ESLint v9 (roblox-ts#2786)

Author: osyrisrblx

.eslintignore

@@ -1 +1,6 @@
 *.yml
+/out
+/node_modules
+/tests
+/.devcontainer
+/CHANGELOG.md

.eslintrc

@@ -1,6 +1,3 @@
 {
-	"recommendations": [
-		"dbaeumer.vscode-eslint",
-		"editorconfig.editorconfig",
-	]
+	"recommendations": ["dbaeumer.vscode-eslint", "esbenp.prettier-vscode", "editorconfig.editorconfig"]
 }

.prettierignore

@@ -1,9 +1,11 @@
 {
 	"[typescript]": {
-		"editor.defaultFormatter": "dbaeumer.vscode-eslint"
+		"editor.defaultFormatter": "esbenp.prettier-vscode"
 	},
 	"editor.formatOnSave": true,
-	"eslint.format.enable": true,
+	"eslint.options": {
+		"flags": ["unstable_ts_config"]
+	},
 	"files.eol": "\n",
 	"typescript.tsdk": "node_modules/typescript/lib",
 	"typescript.preferences.importModuleSpecifier": "non-relative",

.vscode/extensions.json

@@ -0,0 +1,70 @@
+import { FlatCompat } from "@eslint/eslintrc";
+import eslint from "@eslint/js";
+import comments from "@eslint-community/eslint-plugin-eslint-comments";
+import prettierConfig from "eslint-config-prettier";
+import prettierPlugin from "eslint-plugin-prettier";
+import simpleImportSort from "eslint-plugin-simple-import-sort";
+import tseslint from "typescript-eslint";
+
+const compat = new FlatCompat({ baseDirectory: __dirname });
+
+export default tseslint.config(
+	eslint.configs.recommended,
+	...tseslint.configs.recommended,
+	...compat.extends("plugin:prettier/recommended"),
+	prettierConfig,
+	{
+		languageOptions: {
+			parser: tseslint.parser,
+			parserOptions: {
+				ecmaVersion: "latest",
+				sourceType: "module",
+				project: ["./tsconfig.json", "./tsconfig.eslint.json", "./src/*/tsconfig.json"],
+				ecmaFeatures: { jsx: true },
+			},
+		},
+		plugins: {
+			"@typescript-eslint": tseslint.plugin,
+			prettier: prettierPlugin,
+			"simple-import-sort": simpleImportSort,
+			"eslint-comments": comments,
+		},
+		rules: {
+			// off
+			"@typescript-eslint/explicit-function-return-type": "off",
+			"@typescript-eslint/explicit-module-boundary-types": "off",
+			"@typescript-eslint/no-empty-function": "off",
+			"@typescript-eslint/no-empty-interface": "off",
+			"@typescript-eslint/no-namespace": "off",
+			"@typescript-eslint/no-non-null-assertion": "off",
+			"@typescript-eslint/no-use-before-define": "off",
+			"no-debugger": "off",
+			"no-extra-boolean-cast": "off",
+
+			// warn
+			"@typescript-eslint/no-unused-expressions": "warn",
+			"@typescript-eslint/no-unused-vars": "warn",
+			"eslint-comments/disable-enable-pair": ["warn", { allowWholeFile: true }],
+			"eslint-comments/no-unused-disable": "warn",
+			"eslint-comments/require-description": "warn",
+			"no-console": "warn",
+			"no-undef-init": "warn",
+			"prefer-const": ["warn", { destructuring: "all" }],
+			"prettier/prettier": "warn",
+			"simple-import-sort/exports": "warn",
+			"simple-import-sort/imports": "warn",
+			curly: ["warn", "multi-line", "consistent"],
+
+			// error
+			"@typescript-eslint/array-type": ["error", { default: "generic", readonly: "generic" }],
+			"@typescript-eslint/no-deprecated": "error",
+			"@typescript-eslint/no-floating-promises": ["error", { ignoreVoid: true }],
+			"@typescript-eslint/no-require-imports": "error",
+			"no-constant-condition": ["error", { checkLoops: false }],
+			"no-restricted-imports": ["error", { patterns: [".*"] }],
+		},
+	},
+	{
+		ignores: ["node_modules/", "tests/", "out/", "coverage/", "devlink/"],
+	},
+);