdW+E70mqHMJvVg6WTLo+VBuQJ4TojZlfWBjK0ve5BdEeNAVxOsl/nvNMpJOaJA==
 
 "@gar/promisify@^1.0.1":
   version "1.1.3"
@@ -591,12 +591,12 @@
   resolved "https://registry.yarnpkg.com/@handlebars/parser/-/parser-2.0.0.tgz#5e8b7298f31ff8f7b260e6b7363c7e9ceed7d9c5"
   integrity sha512-EP9uEDZv/L5Qh9IWuMUGJRfwhXJ4h1dqKTT4/3+tY0eu7sPis7xh23j61SYUnNF4vqCQvvUXpDo9Bh/+q1zASA==
 
-"@humanwhocodes/config-array@^0.11.10":
-  version "0.11.10"
-  resolved "https://registry.yarnpkg.com/@humanwhocodes/config-array/-/config-array-0.11.10.tgz#5a3ffe32cc9306365fb3fd572596cd602d5e12d2"
-  integrity sha512-KVVjQmNUepDVGXNuoRRdmmEjruj0KfiGSbS8LVc12LMsWDQzRXJ0qdhN8L8uUigKpfEHRhlaQFY0ib1tnUbNeQ==
+"@humanwhocodes/config-array@^0.11.13":
+  version "0.11.13"
+  resolved "https://registry.yarnpkg.com/@humanwhocodes/config-array/-/config-array-0.11.13.tgz#075dc9684f40a531d9b26b0822153c1e832ee297"
+  integrity sha512-JSBDMiDKSzQVngfRjOdFXgFfklaXI4K9nLF49Auh21lmBWRLIK3+xTErTWD4KU54pb6coM6ESE7Awz/FNU3zgQ==
   dependencies:
-    "@humanwhocodes/object-schema" "^1.2.1"
+    "@humanwhocodes/object-schema" "^2.0.1"
     debug "^4.1.1"
     minimatch "^3.0.5"
 
@@ -605,10 +605,10 @@
   resolved "https://registry.yarnpkg.com/@humanwhocodes/module-importer/-/module-importer-1.0.1.tgz#af5b2691a22b44be847b0ca81641c5fb6ad0172c"
   integrity sha512-bxveV4V8v5Yb4ncFTT3rPSgZBOpCkjfK0y4oVVVJwIuDVBRMDXrPyXRL988i5ap9m9bnyEEjWfm5WkBmtffLfA==
 
-"@humanwhocodes/object-schema@^1.2.1":
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/@humanwhocodes/object-schema/-/object-schema-1.2.1.tgz#b520529ec21d8e5945a1851dfd1c32e94e39ff45"
-  integrity sha512-ZnQMnLV4e7hDlUvw8H+U8ASL02SS2Gn6+9Ac3wGGLIe7+je2AeAOxPY+izIPJDfFDb7eDjev0Us8MO1iFRN8hA==
+"@humanwhocodes/object-schema@^2.0.1":
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/@humanwhocodes/object-schema/-/object-schema-2.0.1.tgz#e5211452df060fa8522b55c7b3c0c4d1981cb044"
+  integrity sha512-dvuCeX5fC9dXgJn9t+X5atfmgQAzUOWqS1254Gh0m6i8wKd10ebXkfNKiRK+1GWi/yTvvLDHpoxLr0xxxeslWw==
 
 "@iarna/[email protected]":
   version "2.2.5"
@@ -1383,6 +1383,11 @@
     "@typescript-eslint/types" "5.60.1"
     eslint-visitor-keys "^3.3.0"
 
+"@ungap/structured-clone@^1.2.0":
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/@ungap/structured-clone/-/structured-clone-1.2.0.tgz#756641adb587851b5ccb3e095daf27ae581c8406"
+  integrity sha512-zuVdFrMJiuCDQUMCzQaD6KL28MjnqqN8XnAqiEq9PNm/hCPTSGfrXCOfwj1ow4LFb/tNymJPwsNbVePc1xFqrQ==
+
 JSONStream@^1.3.5:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/JSONStream/-/JSONStream-1.3.5.tgz#3208c1f08d3a4d99261ab64f92302bc15e111ca0"
@@ -1460,7 +1465,7 @@ ajv-errors@^1.0.1:
   resolved "https://registry.yarnpkg.com/ajv-errors/-/ajv-errors-1.0.1.tgz#f35986aceb91afadec4102fbd85014950cefa64d"
   integrity sha512-DCRfO/4nQ+89p/RK43i8Ezd41EqdGIU4ld7nGF8OQ14oc/we5rEntLCUa7+jrn3nn83BosfwZA0wb4pon2o8iQ==
 
-ajv@^6.10.0, ajv@^6.12.4, ajv@^6.12.6:
+ajv@^6.12.4, ajv@^6.12.6:
   version "6.12.6"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.6.tgz#baf5a62e802b07d977034586f8c3baf5adf26df4"
   integrity sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==
@@ -3062,10 +3067,10 @@ [email protected], eslint-scope@^5.1.1:
     esrecurse "^4.3.0"
     estraverse "^4.1.1"
 
-eslint-scope@^7.2.0:
-  version "7.2.0"
-  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-7.2.0.tgz#f21ebdafda02352f103634b96dd47d9f81ca117b"
-  integrity sha512-DYj5deGlHBfMt15J7rdtyKNq/Nqlv5KfU4iodrQ019XESsRnwXH9KAE0y3cwtUHDo2ob7CypAnCqefh6vioWRw==
+eslint-scope@^7.2.2:
+  version "7.2.2"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-7.2.2.tgz#deb4f92563390f32006894af62a22dba1c46423f"
+  integrity sha512-dOt21O7lTMhDM+X9mB4GX+DZrZtCUJPL/wlcTqxyrx5IvO0IYtILdtrQGQp+8n5S0gwSVmOf9NQrjMOgfQZlIg==
   dependencies:
     esrecurse "^4.3.0"
     estraverse "^5.2.0"
@@ -3099,27 +3104,33 @@ eslint-visitor-keys@^3.3.0, eslint-visitor-keys@^3.4.1:
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-3.4.1.tgz#c22c48f48942d08ca824cc526211ae400478a994"
   integrity sha512-pZnmmLwYzf+kWaM/Qgrvpen51upAktaaiI01nsJD/Yr3lMOdNtq0cxkrrg16w64VtisN6okbs7Q8AfGqj4c9fA==
 
-eslint@^8.20.0:
-  version "8.44.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-8.44.0.tgz#51246e3889b259bbcd1d7d736a0c10add4f0e500"
-  integrity sha512-0wpHoUbDUHgNCyvFB5aXLiQVfK9B0at6gUvzy83k4kAsQ/u769TQDX6iKC+aO4upIHO9WSaA3QoXYQDHbNwf1A==
+eslint-visitor-keys@^3.4.3:
+  version "3.4.3"
+  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-3.4.3.tgz#0cd72fe8550e3c2eae156a96a4dddcd1c8ac5800"
+  integrity sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag==
+
+eslint@^8.55.0:
+  version "8.55.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-8.55.0.tgz#078cb7b847d66f2c254ea1794fa395bf8e7e03f8"
+  integrity sha512-iyUUAM0PCKj5QpwGfmCAG9XXbZCWsqP/eWAWrG/W0umvjuLRBECwSFdt+rCntju0xEH7teIABPwXpahftIaTdA==
   dependencies:
     "@eslint-community/eslint-utils" "^4.2.0"
-    "@eslint-community/regexpp" "^4.4.0"
-    "@eslint/eslintrc" "^2.1.0"
-    "@eslint/js" "8.44.0"
-    "@humanwhocodes/config-array" "^0.11.10"
+    "@eslint-community/regexpp" "^4.6.1"
+    "@eslint/eslintrc" "^2.1.4"
+    "@eslint/js" "8.55.0"
+    "@humanwhocodes/config-array" "^0.11.13"
     "@humanwhocodes/module-importer" "^1.0.1"
     "@nodelib/fs.walk" "^1.2.8"
-    ajv "^6.10.0"
+    "@ungap/structured-clone" "^1.2.0"
+    ajv "^6.12.4"
     chalk "^4.0.0"
     cross-spawn "^7.0.2"
     debug "^4.3.2"
     doctrine "^3.0.0"
     escape-string-regexp "^4.0.0"
-    eslint-scope "^7.2.0"
-    eslint-visitor-keys "^3.4.1"
-    espree "^9.6.0"
+    eslint-scope "^7.2.2"
+    eslint-visitor-keys "^3.4.3"
+    espree "^9.6.1"
     esquery "^1.4.2"
     esutils "^2.0.2"
     fast-deep-equal "^3.1.3"
@@ -3129,7 +3140,6 @@ eslint@^8.20.0:
     globals "^13.19.0"
     graphemer "^1.4.0"
     ignore "^5.2.0"
-    import-fresh "^3.0.0"
     imurmurhash "^0.1.4"
     is-glob "^4.0.0"
     is-path-inside "^3.0.3"
@@ -3141,7 +3151,6 @@ eslint@^8.20.0:
     natural-compare "^1.4.0"
     optionator "^0.9.3"
     strip-ansi "^6.0.1"
-    strip-json-comments "^3.1.0"
     text-table "^0.2.0"
 
 espree@^9.6.0:
@@ -3153,6 +3162,15 @@ espree@^9.6.0:
     acorn-jsx "^5.3.2"
     eslint-visitor-keys "^3.4.1"
 
+espree@^9.6.1:
+  version "9.6.1"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-9.6.1.tgz#a2a17b8e434690a5432f2f8018ce71d331a48c6f"
+  integrity sha512-oruZaFkjorTpF32kDSI5/75ViwGeZginGGy2NoOSg3Q9bnwlnmDm4HLnkl0RE3n+njDXR037aY1+x58Z/zFdwQ==
+  dependencies:
+    acorn "^8.9.0"
+    acorn-jsx "^5.3.2"
+    eslint-visitor-keys "^3.4.1"
+
 esprima@^4.0.0, esprima@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
@@ -3852,7 +3870,7 @@ ignore@^5.0.5, ignore@^5.1.1, ignore@^5.2.0, ignore@~5.2.4:
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-5.2.4.tgz#a291c0c6178ff1b960befe47fcdec301674a6324"
   integrity sha512-MAb38BcSbH0eHNBxn7ql2NH/kX33OkB3lZ1BNdh7ENeRChHTYsTvWrMubiIAMNS2llXEEgZ1MUOBtXChP3kaFQ==
 
-import-fresh@^3.0.0, import-fresh@^3.2.1:
+import-fresh@^3.2.1:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/import-fresh/-/import-fresh-3.3.0.tgz#37162c25fcb9ebaa2e6e53d5b4d88ce17d9e0c2b"
   integrity sha512-veYYhQa+D1QBKznvhUHxb8faxlrwUnxseDAbAp457E0wLNio2bOSKnjYDhMj+YiAq61xrMGhQk9iXVk5FzgQMw==
@@ -6907,7 +6925,7 @@ [email protected]:
   dependencies:
     lru-cache "^6.0.0"
 
-semver@^6.0.0, semver@^6.1.0, semver@^6.3.0:
+semver@^6.0.0, semver@^6.1.0, semver@^6.3.0, semver@^6.3.1:
   version "6.3.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.1.tgz#556d2ef8689146e46dcea4bfdd095f3434dffcb4"
   integrity sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==
@@ -7280,7 +7298,7 @@ strip-indent@^3.0.0:
   dependencies:
     min-indent "^1.0.0"
 
-strip-json-comments@^3.1.0, strip-json-comments@^3.1.1, strip-json-comments@~3.1.1:
+strip-json-comments@^3.1.1, strip-json-comments@~3.1.1:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-3.1.1.tgz#31f1281b3832630434831c310c01cccda8cbe006"
   integrity sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==