not every GroupCommand needs to be an EnvCommand

[dimbleby]

Relating to #6275 and python-poetry/poetry-plugin-export#78

Not every GroupCommand needs to be an EnvCommand (though it's true that every GroupCommand in this repository is also an EnvCommand, so this refactoring changes nothing here).

The intention is to make a change to the export plugin so that the ExportCommand can be a GroupCommand but not an EnvCommand: it does need access to the group options, but it does not need a virtual environment.

[dimbleby]

Arguably not every InstallerCommand should need to be an EnvCommand eg SelfCommand shouldn't, per #6225. Perhaps an improved version of that fix would be to take EnvCommand off the InstallerCommand and add it back only on the commands that actually need it.

Another day, maybe...

[dimbleby]

actually let's do that while we're here, you can always reject the second commit if it's too much

[dimbleby]

ugh no, the SelfCommand is messier than I thought, let's just do the one thing after all.

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.