Add support for package version defined as tuple

[jlorieau]

Description

I have a python project "mypkg" with the source code in the mypkg directory of the root project.

My version is stored as a tuple in mypkg.__init__.py such that it can be imported as follows:

>>> import mypkg
>>> print(mypkg.__version__)
(0, 8, 1)

I have setup towncrier to recognize my package name in my pyproject.toml file.

[tool.towncrier]
package = "mypkg"

I did not specify the package_dir since it is the same as my package name.

Additionally, I have created the templates and stubs as described in the tutorial.

When I try to create a draft build, an exception is raised that a tuple version is unsupported.

$ towncrier build --draft
Loading template...
Finding news fragments...
Rendering news fragments...
Traceback (most recent call last):
...
TypeError: Unsupported type for __version__: <class 'tuple'>

Expected behavior

I expect the package name and package version (tuple) to be correctly processed when running towncrier build --draft or towncrier build.

I can circumvent this exception by specifying the package name towncrider build --draft --name mypkg, even though the above command has correctly found and loaded my package.

Looking at the _project.py and build.py code, there appears to be a 2 different ways for versions to be loaded.

1. get_project_name, which does not support tuple __version__

2. get_version, which does support tuple __version__.

I believe the fix will simplify require get_project_name to call get_version in the event that a tuple version is returned.

[adiroiban]

Thanks for the report.

I don't know what to say.

I suggest closing this as won't fix and instead try to get the importlib.metadata PR merged
#502

But if you want to create a PR to add direct support for tuple, I think that we can also merge it.

[jlorieau]

Thank you @adiroiban for the note. I think the PR #502 solution would be most elegant, so I'll set it as wontfix. Sorry I missed that PR.