[wip] Grunt -> Gulp

[zertosh]

Fixes #4927

[facebook-github-bot]

@zertosh updated the pull request.

[facebook-github-bot]

@zertosh updated the pull request.

[facebook-github-bot]

@zertosh updated the pull request.

[facebook-github-bot]

@zertosh updated the pull request.

[zpao]

cc @nickdima.

@zertosh - is this something you're going to continue working on? I think @nickdima had also started so I'd like to make sure we aren't wasting anybody's time…

[zertosh]

@zpao, this is the first pass, where it's mostly a 1:1 grunt to gulp port. the 2nd pass will be to improve things once they're in gulp (e.g. not spawning processes for linting, jest, etc... reuse result streams instead of reading from disk). I worked on this this weekend, and I can wrap it up next week. Not sure how much @nickdima has already.

[nickdima]

I didn't have too much time yet to actually implement something, just figuring out everything that's going on with the current build process alone took quite some time. :)
@zertosh your approach sounds good. I'll follow this PR in case I can help with anything.

[jimfb]

No activity in a couple of months, all checks failed, merge conflicts. I'm going to close this out. We can re-examine if/when the PR is in a better state.

[zertosh]

😊 totally forgot about this PR... i don't want to abandon it. i'll open a new one