Revert "move back to setuptools (#367)"

[vishwin]

Fixes #340, again

flit_core and installer are now mature enough to bootstrap themselves. Needed to enable a setuptools-free bootstrap environment and avoid circular dependencies.

This reverts commit 14ad352.

Signed-off-by: Charlie Li [email protected]

[brettcannon]

@pradyunsg should we accept this and do a separate port over to PEP 621? And where do you want the version to live: __init__.py or pyproject.toml?

[pradyunsg]

I'm fine with doing it in one shot or two. I have a mild preference for putting the version in __init__.py but don't feel strongly either way. :)

[brettcannon]

@vishwin would you mind addressing the linting errors?

[vishwin]

I'll try, and probably just PEP-621 it in the process

[rossburton]

Is there any progress on this or #546?

[brettcannon]

@rossburton I'm waiting to see if #546 goes anywhere before considering this PR.

[nanonyme]

@brettcannon seems #546 is reasonably mature at this point, pending final review. Probabaly worth focusing on that at this point.

[pradyunsg]

Given that #546 is approved and this one has merge conflicts, I'm gonna go ahead and close this out.

Thanks for filing this @vishwin! ^>^