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'use strict';
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const execa = require('execa');
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const lcid = require('lcid');
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const mem = require('mem');
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const defaultOptions = {spawn: true};
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const defaultLocale = 'en_US';
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function getEnvLocale(env) {
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env = env || process.env;
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return env.LC_ALL || env.LC_MESSAGES || env.LANG || env.LANGUAGE;
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}
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function parseLocale(x) {
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const env = x.split('\n').reduce((env, def) => {
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def = def.split('=');
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env[def[0]] = def[1].replace(/^"|"$/g, '');
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return env;
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}, {});
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return getEnvLocale(env);
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}
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function getLocale(string) {
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return (string && string.replace(/[.:].*/, ''));
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}
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function getAppleLocale() {
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return execa.stdout('defaults', ['read', '-g', 'AppleLocale']);
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}
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function getAppleLocaleSync() {
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return execa.sync('defaults', ['read', '-g', 'AppleLocale']).stdout;
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}
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function getUnixLocale() {
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if (process.platform === 'darwin') {
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return getAppleLocale();
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}
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return execa.stdout('locale')
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.then(stdout => getLocale(parseLocale(stdout)));
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}
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function getUnixLocaleSync() {
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if (process.platform === 'darwin') {
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return getAppleLocaleSync();
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}
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return getLocale(parseLocale(execa.sync('locale').stdout));
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}
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function getWinLocale() {
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return execa.stdout('wmic', ['os', 'get', 'locale'])
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.then(stdout => {
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const lcidCode = parseInt(stdout.replace('Locale', ''), 16);
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return lcid.from(lcidCode);
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});
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}
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function getWinLocaleSync() {
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const {stdout} = execa.sync('wmic', ['os', 'get', 'locale']);
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const lcidCode = parseInt(stdout.replace('Locale', ''), 16);
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return lcid.from(lcidCode);
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}
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module.exports = mem((options = defaultOptions) => {
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const envLocale = getEnvLocale();
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let thenable;
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if (envLocale || options.spawn === false) {
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thenable = Promise.resolve(getLocale(envLocale));
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} else if (process.platform === 'win32') {
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thenable = getWinLocale();
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} else {
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thenable = getUnixLocale();
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}
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return thenable.then(locale => locale || defaultLocale)
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.catch(() => defaultLocale);
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});
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module.exports.sync = mem((options = defaultOptions) => {
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const envLocale = getEnvLocale();
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let res;
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if (envLocale || options.spawn === false) {
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res = getLocale(envLocale);
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} else {
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try {
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if (process.platform === 'win32') {
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res = getWinLocaleSync();
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} else {
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res = getUnixLocaleSync();
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}
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} catch (_) {}
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}
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return res || defaultLocale;
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});
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