@talend/scripts-core

Talend Scripts

Description

This project, inspired by react-scripts and kcd-scripts, aims to abstract all tools and configuration from your project.

It will expose basic scripts:

• start
• test
• build
• lint
• lint-merge-report

By default no configuration is needed (except for lint-merge-report) but you can at any time create a configuration file and extends from the default config.

talend-scripts will detect the kind of package you are in.

• app: if you have src/app folder
• lib: if not an app
• angular: if there is a dependencies on angularjs
• public project: you have a publishConfig: { access : 'public' } in your package.json

Depending on this the sub command will use a real command like webpack and apply either custom configuration or default configuration.

command	app	lib	angular
build	webpack	babel
lint	eslint + stylelint	eslint + stylelint
test	jest	jest	karma
start	webpack	start-storybook

Table of content

Basic usage

1. Getting started

Advanced

3. config customisation

Possible issues

Build

While building a huge app, you can run into a JavaScript heap out of memory, espacially on production mode, with webpack optimisation and sourcemap. You can increase the node space size to overcome this issue.

Package.json

{
	"scripts": {
		"build": "NODE_OPTIONS=--max_old_space_size=4096 talend-scripts build"
	}
}

Test

@talend/scripts-core uses jest to run tests. On mac and watch mode, if you have a lot of files to watch, you can bump into this error

$ jest --watch
2016-09-22 10:49 node[79167] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2016-09-22 10:49 node[79167] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
2016-09-22 10:49 node[79167] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)
events.js:160
      throw er; // Unhandled 'error' event
      ^

Error: Error watching file for changes: EMFILE
    at exports._errnoException (util.js:1036:11)
    at FSEvent.FSWatcher._handle.onchange (fs.js:1406:11)

The issue is well known, still not fixed in the lib or any of its dependencies. This github issue brings you a lot of info.

As a workaround, consider installing watchman.

brew install watchman

Extra scripts

We have added two scripts to be as simple as possible