Test rustler_mix generated files

[evnu]

This pull request adds a shell script to test that the files generated by rustler_mix work when used to create a new crate. I fixed some small issues while implementing the script, and extended the mix task to allow specifying the module, name and otp app on the command line.

[evnu]

@scrogson I wonder why there does not seem to be CI running for this PR.

[scrogson]

👍

Just noticed in the shell script there are 4 spaces instead of 2 in the last bit.

[scrogson]

I wonder why there does not seem to be CI running for this PR.

That's odd.

[scrogson]

Oh...maybe it has to do with it being your fork? I've been making PRs against the real repo. So maybe the GitHub actions config needs tweaking?

[NobbZ]

on: push means on pushing to the repo directly, if you want to have the CI run on pushes to the repository and on pull requests, you need to on: [push, pull_request] (or was it pr?).

[scrogson]

on: push means on pushing to the repo directly, if you want to have the CI run on pushes to the repository and on pull requests, you need to on: [push, pull_request] (or was it pr?).

@NobbZ, yeah, but I've noticed that when you use on: [push, pull_request] everything is run twice (once for the push and once for pull_request).

[evnu]

yeah, but I've noticed that when you use on: [push, pull_request] everything is run twice (once for the push and once for pull_request).

I think we should do that for now, I already broke CI here without realizing it (fix in #268).