How to use promzard - 3 common examples

return new Promise((resolve, reject) => {
    // Path to promzard config file
    var promzardConfig;
    ctx.config = npmConfig;
    // Default to auto config
    promzardConfig = path.join(resources, 'init-default.js');
    if (options.interactive) {
      promzardConfig = path.join(resources, 'init-config.js');
    }

    // Init promozard with appropriate config.
    var pz = new PZ(promzardConfig, ctx);

    // On data resolve the promise with data
    pz.on('data', data => {
      if (!pkg) {
        pkg = {};
      }
      Object.keys(data).forEach(function(k) {
        if (data[k] !== undefined && data[k] !== null) {
          pkg[k] = data[k];
        }
      });

      log.info('Created "package.json".');
      resolve(data);
    });

if (er) pkg = {}
    else pkg = d

    ctx.filename = packageFile
    ctx.dirname = path.dirname(packageFile)
    ctx.basename = path.basename(ctx.dirname)
    if (!pkg.version || !semver.valid(pkg.version))
      delete pkg.version

    ctx.package = pkg
    ctx.config = config || {}

    // make sure that the input is valid.
    // if not, use the default
    var pz = new PZ(input, ctx)
    pz.backupFile = def
    pz.on('error', cb)
    pz.on('data', function (data) {
      Object.keys(data).forEach(function (k) {
        if (data[k] !== undefined && data[k] !== null) pkg[k] = data[k]
      })

      // only do a few of these.
      // no need for mans or contributors if they're in the files
      var es = readJson.extraSet
      readJson.extraSet = es.filter(function (fn) {
        return fn.name !== 'authors' && fn.name !== 'mans'
      })
      readJson.extras(packageFile, pkg, function (er, pkg) {
        readJson.extraSet = es
        if (er) return cb(er, pkg)

if (er) pkg = {}
    else pkg = d

    ctx.filename = packageFile
    ctx.dirname = path.dirname(packageFile)
    ctx.basename = path.basename(ctx.dirname)
    if (!pkg.version || !semver.valid(pkg.version))
      delete pkg.version

    ctx.package = pkg
    ctx.config = config || {}

    // make sure that the input is valid.
    // if not, use the default
    var pz = new PZ(input, ctx)
    pz.backupFile = def
    pz.on('error', cb)
    pz.on('data', function (data) {
      Object.keys(data).forEach(function (k) {
        if (data[k] !== undefined && data[k] !== null) pkg[k] = data[k]
      })

      // only do a few of these.
      // no need for mans or contributors if they're in the files
      var es = readJson.extraSet
      readJson.extraSet = es.filter(function (fn) {
        return fn.name !== 'authors' && fn.name !== 'mans'
      })
      readJson.extras(packageFile, pkg, function (er, pkg) {
        readJson.extraSet = es
        if (er) return cb(er, pkg)