Add checks for tools in test suite

[le-lenn]

This PR aims to make the test suite easier to use.

• Adds optional gfind support for macos users
• Checks if tools are present early and fails with helpful error messages if not

[m90]

I don't think the test script should normalize environments, e.g. finding out which find to use, starting such things is a very slippery slope.

I have to admit I could live with a note in the test directory's README that notes that Docker and Docker compose are required.

As for gfind I've seen people do what is described here https://formulae.brew.sh/formula/findutils

All commands have been installed with the prefix "g".
If you need to use these commands with their normal names, you
can add a "gnubin" directory to your PATH from your bashrc like:
PATH="$HOMEBREW_PREFIX/opt/findutils/libexec/gnubin:$PATH"

[le-lenn]

I understand, no problem. I'll refactor this at some point to a README update.

I really don't want to fiddle with my path just to be able to run the test suite on an open source project. I feel like this could have better DX. I haven't quite had the time to really look into how the test-suite works, but is there maybe a better alternative than a shell script which expects a bunch of tools to be installed?

[m90]

What I don't understand: the internet tells me find (the BSD version) should be installed by default on MacOS. Is this not true? Or is the problem that the test script calls find in a way that is not compatible with both BSD and GNU versions of find? If it's the latter, then the fix should be fixing the arguments passed?

[le-lenn]

Good point, I was not good at documenting. find is installed on macOS by default, but the version that is installed does not support the flags used in the test script. Sorry I’m on my phone, I believe it’s something like “max-depth” and another one. Either both or one of them is not recognized

[m90]

Would you want to find out if it's possible to do what is currently done in a way that works with both BSD and GNU versions then? I would think that's the proper fix here.

[le-lenn]

Would you want to find out if it's possible to do what is currently done in a way that works with both BSD and GNU versions then? I would think that's the proper fix here.

I agree, thanks for pushing back!

[le-lenn]

Closed in favor of #702