switch to ESM and update config wiring

.prettierrc.json

@@ -6,6 +6,5 @@
   "singleQuote": true,
   "trailingComma": "none",
   "bracketSpacing": false,
-  "arrowParens": "avoid",
-  "parser": "typescript"
+  "arrowParens": "avoid"
 }

dev.Dockerfile

@@ -3,10 +3,11 @@
 ARG NODE_VERSION=20
 
 FROM node:${NODE_VERSION}-alpine AS base
-RUN apk add --no-cache cpio findutils git
+RUN apk add --no-cache cpio findutils git rsync
 WORKDIR /src
 RUN --mount=type=bind,target=.,rw \
   --mount=type=cache,target=/src/.yarn/cache <<EOT
+  set -e
   corepack enable
   yarn --version
   yarn config set --home enableTelemetry 0
@@ -34,18 +35,27 @@ RUN --mount=type=bind,target=.,rw <<EOT
 EOT
 
 FROM deps AS build
-RUN --mount=type=bind,target=.,rw \
+RUN --mount=target=/context \
   --mount=type=cache,target=/src/.yarn/cache \
-  --mount=type=cache,target=/src/node_modules \
-  yarn run build && mkdir /out && cp -Rf dist /out/
+  --mount=type=cache,target=/src/node_modules <<EOT
+  set -e
+  rsync -a /context/. .
+  rm -rf dist
+  yarn run build
+  mkdir /out
+  cp -r dist /out
+EOT
 
 FROM scratch AS build-update
 COPY --from=build /out /
 
 FROM build AS build-validate
-RUN --mount=type=bind,target=.,rw <<EOT
+RUN --mount=target=/context \
+  --mount=target=.,type=tmpfs <<EOT
   set -e
+  rsync -a /context/. .
   git add -A
+  rm -rf dist
   cp -rf /out/* .
   if [ -n "$(git status --porcelain -- dist)" ]; then
     echo >&2 'ERROR: Build result differs. Please build first with "docker buildx bake build"'
@@ -56,9 +66,9 @@ EOT
 
 FROM deps AS format
 RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/.yarn/cache \
   --mount=type=cache,target=/src/node_modules \
-  yarn run format \
-  && mkdir /out && find . -name '*.ts' -not -path './node_modules/*' -not -path './.yarn/*' | cpio -pdm /out
+  yarn run format && mkdir /out && find . -name '*.ts' -not -path './node_modules/*' -not -path './.yarn/*' | cpio -pdm /out
 
 FROM scratch AS format-update
 COPY --from=format /out /

eslint.config.mjs

@@ -0,0 +1,36 @@
+import {defineConfig} from 'eslint/config';
+import js from '@eslint/js';
+import tseslint from '@typescript-eslint/eslint-plugin';
+import globals from 'globals';
+import eslintConfigPrettier from 'eslint-config-prettier/flat';
+import eslintPluginPrettier from 'eslint-plugin-prettier';
+
+export default defineConfig([
+  {
+    ignores: ['.yarn/**/*', 'dist/**/*']
+  },
+  js.configs.recommended,
+  ...tseslint.configs['flat/recommended'],
+  eslintConfigPrettier,
+  {
+    languageOptions: {
+      globals: {
+        ...globals.node
+      }
+    }
+  },
+  {
+    plugins: {
+      prettier: eslintPluginPrettier
+    },
+    rules: {
+      'prettier/prettier': 'error',
+      '@typescript-eslint/no-require-imports': [
+        'error',
+        {
+          allowAsImport: true
+        }
+      ]
+    }
+  }
+]);

package.json

@@ -1,15 +1,12 @@
 {
   "name": "github-runtime",
   "description": "GitHub Action to expose GitHub runtime to the workflow",
+  "type": "module",
   "main": "src/main.ts",
   "scripts": {
     "build": "ncc build src/main.ts --source-map --minify --license licenses.txt",
-    "lint": "yarn run prettier && yarn run eslint",
-    "format": "yarn run prettier:fix && yarn run eslint:fix",
-    "eslint": "eslint --max-warnings=0 .",
-    "eslint:fix": "eslint --fix .",
-    "prettier": "prettier --check \"./**/*.ts\"",
-    "prettier:fix": "prettier --write \"./**/*.ts\"",
+    "lint": "eslint --max-warnings=0 .",
+    "format": "eslint --fix .",
     "all": "yarn run build && yarn run format"
   },
   "repository": {
@@ -29,15 +26,16 @@
     "@actions/core": "^1.11.1"
   },
   "devDependencies": {
-    "@types/node": "^20.6.0",
-    "@typescript-eslint/eslint-plugin": "^6.6.0",
-    "@typescript-eslint/parser": "^6.6.0",
-    "@vercel/ncc": "^0.38.0",
-    "eslint": "^8.49.0",
-    "eslint-config-prettier": "^9.0.0",
-    "eslint-plugin-prettier": "^5.0.0",
-    "prettier": "^3.0.3",
-    "ts-node": "^10.9.1",
-    "typescript": "^5.2.2"
+    "@eslint/js": "^9.39.3",
+    "@types/node": "^20.19.35",
+    "@typescript-eslint/eslint-plugin": "^8.56.1",
+    "@typescript-eslint/parser": "^8.56.1",
+    "@vercel/ncc": "^0.38.4",
+    "eslint": "^9.39.3",
+    "eslint-config-prettier": "^10.1.8",
+    "eslint-plugin-prettier": "^5.5.5",
+    "globals": "^17.3.0",
+    "prettier": "^3.8.1",
+    "typescript": "^5.9.3"
   }
 }

src/main.ts

@@ -1,6 +1,7 @@
-import * as github from './github';
 import * as core from '@actions/core';
 
+import * as github from './github.js';
+
 async function run() {
   try {
     await github.exposeRuntime();

tsconfig.json

@@ -1,19 +1,15 @@
 {
   "compilerOptions": {
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
     "esModuleInterop": true,
-    "target": "es6",
-    "module": "commonjs",
-    "strict": true,
-    "sourceMap": true,
     "newLine": "lf",
     "outDir": "./lib",
     "rootDir": "./src",
     "forceConsistentCasingInFileNames": true,
     "noImplicitAny": false,
     "resolveJsonModule": true,
-    "useUnknownInCatchVariables": false,
+    "useUnknownInCatchVariables": false
   },
-  "exclude": [
-    "node_modules"
-  ]
+  "include": ["src/**/*.ts"]
 }