Includes multiple changes to the shifter task to simplify and
support this:
* Use grunt.file for shifter yui 'module' detection rather than our own
70 line function
* Use grunt.util.spawn rather than our own exec for shifter
* Improve behaviour on various yui subdirectories
We have to add the 'async' depndency to npm because we are running
multiple async operations in the single task. We use async.eachSeries to
run each shifter job sequentally (else the output would be unreadable
when running async).
We also run shifter in non-recursive mode on the module directory so its
not building everything (thanks to Ryan for pointing this out!)
A) Remove direct dependency on uglify-js:
This dependency was added in MDL-50277, but it isn't quite correct, the
way npm installs dependencies means that grunt-contrib-uglify *could* use
'our' version if its satisifed. But does not *always* and especially does
not if the grunt-contrib-uglify requirement is higher than ours.
Long story short, in many cases this means that this is used:
node_modules/grunt-contrib-uglify/node_modules/uglify-js
But this is not:
node_modules/uglify-js
In MDL-50277 we thought we were making the version sticky, but in
reality we were just fixing previous problems by updating
grunt-contrib-uglify to a version which fixed a bug:
https://github.com/gruntjs/grunt-contrib-uglify/issues/313
It seems the better solution will come with using npm shrinkwrap to lock
down depdencies.
B) Bump grunt-contrib-uglify to 0.11.0
This moves us to uglify-js ~2.6.0 - which doens't change any output
files.
This version of grunt-contrib-jshint itself uses a better fixed
requirement on "~2.8.0" rather than "^2.8.0" which was giving variable
results with some people updating to 2.9-rc1.
See also https://github.com/gruntjs/grunt-contrib-jshint/pull/219
Previously we were using recess to build bootstrap base as it was what
was used by the original project. But recess is no longer maintained.
Now we use grunt for building js, it makes sense to use it for less too.
(If you really don't want to use grunt, you almost certainly can just
use lessc -x as it uses the same less.js on backend).
In order to produce a consistent build across the board, we must hardcode
several package versions. We must additionally specify compatible
versions for any sub-dependency that we have a requirement upon.
In this instance, the only sub-dependency which has an effect upon the
overall output is grunt-contrib-uglify's dependency upon uglify-js.
Since change in uglify-js may lead to changes in the generated output, we
must specify a fixed version of that dependency. That version must be
compatible with the dependency signature for grunt-contrib-uglify or the
dependency manager will just download a different version.
This issue also bumps the version of uglify-js to a version which changes
the output. This is the latest version at time of commit.
