Convert to ESM (#72)

* Convert to ESM

* Switch to npm from yarn

* Cleanup module imports

* Fix babel config for jest

.eslintrc.js → .eslintrc.cjs

@@ -11,6 +11,17 @@ module.exports = {
     jest: false,
   },
 
+  parser: '@babel/eslint-parser',
+  parserOptions: {
+    babelOptions: {
+      plugins: [
+        '@babel/plugin-syntax-import-assertions'
+      ],
+    },
+    requireConfigFile: false,
+    sourceType: 'module',
+  },
+
   rules: {
     'arrow-parens': 'off', // conflicts with prettier
     'comma-dangle': ['error', 'only-multiline'], // conflicts with prettier
@@ -22,5 +33,6 @@ module.exports = {
     'operator-linebreak': 'off', // conflicts with prettier
     'semi-style': 'off', // conflicts with prettier
     semi: ['error', 'never'], // to match prettier settings
+    'import/extensions': ['error', 'ignorePackages'],
   },
 }

.github/workflows/build.yml

@@ -18,12 +18,12 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - name: Use Node.js 16.x
+      - name: Use Node.js 18.x
         uses: actions/setup-node@v3
         with:
-          node-version: 16.x
-      - run: yarn install
+          node-version: 18.x
+      - run: npm install
       - run: VERBOSE=1 ./bin/cli.js check
-      - run: yarn test
+      - run: npm run test
       - run: VERBOSE=1 ./bin/cli.js bump
       - run: VERBOSE=1 ./bin/cli.js publish

.lintstagedrc.cjs

@@ -0,0 +1,3 @@
+module.exports = {
+  '**/*.{js,jsx,json,css}': ['prettier --config .prettierrc.cjs --write'],
+}

babel.config.json

@@ -0,0 +1,4 @@
+{
+  "presets": ["@babel/preset-env"],
+  "plugins": ["@babel/plugin-syntax-import-assertions"]
+}

bin/cli.js

@@ -2,10 +2,12 @@
 
 /* eslint-disable no-console */
 
-const chalk = require('chalk')
-const program = require('commander')
-const {name, version} = require('../package.json')
-const {createBumpr} = require('../src/cli')
+import chalk from 'chalk'
+import program from 'commander'
+import pkgJson from '../package.json' assert {type: 'json'}
+import {createBumpr} from '../src/cli.js'
+
+const {name, version} = pkgJson
 
 function handleError(error) {
   const msg = error.message ? error.message : error

jest.config.js → jest.config.cjs

@@ -3,9 +3,12 @@ module.exports = {
   coverageThreshold: {
     global: {
       branches: 100,
-      statements: 100
-    }
+      statements: 100,
+    },
   },
   testEnvironment: 'node',
-  testMatch: ['<rootDir>/**/tests/*.test.js']
+  testMatch: ['<rootDir>/**/tests/*.test.js'],
+  transform: {
+    '^.+\\.[t|j]sx?$': 'babel-jest',
+  },
 }