try terser as JS minifier

[melizeche]

just a draft, @jorgeramirez @juanhuttemann can you guys tests if this approach is valid for #261 ?
reqs:
npm install -g terser

ref:
https://django-pipeline.readthedocs.io/en/latest/compressors.html#example

[jorgeramirez]

@melizeche thanks!

I haven't tested it yet. But you could try using shutil package to discover the path to terser in a cross-platform way. For example

import shutil
print(shutil.which("yuglify"))
> '/Users/jorge/.nvm/versions/node/v8.9.1/bin/yuglify'

I'll check your changes soon. I also wonder if this tool does the "translating" part (ES6+ => ES5).

[melizeche]

it's a minifier but we don't need translate to ES5, ES6 at least const is supported since android 2.2
https://caniuse.com/#search=const
we just need not to go full ES7 features and we will be fine I think... and fuck IE
edit: I misread the comment

[juanhuttemann]

Had to change the terser binary directory because I'm using nvm
After all the assets in allstatic were generated without any problem

[melizeche]

@juanhuttemann in theory it should work fine with env as
https://github.com/melizeche/ayudapy/pull/268/files#diff-5e96265fa524caa1877f88f3c1958635R4
but didt't work on my case

[juanhuttemann]

@juanhuttemann in theory it should work fine with env as
https://github.com/melizeche/ayudapy/pull/268/files#diff-5e96265fa524caa1877f88f3c1958635R4
but didt't work on my case

fix to work on any platform

import shutil
...
TERSER_BINARY = shutil.which("terser")

[jorgeramirez]

@melizeche it works like a charm, though I used @juanhuttemann fix. I guess if you update the PR with his suggestion is good to go 👌