`flit` and `flit_core` can be out of sync

[pmeier]

For example

$ pip install flit==3.6.0
[...]
$ python -c "import flit_core; print(flit_core.__version__)"
3.7.0

This was detected, because the 3.7.0 release broke some build workflows (still investigating what exactly happened, see omnilib/ufmt#56) although flit==3.6.0 is pinned.

[takluyver]

Sorry about that.

I'm not sure that 'out of sync' is really the problem, though - I think the changes in #499 may simply have broken it for you.

I don't think your pinning in requirements-dev.txt affects this at all: pre-commit uses pip install . which will look at pyproject.toml, and set up an isolated build environment with flit_core according to the [build-system] table.

[pmeier]

I don't think your pinning in requirements-dev.txt affects this at all: pre-commit uses pip install . which will look at pyproject.toml, and set up an isolated build environment with flit_core according to the [build-system] table.

True. The pinning would only solve this for the development environment.

[takluyver]

The breakage you're seeing has just been reported as #530. I'll leave this one open for the lower-priority discussion about what the dependency relationship between flit and flit_core should be.