Migrate to ESLint to v9

.github/workflows/node.js.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest, windows-latest, macos-latest]
-        node-version: [20.x, 22.x]
+        node-version: [22.x, 23.x]
 
     runs-on: ${{ matrix.platform }}
 

build-src.ts

@@ -26,10 +26,10 @@ const removeFromPackageJson = [
 	// devDependencies
 	"@types/better-sqlite3", "@types/cloud-env", "@types/node", "@types/node-static", "@types/nodemailer", "@types/pg", "@types/sockjs",
 		"@typescript-eslint/eslint-plugin", "@typescript-eslint/parser", "eslint", "eslint-plugin-import", "husky", "mocha", "smogon",
-		"typescript",
+		"typescript", "typescript-eslint",
 ];
 const overrideVersions: Dict<string> = {
-	"esbuild": "0.23.0",
+	"esbuild": "0.24.0",
 };
 
 function getPokemonShowdownFolder(): string {

eslint.config.mjs

@@ -0,0 +1,67 @@
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config({
+    extends: [
+        eslint.configs.recommended,
+        tseslint.configs.strictTypeChecked,
+        tseslint.configs.stylisticTypeChecked,
+        {
+            languageOptions: {
+                parserOptions: {
+                    projectService: true,
+                    tsconfigRootDir: import.meta.dirname,
+                },
+            },
+        },
+    ],
+    files: [
+        "**/*.ts",
+        "**/*.tsx"
+    ],
+    rules: {
+        "@typescript-eslint/prefer-optional-chain": "off",
+        "@typescript-eslint/prefer-nullish-coalescing": "off",
+        "@typescript-eslint/restrict-plus-operands": "off",
+        "@typescript-eslint/no-dynamic-delete": "off",
+        "@typescript-eslint/no-deprecated": "off",
+        "@typescript-eslint/use-unknown-in-catch-callback-variable": "off",
+        "@typescript-eslint/no-non-null-assertion": "off",
+        "@typescript-eslint/no-inferrable-types": "off",
+        "@typescript-eslint/no-confusing-void-expression": "off",
+        "@typescript-eslint/no-unnecessary-type-parameters": "off",
+        "@typescript-eslint/prefer-string-starts-ends-with": "off",
+        "@typescript-eslint/prefer-regexp-exec": "off",
+        "@typescript-eslint/no-empty-function": "off",
+        "@typescript-eslint/ban-ts-comment": ['error', {
+            'ts-check': true,
+            'ts-expect-error': false,
+            'ts-ignore': true,
+            'ts-nocheck': true,
+        }],
+        "@typescript-eslint/no-require-imports": ['error', {
+            allowAsImport: true
+        }]
+    }
+}, {
+    ignores: [
+        ".github/*",
+        ".vscode/*",
+        "archived-databases/*",
+        "build/*",
+        "client-data/*",
+        "data/*",
+        "databases/*",
+        "errors/*",
+        "game-debug-logs/*",
+        "Lanette-private/*",
+        "local-utils/*",
+        "pokemon-showdown/*",
+        "private-data/*",
+        "roomlogs/*",
+        "runtime-output/*",
+        "src/config.ts",
+        "src/local-scripts/*",
+        "web/*",
+    ]
+});

local-script.ts

@@ -13,6 +13,7 @@ module.exports = (async() => {
 	await initializeSrc();
 
 	const localScriptPath = path.join(getInputFolders().src.buildPath, "local-scripts", options.script + ".js");
+	// eslint-disable-next-line @typescript-eslint/no-require-imports
 	require(localScriptPath);
 })().catch((error) => {
 	console.error(error);