Migrate project metadata to pyproject.toml

- Migrate all project metadata from setup.cfg to pyproject.toml
- Convert dev dependencies to PEP 735 dependency-groups
- Remove dev extra from optional-dependencies
- Update all requirements files to remove dev extra
- Update tox.ini to remove dev extra and specify deps explicitly
- Simplify setup.cfg to only contain bumpversion and flake8 configs
- Fix entry point syntax (remove invalid [cli] extra notation)
- Migrate pytest configuration to pyproject.toml

This modernizes the project structure following current Python packaging
best practices (PEP 621, PEP 735).

Author: claude

changelog.d/+pyproject_migration.misc.rst

@@ -0,0 +1 @@
+Migrate project metadata to pyproject.toml and convert dev dependencies to PEP 735 dependency group

pyproject.toml

@@ -2,10 +2,82 @@
 requires = ["setuptools>80", "wheel", "setuptools_scm[toml]>9"]
 build-backend = "setuptools.build_meta"
 
+[project]
+name = "prance"
+description = "Resolving Swagger/OpenAPI 2.0 and 3.0.0 Parser"
+readme = {file = "README.rst", content-type = "text/x-rst"}
+requires-python = ">=3.10"
+license = {text = "MITNFA"}
+authors = [
+    {name = "Jens Finkhaeuser", email = "jens@finkhaeuser.de"}
+]
+maintainers = [
+    {name = "Ronny Pfannschmidt", email = "opensource@ronnypfannschmidt.de"}
+]
+keywords = ["swagger", "openapi", "parsing"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Plugins",
+    "Intended Audience :: Developers",
+    "Natural Language :: English",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
+    "Topic :: Internet :: WWW/HTTP",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+dependencies = [
+    "chardet>=5.2",
+    "ruamel.yaml>=0.18.16",
+    "requests>=2.32.5",
+    "packaging>=25.0",
+]
+dynamic = ["version"]
+
+[project.urls]
+Homepage = "https://github.com/RonnyPfannschmidt/prance"
+
+[project.optional-dependencies]
+icu = ["PyICU~=2.14"]
+ssv = ["swagger-spec-validator~=3.0.4"]
+osv = ["openapi-spec-validator~=0.7.1"]
+flex = ["flex~=6.14.1"]
+cli = ["click>=8.3.0"]
+
+[project.scripts]
+prance = "prance.cli:cli"
+
+[dependency-groups]
+dev = [
+    "tox>=4.32.0",
+    "bumpversion>=0.6.0",
+    "pytest>=9.0.1",
+    "pytest-cov>=7.0.0",
+    "sphinx>=8.1.3,<8.2",
+    "towncrier>=25.8.0",
+]
+
+[tool.setuptools]
+zip-safe = true
+include-package-data = true
+
+[tool.setuptools.packages.find]
+exclude = ["ez_setup", "examples", "tests"]
 
 [tool.setuptools_scm]
 write_to = "prance/_version.py"
 
+[tool.pytest.ini_options]
+addopts = "--verbose --cov=prance --cov-report=term-missing --cov-fail-under=89"
+testpaths = ["tests"]
+markers = [
+    "requires_network: Marks test as requiring network connections (deselect with '-m \"not requires_network\"')",
+]
+
 [tool.towncrier]
 package = "prance"
 package_dir = "."

requirements.txt

@@ -1 +1 @@
--e .[dev,ssv,osv,icu,cli]
+-e .[ssv,osv,icu,cli]

requirements_bare.txt

@@ -1 +1 @@
--e .[dev]
+-e .

requirements_flex.txt

@@ -1 +1 @@
--e .[dev,flex,icu]
+-e .[flex,icu]

requirements_no_icu.txt

@@ -1 +1 @@
--e .[dev,ssv,osv,cli]
+-e .[ssv,osv,cli]

requirements_no_osv_or_icu.txt

@@ -1 +1 @@
--e .[dev,ssv,cli]
+-e .[ssv,cli]

setup.cfg

@@ -1,80 +1,8 @@
-[metadata]
-name = prance
-description = Resolving Swagger/OpenAPI 2.0 and 3.0.0 Parser
-long_description = file: README.rst
-long_description_content_type = text/x-rst
-classifiers =
-    Development Status :: 4 - Beta
-    Environment :: Plugins
-    Intended Audience :: Developers
-    Natural Language :: English
-    Operating System :: OS Independent
-    Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.10
-    Programming Language :: Python :: 3.11
-    Programming Language :: Python :: 3.12
-    Programming Language :: Python :: 3.13
-    Programming Language :: Python :: 3.14
-    Topic :: Internet :: WWW/HTTP
-    Topic :: Software Development :: Libraries :: Python Modules
-keywords = swagger openapi parsing
-author = Jens Finkhaeuser
-author_email = jens@finkhaeuser.de
-maintainer = Ronny Pfannschmidt
-maintainer_email = opensource@ronnypfannschmidt.de
-url = https://github.com/RonnyPfannschmidt/prance
-license = MITNFA
-
-[options]
-packages = find:
-include_package_data = True
-install_requires =
-    chardet>=5.2
-    ruamel.yaml>=0.18.16
-    requests>=2.32.5
-    packaging>=25.0
-zip_safe = True
-python_requires = >=3.10
-
-[options.packages.find]
-exclude =
-    ez_setup
-    examples
-    tests
-
-[options.entry_points]
-console_scripts =
-    prance=prance.cli:cli [cli]
-
-[options.extras_require]
-dev =
-    tox>=4.32.0
-    bumpversion>=0.6.0
-    pytest>=9.0.1
-    pytest-cov>=7.0.0
-    sphinx>=8.1.3,<8.2
-    towncrier>=25.8.0
-icu = PyICU~=2.14
-ssv = swagger-spec-validator~=3.0.4
-osv = openapi-spec-validator~=0.7.1
-flex = flex~=6.14.1
-cli = click>=8.3.0
-
 [bumpversion]
 current_version = 0.20.2
 commit = True
 tag = True
 
-[aliases]
-test = pytest
-
-[tool:pytest]
-addopts = --verbose --cov=prance --cov-report=term-missing --cov-fail-under=89
-testpaths = tests
-markers =
-    requires_network: Marks test as requiring network connections (deselect with '-m "not requires_network"')
-
-
 [flake8]
 inline_quotes = double
 exclude =

tox.ini

@@ -6,14 +6,13 @@ isolated_build=true
 [testenv]
 # Different dependencies for different test environments
 extras =
-  default: dev,ssv,osv,icu,cli
-  no_icu: dev,ssv,osv,cli
-  no_osv_or_icu: dev,ssv,cli
-  flex: dev,flex,icu
-  bare: dev
+  default: ssv,osv,icu,cli
+  no_icu: ssv,osv,cli
+  no_osv_or_icu: ssv,cli
+  flex: flex,icu
 deps =
-  pytest
-  pytest-cov
+  pytest>=9.0.1
+  pytest-cov>=7.0.0
 # We need to set environment variables for py3 to work with click
 setenv =
   LC_ALL=C.UTF-8
@@ -22,7 +21,8 @@ setenv =
 commands =
   pytest {posargs}
 [testenv:docs]
-extras=dev
+deps =
+  sphinx>=8.1.3,<8.2
 commands =
   sphinx-build -b html \
     -d docs/build/doctrees \