fix(json): prepare for Rollup 3

BREAKING CHANGES: Requires Node 14

packages/json/README.md

@@ -13,7 +13,7 @@
 
 ## Requirements
 
-This plugin requires an [LTS](https://github.com/nodejs/Release) Node version (v8.0.0+) and Rollup v1.20.0+.
+This plugin requires an [LTS](https://github.com/nodejs/Release) Node version (v14.0.0+) and Rollup v1.20.0+.
 
 ## Install
 
@@ -46,7 +46,9 @@ With an accompanying file `src/index.js`, the local `package.json` file would no
 
 ```js
 // src/index.js
-import pkg from './package.json';
+import { readFileSync } from 'fs';
+
+const pkg = JSON.parse(readFileSync(new URL('./package.json', import.meta.url), 'utf8'));
 console.log(`running version ${pkg.version}`);
 ```
 

packages/json/package.json

@@ -13,8 +13,15 @@
   "author": "rollup",
   "homepage": "https://github.com/rollup/plugins/tree/master/packages/json#readme",
   "bugs": "https://github.com/rollup/plugins/issues",
-  "main": "dist/index.js",
-  "module": "dist/index.es.js",
+  "main": "./dist/cjs/index.js",
+  "module": "./dist/es/index.js",
+  "exports": {
+    "require": "./dist/cjs/index.js",
+    "import": "./dist/es/index.js"
+  },
+  "engines": {
+    "node": ">=14.0.0"
+  },
   "scripts": {
     "build": "rollup -c",
     "ci:coverage": "nyc pnpm test && nyc report --reporter=text-lcov > coverage.lcov",
@@ -30,7 +37,7 @@
     "test:ts": "tsc types/index.d.ts test/types.ts --noEmit"
   },
   "files": [
-    "dist",
+    "dist/**/*.{js,json}",
     "types",
     "README.md",
     "LICENSE"
@@ -44,22 +51,25 @@
     "modules"
   ],
   "peerDependencies": {
-    "rollup": "^1.20.0 || ^2.0.0"
+    "rollup": "^1.20.0||^2.0.0||^3.0.0"
+  },
+  "peerDependenciesMeta": {
+    "rollup": {
+      "optional": true
+    }
   },
   "dependencies": {
-    "@rollup/pluginutils": "^3.0.8"
+    "@rollup/pluginutils": "^4.2.1"
   },
   "devDependencies": {
     "@rollup/plugin-buble": "^0.21.0",
-    "@rollup/plugin-node-resolve": "^8.4.0",
-    "rollup": "^2.67.3",
-    "source-map-support": "^0.5.19"
+    "@rollup/plugin-node-resolve": "^14.1.0",
+    "rollup": "^3.0.0-7",
+    "source-map-support": "^0.5.21"
   },
   "types": "types/index.d.ts",
   "ava": {
-    "babel": {
-      "compileEnhancements": false
-    },
+    "workerThreads": false,
     "files": [
       "!**/fixtures/**",
       "!**/helpers/**",

packages/json/rollup.config.mjs

@@ -0,0 +1,13 @@
+import { readFileSync } from 'fs';
+
+import buble from '@rollup/plugin-buble';
+
+import { createConfig } from '../../shared/rollup.config.mjs';
+
+export default {
+  ...createConfig({
+    pkg: JSON.parse(readFileSync(new URL('./package.json', import.meta.url), 'utf8'))
+  }),
+  input: 'src/index.js',
+  plugins: [buble()]
+};

packages/json/test/snapshots/test.js.md

@@ -2,41 +2,17 @@
 
 The actual snapshot is saved in `test.js.snap`.
 
-Generated by [AVA](https://ava.li).
+Generated by [AVA](https://avajs.dev).
 
-## generates correct code with compact=true
-
-> Snapshot 1
-
-    'export var validKey=true;export var nested={subKey:"ok"};export var array=[1,"2"];export default{validKey:validKey,"invalid-key":1,nested:nested,array:array,"function":"not used","null":null};'
-
-## generates correct code with namedExports=false
-
-> Snapshot 1
-
-    `export default {␊
-    	validKey: true,␊
-    	"invalid-key": 1,␊
-    	nested: {␊
-    		subKey: "ok"␊
-    	},␊
-    	array: [␊
-    		1,␊
-    		"2"␊
-    	],␊
-    	"function": "not used",␊
-    	"null": null␊
-    };`
-
-## generates correct code with preferConst
+## generates properly formatted code
 
 > Snapshot 1
 
-    `export const validKey = true;␊
-    export const nested = {␊
+    `export var validKey = true;␊
+    export var nested = {␊
     	subKey: "ok"␊
     };␊
-    export const array = [␊
+    export var array = [␊
     	1,␊
     	"2"␊
     ];␊
@@ -50,15 +26,15 @@ Generated by [AVA](https://ava.li).
     };␊
     `
 
-## generates properly formatted code
+## generates correct code with preferConst
 
 > Snapshot 1
 
-    `export var validKey = true;␊
-    export var nested = {␊
+    `export const validKey = true;␊
+    export const nested = {␊
     	subKey: "ok"␊
     };␊
-    export var array = [␊
+    export const array = [␊
     	1,␊
     	"2"␊
     ];␊
@@ -93,3 +69,27 @@ Generated by [AVA](https://ava.li).
       "null": null␊
     };␊
     `
+
+## generates correct code with compact=true
+
+> Snapshot 1
+
+    'export var validKey=true;export var nested={subKey:"ok"};export var array=[1,"2"];export default{validKey:validKey,"invalid-key":1,nested:nested,array:array,"function":"not used","null":null};'
+
+## generates correct code with namedExports=false
+
+> Snapshot 1
+
+    `export default {␊
+    	validKey: true,␊
+    	"invalid-key": 1,␊
+    	nested: {␊
+    		subKey: "ok"␊
+    	},␊
+    	array: [␊
+    		1,␊
+    		"2"␊
+    	],␊
+    	"function": "not used",␊
+    	"null": null␊
+    };`

packages/json/test/test.js

@@ -48,7 +48,7 @@ test('generates named exports', async (t) => {
     plugins: [json()]
   });
 
-  const { code, result } = await testBundle(t, bundle, { exports: {} });
+  const { code, result } = await testBundle(t, bundle, { inject: { exports: {} } });
 
   t.is(result.version, '1.33.7');
   t.is(code.indexOf('this-should-be-excluded'), -1, 'should exclude unused properties');

shared/rollup.config.mjs

@@ -23,14 +23,14 @@ export function createConfig({ pkg, external = [] }) {
     output: [
       {
         format: 'cjs',
-        file: pkg.main,
+        file: pkg.exports.require,
         exports: 'named',
         footer: 'module.exports = Object.assign(exports.default, exports);',
         sourcemap: true
       },
       {
         format: 'es',
-        file: pkg.module,
+        file: pkg.exports.import,
         plugins: [emitModulePackageFile()],
         sourcemap: true
       }

tsconfig.base.json

@@ -12,7 +12,7 @@
     "pretty": true,
     "sourceMap": true,
     "strict": true,
-    "target": "es2017"
+    "target": "es2019"
   },
   "exclude": ["dist", "node_modules", "test/types"]
 }