windows-registry.js

var Path = require('path');

var getRegCommand = function() {
  var command = 'reg.exe';
  if (process.env.SystemRoot) {
    command = Path.join(process.env.SystemRoot, 'System32', command);
  }

  return command;
}

var runAsAdmin = function(args, callback) {
  var isAdmin = true;
  return runInternal(isAdmin, args, callback);
}

var run = function(args, callback) {
  var isAdmin = false;
  return runInternal(isAdmin, args, callback);
}

// TODO: take runAsAdmin?
var runInternal = function(isAdmin, args, callback) {
  var runas = require('runas');

  var command = getRegCommand();
  var options = {admin: isAdmin, catchOutput: true};
  var result = runas(command, args, options);

  if (result.exitCode === 0) {
    callback();
  } else {
    var message = 'Registry updated failed: ' + result.exitCode;
    if (result.stderr) {
      message += '\n' + result.stderr;
    }
    if (result.stdout) {
      message += '\n' + result.stdout;
    }
    callback(new Error(message));
  }
}

var sequenceRuns = function(args, callback) {
  if (args.length === 0) { return callback(); }
  var first = args[0];
  var rest = args.slice(1, args.length);

  return run(first, function(err) {
    if (err) { return callback(err); }
    sequenceRuns(rest, callback);
  });
};

var add = function(key, vals) {
  var args = [key].concat(vals);
  args.unshift('add');
  args.push('/f');
  return args;
}

var key = function(pieces) {
  return pieces.join('\\');
}

var val = function(k, v) {
  return ['/v', quoted(k), '/d', quoted(v)];
}

var defaultVal = function(v) {
  return ['/ve', '/d', quoted(v)];
}

var quoted = function(s) {
  return '"' + s + '"';
}

var path = function(p) {
  return p.replace(/\\/g, '\\\\');
}

module.exports = {
  getRegCommand: getRegCommand,
  run: run,
  runAsAdmin: runAsAdmin,
  sequenceRuns: sequenceRuns,
  key: key,
  val: val,
  defaultVal: defaultVal,
  quoted: quoted,
  path: path,
  add: add,
}