Support all harmony flags

[danielstjules]

Rel: #1846

This solution doesn't break the existing API - it only improves on our current situation. Rather than have to add flags to both bin/_mocha and bin/mocha each time they're introduced and publish a patch release, we'll automatically support all flags of the form --harmony* This also has the advantage of being less error prone, as some flags were supported in mocha, but not listed in_mocha and thus weren't visible via --help.

Finally, --help output will be quite a bit cleaner. Node 4.0.0 includes a few other flags we'd have to add otherwise:

  --harmony_array_includes (enable "harmony Array.prototype.includes" (in progress))
  --harmony_sloppy (enable "harmony features in sloppy mode" (in progress))
  --harmony_unicode_regexps (enable "harmony unicode regexps" (in progress))
  --harmony_reflect (enable "harmony Reflect API" (in progress))
  --harmony_destructuring (enable "harmony destructuring" (in progress))
  --harmony_sharedarraybuffer (enable "harmony sharedarraybuffer" (in progress))
  --harmony_atomics (enable "harmony atomics" (in progress))
  --harmony_new_target (enable "harmony new.target" (in progress))
  --harmony_tostring (enable "harmony toString")
  --harmony_concat_spreadable (enable "harmony isConcatSpreadable")
  --harmony_rest_parameters (enable "harmony rest parameters")
  --harmony_spreadcalls (enable "harmony spread-calls")
  --harmony_spread_arrays (enable "harmony spread in array literals")

[danielstjules]

cc @mochajs/mocha Worth pushing for a patch release? :)

[travisjeffery]

SGTM

[alekseykulikov]

Thank you @danielstjules for great patch!
Would love to see it published to npm.

[danielstjules]

Hoping we might get a patch release out this week! :)

[thom4parisot]

Amazing, I was just looking for it to be able to use --harmony_destructuring :-)

[jkresner]

I know we've moved on - but thought it interesting when I came across this thread just now and how the coffee folks dealt with the node.js flags

[danielstjules]

Interesting. I know tap offers a --harmony flag as well. If mocha specs could be ran just using node with require('mocha'), that would also solve this issue.

[danielstjules]

Happy to keep discussing this in #1846 :) I don't think we've moved on at all. I just hid the duct tape haha

[brandonros]

--harmony-async-await ?

(for anybody trying to find)

Edit: mocha --harmony_async_await