This is for automatically converting old predefined app templates to new ones.

oldToNewConfig-app-templates.js

// Usage:  node --harmony <filename>.js path=./templates/apps/predefined/
// Templates from <3.2 to new template structure in 3.3
var uuid = require('node-uuid');
var fs = require('fs');
var paths = [];
var fileExt = require('path');

process.argv
  .filter( (arg, i) => {
    if (arg.indexOf('path') !== -1) {
      return true;
    }
    return false;
  })
  .forEach((pathArg) => paths = pathArg.split('=')[1].split(',').concat(paths));

paths.forEach(fetchAndConvertJsons);

function fetchAndConvertJsons(path) {
  console.log('pathL ', path);
  var files = fs.readdir(path, (err, files) => {
    console.log('files: ', files);
    files.forEach(file => {
      if (fileExt.extname(file) === '.json' && file !== 'config.json') {
        fs.readFile(path + '/' + file , 'utf-8', (err, content) => {
          if (err) throw err;
          fs.writeFile(path + '/' + file, JSON.stringify(convertOldAppTemplates(content), null, 2), (err) => {
            console.log('File ' + path + '/' + file + ' written successfully');
          });
        });
      }
    });
  });
}

function convertOldAppTemplates(content) {
  var newContent = JSON.parse(content);
  var config = newContent.config;
  var source = config.source;
  var sinks = config.sinks;
  var transforms = config.transforms;
  var defaultArtifact = {
    name: 'cdap-etl-lib',
    scope: 'SYSTEM',
    version: '3.3.0-SNAPSHOT'
  };
  source.label = source.label || source.name;
  source.artifact = source.artifact || defaultArtifact;
  var modifiedSource = { name: source.name + '-' + uuid.v4(), plugin: source };
  var modifiedSinks = sinks.map( (sink) => {
    sink.label = sink.label || sink.name;
    sink.artifact = sink.artifact || defaultArtifact;
    return { name: sink.name + '-' + uuid.v4(), plugin : sink };
  });
  var modifiedTransforms = transforms.map( (transform) => {
    transform.label = transform.label || transform.name;
    transform.artifact = transform.artifact || defaultArtifact;
    return { name: transform.name + '-' + uuid.v4(), plugin: transform };
  });
  config.source = modifiedSource;
  config.sinks = modifiedSinks;
  config.transforms = modifiedTransforms;
  if (newContent.ui) {
    delete newContent.ui;
  }
  return addConnections(newContent);
}

function addConnections(configJson) {
  var sourceNode = configJson.config.source;
  var connections = [];
  var nodes = configJson.config.transforms.concat(configJson.config.sinks);
  var i;
  connections.push({
    from: sourceNode.name,
    to: nodes[0].name
  })
  for (i =0; i< nodes.length - 1 ; i++) {
    connections.push({
      from: nodes[i].name,
      to: nodes[i+1].name
    });
  }
  configJson.config.connections = connections;
  return configJson;
}