function(user, identifier, revisionIdentifier, target, out, cb) {
    logger.info('preview revision: ' + identifier + ', ' + revisionIdentifier + ' ' + target);
    deployRevision(user, identifier, revisionIdentifier, target, 'preview', out, function(err) {
      cb(err, {plan: out.getPlan(), ops: out.operations()});
    });
  }
function(user, identifier, revisionIdentifier, target, out, cb) {
    logger.info('preview revision: ' + identifier + ', ' + revisionIdentifier + ' ' + target);
    deployRevision(user, identifier, revisionIdentifier, target, 'preview', out, function(err) {
      cb(err, {plan: out.getPlan(), ops: out.operations()});
    });
  }
function ( user , identifier , revisionIdentifier , target , out , cb ) { logger . info ( 'preview revision: ' + identifier + ', ' + revisionIdentifier + ' ' + target ) ; deployRevision ( user , identifier , revisionIdentifier , target , 'preview' , out , function ( err ) { cb ( err , { plan : out . getPlan ( ) , ops : out . operations ( ) } ) ; } ) ; }
preview a system deploy
preview a system deploy