feat: Declare CJS, UMD and ES exports in package.json

Support modern Node.js environments.

* Expose an ESM module. Loadable in the browsers too.
* Add source maps to all exports. Node.js can them today.
* Replace modules like `fs-extra` and `rimraf` with new features from `fs`. Prefer built-ins.
* Convert tools and tests from CJS to ESM. Needed after inserting `type:module` to `package.json`.
* Remove transpilation with `babel`. No need for it with today's Node.js and browsers.
* Set up `jest` to use ES with Node.js. Not so simple, but doable.
* Replace `eslint` with `denolint`. Much faster.
* Replace `terser` with `swc`. Much faster.
* Use ES instead of CJS in code examples. Be modern.
* Move benchmark dependencies to the `perf` sub-directory. Speed up the CI build.
* Simplify build.
* Use global `await` in build scripts.

BREAKING CHANGE: Newer Node.js required, different command-line parsing, renamed CJS exports.
* Node.js 14.8 or newer is required for the `create-plural-data` script. Also supports `type`, `module`, `types` and `exports`. The sources of the library didn't change, which means that the exported modules should still work in Node.js 6 and newer, but the're no tests proving that.
* Command-line argument parsing done by a custom code instead of using `commander`. Boolean arguments cannot be joined to groups like `-mpv`. They have to be passed separately, for example: `-m -p -v`. Also, the command-line script requires Node.js with the ESM support, which means >= 14.8.
* CJS modules in the `dist` directory end with the file extension `.cjs` instead of `.js`. (ES modules end with `.mjs`.) Usually imported main exports are not affected, because they are imported in both CJS and ES modules using the package name.

Author: prantlf

.babelrc

@@ -0,0 +1,5 @@
+{
+  "rules": {
+    "tags": ["recommended"]
+  }
+}

.denolint.json

@@ -24,7 +24,7 @@ jobs:
     - name: Test
       run: npm test
     - name: Coverage
-      run: pnpx -y codecov
+      uses: codecov/codecov-action@v2
     - name: Publish
       uses: cycjimmy/semantic-release-action@v2
       with:

.eslintrc.ts.yml

@@ -4,4 +4,3 @@ dist
 node_modules
 src/data.js
 test/browser
-test/typings.test.js

.eslintrc.yml

@@ -1,12 +1,47 @@
-# Changes
+## [1.0.2](https://github.com/prantlf/plural-rules/compare/v1.0.1...v1.0.2) (2022-01-28)
+
+### Bug Fixes
+
+* Adapt sources after upgrading the build environment ([9f4021e](https://github.com/prantlf/plural-rules/commit/9f4021e7c7c272a2df7157f105b0638d3ea09eb1))
+
+## [1.0.1](https://github.com/prantlf/plural-rules/compare/v1.0.0...v1.0.1) (2019-09-24)
+
+### Bug Fixes
+
+* Upgrade package dependencies ([bf8bfa6](https://github.com/prantlf/plural-rules/commit/bf8bfa6))
+
+# [1.0.0](https://github.com/prantlf/plural-rules/compare/v0.1.0...v1.0.0) (2019-08-03)
+
+### Features
+
+* Improve the data compression by serialising plural form objects to strings ([858c2a0](https://github.com/prantlf/plural-rules/commit/858c2a0))
+
+### BREAKING CHANGES
+
+* Plural data created by this version of the library cannot be consumed by *older versions*. It would be unusual, if you created data by tis version and fed them to an older version of the library, but nevertheless, be aware of it. If you create data by this version, use them with the same major version or a newer one, as long as it is documented to be feasible.
+
+Plural data created by older versios of this library can still be used with this version. The code is beckwards compatible.
 
 ## 2019-08-03   v1.0.0
 
 Decrease the size of the packed plural rules and forms
 
-## 2019-08-03   v0.1.0
+# [0.1.0](https://github.com/prantlf/plural-rules/compare/v0.0.2...v0.1.0) (2019-08-03)
+
+### Bug Fixes
+
+* Transpile the CJS module output for Node.js 6 or newer ([6fb15aa](https://github.com/prantlf/plural-rules/commit/6fb15aa))
+
+### Features
+
+* Upgrade CLDR data to the version 35.1
+* Provide both minificated and only cleaned-up UMD scripts for the browser ([460efad](https://github.com/prantlf/plural-rules/commit/460efad))
+
+## [0.0.2](https://github.com/prantlf/plural-rules/compare/v0.0.1...v0.0.2) (2019-06-07)
+
+### Bug Fixes
 
-Upgrade CLDR data to the version 35.1
+* Upgrade module dependencies ([a76acb4](https://github.com/prantlf/plural-rules/commit/a76acb4))
 
 ## 2018-11-05   v0.0.1
 

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ If you are looking for a smaller and [faster](https://github.com/prantlf/fast-pl
 ## Synopsis
 
 ```js
-const { getPluralFormForCardinal } = require('plural-rules')
+import { getPluralFormForCardinal } from 'plural-rules'
 
 // Returns index of the plural form for the specified locale and cardinal.
 getPluralFormForCardinal('en', 1) // Returns "one";   "1 file"
@@ -81,10 +81,10 @@ $ yarn add plural-rules
 Functions are exposed as named exports, for example:
 
 ```js
-const { getPluralFormForCardinal } = require('plural-rules')
+import { getPluralFormForCardinal } from 'plural-rules'
 ```
 
-You can read more about the [module loading](./docs/API.md#loading) in other environments, like with ES6 or in web browsers. [Usage scenarios](./docs/usage.md#usage-scenarios) demonstrate applications of this library in typical real-world situations. [Design concepts](./docs/design.md#design-concepts) explain the approach to the correct internationalization of messages with cardinals taken by this library. Translators will read about [plural rules for supported languages](./docs/languages.md#supported-languages) to be able to write the right plural forms to language packs. [Data genrator](#./API.md#data-generator) enables customizing the the amount of recognized languages and thus shrink the library size. Finally, the [API reference](./docs/API.md#api-reference) lists all functions with a description of their functionality.
+You can read more about the [module loading](./docs/API.md#loading) in other environments, like with ESM or in web browsers. [Usage scenarios](./docs/usage.md#usage-scenarios) demonstrate applications of this library in typical real-world situations. [Design concepts](./docs/design.md#design-concepts) explain the approach to the correct internationalization of messages with cardinals taken by this library. Translators will read about [plural rules for supported languages](./docs/languages.md#supported-languages) to be able to write the right plural forms to language packs. [Data genrator](#./API.md#data-generator) enables customizing the the amount of recognized languages and thus shrink the library size. Finally, the [API reference](./docs/API.md#api-reference) lists all functions with a description of their functionality.
 
 ## Contributing
 

.gitignore

@@ -0,0 +1,112 @@
+#!/usr/bin/env node
+
+import { createPluralData } from '../util/data-creator.js'
+import { readFileSync } from 'fs'
+import { dirname, join } from 'path'
+import { fileURLToPath } from 'url'
+
+function usage () {
+  console.log(`Generates plural rules and forms for selected locales.
+
+Usage: create-plural-data [options] <locale> [<locale> ...]
+
+Options:
+  -a|--all-locales         incudes all available locales
+  -c|--as-cjs-module       format the plural data as a CommonJS module
+  -d|--as-amd-module       format the plural data as an AMD module
+  -m|--as-module           format the plural data as an ES module
+  -n|--umd-name <name>     UMD global export name, if not "pluralData"
+  -o|--output-file <file>  write the plural data to a file
+  -p|--packed              pack the plural rules in plural forms
+  -u|--as-umd-module       format the plural data as an UMD module
+  -v|--include-version     include version of the CLDR source
+
+Plural data are printed on the standard output as JSON by default.
+Packed plural data must be used as a single module; not for merging.
+
+Examples:
+  create-pural-data cs
+  create-plural-data -m -p -v -o custom-data.js en de cs pl hu ru`)
+}
+
+function version() {
+  const __dirname = dirname(fileURLToPath(import.meta.url))
+  const { version } = JSON.parse(readFileSync(join(__dirname, '../package.json'), 'utf8'))
+  console.log(version)
+}
+
+const { argv } = process
+let allLocales, asModule, asCjsModule, asAmdModule, asUmdModule, umdName,
+    packed, includeVersion, outputFile
+const locales = []
+
+for (let i = 2, l = argv.length; i < l; ++i) {
+  const arg = argv[i]
+  const match = /^(?:-|--)([a-zA-Z][-a-z]*)$/.exec(arg)
+  if (match) {
+    switch (match[1]) {
+      case 'a': case 'all-locales':
+        allLocales = true
+        continue
+      case 'c': case 'as-cjs-module':
+        asCjsModule = true
+        continue
+      case 'd': case 'as-amd-module':
+        asAmdModule = true
+        continue
+      case 'm': case 'as-module':
+        asModule = true
+        continue
+      case 'n': case 'umd-name':
+        umdName = argv[++i]
+        continue
+      case 'o': case 'output-file':
+        outputFile = argv[++i]
+        continue
+      case 'p': case 'packed':
+        packed = true
+        continue
+      case 'u': case 'as-umd-module':
+        asUmdModule = true
+        continue
+      case 'v': case 'include-version':
+        includeVersion = true
+        continue
+      case 'V': case 'version':
+        version()
+        process.exit(0)
+        /* falls through */
+      case 'h': case 'help':
+        usage()
+        process.exit(0)
+    }
+    console.error(`Unknown argument: "${arg}".`)
+    process.exit(1)
+  }
+  locales.push(arg)
+}
+
+if (!locales.length && !allLocales) {
+  usage()
+  process.exit(0)
+}
+
+try {
+  const pluralData = await createPluralData({
+    locales,
+    asModule,
+    asCjsModule,
+    asAmdModule,
+    asUmdModule,
+    umdName,
+    packed,
+    includeVersion,
+    outputFile
+  })
+  if (!outputFile) {
+    console.log(pluralData)
+  }
+} catch (error) {
+  console.error(error.message)
+  process.exitCode = 1
+}