browser-launcher/lib/windows/ff.js

detect and launch browser versions, headlessly or otherwise

var exec = require('child_process').exec;
var qryVersion = 'reg query "HKEY_CURRENT_USER\\Software\\Mozilla\\Mozilla Firefox" /v CurrentVersion';
var qryVersion2 = 'reg query "HKEY_LOCAL_MACHINE\\Software\\Mozilla\\Mozilla Firefox" /v CurrentVersion';
var qryPath = 'reg query "HKEY_CURRENT_USER\\Software\\Mozilla\\Mozilla Firefox\\" /s /v PathToExe';
var qryPath2 = 'reg query "HKEY_LOCAL_MACHINE\\Software\\Mozilla\\Mozilla Firefox\\%VERSION%\\Main\\" /s /v PathToExe';

var currentVersion;

exports.version = function(callback) {
   if (currentVersion) {
   	return callback(null, currentVersion);
   }
   exec(qryVersion, function (err, stdout) {
	var data = stdout.split('  '),
	version = data[data.length - 1].replace(/\r\n/g, '').trim();
	if (!version) {
	   exec(qryVersion2, function (err, stdout) {
		var data = stdout.split('  '),
		version = data[data.length - 1].replace('CurrentVersion', '').replace('REG_SZ', '').replace(/\r\n/g, '').trim();
		if (version) {
			currentVersion = version;
   			callback(null, version);
		} else {
		     callback('unable to determine firefox version');
		}
	   });
	} else {
		if (version) {
			currentVersion = version;
   			callback(null, version);
		} else {
		     callback('unable to determine firefox version');
		}
	}
   });
};

exports.path = function(callback) {
   exec(qryPath, function (err, stdout) {
	var data = stdout.split('\r\n'),
		ffPath;
   	data.forEach(function(line) {
	    if (/PathToExe/.test(line)) {
	    	var cmd = line.replace('PathToExe', '').replace('REG_SZ', '').replace(/"/g, '').trim();
		if (cmd) {
			ffPath = cmd;
		}
	    }
	});
	if (!ffPath) {
	   exports.version(function(err, version) {
	   	if (version) {
		   exec(qryPath2.replace('%VERSION%', version), function (err, stdout) {
			var data = stdout.split('\r\n'),
				ffPath;
			data.forEach(function(line) {
			    if (/PathToExe/.test(line)) {
				var cmd = line.replace('PathToExe', '').replace('REG_SZ', '').replace(/"/g, '').trim();
				if (cmd) {
					ffPath = cmd;
				}
			    }
			});
			if (ffPath) {
				callback(null, ffPath);
			} else {
				callback('unable to find ff path');
			}
		    });
		  } else {
			callback('unable to find ff path');
		  }
	    });
	} else {
   	   callback(null, ffPath);
	}
   });
};