Allow bundling from node.js or with new gulp task bundle-to-stdout

[snapwich]

Type of change

• Feature

Description of change

Can be used in node.js like so:

var nodeBundle = require('./gulpfile.js');

nodeBundle(['rubiconBidAdapter', 'currency'])
  .then(output => console.log(output));  // string representation of prebid.js

Or can print the bundle to stdout like so:

gulp bundle-to-stdout --modules=rubiconBidAdapter,currency > prebid.js

[matthewlane]

gulp build with this change results in
build/dist/prebid.js 62K

vs on master at 598817f
build/dist/prebid.js 338K

looks like all modules are getting included on master but not in the PR? To be expected?

[snapwich]

@matthewlane no, that is a bug. should be fixed now. good catch.

[korziee]

Hey guys, sorry to comment here. We're trying to generate prebid bundles programmatically, and we're having any issue with the nodeBundle function, I did create an issue but it was never responded to.

When I run the following:

const nodeBundle = require('prebid.js/gulpfile.js')

nodeBundle(['rubiconBidAdapter'])
  .then((x) => {
    console.log(x);
  })
  .catch((e) => {
    console.error(e);
  })

All I get is some console messages and then it instantly exits the process.

kory-mbp:prebidTest kory$ node test.js
[09:48:29] Concatenating files:
 [ '/Users/kory/Publift/testing/prebidTest/node_modules/prebid.js/build/dist/prebid-core.js',
  '/Users/kory/Publift/testing/prebidTest/node_modules/prebid.js/build/dist/rubiconBidAdapter.js' ]
[09:48:29] Appending pbjs.processQueue();
[09:48:29] Generating bundle: prebid.js
(node:19939) ExperimentalWarning: The http2 module is an experimental API.

Nothing is built, or logged.

Node version: v8.11.2
NPM version: 5.6.0
OS: MacOS
Prebid Version: 1.12.0

Would really love some feedback on this, happy to submit a PR if given some direction. @snapwich