browser-launcher/lib/create_profiles.js

var mkdirp = require('mkdirp');
var path = require('path');
var spawn = require('child_process').spawn;

module.exports = function (avail, configDir, cb) {
    var pending = avail.length;
    if (pending === 0) cb();
    
    avail.forEach(function (br) {
        if (br.type === 'firefox' && br.profile) {
            createFirefox(br.command, function (err, profile) {
                if (err) return cb(err);
                br.profile = profile;
                if (--pending === 0) cb();
            });
        }
        else if (br.profile) {
            var dir = br.profile = makeDir(br.name, br.version);
            mkdirp(dir, function (err) {
                if (err) return cb(err);
                if (--pending === 0) cb();
            });
        }
        else if (--pending === 0) cb()
    });
    
    function makeDir (name, v) {
        var d = name + '-' + v + '_' + Math.random().toString(16).slice(2);
        return path.join(configDir, d);
    }
};

function createFirefox (name, cb) {
    var profileName = 'browser-launcher-' + Math.random().toString(16).slice(2);
    var args = [ '--no-remote', '-CreateProfile', profileName ];
    var ps = spawn(name, args);
    
    var data = '';
    ps.stdout.on('data', function (buf) { data += buf });
    ps.stderr.on('data', function (buf) { data += buf });
    
    ps.on('exit', function (code) {
        if (code !== 0) {
            return cb(name + ' ' + args.join(' ')
                + ' exited with code ' + code + ': ' + data
            );
        }
        var m = data.match(/^Success: created profile '[^']+' at '([^']+)/m);
        if (!m) cb('Unexpected data: ' + data)
        else cb(null, { name : profileName, file : m[1] })
    });
}