chore: migrate ESLint configs to flat config (#14094)

* chore: migrate ESLint configs to flat config

* fix: update paths

* fix: frontend lint fails

* refactor(misskey-js): lint build.js

.github/workflows/lint.yml

@@ -10,14 +10,14 @@ on:
       - packages/frontend/**
       - packages/sw/**
       - packages/misskey-js/**
-      - packages/shared/.eslintrc.js
+      - packages/shared/eslint.config.js
   pull_request:
     paths:
       - packages/backend/**
       - packages/frontend/**
       - packages/sw/**
       - packages/misskey-js/**
-      - packages/shared/.eslintrc.js
+      - packages/shared/eslint.config.js
 
 jobs:
   pnpm_install:

package.json

@@ -61,12 +61,14 @@
 		"glob": "10.3.12"
 	},
 	"devDependencies": {
+		"@misskey-dev/eslint-plugin": "2.0.2",
 		"@types/node": "20.14.7",
 		"@typescript-eslint/eslint-plugin": "7.13.1",
 		"@typescript-eslint/parser": "7.13.1",
 		"cross-env": "7.0.3",
 		"cypress": "13.12.0",
 		"eslint": "9.5.0",
+		"globals": "15.6.0",
 		"ncp": "2.0.0",
 		"start-server-and-test": "2.0.4"
 	},

packages/backend/eslint.config.js

@@ -0,0 +1,46 @@
+import tsParser from '@typescript-eslint/parser';
+import sharedConfig from '../shared/eslint.config.js';
+
+export default [
+	...sharedConfig,
+	{
+		ignores: ['**/node_modules', 'built', '@types/**/*'],
+	},
+	{
+		files: ['**/*.ts', '**/*.tsx'],
+		languageOptions: {
+			parserOptions: {
+				parser: tsParser,
+				project: ['./tsconfig.json', './test/tsconfig.json'],
+				sourceType: 'module',
+				tsconfigRootDir: import.meta.dirname,
+			},
+		},
+		rules: {
+			'import/order': ['warn', {
+				groups: [
+					'builtin',
+					'external',
+					'internal',
+					'parent',
+					'sibling',
+					'index',
+					'object',
+					'type',
+				],
+				pathGroups: [{
+					pattern: '@/**',
+					group: 'external',
+					position: 'after',
+				}],
+			}],
+			'no-restricted-globals': ['error', {
+				name: '__dirname',
+				message: 'Not in ESModule. Use `import.meta.url` instead.',
+			}, {
+				name: '__filename',
+				message: 'Not in ESModule. Use `import.meta.url` instead.',
+			}],
+		},
+	},
+];

packages/backend/package.json

@@ -186,7 +186,6 @@
 	},
 	"devDependencies": {
 		"@jest/globals": "29.7.0",
-		"@misskey-dev/eslint-plugin": "1.0.0",
 		"@nestjs/platform-express": "10.3.9",
 		"@simplewebauthn/types": "10.0.0",
 		"@swc/jest": "0.2.36",
@@ -231,7 +230,6 @@
 		"@typescript-eslint/parser": "7.13.1",
 		"aws-sdk-client-mock": "4.0.1",
 		"cross-env": "7.0.3",
-		"eslint": "9.5.0",
 		"eslint-plugin-import": "2.29.1",
 		"execa": "9.2.0",
 		"fkill": "9.0.0",

packages/backend/test-server/eslint.config.js

@@ -0,0 +1,43 @@
+import tsParser from '@typescript-eslint/parser';
+import sharedConfig from '../../shared/eslint.config.js';
+
+export default [
+	...sharedConfig,
+	{
+		files: ['**/*.ts', '**/*.tsx'],
+		languageOptions: {
+			parserOptions: {
+				parser: tsParser,
+				project: ['./tsconfig.json'],
+				sourceType: 'module',
+				tsconfigRootDir: import.meta.dirname,
+			},
+		},
+		rules: {
+			'import/order': ['warn', {
+				groups: [
+					'builtin',
+					'external',
+					'internal',
+					'parent',
+					'sibling',
+					'index',
+					'object',
+					'type',
+				],
+				pathGroups: [{
+					pattern: '@/**',
+					group: 'external',
+					position: 'after',
+				}],
+			}],
+			'no-restricted-globals': ['error', {
+				name: '__dirname',
+				message: 'Not in ESModule. Use `import.meta.url` instead.',
+			}, {
+				name: '__filename',
+				message: 'Not in ESModule. Use `import.meta.url` instead.',
+			}],
+		},
+	},
+];

packages/backend/test/eslint.config.js

@@ -0,0 +1,22 @@
+import globals from 'globals';
+import tsParser from '@typescript-eslint/parser';
+import sharedConfig from '../../shared/eslint.config.js';
+
+export default [
+	...sharedConfig,
+	{
+		files: ['**/*.ts', '**/*.tsx'],
+		languageOptions: {
+			globals: {
+				...globals.node,
+				...globals.jest,
+			},
+			parserOptions: {
+				parser: tsParser,
+				project: ['./tsconfig.json'],
+				sourceType: 'module',
+				tsconfigRootDir: import.meta.dirname,
+			},
+		},
+	},
+];