Allow specifying which groups under [project.optional-dependencies] are considered development dependencies

[fpgmaas]

PR Checklist

• A description of the changes is added to the description of this PR.
• If there is a related issue, make sure it is linked to this PR.
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

Description of changes

For projects that use PEP 621 without Poetry or PDM, all dependencies under [project.dependencies] and [project.optional-dependencies] are extracted as regular dependencies. This PR adds the --pep621-dev-dependency-groups argument, so users can specify which groups defined under [project.optional-dependencies] should be treated as development dependencies instead.

For example, consider a project with the following pyproject.toml:

[project]
...
dependencies = [
    "httpx",
]

[project.optional-dependencies]
test = [
    "pytest < 5.0.0",
]
plot = [
    "matplotlib",
]

By default, https, pytest and matplotlib are extracted as regular dependencies. By specifying --pep621-dev-dependency-groups=test,
the dependency pytest will be considered a development dependency instead.

[codecov]

Codecov Report

Attention: Patch coverage is 91.89189% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 90.7%. Comparing base (3efc505) to head (a394966).

Files	Patch %	Lines
python/deptry/core.py	81.2%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #628     +/-   ##
=======================================
+ Coverage   90.4%   90.7%   +0.3%     
=======================================
  Files         33      33             
  Lines        970     986     +16     
  Branches     189     198      +9     
=======================================
+ Hits         877     895     +18     
+ Misses        79      74      -5     
- Partials      14      17      +3     

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[adamtheturtle]

This works for my project, vws-python-mock.

[adamtheturtle]

Perhaps deptry should warn / error if the given group does not exist.

[fpgmaas]

Perhaps deptry should warn / error if the given group does not exist.

Good suggestion! It will now display a warning if there are any groups listed that are not detected:

Warning: Trying to extract the dependencies from the optional dependency groups ['lint'] as development dependencies, but the following groups were not found: ['lint']

[adamtheturtle]

I'd be happy with this being released :)

[fpgmaas]

I'd be happy with this being released :)

We'll aim for a release this weekend! I want to give @mkniewallner some more time to review if he wants, I know he is a bit busy these days :)

[mkniewallner]

Since PDM also is able to define PDM 621 optional dependencies, I think we should handle the new parameter for it as well. I made #637 to handle that, let me know if you disagree with that (if not, we still have to fix the logging issues that the PR also fixes).

In any case, having this new option will definitely be helpful!

[fpgmaas]

Since PDM also is able to define PDM 621 optional dependencies, I think we should handle the new parameter for it as well. I made #637 to handle that, let me know if you disagree with that (if not, we still have to fix the logging issues that the PR also fixes).

In any case, having this new option will definitely be helpful!

Thanks, great suggestion and good catch on the issue with logging. I merged your PR and added one small commit on top of it.