chore(buble): Move to Typescript (#231)

packages/buble/README.md

@@ -9,7 +9,7 @@
 
 # @rollup/plugin-buble
 
-🍣 A Rollup which converts ES2015+ code with the Bublé compiler.
+🍣 A Rollup plugin which converts ES2015+ code with the Bublé compiler.
 
 ## Requirements
 
@@ -49,7 +49,7 @@ Then call `rollup` either via the [CLI](https://www.rollupjs.org/guide/en/#comma
 Type: `Object`<br>
 Default: `{ modules: false }`
 
-Specifies additional [transform options](https://buble.surge.sh/guide/) for the Bublé compiler
+Specifies additional [transform options](https://buble.surge.sh/guide/) for the Bublé compiler.
 
 ### `exclude`
 

packages/buble/package.json

@@ -11,28 +11,31 @@
   "homepage": "https://github.com/rollup/plugins/tree/master/packages/buble/#readme",
   "bugs": "https://github.com/rollup/plugins/issues",
   "main": "dist/rollup-plugin-buble.cjs.js",
+  "engines": {
+    "node": ">= 8.0.0"
+  },
   "scripts": {
     "build": "rollup -c",
     "ci:coverage": "nyc pnpm run test && nyc report --reporter=text-lcov > coverage.lcov",
     "ci:lint": "pnpm run build && pnpm run lint",
     "ci:lint:commits": "commitlint --from=${CIRCLE_BRANCH} --to=${CIRCLE_SHA1}",
-    "ci:test": "pnpm run test -- --verbose && pnpm run test:ts",
+    "ci:test": "pnpm run test -- --verbose",
     "lint": "pnpm run lint:js && pnpm run lint:docs && pnpm run lint:package",
     "lint:docs": "prettier --single-quote --write README.md",
     "lint:js": "eslint --fix --cache src test types --ext .js,.ts",
     "lint:package": "prettier --write package.json --plugin=prettier-plugin-package",
     "prebuild": "del-cli dist",
     "prepare": "pnpm run build",
-    "prepublishOnly": "pnpm run lint && pnpm run test && pnpm run test:ts",
+    "prepublishOnly": "pnpm run lint && pnpm run test",
     "pretest": "pnpm run build",
     "test": "ava",
     "test:ts": "tsc types/index.d.ts test/types.ts --noEmit"
   },
   "files": [
     "dist",
-    "src",
     "types",
-    "README.md"
+    "README.md",
+    "LICENSE"
   ],
   "keywords": [
     "rollup",
@@ -51,14 +54,23 @@
     "buble": "^0.19.8"
   },
   "devDependencies": {
+    "@rollup/plugin-typescript": "^3.0.0",
     "del-cli": "^3.0.0",
     "rollup": "^1.27.14",
     "source-map": "^0.7.3",
     "typescript": "^3.7.4"
   },
   "ava": {
+    "compileEnhancements": false,
+    "extensions": [
+      "ts"
+    ],
+    "require": [
+      "ts-node/register"
+    ],
     "files": [
       "!**/fixtures/**",
+      "!**/output/**",
       "!**/helpers/**",
       "!**/recipes/**",
       "!**/types.ts"

packages/buble/rollup.config.js

@@ -1,7 +1,13 @@
+import typescript from '@rollup/plugin-typescript';
+
 import pkg from './package.json';
 
 export default {
-  input: 'src/index.js',
-  output: [{ format: 'es', file: pkg.module }, { format: 'cjs', file: pkg.main }],
-  external: ['buble', 'rollup-pluginutils']
+  input: 'src/index.ts',
+  output: [
+    { format: 'es', file: pkg.module }, 
+    { format: 'cjs', file: pkg.main }
+  ],
+  external: Object.keys(pkg.dependencies),
+  plugins: [typescript()]
 };

packages/buble/src/index.js → packages/buble/src/index.ts

@@ -1,7 +1,10 @@
 import { transform } from 'buble';
+import { Plugin } from 'rollup';
 import { createFilter } from '@rollup/pluginutils';
 
-export default function buble(options = {}) {
+import { RollupBubleOptions } from '../types';
+
+export default function buble(options: RollupBubleOptions = {}): Plugin {
   const filter = createFilter(options.include, options.exclude);
   const transformOptions = { ...options, transforms: { ...options.transforms, modules: false } };
 

packages/buble/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "lib": ["es6"],
+    "module": "esnext",
+    "allowJs": true
+  },
+  "include": [
+    "src/**/*",
+    "types/**/*",
+    "typings-test.js"
+  ]
+}