[WIP] Multiple packages using Lerna

Created by: peternewnham

Here's an early proof of concept of how splitting into multiple packages using Lerna could work (#23557 (closed))

Created 3 packages located in the packages directory:

• bootstrap
  • devDependency on the css and jquery packages below
  • should be backwards compatible with current bootstrap package
• css (scss and css only)
• jquery (jquery plugins only)

Usage:

• Install Lerna (npm i -g lerna)
• Run lerna bootstrap to initialise and link dependencies between packages Runlerna run build` to run the build script for each package

Demos of them in action (published to a temporary scope):

• Full Bootstrap package (css + jquery) - https://jsfiddle.net/hpm0ku0c/1/
• CSS only - https://jsfiddle.net/n81gadbt/1/

To Do:

• Decide on package names
  • scoped (@twbs/css) vs flat (bootstrap-css)
  • Consistent names between platforms Bootstrap is published on (npm, packagist, nuget... etc)
• Restructure rest of project and run scripts to work with the new format
• Consider the way the combined bootstrap package is generated (may be a better way than just copying files from it's dependencies?)
• Probably lots of other things I've not thought about

CC: @XhmikosR