dynamic = ["version"] in new pyproject.toml build

[nschloe]

I'm testing the brand-new pyproject.toml build backend.

[build-system]
requires = [
  "setuptools @ git+https://github.com/pypa/setuptools",
]
build-backend = "setuptools.build_meta"

When using

[project]
# ...
dynamic = ["version"]

the version is always set to 0.0.0, so I guess setuptools doesn't pick it up from the packages __version__. Fair enough, I've never told it so. How can I though?

(So far, I've always used flit which does it automatically.)

[abravalheri]

Hi @nschloe thank you very much for trying it out.

To get the version from an attribute you can use:

[tool.setuptools.dynamic]
version = {attr = "mymodule.__version__"}

[nschloe]

I haven't quite figured it out yet. The version is specified as

__version__ = "1.2.3"

in src/mymodule/__about__.py (from where it's imported in __init__.py). Your suggestion results in

AttributeError: module '__init__' has no attribute 'mymodule:__version__'

Any idea why?

[abravalheri]

Sorry, that was my bad, my example was wrong. The correct form is mymodule.__version__.

(: vs .)

[nschloe]

Yup, that works. Thanks! I'll keep testing.

[abravalheri]

Thank you for testing!

[CDWimmer]

Doing this makes build try to import mymodule to fetch __version__, but due to it making its own venv temporarily in the process it doesn't have any of the extra modules in it, e.g. requests, so it fails in my case. How should this be tackled?

edit: capitalised "version" in one place but not the other... issue exists between keyboard and chair