build: set up linter (#6)

Author: AriPerkkio

.github/workflows/ci.yml

@@ -25,4 +25,4 @@ jobs:
         run: pnpm install --frozen-lockfile --prefer-offline
 
       - name: lint
-        run: echo "TODO"
+        run: pnpm lint

eslint.config.mjs

@@ -0,0 +1,13 @@
+import blitzPlugin from "@blitz/eslint-plugin";
+import { jsFileExtensions } from "@blitz/eslint-plugin/dist/configs/javascript.js";
+import { tsFileExtensions } from "@blitz/eslint-plugin/dist/configs/typescript.js";
+
+export default [
+  { ignores: ["**/dist", "**/node_modules", ".cache", "workspace/**"] },
+
+  ...blitzPlugin.configs.recommended(),
+
+  {
+    files: [...tsFileExtensions, ...jsFileExtensions],
+  },
+];

package.json

@@ -15,7 +15,8 @@
   "homepage": "https://github.com/stackblitz/webcontainers-ecosystem-ci#readme",
   "scripts": {
     "tsx": "tsx",
-    "test": "tsx src/index.ts"
+    "test": "tsx src/index.ts",
+    "lint": "eslint --cache --cache-location ./node_modules/.cache/eslint ."
   },
   "dependencies": {
     "@actions/core": "^1.11.1",
@@ -24,7 +25,12 @@
     "tinyexec": "^1.0.1"
   },
   "devDependencies": {
+    "@blitz/eslint-plugin": "^0.1.4",
     "@types/node": "^22.15.3",
-    "tsx": "^4.19.3"
-  }
+    "eslint": "^9.26.0",
+    "prettier": "^3.5.3",
+    "tsx": "^4.19.3",
+    "typescript": "^5.8.3"
+  },
+  "prettier": {}
 }