text: #!/usr/bin/env node
  
  /*
   *
   * Copyright 2014 Canonical Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   *
  */
  var Q = require('q');
  var colors = require('colors');
  var shell = require('shelljs');
  
  var config = require('./config');
  var logger = require('./logger');
  
  module.exports.cp = function(source, dest) {
      var cmd = 'cp -Rf ' + source + ' ' + dest;
      logger.debug(cmd);
  
      if (shell.cp('-r', source, dest) === null) {
          logger.error(cmd + " FAILED".underline);
          process.exit(1);
      }
  };
  
  module.exports.pushd = function(dir) {
      logger.debug('pushd ' + dir);
      shell.pushd(dir);
  };
  
  module.exports.popd = function(dir) {
      logger.debug('popd');
      shell.popd();
  };
  
  module.exports.execSync = function(cmd, silent) {
      logger.debug(cmd);
  
      silent = (typeof silent === 'boolean') ? silent : !config.inVerboseMode();
      var res = shell.exec(cmd, { silent: silent });
      if (res.code !== 0) {
          logger.error(cmd.green + " " + "FAILED".underline);
          logger.error(res.output);
  
          if (!config.inVerboseMode()) {
              logger.warn('Try running the task again with --verbose for more logs.');
              logger.warn('Example: nodekit run -- --verbose');
          }
  
          process.exit(1);
      }
  
      return res;
  };
  
  module.exports.execAsync = function (cmd, silent) {
      logger.debug(cmd);
  
      var deferred = Q.defer();
      silent = (typeof silent === 'boolean') ? silent : !config.inVerboseMode();
      shell.exec(cmd, { async: true, silent: silent }, function (code, output) {
          var res = { code: code, output: output };
          if (res.code !== 0) {
              logger.error(cmd.green + " " + "FAILED".underline);
              logger.error(res.output);
  
              if (!config.inVerboseMode()) {
                  logger.warn('Try running the task again with --verbose for more logs.');
                  logger.warn('Example: nodekit run -- --verbose');
              }
  
              process.exit(1);
          }
          deferred.resolve(res);
      });
  
      return deferred.promise;
  };
  