More minor build tweaks.

[bardiharborow]

Closes #22388. Closes #22476. Closes #22490.

[Johann-S]

Is it possible @bardiharborow to clear a bit because in logs they are all the requests logged and it's useless for us for example : https://travis-ci.org/twbs/bootstrap/jobs/223901460#L1161

[bardiharborow]

@Johann-S that's fixed in https://github.com/twbs/bootstrap/pull/22477/files#diff-b9cfc7f2cdf78a7f4b91a753d10865a2R41

[Johann-S]

Nice thank you @bardiharborow 👍

[patrickhlauke]

new build system seems borked on windows at the moment? did a completely fresh node installation, tried npm install, and it errors out

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

[wolfy1339]

@patrickhlauke that's normal on Windows, it hapens all the time.
fsevents is only for macOS/OSX

[patrickhlauke]

@wolfy1339 didn't happen in previous build system. ok, as it's marked as optional, ignoring.

running npm run test it then fails (despite latest node) here

'export).*' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 255
npm ERR! [email protected] js-compile-bundle: `shx cat js/src/util.js js/src/alert.js js/src/button.js js/src/carousel.js js/src/collapse.js js/src/dropdown.js js/src/modal.js js/src/scrollspy.js js/src/tab.js js/src/tooltip.js js/src/popover.js | shx sed 's/^(import|export).*//' | babel --filename js/src/bootstrap.js | node build/stamp.js > dist/js/bootstrap.js`

(sorry, not trying to be difficult...just hoping these can be resolved and these cryptic messages mean something to you folks, as i'm hopelessly lost in this command line stuff and just want to get back to a working build environment to tackle some issues :) )

[Johann-S]

@patrickhlauke fixed in this PR, also reported by me

[patrickhlauke]

@Johann-S ah ok cool. it's all greek to me, so not even tried checking this PR out. i'll hang fire in hopes that it gets merged soon...

[Johann-S]

@bardiharborow How can I use watch task in our new build system ? Because it's an convenient task and I'm afraid this task is missing 😨

[bardiharborow]

@patrickhlauke hey, sorry for breaking Windows support, that was not very well tested from my end. I'm merging this now. Please ping me if there's anything else broken. I might try to get hold of a Windows box to test as well.

[patrickhlauke]

@bardiharborow sorry, was being more cranky then usual there. will give this a whirl and report back in a happier mood :)

(wrangling with the command line does that to me...)

[patrickhlauke]

just tested. npm run test runs smooth now, but fails at linting stage

[htmllint] found 256 errors out of 102 files

are the linting rules new/changed in this new build process?