Update from setup.py to pyproject.toml

[jsf9k]

🗣 Description

This pull request updates our project packaging configuration from using a setup.py file to using a pyproject.toml file with a hatchling build backend.

💭 Motivation and context

Resolves #163.

🧪 Testing

All automated tests pass.

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• All relevant type-of-change labels have been added.
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All new and existing tests pass.
• Bump major, minor, patch, pre-release, and/or build versions as appropriate via the bump_version script if this repository is versioned and the changes in this PR warrant a version bump.
• Create a pre-release (necessary if and only if the pre-release version was bumped).

✅ Pre-merge checklist

• Finalize version.

✅ Post-merge checklist

• Create a release (necessary if and only if the version was bumped).

[jsf9k]

@mcdonnnj - I'm not sure what kind of version bump to apply here, if any.

[jsf9k]

The flake8 config could be moved to the pyproject.toml file as well, but that would require the pyproject-flake8 Python package.

The bandit config is only used when pre-commit runs bandit against the Python test code; otherwise, we use the default configuration for bandit.

[jsf9k]

This URL was specified in setup.py, but I didn't have a particular place to put it in pyproject.toml. I'm open to changing Mission to something else or removing this URL altogether.

[dav3r]

I'm on board with what you have here.

[jsf9k]

I realize that we want wheel and pip to be the latest versions, but should we now remove setuptools from setup-env? If so then this would be an upstream change in cisagov/skeleton-generic.

[dav3r]

This all looks like a solid start to me. Thanks for getting us switched over to pyproject.toml. 🎉

[Copilot]

Pull Request Overview

This pull request migrates the project from a setup.py-based build configuration to a modern pyproject.toml-based configuration using the Hatchling build backend. This modernization consolidates configuration files and follows current Python packaging best practices (PEP 517/518).

• Migrates from setup.py to pyproject.toml with Hatchling as the build backend
• Consolidates pytest.ini and .isort.cfg configurations into pyproject.toml
• Updates GitHub labeler configuration to reference the new configuration file

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
setup.py	Removed legacy setup.py file (116 lines)
pytest.ini	Removed standalone pytest configuration file
.isort.cfg	Removed standalone isort configuration file
pyproject.toml	Added comprehensive project configuration including build system, dependencies, tool configurations, and metadata
.github/labeler.yml	Updated file references from setup.py, .isort.cfg, and pytest.ini to pyproject.toml

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