chore: ESLint 9への移行 (#DTB-2203) (#24)

eslint.config.js

@@ -0,0 +1,40 @@
+// @ts-check
+import eslint from "@eslint/js";
+import eslintPluginPrettierRecommended from "eslint-plugin-prettier/recommended";
+import simpleImportSort from "eslint-plugin-simple-import-sort";
+import tseslint from "typescript-eslint";
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.strictTypeChecked,
+  ...tseslint.configs.stylisticTypeChecked,
+  {
+    languageOptions: {
+      parserOptions: {
+        project: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  {
+    plugins: {
+      "@typescript-eslint": tseslint.plugin,
+    },
+    rules: {
+      "@typescript-eslint/consistent-type-imports": "error",
+      "@typescript-eslint/no-import-type-side-effects": "error",
+      "@typescript-eslint/no-confusing-void-expression": "off",
+      "@typescript-eslint/restrict-template-expressions": "off",
+    },
+  },
+  {
+    plugins: {
+      "simple-import-sort": simpleImportSort,
+    },
+    rules: {
+      "simple-import-sort/imports": "error",
+      "simple-import-sort/exports": "error",
+    },
+  },
+  eslintPluginPrettierRecommended, //  Make sure to put it last, so it gets the chance to override other configs.
+);

package.json

@@ -17,19 +17,20 @@
     "buildpush:dev": " pnpm run build && cp appsscript.json build/appsscript.json && clasp_config_project=.clasp.dev.json clasp push --force",
     "postinstall": "mkdir -p build && cp appsscript.json build/appsscript.json"
   },
-  "dependencies": {},
   "devDependencies": {
+    "@eslint/js": "^9.4.0",
     "@google/clasp": "^2.4.2",
+    "@types/eslint__js": "^8.42.3",
     "@types/google-apps-script": "^1.0.83",
-    "@typescript-eslint/eslint-plugin": "^7.7.1",
-    "@typescript-eslint/parser": "^7.7.1",
     "esbuild": "^0.20.2",
     "esbuild-gas-plugin": "^0.8.0",
-    "eslint": "^8.56.0",
+    "eslint": "^9.4.0",
     "eslint-config-prettier": "^9.1.0",
-    "eslint-plugin-import": "^2.29.1",
+    "eslint-plugin-prettier": "^5.1.3",
+    "eslint-plugin-simple-import-sort": "^12.1.0",
     "prettier": "^3.2.5",
-    "typescript": "^5.4.5"
+    "typescript": "^5.4.5",
+    "typescript-eslint": "^7.12.0"
   },
   "packageManager": "pnpm@9.2.0+sha512.98a80fd11c2e7096747762304106432b3ddc67dcf54b5a8c01c93f68a2cd5e05e6821849522a06fb76284d41a2660d5e334f2ee3bbf29183bf2e739b1dafa771"
 }