Drop Python 2 support and require Python 3.7+

- Updated `requires-python` to `>=3.7, <4`
- Removed Python 2.x classifiers and setuptools fallback
- Switched build backend to `hatchling.build`
- Added Python 3.13 classifier
- Updated release notes and migration guide to reflect change
- Removed unused `build_backend.py` and `setup.py` from sdist

Author: buddly27

build_backend.py

@@ -6,3 +6,10 @@ Migration notes
 
 This section will show more detailed information when relevant for switching to
 a new version, such as when upgrading involves backwards incompatibilities.
+
+.. _release/migration/1.0.0:
+
+Migrate to 1.0.0
+================
+
+Dropped support for Python 2.x. The minimum supported version is now Python 3.7.

doc/release/migration_notes.rst

@@ -6,6 +6,11 @@ Release Notes
 
 .. release:: Upcoming
 
+    .. change:: changed
+
+        Dropped support for Python 2.x. The minimum supported version is now
+        Python 3.7.
+
     .. change:: new
 
         Added compatibility with CMake 4.1.

doc/release/release_notes.rst

@@ -1,18 +1,16 @@
 [build-system]
 requires = [
-    "hatchling >= 1.4; python_version >= '3'",
-    "setuptools >= 44; python_version < '3'",
+    "hatchling >= 1.4",
     "cmake >= 3.20, < 4.2"
 ]
-build-backend = "build_backend"
-backend-path = ["."]
+build-backend = "hatchling.build"
 
 [project]
 name = "pytest-cmake"
 version = "0.13.0"
 description = "Provide CMake module for Pytest"
 readme = "README.md"
-requires-python = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*, <4"
+requires-python = ">=3.7, <4"
 license = {file = "LICENSE"}
 keywords = ["cmake", "pytest", "development"]
 authors = [
@@ -25,15 +23,14 @@ classifiers = [
     "Intended Audience :: Developers",
     "Topic :: Software Development :: Build Tools",
     "License :: OSI Approved :: MIT License",
-    "Programming Language :: Python :: 2",
-    "Programming Language :: Python :: 2.7",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "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",
 ]
 
 [project.urls]
@@ -56,4 +53,4 @@ path = "build_config.py"
 only-include = ["*.cmake"]
 
 [tool.hatch.build.targets.sdist]
-only-include = ["cmake", "build_config.py", "build_backend.py", "setup.py"]
+only-include = ["cmake", "build_config.py"]