Migrate to ES Module

.github/workflows/continuous-integration.yml

@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
   # schedule:
   #   - cron: "0 23 * * 6"
@@ -15,12 +15,12 @@ jobs:
       matrix:
         os:
           - "ubuntu-latest"
-          # - "macos-latest"
-          # - "windows-latest"
+          - "macos-latest"
+          - "windows-latest"
         node_version:
+          - "16"
           - "14"
           - "12"
-          # - "10"
         # exclude:
         #   - os: "macos-latest"
         #     node_version: "12"
@@ -30,20 +30,18 @@ jobs:
     # needs: [build]
     steps:
       - name: Checkout
-        uses: actions/checkout@master
-        with:
-          depth: 1
+        uses: actions/checkout@v2
 
       - name: Setup Node.js
-        uses: actions/setup-node@master
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node_version }}
 
       - name: Install Dependencies
         run: yarn
 
       # - name: Download Artifact
-      #   uses: actions/download-artifact@master
+      #   uses: actions/download-artifact@v2
       #   with:
       #     name: dist
       #     path: dist
@@ -75,39 +73,35 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@master
-        with:
-          fetch-depth: 1
+        uses: actions/checkout@v2
 
       - name: Setup Node.js
-        uses: actions/setup-node@master
+        uses: actions/setup-node@v2
 
       - name: Install Dependencies
         run: yarn
 
       - name: Run Lint
         run: yarn lint
 
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@master
-        with:
-          fetch-depth: 1
+  # build:
+  #   name: Build
+  #   runs-on: ubuntu-latest
+  #   steps:
+  #     - name: Checkout
+  #       uses: actions/checkout@v2
 
-      - name: Setup Node.js
-        uses: actions/setup-node@master
+  #     - name: Setup Node.js
+  #       uses: actions/setup-node@v2
 
-      - name: Install Dependencies
-        run: yarn
+  #     - name: Install Dependencies
+  #       run: yarn
 
-      - name: Build Package
-        run: yarn build
+  #     - name: Build Package
+  #       run: yarn build
 
-      - name: Upload Artifact
-        uses: actions/upload-artifact@master
-        with:
-          name: dist
-          path: dist
+  #     - name: Upload Artifact
+  #       uses: actions/upload-artifact@v2
+  #       with:
+  #         name: dist
+  #         path: dist

lib/index.js

@@ -0,0 +1,11 @@
+import load from './load.js'
+import parse from './parse.js'
+import stringify from './stringify.js'
+
+export default {
+  load,
+  parse,
+  stringify,
+}
+
+export {load, parse, stringify}

src/load.js → lib/load.js

@@ -1,5 +1,5 @@
-import * as loader from './loader'
-import {getFileType} from './utils'
+import * as loader from './loader/index.js'
+import {getFileType} from './utils/index.js'
 
 function load(file, options) {
   if (typeof options === 'string') {

src/loader/cjs.js → lib/loader/cjs.js

@@ -1,6 +1,6 @@
 import importFresh from 'import-fresh'
 
-function loadCjs(file /* , options */) {
+async function loadCjs(file /* , options */) {
   return importFresh(file)
 }
 

lib/loader/esm.js

@@ -0,0 +1,15 @@
+import {pathToFileURL} from 'node:url'
+
+function interopDefault(module) {
+  if (typeof module === 'object' && 'default' in module) {
+    return module.default
+  }
+
+  return module
+}
+
+async function loadEsm(file /* , options */) {
+  return interopDefault(await import(pathToFileURL(file)))
+}
+
+export default loadEsm

lib/loader/index.js

@@ -0,0 +1,23 @@
+import {parserToLoader} from '../utils/index.js'
+import * as parsers from '../parser/index.js'
+import cjs from './cjs.js'
+import esm from './esm.js'
+
+const yaml = parserToLoader(parsers.yaml)
+const json5 = parserToLoader(parsers.json5)
+const toml = parserToLoader(parsers.toml)
+const ini = parserToLoader(parsers.ini)
+const json = parserToLoader(parsers.json)
+const js = async (...arguments_) => {
+  try {
+    await esm(...arguments_)
+  } catch (esmLoadError) {
+    try {
+      await cjs(...arguments_)
+    } catch {
+      throw esmLoadError
+    }
+  }
+}
+
+export {esm, yaml, json5, toml, js, cjs, json, ini}

src/parse.js → lib/parse.js

@@ -1,5 +1,5 @@
-import * as parser from './parser'
-import {getFileType} from './utils'
+import * as parser from './parser/index.js'
+import {getFileType} from './utils/index.js'
 
 function parse(string, options) {
   if (typeof options === 'string') {

lib/parser/index.js

@@ -0,0 +1,5 @@
+export {default as yaml} from './yaml.js'
+export {default as json5} from './json5.js'
+export {default as json} from './json.js'
+export {default as toml} from './toml.js'
+export {default as ini} from './ini.js'

src/parser/json5.js → lib/parser/json5.js

@@ -1,7 +1,7 @@
-import {parse} from 'json5'
+import json5 from 'json5'
 
 function parseJson5(content /* , options */) {
-  return parse(content)
+  return json5.parse(content)
 }
 
 export default parseJson5

src/parser/yaml.js → lib/parser/yaml.js

@@ -1,11 +1,11 @@
-import {safeLoad} from 'js-yaml'
+import {load} from 'js-yaml'
 
 function parseYaml(content, options) {
   const {filename} = {
     filename: '',
     ...options,
   }
-  return safeLoad(content, {filename})
+  return load(content, {filename})
 }
 
 export default parseYaml

src/stringifier/cjs.js → lib/stringifier/cjs.js

@@ -1,4 +1,4 @@
-import json5Stringify from './json5'
+import json5Stringify from './json5.js'
 
 function stringifyCjs(data, options) {
   return `module.exports = ${json5Stringify(data, options)};`

src/stringifier/esm.js → lib/stringifier/esm.js

@@ -1,4 +1,4 @@
-import json5Stringify from './json5'
+import json5Stringify from './json5.js'
 
 function stringifyEsm(data, options) {
   return `export default ${json5Stringify(data, options)};`

lib/stringifier/index.js

@@ -0,0 +1,7 @@
+export {default as json} from './json.js'
+export {default as json5} from './json5.js'
+export {default as yaml} from './yaml.js'
+export {default as toml} from './toml.js'
+export {default as cjs} from './cjs.js'
+export {default as esm} from './esm.js'
+export {default as ini} from './ini.js'

src/stringifier/json5.js → lib/stringifier/json5.js

@@ -1,11 +1,11 @@
-import {stringify} from 'json5'
+import json5 from 'json5'
 
 function stringifyJson5(data, options) {
   const {pretty} = {
     pretty: false,
     ...options,
   }
-  return pretty ? stringify(data, undefined, 2) : stringify(data)
+  return pretty ? json5.stringify(data, undefined, 2) : json5.stringify(data)
 }
 
 export default stringifyJson5

src/stringifier/yaml.js → lib/stringifier/yaml.js

@@ -1,4 +1,4 @@
-import {safeDump} from 'js-yaml'
+import {dump} from 'js-yaml'
 
 function stringifyYaml(data, options) {
   const {pretty, sort} = {
@@ -7,7 +7,7 @@ function stringifyYaml(data, options) {
     ...options,
   }
 
-  return safeDump(data, {
+  return dump(data, {
     noArrayIndent: !pretty,
     sortKeys: sort,
     lineWidth: pretty ? 80 : -1,

src/stringify.js → lib/stringify.js

@@ -1,4 +1,4 @@
-import * as stringifier from './stringifier'
+import * as stringifier from './stringifier/index.js'
 
 function stringify(data, options) {
   if (typeof options === 'string') {

src/utils/get-file-type.js → lib/utils/get-file-type.js

@@ -1,4 +1,4 @@
-import path from 'path'
+import path from 'node:path'
 
 const fileTypes = {
   '.mjs': 'esm',

lib/utils/index.js

@@ -0,0 +1,2 @@
+export {default as parserToLoader} from './parser-to-loader.js'
+export {default as getFileType} from './get-file-type.js'

lib/utils/parser-to-loader.js

@@ -0,0 +1,14 @@
+import {promises as fs} from 'node:fs'
+
+function parserToLoader(parser) {
+  return async function loader(filename, options) {
+    const content = await fs.readFile(filename, 'utf8')
+
+    return parser(content, {
+      filename,
+      ...options,
+    })
+  }
+}
+
+export default parserToLoader