Add tests for micromamba, transmutation and miniforge (continued)

[jaimergp]

Description

Continues and closes #503

Checklist - did you ...

• Add a file to the news directory (using the template) for the next release's release notes?
• Add / update necessary tests?
• Add / update outdated documentation?

[jaimergp]

@chrisburr Is mamba-org/mamba#1497 behind the errors with micromamba+miniforge+transmutation?

[jaimergp]

Two bugs surfacing if micromamba is used:

• .conda transmutation
• Shortcuts not being created on Windows (need to investigate on VM to know what's going on).

[chrisburr]

@chrisburr Is mamba-org/mamba#1497 behind the errors with micromamba+miniforge+transmutation?

I don't think so. The errors are different and I've been using transmutation+micromamba without any issues.

[jaimergp]

Got it, thanks! I'll need to investigate locally 👷

[jaimergp]

Ok, the "only" bug left now is Windows+micromamba+shortcuts. TBD.

[jaimergp]

More details about the errors:

Creating Miniforge3 menus...
The following argument was not expected: --make-menus
Run with --help for more information.
::error:: Failed to create menus

micromamba does not seem to support creating menus directly.

% micromamba.exe constructor [OPTIONS]

Options:
  -h,--help                   Print this help message and exit
  -p,--prefix TEXT            Extract the conda pkgs in <prefix>/pkgs
  --extract-conda-pkgs        Extract the conda pkgs in <prefix>/pkgs
  --extract-tarball           Extract given tarball into prefix

So we can't really test this for now. We could implement a fallback strategy via the bundled Python in base + _nsis.py integrations, but I don't want to add more coupling between the installer logic and the installer contents.

conda-forge is not using micromamba for Windows as far as I can see, so this is not critical. I'll add some documentation so people know what to expect.

[dbast]

Looks pretty good. Is the PR still in draft state or ready for review?

[jaimergp]

Yes I'll remove the draft status as soon as all is green. Hopefully this commit?

[jaimergp]

Last minute change :D Turns out --make-menus is always used on Windows, so all installers will fail there. We can change that in a future PR, but for now we'll error out if micromamba & windows are used together.

[chrisburr]

Last minute change :D Turns out --make-menus is always used on Windows, so all installers will fail there. We can change that in a future PR, but for now we'll error out if micromamba & windows are used together.

It's probably better to fix this on the mamba side: mamba-org/mamba#1215

[jaimergp]

Agreed!