feat: drop python<=3.7 support (#769)

Author: kloczek

.github/CONTRIBUTING.md

@@ -241,7 +241,7 @@ build-backend = "scikit_build_core.build"
 [project]
 name = "cmake_example"
 version = "0.0.1"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 
 [project.optional-dependencies]
 test = ["pytest>=6.0"]
@@ -275,7 +275,7 @@ setup(
     cmake_source_dir=".",
     zip_safe=False,
     extras_require={"test": ["pytest>=6.0"]},
-    python_requires=">=3.7",
+    python_requires=">=3.8",
 )
 ```
 

.github/workflows/ci.yml

@@ -52,23 +52,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "pypy-3.9", "3.12", "3.13"]
+        python-version: ["3.8", "pypy-3.9", "3.13"]
         runs-on: [ubuntu-latest, macos-13]
         cmake-version: ["3.15.x"]
 
         include:
-          - python-version: "3.7"
-            runs-on: windows-2022
-            cmake-version: "3.21.x"
           - python-version: "pypy-3.8"
             runs-on: windows-2022
             cmake-version: "3.21.x"
           - python-version: "3.11"
             runs-on: windows-2022
             cmake-version: "3.26.x"
-          - python-version: "pypy-3.7"
-            runs-on: ubuntu-latest
-            cmake-version: "3.15.x"
           - python-version: "pypy-3.10"
             runs-on: ubuntu-latest
             cmake-version: "3.15.x"
@@ -99,13 +93,9 @@ jobs:
           - python-version: "3.13"
             runs-on: windows-latest
             cmake-version: "3.26.x"
-          - python-version: "3.7"
+          - python-version: "3.8"
             runs-on: ubuntu-22.04
             cmake-version: "3.15.x"
-        exclude:
-          - python-version: "3.7"
-            runs-on: ubuntu-latest
-            cmake-version: "3.15.x"
 
     steps:
       - uses: actions/checkout@v4
@@ -118,23 +108,17 @@ jobs:
           allow-prereleases: true
 
       - uses: astral-sh/setup-uv@v5
-        if:
-          matrix.python-version != '3.7' && matrix.python-version != 'pypy-3.8'
-          && matrix.python-version != 'pypy-3.7'
+        if: matrix.python-version != 'pypy-3.8'
 
       - name: Install package (uv)
-        if:
-          matrix.python-version != '3.7' && matrix.python-version != 'pypy-3.8'
-          && matrix.python-version != 'pypy-3.7'
+        if: matrix.python-version != 'pypy-3.8'
         run:
           uv pip install
           -e.[test,test-meta,test-numpy,test-schema,test-hatchling,wheels,cov,wheel-free-setuptools]
           --system
 
       - name: Install package (pip)
-        if:
-          matrix.python-version == '3.7' || matrix.python-version == 'pypy-3.8'
-          || matrix.python-version == 'pypy-3.7'
+        if: matrix.python-version == 'pypy-3.8'
         run:
           pip install
           -e.[test,test-meta,test-numpy,test-schema,wheels,cov,wheel-free-setuptools]

.pre-commit-config.yaml

@@ -76,9 +76,8 @@ repos:
           - cmake
           - exceptiongroup
           - hatch-fancy-pypi-readme>=24
-          - importlib-metadata>=6.6.0
           - importlib-resources
-          - markdown-it-py<3 # Python 3.7 compat needed for mypy check
+          - markdown-it-py
           - ninja
           - nox
           - orjson

README.md

@@ -70,7 +70,7 @@ features over classic Scikit-build:
 The following limitations are present compared to classic scikit-build:
 
 - The minimum supported CMake is 3.15
-- The minimum supported Python is 3.7
+- The minimum supported Python is 3.8 (3.7+ for 0.10.x and older)
 
 Some known missing features that will be developed soon:
 
@@ -218,7 +218,7 @@ sdist.cmake = false
 wheel.packages = ["src/<package>", "python/<package>", "<package>"]
 
 # The Python tags. The default (empty string) will use the default Python
-# version. You can also set this to "cp37" to enable the CPython 3.7+ Stable ABI
+# version. You can also set this to "cp38" to enable the CPython 3.8+ Stable ABI
 # / Limited API (only on CPython and if the version is sufficient, otherwise
 # this has no effect). Or you can set it to "py3" or "py2.py3" to ignore Python
 # ABI compatibility. The ABI tag is inferred from this tag.

docs/cmakelists.md

@@ -123,7 +123,7 @@ in your `pyproject.toml`:
 
 ```toml
 [tool.scikit-build]
-wheel.py-api = "cp37"
+wheel.py-api = "cp38"
 ```
 
 When you do that, `${SKBUILD_SABI_COMPONENT}` will be set to

docs/conf.py

@@ -7,17 +7,13 @@
 from __future__ import annotations
 
 import importlib
+import importlib.metadata
 import inspect
 import os
 import sys
 import warnings
 from pathlib import Path
 
-if sys.version_info < (3, 8):
-    import importlib_metadata
-else:
-    import importlib.metadata as importlib_metadata
-
 try:
     import scikit_build_core
 except ModuleNotFoundError:
@@ -32,7 +28,7 @@
     from scikit_build_core import __version__ as version
 except ModuleNotFoundError:
     try:
-        version = importlib_metadata.version("scikit_build_core")
+        version = importlib.metadata.version("scikit_build_core")
     except ModuleNotFoundError:
         msg = (
             "Package should be installed to produce documentation! "

docs/configuration.md

@@ -352,7 +352,7 @@ the wheel tags for the version you support:
 
 ```toml
 [tool.scikit-build]
-wheel.py-api = "cp37"
+wheel.py-api = "cp38"
 ```
 
 Scikit-build-core will only target ABI3 if the version of Python is equal to or
@@ -698,8 +698,8 @@ configuration. Recommendations:
 Known limitations:
 
 - Resources (via `importlib.resources`) are not properly supported (yet).
-  Currently experimentally supported except on Python 3.9 (3.7, 3.8, 3.10, 3.11,
-  and 3.12 work). `importlib_resources` may work on Python 3.9.
+  Currently experimentally supported except on Python 3.9 (3.8, 3.10, 3.11,
+  3.12, and 3.13 work). `importlib_resources` may work on Python 3.9.
 
 ```console
 # Very experimental rebuild on initial import feature

docs/examples/downstream/pybind11_example/README.md

@@ -8,7 +8,7 @@
 | pip builds   | [![Pip Actions Status][actions-pip-badge]][actions-pip-link]       |
 
 An example project built with [pybind11](https://github.com/pybind/pybind11) and
-scikit-build-core. Python 3.7+ (see older commits for older versions of Python).
+scikit-build-core. Python 3.8+ (see older commits for older versions of Python).
 
 [gitter-badge]: https://badges.gitter.im/pybind/Lobby.svg
 [gitter-link]: https://gitter.im/pybind/Lobby

docs/examples/downstream/pybind11_example/pyproject.toml

@@ -11,16 +11,17 @@ readme = "README.md"
 authors = [
   { name = "My Name", email = "me@email.com" },
 ]
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 classifiers = [
   "Development Status :: 4 - Beta",
   "License :: OSI Approved :: MIT License",
   "Programming Language :: Python :: 3 :: Only",
-  "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.optional-dependencies]

docs/examples/getting_started/abi3/CMakeLists.txt

@@ -6,6 +6,6 @@ find_package(
   COMPONENTS Interpreter Development.SABIModule
   REQUIRED)
 
-python_add_library(example MODULE example.c WITH_SOABI USE_SABI 3.7)
+python_add_library(example MODULE example.c WITH_SOABI USE_SABI 3.8)
 
 install(TARGETS example DESTINATION .)