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node_modules/os-locale/index.js

@@ -1,127 +1,114 @@
 'use strict';
-var childProcess = require('child_process');
-var execFileSync = childProcess.execFileSync;
-var lcid = require('lcid');
-var defaultOpts = {spawn: true};
-var cache;
+const execa = require('execa');
+const lcid = require('lcid');
+const mem = require('mem');
 
-function fallback() {
-	cache = 'en_US';
-	return cache;
+const defaultOptions = {spawn: true};
+const defaultLocale = 'en_US';
+
+function getEnvLocale(env = process.env) {
+	return env.LC_ALL || env.LC_MESSAGES || env.LANG || env.LANGUAGE;
 }
 
-function getEnvLocale(env) {
-	env = env || process.env;
-	var ret = env.LC_ALL || env.LC_MESSAGES || env.LANG || env.LANGUAGE;
-	cache = getLocale(ret);
-	return ret;
-}
-
-function parseLocale(x) {
-	var env = x.split('\n').reduce(function (env, def) {
-		def = def.split('=');
-		env[def[0]] = def[1];
+function parseLocale(string) {
+	const env = string.split('\n').reduce((env, def) => {
+		const [key, value] = def.split('=');
+		env[key] = value.replace(/^"|"$/g, '');
 		return env;
 	}, {});
+
 	return getEnvLocale(env);
 }
 
-function getLocale(str) {
-	return (str && str.replace(/[.:].*/, '')) || fallback();
+function getLocale(string) {
+	return (string && string.replace(/[.:].*/, ''));
 }
 
-module.exports = function (opts, cb) {
-	if (typeof opts === 'function') {
-		cb = opts;
-		opts = defaultOpts;
+function getLocales() {
+	return execa.stdout('locale', ['-a']);
+}
+
+function getLocalesSync() {
+	return execa.sync('locale', ['-a']).stdout;
+}
+
+function getSupportedLocale(locale, locales = '') {
+	return locales.includes(locale) ? locale : defaultLocale;
+}
+
+function getAppleLocale() {
+	return Promise.all([
+		execa.stdout('defaults', ['read', '-globalDomain', 'AppleLocale']),
+		getLocales()
+	]).then(results => getSupportedLocale(results[0], results[1]));
+}
+
+function getAppleLocaleSync() {
+	return getSupportedLocale(
+		execa.sync('defaults', ['read', '-globalDomain', 'AppleLocale']).stdout,
+		getLocalesSync()
+	);
+}
+
+function getUnixLocale() {
+	if (process.platform === 'darwin') {
+		return getAppleLocale();
+	}
+
+	return execa.stdout('locale')
+		.then(stdout => getLocale(parseLocale(stdout)));
+}
+
+function getUnixLocaleSync() {
+	if (process.platform === 'darwin') {
+		return getAppleLocaleSync();
+	}
+
+	return getLocale(parseLocale(execa.sync('locale').stdout));
+}
+
+function getWinLocale() {
+	return execa.stdout('wmic', ['os', 'get', 'locale'])
+		.then(stdout => {
+			const lcidCode = parseInt(stdout.replace('Locale', ''), 16);
+			return lcid.from(lcidCode);
+		});
+}
+
+function getWinLocaleSync() {
+	const {stdout} = execa.sync('wmic', ['os', 'get', 'locale']);
+	const lcidCode = parseInt(stdout.replace('Locale', ''), 16);
+	return lcid.from(lcidCode);
+}
+
+module.exports = mem((options = defaultOptions) => {
+	const envLocale = getEnvLocale();
+
+	let thenable;
+	if (envLocale || options.spawn === false) {
+		thenable = Promise.resolve(getLocale(envLocale));
+	} else if (process.platform === 'win32') {
+		thenable = getWinLocale();
 	} else {
-		opts = opts || defaultOpts;
+		thenable = getUnixLocale();
 	}
 
-	if (cache || getEnvLocale() || opts.spawn === false) {
-		setImmediate(cb, null, cache);
-		return;
-	}
+	return thenable
+		.then(locale => locale || defaultLocale)
+		.catch(() => defaultLocale);
+});
 
-	var getAppleLocale = function () {
-		childProcess.execFile('defaults', ['read', '-g', 'AppleLocale'], function (err, stdout) {
-			if (err) {
-				fallback();
-				return;
-			}
+module.exports.sync = mem((options = defaultOptions) => {
+	const envLocale = getEnvLocale();
 
-			cache = stdout.trim() || fallback();
-			cb(null, cache);
-		});
-	};
-
-	if (process.platform === 'win32') {
-		childProcess.execFile('wmic', ['os', 'get', 'locale'], function (err, stdout) {
-			if (err) {
-				fallback();
-				return;
-			}
-
-			var lcidCode = parseInt(stdout.replace('Locale', ''), 16);
-			cache = lcid.from(lcidCode) || fallback();
-			cb(null, cache);
-		});
+	let res;
+	if (envLocale || options.spawn === false) {
+		res = getLocale(envLocale);
 	} else {
-		childProcess.execFile('locale', function (err, stdout) {
-			if (err) {
-				fallback();
-				return;
-			}
-
-			var res = parseLocale(stdout);
-
-			if (!res && process.platform === 'darwin') {
-				getAppleLocale();
-				return;
-			}
-
-			cache = getLocale(res);
-			cb(null, cache);
-		});
-	}
-};
-
-module.exports.sync = function (opts) {
-	opts = opts || defaultOpts;
-
-	if (cache || getEnvLocale() || !execFileSync || opts.spawn === false) {
-		return cache;
-	}
-
-	if (process.platform === 'win32') {
-		var stdout;
-
 		try {
-			stdout = execFileSync('wmic', ['os', 'get', 'locale'], {encoding: 'utf8'});
-		} catch (err) {
-			return fallback();
-		}
-
-		var lcidCode = parseInt(stdout.replace('Locale', ''), 16);
-		cache = lcid.from(lcidCode) || fallback();
-		return cache;
+			res = process.platform === 'win32' ? getWinLocaleSync() : getUnixLocaleSync();
+		} catch (_) {}
 	}
 
-	var res;
-
-	try {
-		res = parseLocale(execFileSync('locale', {encoding: 'utf8'}));
-	} catch (err) {}
-
-	if (!res && process.platform === 'darwin') {
-		try {
-			cache = execFileSync('defaults', ['read', '-g', 'AppleLocale'], {encoding: 'utf8'}).trim() || fallback();
-			return cache;
-		} catch (err) {
-			return fallback();
-		}
-	}
-
-	cache = getLocale(res);
-	return cache;
-};
+	return res || defaultLocale;
+});