Require Node.js 12.20 and move to ESM

.github/workflows/main.yml

@@ -10,13 +10,10 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 14
-          - 12
-          - 10
-          - 8
+          - 16
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

index.d.ts

@@ -1,36 +1,39 @@
-declare namespace shellEnv {
-	interface EnvironmentVariables {
-		readonly [key: string]: string;
-	}
-}
-
-declare const shellEnv: {
-	/**
-	Get the environment variables defined in your dotfiles.
-
-	@param shell - The shell to read environment variables from. Default: User default shell.
-	@returns The environment variables.
-
-	@example
-	```
-	import shellEnv = require('shell-env');
-
-	console.log(shellEnv.sync());
-	//=> {TERM_PROGRAM: 'Apple_Terminal', SHELL: '/bin/zsh', ...}
-
-	console.log(shellEnv.sync('/bin/bash'));
-	//=> {TERM_PROGRAM: 'iTerm.app', SHELL: '/bin/zsh', ...}
-	```
-	*/
-	(shell?: string): Promise<shellEnv.EnvironmentVariables>;
-
-	/**
-	Get the environment variables defined in your dotfiles.
-
-	@param shell - The shell to read environment variables from. Default: User default shell.
-	@returns The environment variables.
-	*/
-	sync(shell?: string): shellEnv.EnvironmentVariables;
-};
-
-export = shellEnv;
+export type EnvironmentVariables = Readonly<Record<string, string>>;
+
+/**
+Get the environment variables defined in your dotfiles.
+
+@param shell - The shell to read environment variables from. Default: User default shell.
+@returns The environment variables.
+
+@example
+```
+import {shellEnv} from 'shell-env';
+
+console.log(await shellEnv());
+//=> {TERM_PROGRAM: 'Apple_Terminal', SHELL: '/bin/zsh', ...}
+
+console.log(await shellEnv('/bin/bash'));
+//=> {TERM_PROGRAM: 'iTerm.app', SHELL: '/bin/zsh', ...}
+```
+*/
+export function shellEnv(shell?: string): Promise<EnvironmentVariables>;
+
+/**
+Get the environment variables defined in your dotfiles.
+
+@param shell - The shell to read environment variables from. Default: User default shell.
+@returns The environment variables.
+
+@example
+```
+import {shellEnvSync} from 'shell-env';
+
+console.log(shellEnvSync());
+//=> {TERM_PROGRAM: 'Apple_Terminal', SHELL: '/bin/zsh', ...}
+
+console.log(shellEnvSync('/bin/bash'));
+//=> {TERM_PROGRAM: 'iTerm.app', SHELL: '/bin/zsh', ...}
+```
+*/
+export function shellEnvSync(shell?: string): EnvironmentVariables;

index.js

@@ -1,31 +1,31 @@
-'use strict';
-const execa = require('execa');
-const stripAnsi = require('strip-ansi');
-const defaultShell = require('default-shell');
+import process from 'node:process';
+import execa from 'execa';
+import stripAnsi from 'strip-ansi';
+import defaultShell from 'default-shell';
 
 const args = [
 	'-ilc',
-	'echo -n "_SHELL_ENV_DELIMITER_"; env; echo -n "_SHELL_ENV_DELIMITER_"; exit'
+	'echo -n "_SHELL_ENV_DELIMITER_"; env; echo -n "_SHELL_ENV_DELIMITER_"; exit',
 ];
 
 const env = {
 	// Disables Oh My Zsh auto-update thing that can block the process.
-	DISABLE_AUTO_UPDATE: 'true'
+	DISABLE_AUTO_UPDATE: 'true',
 };
 
 const parseEnv = env => {
 	env = env.split('_SHELL_ENV_DELIMITER_')[1];
-	const ret = {};
+	const returnValue = {};
 
 	for (const line of stripAnsi(env).split('\n').filter(line => Boolean(line))) {
 		const [key, ...values] = line.split('=');
-		ret[key] = values.join('=');
+		returnValue[key] = values.join('=');
 	}
 
-	return ret;
+	return returnValue;
 };
 
-module.exports = async shell => {
+export async function shellEnv(shell) {
 	if (process.platform === 'win32') {
 		return process.env;
 	}
@@ -40,9 +40,9 @@ module.exports = async shell => {
 			return process.env;
 		}
 	}
-};
+}
 
-module.exports.sync = shell => {
+export function shellEnvSync(shell) {
 	if (process.platform === 'win32') {
 		return process.env;
 	}
@@ -57,4 +57,4 @@ module.exports.sync = shell => {
 			return process.env;
 		}
 	}
-};
+}

index.test-d.ts

@@ -1,6 +1,5 @@
 import {expectType} from 'tsd';
-import shellEnv = require('.');
-import {EnvironmentVariables} from '.';
+import {shellEnv, shellEnvSync, EnvironmentVariables} from './index.js';
 
-expectType<EnvironmentVariables>(shellEnv.sync());
 expectType<Promise<EnvironmentVariables>>(shellEnv());
+expectType<EnvironmentVariables>(shellEnvSync());

package.json

@@ -10,8 +10,10 @@
 		"email": "sindresorhus@gmail.com",
 		"url": "https://sindresorhus.com"
 	},
+	"type": "module",
+	"exports": "./index.js",
 	"engines": {
-		"node": ">=8"
+		"node": "^12.20.0 || ^14.13.1 || >=16.0.0"
 	},
 	"scripts": {
 		"test": "xo && ava && tsd"
@@ -32,13 +34,13 @@
 		"electron"
 	],
 	"dependencies": {
-		"default-shell": "^1.0.1",
-		"execa": "^1.0.0",
-		"strip-ansi": "^5.2.0"
+		"default-shell": "^2.0.0",
+		"execa": "^5.1.1",
+		"strip-ansi": "^7.0.0"
 	},
 	"devDependencies": {
-		"ava": "^1.4.1",
-		"tsd": "^0.7.2",
-		"xo": "^0.24.0"
+		"ava": "^3.15.0",
+		"tsd": "^0.17.0",
+		"xo": "^0.44.0"
 	}
 }

readme.md

@@ -13,12 +13,12 @@ $ npm install shell-env
 ## Usage
 
 ```js
-const shellEnv = require('shell-env');
+import {shellEnv} from 'shell-env';
 
-console.log(shellEnv.sync());
+console.log(await shellEnv());
 //=> {TERM_PROGRAM: 'Apple_Terminal', SHELL: '/bin/zsh', ...}
 
-console.log(shellEnv.sync('/bin/bash'));
+console.log(await shellEnv('/bin/bash'));
 //=> {TERM_PROGRAM: 'iTerm.app', SHELL: '/bin/zsh', ...}
 ```
 
@@ -30,7 +30,7 @@ Note that for Bash, it reads [`.bash_profile`, but not `.bashrc`](https://apple.
 
 Return a promise for the environment variables.
 
-### shellEnv.sync(shell?)
+### shellEnvSync(shell?)
 
 Returns the environment variables.
 

test.js

@@ -1,5 +1,5 @@
 import test from 'ava';
-import shellEnv from '.';
+import {shellEnv, shellEnvSync} from './index.js';
 
 test('async', async t => {
 	const env = await shellEnv();
@@ -8,31 +8,31 @@ test('async', async t => {
 });
 
 test('sync', t => {
-	const env = shellEnv.sync();
+	const env = shellEnvSync();
 	t.true('HOME' in env);
 	t.false('' in env);
 });
 
-test('async with custom shell', async t => {
+test('async - with custom shell', async t => {
 	const shell = '/bin/bash';
 	const env = await shellEnv(shell);
 	t.true('HOME' in env);
 	t.false('' in env);
 });
 
-test('sync with custom shell', t => {
+test('sync - with custom shell', t => {
 	const shell = '/bin/bash';
-	const env = shellEnv.sync(shell);
+	const env = shellEnvSync(shell);
 	t.true('HOME' in env);
 	t.false('' in env);
 });
 
-test('sync with custom shell throws on non-executable', t => {
+test('async - with custom shell throws on non-executable', async t => {
+	await t.throwsAsync(shellEnv('non-executable'));
+});
+
+test('sync - with custom shell throws on non-executable', t => {
 	t.throws(() => {
 		shellEnv.sync('non-executable');
 	});
 });
-
-test('async with custom shell throws on non-executable', async t => {
-	await t.throwsAsync(shellEnv('non-executable'));
-});