build: drop support for EOL py37 (#743)

* build: drop support for EOL py37

* Test on PyPy 3.10

Co-authored-by: Henry Schreiner <[email protected]>

* Add changelog entry

---------

Co-authored-by: Henry Schreiner <[email protected]>

.github/workflows/reusable-pytest.yml

@@ -15,15 +15,14 @@ jobs:
           - macos
           - windows
         py:
-          - "pypy-3.7"
           - "pypy-3.8"
           - "pypy-3.9"
+          - "pypy-3.10"
           - "3.12"
           - "3.11"
           - "3.10"
           - "3.9"
           - "3.8"
-          - "3.7"
         tox-target:
           - "tox"
           - "min"
@@ -32,7 +31,7 @@ jobs:
       ${{
         (
           startsWith(matrix.py, 'pypy-')
-          && (!endsWith(matrix.py, '-3.7') || matrix.os == 'windows')
+          && matrix.os == 'windows'
         )
         && true
         || false

CHANGELOG.rst

@@ -3,6 +3,12 @@ Changelog
 +++++++++
 
 
+Unreleased
+==========
+
+- Dropped support for Python 3.7 (PR :pr:`743`)
+
+
 1.1.1 (2024-02-29)
 ==================
 

docs/installation.rst

@@ -41,11 +41,11 @@ Compatibility
 ``build`` is verified to be compatible with the following Python
 versions:
 
-- 3.7
 - 3.8
 - 3.9
 - 3.10
 - 3.11
+- 3.12
 - PyPy3
 
 

pyproject.toml

@@ -7,7 +7,7 @@ name = "build"
 version = "1.1.1"
 description = "A simple, correct Python build frontend"
 readme = "README.md"
-requires-python = ">= 3.7"
+requires-python = ">= 3.8"
 license.file = "LICENSE"
 authors = [
   { name = "Filipe Laíns", email = "[email protected]" },
@@ -19,7 +19,6 @@ classifiers = [
   "License :: OSI Approved :: MIT License",
   "Programming Language :: Python :: 3",
   "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",
@@ -128,7 +127,7 @@ filterwarnings = [
 
 [tool.mypy]
 files = "src"
-python_version = "3.7"
+python_version = "3.8"
 strict = true
 show_error_codes = true
 enable_error_code = ["ignore-without-code", "truthy-bool", "redundant-expr"]

src/build/__init__.py

@@ -366,10 +366,7 @@ def log(message: str) -> None:
 
         :param message: Message to output
         """
-        if sys.version_info >= (3, 8):
-            _logger.log(logging.INFO, message, stacklevel=2)
-        else:
-            _logger.log(logging.INFO, message)
+        _logger.log(logging.INFO, message, stacklevel=2)
 
 
 __all__ = [

src/build/_compat/importlib.py

@@ -1,18 +1,20 @@
 from __future__ import annotations
 
 import sys
+import typing
 
 
-if sys.version_info < (3, 8):
+if typing.TYPE_CHECKING:
     import importlib_metadata as metadata
-elif sys.version_info >= (3, 10, 2):
-    from importlib import metadata
 else:
-    try:
-        import importlib_metadata as metadata
-    except ModuleNotFoundError:
-        # helps bootstrapping when dependencies aren't installed
+    if sys.version_info >= (3, 10, 2):
         from importlib import metadata
+    else:
+        try:
+            import importlib_metadata as metadata
+        except ModuleNotFoundError:
+            # helps bootstrapping when dependencies aren't installed
+            from importlib import metadata
 
 
 __all__ = [

src/build/env.py

@@ -20,18 +20,10 @@
 from ._util import check_dependency
 
 
-if sys.version_info >= (3, 8):
-    from typing import Protocol
-elif typing.TYPE_CHECKING:
-    from typing_extensions import Protocol
-else:
-    Protocol = abc.ABC
-
-
 _logger = logging.getLogger(__name__)
 
 
-class IsolatedEnv(Protocol):
+class IsolatedEnv(typing.Protocol):
     """Isolated build environment ABC."""
 
     @property
@@ -207,10 +199,7 @@ def log(message: str) -> None:
 
         :param msg: Message to output
         """
-        if sys.version_info >= (3, 8):
-            _logger.log(logging.INFO, message, stacklevel=2)
-        else:
-            _logger.log(logging.INFO, message)
+        _logger.log(logging.INFO, message, stacklevel=2)
 
 
 def _create_isolated_env_virtualenv(path: str) -> tuple[str, str]:

tests/conftest.py

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: MIT
 
 import contextlib
+import importlib.metadata
 import os
 import os.path
 import shutil
@@ -14,12 +15,6 @@
 import build.env
 
 
-if sys.version_info < (3, 8):
-    import importlib_metadata as metadata
-else:
-    from importlib import metadata
-
-
 def pytest_addoption(parser):
     os.environ['PYTHONWARNINGS'] = 'ignore:DEPRECATION::pip._internal.cli.base_command'  # for when not run within tox
     os.environ['PIP_DISABLE_PIP_VERSION_CHECK'] = '1'  # do not pollute stderr with upgrade advisory
@@ -141,6 +136,6 @@ def pytest_report_header() -> str:
     for package in interesting_packages:
         # Old versions of importlib_metadata made this FileNotFoundError
         with contextlib.suppress(ModuleNotFoundError, FileNotFoundError):
-            valid.append(f'{package}=={metadata.version(package)}')
+            valid.append(f'{package}=={importlib.metadata.version(package)}')
     reqs = ' '.join(valid)
     return f'installed packages of interest: {reqs}'

tests/test_module.py

@@ -1,16 +1,11 @@
 # SPDX-License-Identifier: MIT
 
-import sys
-
-import pytest
-
 import build
 
 
 def test_version():
     assert build.__version__
 
 
-@pytest.mark.skipif(sys.version_info < (3, 7), reason='Python 3.7+ required for dir support')
 def test_dir():
     assert set(dir(build)) == set(build.__all__)

tox.ini

@@ -7,7 +7,7 @@ env_list =
     type
     docs
     path
-    {py312, py311, py310, py39, py38, py37, pypy39, pypy38, pypy37}{, -min}
+    {py312, py311, py310, py39, py38, pypy310, pypy39, pypy38}{, -min}
 skip_missing_interpreters = true
 
 [testenv]
@@ -69,7 +69,7 @@ set_env =
 commands_pre =
     python -E -m pip uninstall -y build colorama
 
-[testenv:{py312, py311, py310, py39, py38, py37, pypy37, pypy38, pypy39}-min]
+[testenv:{py312, py311, py310, py39, py38, pypy38, pypy39, pypy310}-min]
 description = check minimum versions required of all dependencies
 skip_install = true
 commands_pre =
@@ -105,7 +105,7 @@ commands =
     python -m diff_cover.diff_cover_tool --compare-branch {env:DIFF_AGAINST:origin/main} {toxworkdir}/coverage.xml
 depends =
     path
-    {py312, py311, py310, py39, py38, py37, pypy39, pypy38, pypy37}{, -min}
+    {py312, py311, py310, py39, py38, pypy310, pypy39, pypy38}{, -min}
 
 [testenv:bump]
 description = bump versions, pass major/minor/patch