feat: move nursery to typescript

part of #10

Author: HerringtonDarkholme

.gitignore

@@ -129,5 +129,9 @@ dist
 .yarn/install-state.gz
 .pnp.*
 
+# ignore generated parser files
 packages/**/parser.so
+# do not include copied directories
 packages/**/src
+# ignore generated ts files in scripts
+scripts/**/*.{js, d.ts}

package.json

@@ -8,7 +8,7 @@
   "version": "0.0.1",
   "description": "Monorepo for `@ast-grep/lang-*` packages",
   "scripts": {
-    "postinstall": "pnpm -r copy-src",
+    "preprepare": "pnpm -r copy-src",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],

packages/toml/package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "copy-src": "node nursery.js copy",
     "build": "tree-sitter build -o parser.so",
-    "postinstall": "node postinstall.js",
+    "prepare": "node postinstall.js",
     "test": "node nursery.js test"
   },
   "files": [

pnpm-lock.yaml

@@ -0,0 +1,34 @@
+import { cp } from 'fs/promises'
+import { parse, registerDynamicLanguage, SgRoot, DynamicLangRegistrations } from '@ast-grep/napi'
+import path from 'path'
+
+async function copySrc(packageName: string) {
+  const src = path.join(process.cwd(), 'node_modules', packageName,  'src')
+  await cp(src, 'src', { recursive: true })
+}
+
+/** Setup ast-grep/lang package's pre-release
+ *
+ **/
+interface SetupConfig {
+  name: string
+  languageRegistration: DynamicLangRegistrations[string]
+  packageName: string
+  testRunner: (parse: (c: string) => SgRoot) => void
+}
+
+function test(setupConfig: SetupConfig) {
+  const { name, languageRegistration, testRunner } = setupConfig
+  registerDynamicLanguage({ [name]: languageRegistration })
+  testRunner((code) => parse(name, code))
+}
+
+/** Setup ast-grep/lang package's pre-release build and test */
+export function setup(setupConfig: SetupConfig) {
+  const arg = process.argv[2]
+  if (arg === 'copy') {
+    copySrc(setupConfig.packageName)
+  } else if (arg === 'test') {
+    test(setupConfig)
+  }
+}

scripts/nursery/index.js

@@ -7,12 +7,19 @@
   "keywords": [],
   "author": "",
   "license": "ISC",
+  "scripts": {
+    "prepare": "tsc"
+  },
   "dependencies": {
-    "tree-sitter-cli": "0.24.6",
-    "@ast-grep/napi": "0.33.0"
+    "@ast-grep/napi": "0.33.0",
+    "tree-sitter-cli": "0.24.6"
   },
   "publishConfig": {
     "access": "public",
     "registry": "https://registry.npmjs.org/"
+  },
+  "devDependencies": {
+    "typescript": "^5.7.3",
+    "@types/node": "22.10.5"
   }
 }

scripts/nursery/index.ts

@@ -0,0 +1,3 @@
+{
+  "extends": "../../tsconfig.json"
+}

scripts/nursery/package.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "customConditions": ["dev"],
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
+    "strict": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "exclude": [
+    "node_modules",
+    "dist"
+  ]
+}