Upgrades Eslint to v9 (#6694)

## What's the problem this PR addresses?

We're still relying on ESLint 8, which isn't supported anymore.

Fixes #6687, #6689

Supercedes #6693

## How did you fix it?

This PR upgrades ESLint to its latest version, switching to the
stylistic rules when needed. No rules were removed.

## Checklist

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tested. -->
<!--- This checklist exists to help you remember doing the chores when
you submit a PR. -->
<!--- Put an `x` in all the boxes that apply. -->
- [x] I have read the [Contributing
Guide](https://yarnpkg.com/advanced/contributing).

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https://yarnpkg.com/advanced/contributing#preparing-your-pr-to-be-released
for more details. -->
<!-- Check with `yarn version check` and fix with `yarn version check
-i` -->
- [x] I have set the packages that need to be released for my changes to
be effective.

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- [x] I will check that all automated PR checks pass before the PR gets
reviewed.

Author: arcanis

.pnp.cjs

@@ -0,0 +1,30 @@
+releases:
+  "@yarnpkg/eslint-config": major
+
+declined:
+  - "@yarnpkg/plugin-constraints"
+  - "@yarnpkg/plugin-essentials"
+  - "@yarnpkg/plugin-git"
+  - "@yarnpkg/plugin-github"
+  - "@yarnpkg/plugin-interactive-tools"
+  - "@yarnpkg/plugin-nm"
+  - "@yarnpkg/plugin-npm"
+  - "@yarnpkg/plugin-npm-cli"
+  - "@yarnpkg/plugin-patch"
+  - "@yarnpkg/plugin-pnp"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-typescript"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - vscode-zipfs
+  - "@yarnpkg/core"
+  - "@yarnpkg/extensions"
+  - "@yarnpkg/fslib"
+  - "@yarnpkg/libui"
+  - "@yarnpkg/libzip"
+  - "@yarnpkg/nm"
+  - "@yarnpkg/parsers"
+  - "@yarnpkg/pnp"
+  - "@yarnpkg/pnpify"
+  - "@yarnpkg/sdks"
+  - "@yarnpkg/shell"

.yarn/cache/@eslint-community-regexpp-npm-4.10.0-6bfb984c81-8c36169c81.zip

@@ -20,7 +20,7 @@
     "@yarnpkg/sdks": "workspace:^",
     "clipanion": "^4.0.0-rc.2",
     "esbuild": "npm:esbuild-wasm@^0.23.0",
-    "eslint": "^8.57.0",
+    "eslint": "^9.20.1",
     "jest": "^29.2.1",
     "pirates": "^4.0.5",
     "tslib": "^2.4.0",

.yarn/cache/@eslint-community-regexpp-npm-4.12.1-ef4ab5217e-c08f1dd7dd.zip

@@ -72,7 +72,7 @@ export const readSyml = async (source: PortablePath): Promise<any> => {
 
   try {
     return parseSyml(fileContent);
-  } catch (error) {
+  } catch {
     throw new Error(`Invalid syml file (${source})`);
   }
 };

.yarn/cache/@eslint-config-array-npm-0.19.2-9310e910a9-a680972090.zip

@@ -26,7 +26,7 @@ export const mtme = (
 
   if (typeof fn !== `function`) {
     throw new Error(
-      // eslint-disable-next-line
+
       `Invalid test function (got ${typeof fn}) - you probably put the closing parenthesis of the "makeTemporaryEnv" utility at the wrong place`,
     );
   }

.yarn/cache/@eslint-core-npm-0.10.0-33fca4886d-de41d7fa5d.zip

@@ -319,7 +319,7 @@ const packageServerUrls: {
   https: Promise<string> | null;
 } = {http: null, https: null};
 
-export const startPackageServer = ({type}: { type: keyof typeof packageServerUrls } = {type: `http`}): Promise<string> => {
+export const startPackageServer = ({type}: {type: keyof typeof packageServerUrls} = {type: `http`}): Promise<string> => {
   const serverUrl = packageServerUrls[type];
   if (serverUrl !== null)
     return serverUrl;
@@ -474,7 +474,7 @@ export const startPackageServer = ({type}: { type: keyof typeof packageServerUrl
         let body;
         try {
           body = JSON.parse(rawData);
-        } catch (e) {
+        } catch {
           return processError(response, 401, `Unauthorized`);
         }
 
@@ -507,7 +507,7 @@ export const startPackageServer = ({type}: { type: keyof typeof packageServerUrl
         let body;
         try {
           body = JSON.parse(rawData);
-        } catch (e) {
+        } catch {
           return processError(response, 401, `Invalid`);
         }
 
@@ -537,7 +537,7 @@ export const startPackageServer = ({type}: { type: keyof typeof packageServerUrl
         let body;
         try {
           body = JSON.parse(rawData);
-        } catch (e) {
+        } catch {
           return processError(response, 401, `Invalid`);
         }
 
@@ -774,7 +774,6 @@ export const generatePkgDriver = ({
 
       if (typeof fn !== `function`) {
         throw new Error(
-          // eslint-disable-next-line
           `Invalid test function (got ${typeof fn}) - you probably put the closing parenthesis of the "makeTemporaryEnv" utility at the wrong place`,
         );
       }
@@ -919,7 +918,7 @@ export const getHttpsCertificates = async () => {
   if (httpsCertificates)
     return httpsCertificates;
 
-  const createCSR = promisify<pem.CSRCreationOptions, { csr: string, clientKey: string }>(pem.createCSR);
+  const createCSR = promisify<pem.CSRCreationOptions, {csr: string, clientKey: string}>(pem.createCSR);
   const createCertificate = promisify<pem.CertificateCreationOptions, pem.CertificateCreationResult>(pem.createCertificate);
 
   const {csr, clientKey} = await createCSR({commonName: `yarn`});

.yarn/cache/@eslint-core-npm-0.11.0-38ee7b6834-0a055edf51.zip

@@ -144,7 +144,7 @@ describe(`Basic tests`, () => {
 
             await expect(
               source(
-                // eslint-disable-next-line
+
                 `require('dep-loop-entry') === require('dep-loop-entry').dependencies['dep-loop-exit'].dependencies['dep-loop-entry']`,
               ),
             );

.yarn/cache/@eslint-eslintrc-npm-2.1.4-1ff4b5f908-7a3b14f4b4.zip

@@ -69,7 +69,7 @@ function cleanupJsonOutput(output: string, path: PortablePath, homePath: Portabl
   let outputObject;
   try {
     outputObject = JSON.parse(output);
-  } catch (e) {
+  } catch {
     return cleanupPlainOutput(output, path, homePath);
   }
 

.yarn/cache/@eslint-eslintrc-npm-3.2.0-1f7efe7868-b32dd90ce7.zip

@@ -23,7 +23,7 @@ export type Assertions = {
   fail?: Array<[/*request: */string, {message: string, code: string, pnpCode?: string}]>;
 };
 
-export function makeTemporaryExportsEnv(testPackageName: string, manifest: Omit<Manifest, 'name'>, files: Array<string>, {pass, fail}: Assertions) {
+export function makeTemporaryExportsEnv(testPackageName: string, manifest: Omit<Manifest, `name`>, files: Array<string>, {pass, fail}: Assertions) {
   return makeTemporaryEnv({
     dependencies: {
       [testPackageName]: `file:./${testPackageName}`,

.yarn/cache/@eslint-js-npm-8.57.0-00ead3710a-3c501ce8a9.zip

@@ -168,14 +168,14 @@ describe(`Features`, () => {
             seq: 1,
             type: `request`,
             command: `typeDefinition`,
-            arguments: {file: ourUtilityFile, line: 7, offset: 9},
+            arguments: {file: ourUtilityFile, line: 5, offset: 9},
           });
 
           await runAndWait(yarnpkgCli, {
             seq: 2,
             type: `request`,
             command: `typeDefinition`,
-            arguments: {file: ourUtilityFile, line: 6, offset: 9},
+            arguments: {file: ourUtilityFile, line: 4, offset: 9},
           });
         } finally {
           child.stdin.end();

.yarn/cache/@eslint-js-npm-9.20.0-86701063ff-2304cd7257.zip

@@ -1,5 +1,3 @@
-/* eslint-disable */
-
 // This file MUST NOT CHANGE. We're using it for the VSCode / TS integration
 // tests, which require to reference symbols by their offset.
 

.yarn/cache/@eslint-object-schema-npm-2.1.4-0546250476-221e8d9f28.zip .yarn/cache/@eslint-object-schema-npm-2.1.6-a777ee59e8-266085c8d3.zip

@@ -18,7 +18,7 @@ const loader = jiti(__filename, {
   requireCache: false,
 });
 
-const binaries: Array<{ name: string, getCli: () => Promise<Cli<BaseContext>>, watch: Array<string> }> = [
+const binaries: Array<{name: string, getCli: () => Promise<Cli<BaseContext>>, watch: Array<string>}> = [
   {
     name: `@yarnpkg/cli`,
     getCli: async () => {

.yarn/cache/@eslint-plugin-kit-npm-0.2.5-aeb42dfdc6-82d0142bc7.zip

@@ -133,7 +133,7 @@ const makeCommandLine = (line: string, cli: YarnCli) => {
 const makeCommandOrRawLine = (line: string, cli: YarnCli) => {
   try {
     return makeCommandLine(line, cli);
-  } catch (err: any) {
+  } catch {
     console.log(`Failed to parse "${line}"`);
     return makeRawLine(line);
   }

.yarn/cache/@humanfs-core-npm-0.19.1-e2e7aaeb6e-270d936be4.zip

@@ -96,7 +96,7 @@ async function typedocPluginConfig(): Promise<Partial<DocusaurusPluginTypeDocApi
   };
 }
 
-async function getPreviousVersions(): Promise<Array<{ label: string, href: string }>> {
+async function getPreviousVersions(): Promise<Array<{label: string, href: string}>> {
   const [npmResponse, repoResponse] = await Promise.all([
     // eslint-disable-next-line no-restricted-globals
     fetch(`https://registry.npmjs.org/yarn`, {headers: {accept: `application/vnd.npm.install-v1+json`}})

.yarn/cache/@humanfs-node-npm-0.16.6-6ee2cad587-6d43c67274.zip

@@ -61,7 +61,7 @@ export type PackageListingError =
 
 export type WithErrors<T, TError extends {type: string}> =
   | (T & {error?: null})
-  | { error: TError };
+  | {error: TError};
 
 export type PackageInfoQuery = ReturnType<typeof usePackageInfo>;
 export type ReleaseInfoQuery = ReturnType<typeof useReleaseInfo>;

.yarn/cache/@humanwhocodes-config-array-npm-0.11.14-94a02fcc87-3ffb24ecdf.zip

@@ -1,4 +1,3 @@
-/* eslint-disable no-undef */
 import {useLocation}                                 from '@docusaurus/router';
 import {useDocsSidebar}                              from '@docusaurus/theme-common/internal';
 import BackToTopButton                               from '@theme/BackToTopButton';

.yarn/cache/@humanwhocodes-object-schema-npm-2.0.3-4f0e508cd9-05bb99ed06.zip

@@ -8,11 +8,14 @@
     "./react": "./react.js"
   },
   "dependencies": {
-    "@typescript-eslint/eslint-plugin": "^7.8.0",
-    "@typescript-eslint/parser": "^7.8.0",
+    "@stylistic/eslint-plugin": "^3.1.0",
+    "@stylistic/eslint-plugin-jsx": "^3.1.0",
+    "@typescript-eslint/eslint-plugin": "^8.24.0",
+    "@typescript-eslint/parser": "^8.24.0",
     "eslint-plugin-arca": "^0.16.0",
-    "eslint-plugin-react": "^7.34.1",
-    "globals": "^15.1.0"
+    "eslint-plugin-react": "^7.37.4",
+    "globals": "^15.15.0",
+    "tslib": "^2.4.0"
   },
   "peerDependencies": {
     "eslint": "*",
@@ -32,7 +35,8 @@
     "node": ">=18.12.0"
   },
   "devDependencies": {
-    "eslint": "^8.57.0"
+    "eslint": "^9.20.1",
+    "typescript": "^5.5.2"
   },
   "stableVersion": "2.1.0"
 }

.yarn/cache/@humanwhocodes-retry-npm-0.3.1-9d87bf92c6-eb457f6995.zip

@@ -1,5 +1,7 @@
-import typescriptEslint from '@typescript-eslint/eslint-plugin';
-import arcaEslint       from 'eslint-plugin-arca';
+import stylisticJsxEslint from '@stylistic/eslint-plugin-jsx';
+import stylisticEslint    from '@stylistic/eslint-plugin';
+import typescriptEslint   from '@typescript-eslint/eslint-plugin';
+import arcaEslint         from 'eslint-plugin-arca';
 
 // eslint-disable-next-line arca/no-default-export
 export default [
@@ -9,29 +11,31 @@ export default [
     plugins: {
       [`arca`]: arcaEslint,
       [`@typescript-eslint`]: typescriptEslint,
+      [`@stylistic`]: stylisticEslint,
+      [`@stylistic-jsx`]: stylisticJsxEslint,
     },
 
     rules: {
       '@typescript-eslint/array-type': [`error`, {
         default: `generic`,
       }],
 
-      '@typescript-eslint/brace-style': 2,
+      '@stylistic/brace-style': 2,
 
-      '@typescript-eslint/comma-dangle': [`error`, `always-multiline`],
+      '@stylistic/comma-dangle': [`error`, `always-multiline`],
 
-      '@typescript-eslint/keyword-spacing': 2,
+      '@stylistic/keyword-spacing': 2,
 
-      '@typescript-eslint/comma-spacing': 2,
+      '@stylistic/comma-spacing': 2,
 
-      '@typescript-eslint/func-call-spacing': 2,
+      '@stylistic/func-call-spacing': 2,
 
-      '@typescript-eslint/indent': [`error`, 2, {
+      '@stylistic/indent': [`error`, 2, {
         SwitchCase: 1,
         ignoredNodes: [`TSTypeParameterInstantiation`],
       }],
 
-      '@typescript-eslint/member-delimiter-style': [`error`, {
+      '@stylistic/member-delimiter-style': [`error`, {
         multiline: {
           delimiter: `semi`,
           requireLast: true,
@@ -53,13 +57,13 @@ export default [
         },
       }],
 
-      '@typescript-eslint/quotes': [`error`, `backtick`],
+      '@stylistic/quotes': [`error`, `backtick`],
 
-      '@typescript-eslint/semi': 2,
+      '@stylistic/semi': 2,
 
-      '@typescript-eslint/space-infix-ops': 2,
+      '@stylistic/space-infix-ops': 2,
 
-      '@typescript-eslint/type-annotation-spacing': 2,
+      '@stylistic/type-annotation-spacing': 2,
 
       'arca/import-quotes': 2,
 
@@ -77,50 +81,50 @@ export default [
         enableOnelinerSections: true,
       }],
 
-      'array-bracket-spacing': 2,
+      '@stylistic/array-bracket-spacing': 2,
 
-      'arrow-parens': [`error`, `as-needed`],
+      '@stylistic/arrow-parens': [`error`, `as-needed`],
 
-      'arrow-spacing': 2,
+      '@stylistic/arrow-spacing': 2,
 
-      'computed-property-spacing': 2,
+      '@stylistic/computed-property-spacing': 2,
 
-      'eol-last': [`error`, `always`],
+      '@stylistic/eol-last': [`error`, `always`],
 
-      'generator-star-spacing': [`error`, {
+      '@stylistic/generator-star-spacing': [`error`, {
         before: true,
         after: true,
       }],
 
-      'jsx-quotes': 2,
+      '@stylistic/jsx-quotes': 2,
 
-      'key-spacing': 2,
+      '@stylistic/key-spacing': 2,
 
-      'no-extra-semi': 2,
+      '@stylistic/no-extra-semi': 2,
 
       'no-irregular-whitespace': 2,
 
-      'no-mixed-spaces-and-tabs': 2,
+      '@stylistic/no-mixed-spaces-and-tabs': 2,
 
-      'no-multiple-empty-lines': [`error`, {max: 2, maxBOF: 0, maxEOF: 0}],
+      '@stylistic/no-multiple-empty-lines': [`error`, {max: 2, maxBOF: 0, maxEOF: 0}],
 
-      'no-tabs': 2,
+      '@stylistic/no-tabs': 2,
 
-      'no-trailing-spaces': 2,
+      '@stylistic/no-trailing-spaces': 2,
 
-      'object-curly-spacing': 2,
+      '@stylistic/object-curly-spacing': 2,
 
-      'padded-blocks': [`error`, `never`],
+      '@stylistic/padded-blocks': [`error`, `never`],
 
-      'quote-props': [`error`, `as-needed`],
+      '@stylistic/quote-props': [`error`, `as-needed`],
 
-      'rest-spread-spacing': 2,
+      '@stylistic/rest-spread-spacing': 2,
 
-      'space-before-blocks': 2,
+      '@stylistic/space-before-blocks': 2,
 
-      'space-in-parens': 2,
+      '@stylistic/space-in-parens': 2,
 
-      'template-curly-spacing': 2,
+      '@stylistic/template-curly-spacing': 2,
     },
   },
 ];

.yarn/cache/@humanwhocodes-retry-npm-0.4.1-44b0ee0d64-39fafc7319.zip

@@ -37,7 +37,7 @@ module.exports = function (_, opts) {
     let manifestPath;
     try {
       manifestPath = api.resolveToUnqualified(`${parts[1]}/package.json`, basedir, {considerBuiltins: false});
-    } catch (err) {
+    } catch {
       return null;
     }
 

.yarn/cache/@stylistic-eslint-plugin-jsx-npm-3.1.0-02898809b5-383570ebb1.zip

@@ -6,7 +6,7 @@ import getPath                from 'lodash/get';
 import pl                     from 'tau-prolog';
 import vm                     from 'vm';
 
-// eslint-disable-next-line @typescript-eslint/naming-convention
+
 const {is_atom: isAtom, is_variable: isVariable, is_instantiated_list: isInstantiatedList} = pl.type;
 
 function prependGoals(thread: pl.type.Thread, point: pl.type.State, goals: Array<pl.type.Term<number, string>>): void {

.yarn/cache/@stylistic-eslint-plugin-npm-3.1.0-c98802bbe4-1fc20b0294.zip

@@ -229,7 +229,7 @@ export default class InfoCommand extends BaseCommand {
     const fetcher = configuration.makeFetcher();
     const fetcherOptions: FetchOptions = {project, fetcher, cache, checksums: project.storedChecksums, report: new ThrowReport(), cacheOptions: {skipIntegrityCheck: true}};
 
-    const builtinInfoBuilders: Array<Exclude<Hooks['fetchPackageInfo'], undefined>> = [
+    const builtinInfoBuilders: Array<Exclude<Hooks[`fetchPackageInfo`], undefined>> = [
       // Manifest fields
       async (pkg, extra, registerData) => {
         if (!extra.has(`manifest`))