feature: add support for py3-none-{platform} wheels

This extends the mechanism introduced in pypa#1091 for `abi3` wheels.
Most of the mentions to `abi3` have been removed and replaced by a more generic `compatible_wheel`.
This allows to build a wheel `foo-0.1-py3-none-win_amd64.whl` only once and still test with every configured python.

cibuildwheel/linux.py

@@ -12,7 +12,7 @@
 from .util import (
     BuildSelector,
     NonPlatformWheelError,
-    find_compatible_abi3_wheel,
+    find_compatible_wheel,
     get_build_verbosity_extra_flags,
     prepare_command,
     read_python_configs,
@@ -177,13 +177,13 @@ def build_on_docker(
             )
             sys.exit(1)
 
-        abi3_wheel = find_compatible_abi3_wheel(built_wheels, config.identifier)
-        if abi3_wheel:
+        compatible_wheel = find_compatible_wheel(built_wheels, config.identifier)
+        if compatible_wheel:
             log.step_end()
             print(
-                f"\nFound previously built wheel {abi3_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
+                f"\nFound previously built wheel {compatible_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
             )
-            repaired_wheels = [abi3_wheel]
+            repaired_wheels = [compatible_wheel]
         else:
 
             if build_options.before_build:
@@ -304,7 +304,7 @@ def build_on_docker(
             docker.call(["rm", "-rf", venv_dir])
 
         # move repaired wheels to output
-        if abi3_wheel is None:
+        if compatible_wheel is None:
             docker.call(["mkdir", "-p", container_output_dir])
             docker.call(["mv", *repaired_wheels, container_output_dir])
             built_wheels.extend(

cibuildwheel/macos.py

@@ -23,7 +23,7 @@
     call,
     detect_ci_provider,
     download,
-    find_compatible_abi3_wheel,
+    find_compatible_wheel,
     get_build_verbosity_extra_flags,
     get_pip_version,
     install_certifi_script,
@@ -321,13 +321,13 @@ def build(options: Options, tmp_path: Path) -> None:
                 build_options.build_frontend,
             )
 
-            abi3_wheel = find_compatible_abi3_wheel(built_wheels, config.identifier)
-            if abi3_wheel:
+            compatible_wheel = find_compatible_wheel(built_wheels, config.identifier)
+            if compatible_wheel:
                 log.step_end()
                 print(
-                    f"\nFound previously built wheel {abi3_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
+                    f"\nFound previously built wheel {compatible_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
                 )
-                repaired_wheel = abi3_wheel
+                repaired_wheel = compatible_wheel
             else:
                 if build_options.before_build:
                     log.step("Running before_build...")
@@ -534,7 +534,7 @@ def build(options: Options, tmp_path: Path) -> None:
                     )
 
             # we're all done here; move it to output (overwrite existing)
-            if abi3_wheel is None:
+            if compatible_wheel is None:
                 try:
                     (build_options.output_dir / repaired_wheel.name).unlink()
                 except FileNotFoundError:

cibuildwheel/util.py

@@ -54,7 +54,7 @@
     "MANYLINUX_ARCHS",
     "call",
     "shell",
-    "find_compatible_abi3_wheel",
+    "find_compatible_wheel",
     "format_safe",
     "prepare_command",
     "get_build_verbosity_extra_flags",
@@ -574,23 +574,25 @@ def virtualenv(
 T = TypeVar("T", bound=PurePath)
 
 
-def find_compatible_abi3_wheel(wheels: Sequence[T], identifier: str) -> Optional[T]:
+def find_compatible_wheel(wheels: Sequence[T], identifier: str) -> Optional[T]:
     """
-    Finds an ABI3 wheel in `wheels` compatible with the Python interpreter
+    Finds a wheel with an abi3 or a none ABI tag in `wheels` compatible with the Python interpreter
     specified by `identifier`.
     """
 
     interpreter, platform = identifier.split("-")
-    if not interpreter.startswith("cp3"):
-        return None
     for wheel in wheels:
         _, _, _, tags = parse_wheel_filename(wheel.name)
         for tag in tags:
-            if tag.abi != "abi3":
-                continue
-            if not tag.interpreter.startswith("cp3"):
+            if tag.abi == "abi3":
+                if not (interpreter.startswith("cp3") and tag.interpreter.startswith("cp3")):
+                    continue
+            elif tag.abi == "none":
+                if tag.interpreter[:3] != "py3":
+                    continue
+            else:
                 continue
-            if int(tag.interpreter[3:]) > int(interpreter[3:]):
+            if tag.interpreter != "py3" and int(tag.interpreter[3:]) > int(interpreter[3:]):
                 continue
             if platform.startswith(("manylinux", "musllinux", "macosx")):
                 # Linux, macOS

cibuildwheel/windows.py

@@ -22,7 +22,7 @@
     NonPlatformWheelError,
     call,
     download,
-    find_compatible_abi3_wheel,
+    find_compatible_wheel,
     get_build_verbosity_extra_flags,
     get_pip_version,
     prepare_command,
@@ -277,13 +277,13 @@ def build(options: Options, tmp_path: Path) -> None:
                 build_options.build_frontend,
             )
 
-            abi3_wheel = find_compatible_abi3_wheel(built_wheels, config.identifier)
-            if abi3_wheel:
+            compatible_wheel = find_compatible_wheel(built_wheels, config.identifier)
+            if compatible_wheel:
                 log.step_end()
                 print(
-                    f"\nFound previously built wheel {abi3_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
+                    f"\nFound previously built wheel {compatible_wheel.name}, that's compatible with {config.identifier}. Skipping build step..."
                 )
-                repaired_wheel = abi3_wheel
+                repaired_wheel = compatible_wheel
             else:
                 # run the before_build command
                 if build_options.before_build:
@@ -418,7 +418,7 @@ def build(options: Options, tmp_path: Path) -> None:
                 shell(test_command_prepared, cwd="c:\\", env=virtualenv_env)
 
             # we're all done here; move it to output (remove if already exists)
-            if abi3_wheel is None:
+            if compatible_wheel is None:
                 shutil.move(str(repaired_wheel), build_options.output_dir)
                 built_wheels.append(build_options.output_dir / repaired_wheel.name)
 

unit_test/utils_test.py

@@ -1,4 +1,8 @@
-from cibuildwheel.util import format_safe, prepare_command
+from pathlib import PurePath
+
+import pytest
+
+from cibuildwheel.util import find_compatible_wheel, format_safe, prepare_command
 
 
 def test_format_safe():
@@ -46,3 +50,41 @@ def test_prepare_command():
         prepare_command("{a}{a,b}{b:.2e}{c}{d%s}{e:3}{f[0]}", a="42", b="3.14159")
         == "42{a,b}{b:.2e}{c}{d%s}{e:3}{f[0]}"
     )
+
+
+@pytest.mark.parametrize(
+    "wheel,identifier",
+    (
+        ("foo-0.1-cp38-abi3-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-cp38-abi3-macosx_11_0_x86_64.whl", "cp310-macosx_x86_64"),
+        ("foo-0.1-cp38-abi3-manylinux2014_x86_64.whl", "cp310-manylinux_x86_64"),
+        ("foo-0.1-cp38-abi3-musllinux_1_1_x86_64.whl", "cp310-musllinux_x86_64"),
+        ("foo-0.1-py2.py3-none-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-py2.py3-none-win_amd64.whl", "pp310-win_amd64"),
+        ("foo-0.1-py3-none-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-py38-none-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-py38-none-win_amd64.whl", "pp310-win_amd64"),
+    ),
+)
+def test_find_compatible_wheel_found(wheel: str, identifier: str):
+    wheel_ = PurePath(wheel)
+    found = find_compatible_wheel([wheel_], identifier)
+    assert found is wheel_
+
+
+@pytest.mark.parametrize(
+    "wheel,identifier",
+    (
+        ("foo-0.1-cp38-abi3-win_amd64.whl", "cp310-win32"),
+        ("foo-0.1-cp38-abi3-win_amd64.whl", "cp37-win_amd64"),
+        ("foo-0.1-cp38-abi3-macosx_11_0_x86_64.whl", "cp310-macosx_universal2"),
+        ("foo-0.1-cp38-abi3-manylinux2014_x86_64.whl", "cp310-musllinux_x86_64"),
+        ("foo-0.1-cp38-abi3-musllinux_1_1_x86_64.whl", "cp310-manylinux_x86_64"),
+        ("foo-0.1-py2-none-win_amd64.whl", "cp310-win_amd64"),
+        ("foo-0.1-py38-none-win_amd64.whl", "cp37-win_amd64"),
+        ("foo-0.1-py38-none-win_amd64.whl", "pp37-win_amd64"),
+        ("foo-0.1-cp38-cp38-win_amd64.whl", "cp310-win_amd64"),
+    ),
+)
+def test_find_compatible_wheel_not_found(wheel: str, identifier: str):
+    assert find_compatible_wheel([PurePath(wheel)], identifier) is None