- Initially suport es6 native modules

[vpotseluyko]

From node v8.8.1 we received unstable es6 modules support with flag --experimental-modules.
(more about it here: https://nodejs.org/api/esm.html)

Es6 modules has broken code which depends on commonJS module system. This pull request allows initially with some hacks support es6 modules.

Note: this provides full backward compatibility with CommonJS project.
Note: I'd hope this will be included in next pmx release - while es6 modules are still experimental feature they are worse supporting right now.
I was not really sure where and how shall I pull request it. Hope dev branch was the right choice.
I created simple project for demonstrating es6 modules usage: https://github.com/vpotseluyko/test-es6-pm2

[CLAassistant]

All committers have signed the CLA.

[vpotseluyko]

Travis CI tests failed on Node 4. It looks like that tests failed for reasons that I didn't really touch

[vpotseluyko]

Cause it's not too obvious from PR desription I'd rather explain one more time:
In es6 modules enviroment were deprecated:

1. module variable
2. __dirname && __filename variables
3. require variable
   It's not bugs, it's expected behaviour, and it will be so up to release stable versions. Meanwhile we can start preparing our projects for esm right now.
   Pmx is part of world popular app launcher, and I hope that u can provide initial es6 support as fast, as possible.
   My code provides a couple of hacks based on relative pathes and standart values. I didn't write programmatic tests for them, cause I have no time, but they work - and u can test it.
   As u can see my code is applied only if module || require vars are undefined, that's why it's fully backward compatible. Moreover, it doesn't change pmx api at all
   Of course, full esm support must be made more carefully - but I really hope that some small workaround mentioned as possibly unstable and experimental could be provided right now.

[vmarchaud]

We will look into this in the week, no worries we will try to make a patch as fast as possible

[Unitech]

Awesome, thanks a bunch @vpotseluyko for the PR and test project, digging in right now

[SteveCruise]

mark, wait for fix

[johnwebbcole]

Any idea for a release date on this?

[vpotseluyko]

+1

[neyasov]

+1