Drop Python 3.5

README.md

@@ -24,7 +24,6 @@ What does it do?
 
 |   | macOS Intel | macOS Apple Silicon | Windows 64bit | Windows 32bit | manylinux x86_64 | manylinux i686 | manylinux aarch64 | manylinux ppc64le | manylinux s390x |
 |---|---|---|---|---|---|---|---|---|---|
-| CPython 3.5     | ✅ |   | ✅  | ✅  | ✅ | ✅ | ✅ | ✅ | ✅ |
 | CPython 3.6     | ✅ |   | ✅  | ✅  | ✅ | ✅ | ✅ | ✅ | ✅ |
 | CPython 3.7     | ✅ |   | ✅  | ✅  | ✅ | ✅ | ✅ | ✅ | ✅ |
 | CPython 3.8     | ✅ |   | ✅  | ✅  | ✅ | ✅ | ✅ | ✅ | ✅ |

bin/update_dependencies.py

@@ -17,7 +17,7 @@
 # regenerate the constraints files
 os.environ["CUSTOM_COMPILE_COMMAND"] = "bin/update_dependencies.py"
 
-PYTHON_VERSIONS = ["35", "36", "37", "38", "39"]
+PYTHON_VERSIONS = ["36", "37", "38", "39"]
 
 if "--no-docker" in sys.argv:
     for python_version in PYTHON_VERSIONS:

cibuildwheel/macos.py

@@ -111,21 +111,6 @@ def get_python_configurations(
                 c for c in python_configurations if not c.identifier.startswith("pp")
             ]
 
-        if any(c.identifier.startswith("cp35") for c in python_configurations):
-            # CPython 3.5 doesn't work on macOS 11
-            log.warning(
-                unwrap(
-                    """
-                    CPython 3.5 is unsupported when building on macOS 11. To build CPython 3.5
-                    wheels, build on an older OS, such as macOS 10.15. To silence this warning,
-                    deselect CPython 3.5 by adding "cp35-macosx_x86_64" to your CIBW_SKIP option.
-                    """
-                )
-            )
-            python_configurations = [
-                c for c in python_configurations if not c.identifier.startswith("cp35")
-            ]
-
     return python_configurations
 
 
@@ -164,21 +149,6 @@ def install_cpython(version: str, url: str) -> Path:
         download(url, Path("/tmp/Python.pkg"))
         # install
         call(["sudo", "installer", "-pkg", "/tmp/Python.pkg", "-target", "/"])
-        # patch open ssl
-        if version == "3.5":
-            open_ssl_patch_url = f"https://github.com/mayeut/patch-macos-python-openssl/releases/download/v1.1.1h/patch-macos-python-{version}-openssl-v1.1.1h.tar.gz"
-            download(open_ssl_patch_url, Path("/tmp/python-patch.tar.gz"))
-            call(
-                [
-                    "sudo",
-                    "tar",
-                    "-C",
-                    f"/Library/Frameworks/Python.framework/Versions/{version}/",
-                    "-xmf",
-                    "/tmp/python-patch.tar.gz",
-                ]
-            )
-
         call(["sudo", str(installation_bin_path / python_executable), str(install_certifi_script)])
 
     pip_executable = "pip3"
@@ -278,20 +248,12 @@ def setup_python(
         sys.exit(1)
 
     # Set MACOSX_DEPLOYMENT_TARGET to 10.9, if the user didn't set it.
-    # CPython 3.5 defaults to 10.6, and pypy defaults to 10.7, causing
-    # inconsistencies if it's left unset.
+    # PyPy defaults to 10.7, causing inconsistencies if it's left unset.
     env.setdefault("MACOSX_DEPLOYMENT_TARGET", "10.9")
 
     config_is_arm64 = python_configuration.identifier.endswith("arm64")
     config_is_universal2 = python_configuration.identifier.endswith("universal2")
 
-    if python_configuration.version == "3.5":
-        # Cross-compilation platform override - CPython 3.5 has an
-        # i386/x86_64 version of Python, but we only want a x64_64 build
-        env.setdefault("_PYTHON_HOST_PLATFORM", "macosx-10.9-x86_64")
-        # https://github.com/python/cpython/blob/a5ed2fe0eedefa1649aa93ee74a0bafc8e628a10/Lib/_osx_support.py#L260
-        env.setdefault("ARCHFLAGS", "-arch x86_64")
-
     if python_configuration.version == "3.9":
         if python_configuration.identifier.endswith("x86_64"):
             # even on the macos11.0 Python installer, on the x86_64 side it's

cibuildwheel/resources/build-platforms.toml

@@ -1,28 +1,23 @@
 [linux]
 python_configurations = [
-  { identifier = "cp35-manylinux_x86_64", version = "3.5", path_str = "/opt/python/cp35-cp35m" },
   { identifier = "cp36-manylinux_x86_64", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-manylinux_x86_64", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-manylinux_x86_64", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_x86_64", version = "3.9", path_str = "/opt/python/cp39-cp39" },
-  { identifier = "cp35-manylinux_i686", version = "3.5", path_str = "/opt/python/cp35-cp35m" },
   { identifier = "cp36-manylinux_i686", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-manylinux_i686", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-manylinux_i686", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_i686", version = "3.9", path_str = "/opt/python/cp39-cp39" },
   { identifier = "pp36-manylinux_x86_64", version = "3.6", path_str = "/opt/python/pp36-pypy36_pp73" },
   { identifier = "pp37-manylinux_x86_64", version = "3.7", path_str = "/opt/python/pp37-pypy37_pp73" },
-  { identifier = "cp35-manylinux_aarch64", version = "3.5", path_str = "/opt/python/cp35-cp35m" },
   { identifier = "cp36-manylinux_aarch64", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-manylinux_aarch64", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-manylinux_aarch64", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_aarch64", version = "3.9", path_str = "/opt/python/cp39-cp39" },
-  { identifier = "cp35-manylinux_ppc64le", version = "3.5", path_str = "/opt/python/cp35-cp35m" },
   { identifier = "cp36-manylinux_ppc64le", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-manylinux_ppc64le", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-manylinux_ppc64le", version = "3.8", path_str = "/opt/python/cp38-cp38" },
   { identifier = "cp39-manylinux_ppc64le", version = "3.9", path_str = "/opt/python/cp39-cp39" },
-  { identifier = "cp35-manylinux_s390x", version = "3.5", path_str = "/opt/python/cp35-cp35m" },
   { identifier = "cp36-manylinux_s390x", version = "3.6", path_str = "/opt/python/cp36-cp36m" },
   { identifier = "cp37-manylinux_s390x", version = "3.7", path_str = "/opt/python/cp37-cp37m" },
   { identifier = "cp38-manylinux_s390x", version = "3.8", path_str = "/opt/python/cp38-cp38" },
@@ -31,7 +26,6 @@ python_configurations = [
 
 [macos]
 python_configurations = [
-  { identifier = "cp35-macosx_x86_64", version = "3.5", url = "https://www.python.org/ftp/python/3.5.4/python-3.5.4-macosx10.6.pkg" },
   { identifier = "cp36-macosx_x86_64", version = "3.6", url = "https://www.python.org/ftp/python/3.6.8/python-3.6.8-macosx10.9.pkg" },
   { identifier = "cp37-macosx_x86_64", version = "3.7", url = "https://www.python.org/ftp/python/3.7.9/python-3.7.9-macosx10.9.pkg" },
   { identifier = "cp38-macosx_x86_64", version = "3.8", url = "https://www.python.org/ftp/python/3.8.9/python-3.8.9-macosx10.9.pkg" },
@@ -44,8 +38,6 @@ python_configurations = [
 
 [windows]
 python_configurations = [
-  { identifier = "cp35-win32", version = "3.5.4", arch = "32" },
-  { identifier = "cp35-win_amd64", version = "3.5.4", arch = "64" },
   { identifier = "cp36-win32", version = "3.6.8", arch = "32" },
   { identifier = "cp36-win_amd64", version = "3.6.8", arch = "64" },
   { identifier = "cp37-win32", version = "3.7.9", arch = "32" },

cibuildwheel/windows.py

@@ -7,8 +7,6 @@
 from typing import Dict, List, NamedTuple, Optional, Sequence, Set
 from zipfile import ZipFile
 
-import toml
-
 from .architecture import Architecture
 from .environment import ParsedEnvironment
 from .logger import log
@@ -209,34 +207,6 @@ def setup_python(
     return env
 
 
-def pep_518_cp35_workaround(package_dir: Path, env: Dict[str, str]) -> None:
-    """
-    Python 3.5 PEP 518 hack (see https://github.com/pypa/pip/issues/8392#issuecomment-639563494)
-    Basically, nuget's Python is an embedded Python distribution, which is not supported by pip.
-    Before version 3.6, there was no way to disable the "embedded" behavior, including the ignoring
-    of environment variables, including the ones pip uses to setup PEP 518 builds.
-
-    The fix here is as suggested in that issue; we manually setup the PEP 518 requirements. Since we
-    are in a fresh environment (except for pinned cibuildweel dependencies), the build is already
-    mostly "isolated".
-    """
-
-    pyproject_path = package_dir / "pyproject.toml"
-
-    if pyproject_path.exists():
-        data = toml.load(pyproject_path)
-        requirements = data["build-system"].get("requires", []) if "build-system" in data else []
-
-        if requirements:
-            log.step("Performing PEP518 workaround...")
-            with tempfile.TemporaryDirectory() as d:
-                reqfile = Path(d) / "requirements.txt"
-                with reqfile.open("w") as f:
-                    for r in requirements:
-                        print(r, file=f)
-                call(["pip", "install", "-r", reqfile], env=env)
-
-
 def build(options: BuildOptions) -> None:
     temp_dir = Path(tempfile.mkdtemp(prefix="cibuildwheel"))
     built_wheel_dir = temp_dir / "built_wheel"
@@ -276,11 +246,6 @@ def build(options: BuildOptions) -> None:
                 )
                 shell(before_build_prepared, env=env)
 
-            # activate the PEP 518 patch if on Windows Python 3.5
-            # (will only have an effect if PEP 517 builds are used):
-            if config.version.startswith("3.5"):
-                pep_518_cp35_workaround(options.package_dir, env)
-
             log.step("Building wheel...")
             if built_wheel_dir.exists():
                 shutil.rmtree(built_wheel_dir)

docs/contributing.md

@@ -71,7 +71,6 @@ This has been moved to using docker, so you only need the following instructions
 The dependency update script in the next section requires multiple python versions installed. One way to do this is to use `pyenv`:
 
 ```bash
-pyenv install 3.5.9
 pyenv install 3.6.11
 pyenv install 3.7.8
 # Optionally add 3.8 and make it the local version;
@@ -81,7 +80,6 @@ pyenv install 3.7.8
 Then, you need to make the required virtual environments:
 
 ```bash
-$(pyenv prefix 3.5.9)/bin/python -m venv env35
 $(pyenv prefix 3.6.11)/bin/python -m venv env36
 $(pyenv prefix 3.7.8)/bin/python -m venv env37
 ```

docs/options.md

@@ -110,7 +110,7 @@ This option can also be set using the [command-line option](#command-line) `--pl
 
 > Choose the Python versions to build
 
-Space-separated list of builds to build and skip. Each build has an identifier like `cp27-manylinux_x86_64` or `cp35-macosx_x86_64` - you can list specific ones to build and cibuildwheel will only build those, and/or list ones to skip and cibuildwheel won't try to build them.
+Space-separated list of builds to build and skip. Each build has an identifier like `cp38-manylinux_x86_64` or `cp37-macosx_x86_64` - you can list specific ones to build and cibuildwheel will only build those, and/or list ones to skip and cibuildwheel won't try to build them.
 
 When both options are specified, both conditions are applied and only builds with a tag that matches `CIBW_BUILD` and does not match `CIBW_SKIP` will be built.
 
@@ -120,7 +120,6 @@ When setting the options, you can use shell-style globbing syntax, as per [fnmat
 
 |              | macOS                                                               | Windows                       | Manylinux Intel                               | Manylinux Other                                                            |
 |--------------|---------------------------------------------------------------------|-------------------------------|-----------------------------------------------|----------------------------------------------------------------------------|
-| Python 3.5   | cp35-macosx_x86_64                                                  | cp35-win_amd64<br/>cp35-win32 | cp35-manylinux_x86_64<br/>cp35-manylinux_i686 | cp35-manylinux_aarch64<br/>cp35-manylinux_ppc64le<br/>cp35-manylinux_s390x |
 | Python 3.6   | cp36-macosx_x86_64                                                  | cp36-win_amd64<br/>cp36-win32 | cp36-manylinux_x86_64<br/>cp36-manylinux_i686 | cp36-manylinux_aarch64<br/>cp36-manylinux_ppc64le<br/>cp36-manylinux_s390x |
 | Python 3.7   | cp37-macosx_x86_64                                                  | cp37-win_amd64<br/>cp37-win32 | cp37-manylinux_x86_64<br/>cp37-manylinux_i686 | cp37-manylinux_aarch64<br/>cp37-manylinux_ppc64le<br/>cp37-manylinux_s390x |
 | Python 3.8   | cp38-macosx_x86_64                                                  | cp38-win_amd64<br/>cp38-win32 | cp38-manylinux_x86_64<br/>cp38-manylinux_i686 | cp38-manylinux_aarch64<br/>cp38-manylinux_ppc64le<br/>cp38-manylinux_s390x |
@@ -155,8 +154,8 @@ CIBW_SKIP: cp36-win*
 # Skip CPython 3.6 on 32-bit Windows
 CIBW_SKIP: cp36-win32
 
-# Skip CPython 3.5 and CPython 3.6
-CIBW_SKIP: cp35-* cp36-*
+# Skip CPython 3.6 and CPython 3.7
+CIBW_SKIP: cp36-* cp37-*
 
 # Skip Python 3.6 on Linux
 CIBW_SKIP: cp36-manylinux*

docs/setup.md

@@ -109,9 +109,6 @@ To build Linux, Mac, and Windows wheels on Azure Pipelines, create a `azure-pipe
 {% include "../examples/azure-pipelines-minimal.yml" %}
 ```
 
-!!! note
-    To support Python 3.5 on Windows, make sure to specify the use of `{vmImage: 'vs2017-win2016'}` on Windows, to ensure the required toolchain is available.
-
 Commit this file, enable building of your repo on Azure Pipelines, and push.
 
 Wheels will be stored for you and available through the Pipelines interface. For more info on this file, check out the [docs](https://docs.microsoft.com/en-us/azure/devops/pipelines/yaml-schema).

test/test_dependency_versions.py

@@ -47,25 +47,17 @@ def get_versions_from_constraint_file(constraint_file):
     }
 
 
-@pytest.mark.parametrize("python_version", ["3.5", "3.6", "3.8", "3.9"])
+@pytest.mark.parametrize("python_version", ["3.6", "3.8", "3.9"])
 def test_pinned_versions(tmp_path, python_version):
     if utils.platform == "linux":
         pytest.skip("linux doesn't pin individual tool versions, it pins manylinux images instead")
 
-    is_macos_11_or_later = utils.platform == "macos" and utils.get_macos_version() >= (10, 16)
-
-    if is_macos_11_or_later and python_version == "3.5":
-        pytest.skip("CPython 3.5 doesn't work on macOS Big Sur+")
-
     project_dir = tmp_path / "project"
     project_with_expected_version_checks.generate(project_dir)
 
     build_environment = {}
 
-    if python_version == "3.5":
-        constraint_filename = "constraints-python35.txt"
-        build_pattern = "[cp]p35-*"
-    elif python_version == "3.6":
+    if python_version == "3.6":
         constraint_filename = "constraints-python36.txt"
         build_pattern = "[cp]p36-*"
     elif python_version == "3.7":
@@ -97,11 +89,7 @@ def test_pinned_versions(tmp_path, python_version):
     )
 
     # also check that we got the right wheels
-    if python_version == "3.5":
-        expected_wheels = [
-            w for w in utils.expected_wheels("spam", "0.1.0") if "-cp35" in w or "-pp35" in w
-        ]
-    elif python_version == "3.6":
+    if python_version == "3.6":
         expected_wheels = [
             w for w in utils.expected_wheels("spam", "0.1.0") if "-cp36" in w or "-pp36" in w
         ]
@@ -119,8 +107,7 @@ def test_pinned_versions(tmp_path, python_version):
     assert set(actual_wheels) == set(expected_wheels)
 
 
-@pytest.mark.parametrize("python_version", ["3.5", "3.x"])
-def test_dependency_constraints_file(tmp_path, python_version):
+def test_dependency_constraints_file(tmp_path):
     if utils.platform == "linux":
         pytest.skip("linux doesn't pin individual tool versions, it pins manylinux images instead")
 
@@ -129,7 +116,7 @@ def test_dependency_constraints_file(tmp_path, python_version):
 
     tool_versions = {
         "pip": "20.0.2",
-        "setuptools": "50.3.2" if python_version == "3.5" else "53.0.0",
+        "setuptools": "53.0.0",
         "wheel": "0.34.2",
         "virtualenv": "20.0.10",
     }
@@ -160,17 +147,11 @@ def test_dependency_constraints_file(tmp_path, python_version):
     actual_wheels = utils.cibuildwheel_run(
         project_dir,
         add_env={
-            "CIBW_BUILD": "cp35-*" if python_version == "3.5" else "[cp]p3?-*",
-            "CIBW_SKIP": "" if python_version == "3.5" else "cp35-*",
             "CIBW_ENVIRONMENT": cibw_environment_option,
             "CIBW_DEPENDENCY_VERSIONS": str(constraints_file),
         },
     )
 
     # also check that we got the right wheels
-    if python_version == "3.5":
-        expected_wheels = [w for w in utils.expected_wheels("spam", "0.1.0") if "-cp35" in w]
-    else:
-        expected_wheels = [w for w in utils.expected_wheels("spam", "0.1.0") if "-cp35" not in w]
-
+    expected_wheels = utils.expected_wheels("spam", "0.1.0")
     assert set(actual_wheels) == set(expected_wheels)

test/utils.py

@@ -131,15 +131,13 @@ def expected_wheels(
         else:
             manylinux_versions = ["manylinux2014"]
 
-    python_abi_tags = ["cp35-cp35m", "cp36-cp36m", "cp37-cp37m", "cp38-cp38", "cp39-cp39"]
+    python_abi_tags = ["cp36-cp36m", "cp37-cp37m", "cp38-cp38", "cp39-cp39"]
 
     if machine_arch in ["x86_64", "AMD64", "x86"]:
         python_abi_tags += ["pp36-pypy36_pp73", "pp37-pypy37_pp73"]
 
     if platform == "macos" and get_macos_version() >= (10, 16):
         # 10.16 is sometimes reported as the macOS version on macOS 11.
-        # CPython 3.5 doesn't work on macOS 11.
-        python_abi_tags.remove("cp35-cp35m")
         # pypy not supported on macOS 11.
         python_abi_tags = [t for t in python_abi_tags if not t.startswith("pp")]
 

unit_test/dependency_constraints_test.py

@@ -19,6 +19,3 @@ def test_defaults():
     assert dependency_constraints.get_for_python_version("3.6").samefile(
         resources_dir / "constraints-python36.txt"
     )
-    assert dependency_constraints.get_for_python_version("3.5").samefile(
-        resources_dir / "constraints-python35.txt"
-    )