cli.js
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#!/usr/bin/env node
var browserslist = require('./');
var pkg = require('./package.json');
var args = process.argv.slice(2);
function isArg(arg) {
return args.some(function (str) {
return str === arg || str.indexOf(arg + '=') === 0;
});
}
function getArgValue(arg) {
var found = args.filter(function (str) {
return str.indexOf(arg + '=') === 0;
})[0];
var value = found && found.split('=')[1];
return value && value.replace(/^['"]|['"]$/g, '');
}
function error(msg) {
process.stderr.write(pkg.name + ': ' + msg + '\n');
process.exit(1);
}
function query(queries, opts) {
try {
return browserslist(queries, opts);
} catch (e) {
if ( e.name === 'BrowserslistError' ) {
return error(e.message);
} else {
throw e;
}
}
}
if ( args.length === 0 || isArg('--help') || isArg('-h') ) {
process.stdout.write([
pkg.description,
'',
'Usage:',
' ' + pkg.name + ' "QUERIES"',
' ' + pkg.name + ' --coverage "QUERIES"',
' ' + pkg.name + ' --coverage=US "QUERIES"',
' ' + pkg.name + ' --config=browserslist "path/to/browserlist/file"',
' ' + pkg.name + ' --env="environment name defined in config"',
' ' + pkg.name + ' --stats="path/to/browserlist/stats/file"'
].join('\n') + '\n');
} else if ( isArg('--version') || isArg('-v') ) {
process.stdout.write(pkg.name + ' ' + pkg.version + '\n');
} else if ( isArg('--coverage') || isArg('-c') ) {
var browsers = args.find(function (i) {
return i[0] !== '-';
});
if ( !browsers ) error('Define a browsers query to get coverage');
var country = getArgValue('--coverage') || getArgValue('-c');
var result = browserslist.coverage(query(browsers), country);
var round = Math.round(result * 100) / 100.0;
var end = 'globally';
if (country && country !== 'global') {
end = 'in the ' + country.toUpperCase();
}
process.stdout.write(
'These browsers account for ' + round + '% of all users ' + end + '\n');
} else if ( args.length === 1 && args[0][0] !== '-' ) {
query(args[0]).forEach(function (browser) {
process.stdout.write(browser + '\n');
});
} else if (isArg('--config') || isArg('-b')) {
var opts = {
config: getArgValue('--config') || getArgValue('-b')
};
if (isArg('--env') || isArg('-e')) {
opts.env = getArgValue('--env') || getArgValue('-e');
}
if (isArg('--stats') || isArg('-s')) {
opts.stats = getArgValue('--stats') || getArgValue('-s');
}
query(null, opts).forEach(function (browser) {
process.stdout.write(browser + '\n');
});
} else {
error('Unknown arguments. Use --help to pick right one.');
}