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'use strict';
const execa = require('execa');
const lcid = require('lcid');
const mem = require('mem');
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 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(string) {
return (string && string.replace(/[.:].*/, ''));
}
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 {
thenable = getUnixLocale();
}
return thenable
.then(locale => locale || defaultLocale)
.catch(() => defaultLocale);
});
module.exports.sync = mem((options = defaultOptions) => {
const envLocale = getEnvLocale();
let res;
if (envLocale || options.spawn === false) {
res = getLocale(envLocale);
} else {
try {
res = process.platform === 'win32' ? getWinLocaleSync() : getUnixLocaleSync();
} catch (_) {}
}
return res || defaultLocale;
});
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