Replace setuptools build backend with hatchling [rebased]

.bumpversion.cfg

@@ -3,9 +3,9 @@ current_version = 6.3.0
 commit = True
 tag = True
 
-[bumpversion:file:setup.py]
-search = version='{current_version}'
-replace = version='{new_version}'
+[bumpversion:file:pyproject.toml]
+search = version = "{current_version}"
+replace = version = "{new_version}"
 
 [bumpversion:file (badge):README.rst]
 search = /v{current_version}.svg

.pre-commit-config.yaml

@@ -6,15 +6,21 @@ exclude: '^(\.tox|ci/templates|\.bumpversion\.cfg)(/|$)'
 # Note the order is intentional to avoid multiple passes of the hooks
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.11.13
+    rev: v0.12.12
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix, --show-fixes, --unsafe-fixes]
       - id: ruff-format
+  - repo: https://github.com/ComPWA/taplo-pre-commit
+    rev: v0.9.3
+    hooks:
+      - id: taplo-format
+      - id: taplo-lint
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
       - id: trailing-whitespace
       - id: end-of-file-fixer
-        exclude: '.*\.pth$'
+      - id: mixed-line-ending
+        args: [--fix=lf]
       - id: debug-statements

.taplo.toml

@@ -0,0 +1,3 @@
+[formatting]
+array_auto_collapse = false
+indent_string = "    "

AUTHORS.rst

@@ -64,3 +64,4 @@ Authors
 * Dawn James - https://github.com/dawngerpony
 * Tsvika Shapira - https://github.com/tsvikas
 * Marcos Boger - https://github.com/marcosboger
+* Ofek Lev - https://github.com/ofek

CHANGELOG.rst

@@ -20,6 +20,11 @@ Changelog
     patch = subprocess
 
   This release also requires at least coverage 7.10.6.
+* Switched packaging to have metadata completely in ``pyproject.toml`` and use `hatchling <https://pypi.org/project/hatchling/>`_ for
+  building.
+  Contributed by Ofek Lev in `#551 <https://github.com/pytest-dev/pytest-cov/pull/551>`_
+  with some extras in `#716 <https://github.com/pytest-dev/pytest-cov/pull/716>`_.
+* Removed some not really necessary testing deps like ``six``.
 
 6.3.0 (2025-09-06)
 ------------------
@@ -277,8 +282,8 @@ Changelog
 ------------------
 
 * Fixed ``RecursionError`` that can occur when using
-  `cleanup_on_signal <https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html#if-you-got-custom-signal-handling>`__ or
-  `cleanup_on_sigterm <https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html#if-you-got-custom-signal-handling>`__.
+  `cleanup_on_signal <https://pytest-cov.readthedocs.io/en/v2.8.0/subprocess-support.html#if-you-got-custom-signal-handling>`__ or
+  `cleanup_on_sigterm <https://pytest-cov.readthedocs.io/en/v2.8.0/subprocess-support.html#if-you-got-custom-signal-handling>`__.
   See: `#294 <https://github.com/pytest-dev/pytest-cov/issues/294>`_.
   The 2.7.x releases of pytest-cov should be considered broken regarding aforementioned cleanup API.
 * Added compatibility with future xdist release that deprecates some internals

ci/bootstrap.py

@@ -20,8 +20,6 @@ def exec_in_env():
     else:
         bin_path = env_path / 'bin'
     if not env_path.exists():
-        import subprocess
-
         print(f'Making bootstrap env in: {env_path} ...')
         try:
             check_call([sys.executable, '-m', 'venv', env_path])
@@ -59,7 +57,7 @@ def main():
         # This uses sys.executable the same way that the call in
         # cookiecutter-pylibrary/hooks/post_gen_project.py
         # invokes this bootstrap.py itself.
-        for line in subprocess.check_output([sys.executable, '-m', 'tox', '--listenvs'], text=True).splitlines()
+        for line in subprocess.check_output([sys.executable, '-m', 'tox', '--listenvs'], universal_newlines=True).splitlines()
     ]
     tox_environments = [line for line in tox_environments if line.startswith('py')]
     for template in templates_path.rglob('*'):

ci/requirements.txt

@@ -1,5 +1,4 @@
-virtualenv>=16.6.0
-pip>=19.1.1
-setuptools>=18.0.1
-tox
-twine
+pip>=25
+setuptools>=80
+tox>=4
+virtualenv>=20.34

docs/releasing.rst

@@ -23,7 +23,7 @@ The process for releasing should follow these steps:
    These files need to be removed to force distutils/setuptools to rebuild everything and recreate the egg-info metadata.
 #. Build the dists::
 
-        python3 setup.py clean --all sdist bdist_wheel
+        python -m build
 
 #. Verify that the resulting archives (found in ``dist/``) are good.
 #. Upload the sdist and wheel with twine::

pyproject.toml

@@ -1,6 +1,76 @@
 [build-system]
-requires = [
-    "setuptools>=30.3.0",
+requires = ["hatchling", "hatch-fancy-pypi-readme"]
+build-backend = "hatchling.build"
+
+[project]
+name = "pytest-cov"
+dynamic = ["readme"]
+version = "6.3.0"
+description = "Pytest plugin for measuring coverage."
+license = "MIT"
+requires-python = ">=3.9"
+authors = [
+    { name = "Marc Schlaich", email = "[email protected]" },
+]
+maintainers = [
+    { name = "Ionel Cristian Mărieș", email = "[email protected]" },
+]
+keywords = [
+    "cover",
+    "coverage",
+    "distributed",
+    "parallel",
+    "py.test",
+    "pytest",
+]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Framework :: Pytest",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: Microsoft :: Windows",
+    "Operating System :: POSIX",
+    "Operating System :: Unix",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+    "Topic :: Software Development :: Testing",
+    "Topic :: Utilities",
+]
+dependencies = [
+    "coverage[toml]>=7.10.6",
+    "pytest>=7",
+    "pluggy>=1.2",
+]
+
+[project.optional-dependencies]
+testing = [
+    "process-tests",
+    "pytest-xdist",
+    "virtualenv",
+]
+
+[project.entry-points.pytest11]
+pytest_cov = "pytest_cov.plugin"
+
+[project.urls]
+"Sources" = "https://github.com/pytest-dev/pytest-cov"
+"Documentation" = "https://pytest-cov.readthedocs.io/"
+"Changelog" = "https://pytest-cov.readthedocs.io/en/latest/changelog.html"
+"Issue Tracker" = "https://github.com/pytest-dev/pytest-cov/issues"
+
+[tool.hatch.metadata.hooks.fancy-pypi-readme]
+content-type = "text/x-rst"
+fragments = [
+    { path = "README.rst" },
+    { path = "CHANGELOG.rst" },
 ]
 
 [tool.ruff]
@@ -14,30 +84,31 @@ target-version = "py39"
 
 [tool.ruff.lint]
 ignore = [
-    "RUF001", # ruff-specific rules ambiguous-unicode-character-string
-    "S101", # flake8-bandit assert
-    "S308", # flake8-bandit suspicious-mark-safe-usage
-    "E501", # pycodestyle line-too-long
+    "PLC0415", # `import` should be at the top-level of a file
+    "RUF001",  # ruff-specific rules ambiguous-unicode-character-string
+    "S101",    # flake8-bandit assert
+    "S308",    # flake8-bandit suspicious-mark-safe-usage
+    "E501",    # pycodestyle line-too-long
 ]
 select = [
-    "B", # flake8-bugbear
-    "C4", # flake8-comprehensions
+    "B",   # flake8-bugbear
+    "C4",  # flake8-comprehensions
     "DTZ", # flake8-datetimez
-    "E", # pycodestyle errors
+    "E",   # pycodestyle errors
     "EXE", # flake8-executable
-    "F", # pyflakes
-    "I", # isort
+    "F",   # pyflakes
+    "I",   # isort
     "INT", # flake8-gettext
     "PIE", # flake8-pie
     "PLC", # pylint convention
     "PLE", # pylint errors
-    "PT", # flake8-pytest-style
+    "PT",  # flake8-pytest-style
     "PTH", # flake8-use-pathlib
     "RSE", # flake8-raise
     "RUF", # ruff-specific rules
-    "S", # flake8-bandit
-    "UP", # pyupgrade
-    "W", # pycodestyle warnings
+    "S",   # flake8-bandit
+    "UP",  # pyupgrade
+    "W",   # pycodestyle warnings
 ]
 
 [tool.ruff.lint.flake8-pytest-style]