fix: do not use linux32 when unnecessary

.github/workflows/test.yml

@@ -62,6 +62,13 @@ jobs:
         sudo apt-get update
         sudo apt-get -y install podman
 
+    # free some space to prevent reaching GHA disk space limits
+    - name: Clean docker images
+      if: runner.os == 'Linux'
+      run: |
+        docker system prune -a -f
+        df -h
+
     - name: Install dependencies
       run: |
         python -m pip install ".[test]"

cibuildwheel/linux.py

@@ -423,7 +423,7 @@ def build(options: Options, tmp_path: Path) -> None:  # noqa: ARG001
 
             with OCIContainer(
                 image=build_step.container_image,
-                simulate_32_bit=build_step.platform_tag.endswith("i686"),
+                enforce_32_bit=build_step.platform_tag.endswith("i686"),
                 cwd=container_project_path,
                 engine=options.globals.container_engine,
             ) as container:

cibuildwheel/oci_container.py

@@ -17,7 +17,7 @@
 from typing import IO, Dict, Literal
 
 from .typing import PathOrStr, PopenBytes
-from .util import CIProvider, detect_ci_provider, parse_key_value_string
+from .util import CIProvider, call, detect_ci_provider, parse_key_value_string
 
 ContainerEngineName = Literal["docker", "podman"]
 
@@ -85,7 +85,7 @@ def __init__(
         self,
         *,
         image: str,
-        simulate_32_bit: bool = False,
+        enforce_32_bit: bool = False,
         cwd: PathOrStr | None = None,
         engine: OCIContainerEngineConfig = DEFAULT_ENGINE,
     ):
@@ -94,7 +94,7 @@ def __init__(
             raise ValueError(msg)
 
         self.image = image
-        self.simulate_32_bit = simulate_32_bit
+        self.enforce_32_bit = enforce_32_bit
         self.cwd = cwd
         self.name: str | None = None
         self.engine = engine
@@ -110,7 +110,17 @@ def __enter__(self) -> OCIContainer:
         if detect_ci_provider() == CIProvider.travis_ci and platform.machine() == "ppc64le":
             network_args = ["--network=host"]
 
-        shell_args = ["linux32", "/bin/bash"] if self.simulate_32_bit else ["/bin/bash"]
+        simulate_32_bit = self.enforce_32_bit
+        if self.enforce_32_bit:
+            # If the architecture running the image is already the right one
+            # or the image entrypoint takes care of enforcing this, then we don't need to
+            # simulate this
+            container_machine = call(
+                self.engine.name, "run", "--rm", self.image, "uname", "-m", capture_stdout=True
+            ).strip()
+            simulate_32_bit = container_machine != "i686"
+
+        shell_args = ["linux32", "/bin/bash"] if simulate_32_bit else ["/bin/bash"]
 
         subprocess.run(
             [

test/conftest.py

@@ -34,6 +34,8 @@ def build_frontend_env(request) -> dict[str, str]:
 @pytest.fixture()
 def docker_cleanup() -> Generator[None, None, None]:
     def get_images() -> set[str]:
+        if detect_ci_provider() is None or platform != "linux":
+            return set()
         images = subprocess.run(
             ["docker", "image", "ls", "--format", "{{json .ID}}"],
             text=True,
@@ -42,12 +44,6 @@ def get_images() -> set[str]:
         ).stdout
         return {json.loads(image.strip()) for image in images.splitlines() if image.strip()}
 
-    if detect_ci_provider() is None or platform != "linux":
-        try:
-            yield
-        finally:
-            pass
-        return
     images_before = get_images()
     try:
         yield

unit_test/oci_container_test.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import json
 import os
 import platform
 import random
@@ -13,33 +14,49 @@
 
 from cibuildwheel.environment import EnvironmentAssignmentBash
 from cibuildwheel.oci_container import OCIContainer, OCIContainerEngineConfig
+from cibuildwheel.util import detect_ci_provider
 
 # Test utilities
 
 # for these tests we use manylinux2014 images, because they're available on
 # multi architectures and include python3.8
+DEFAULT_IMAGE_TEMPLATE = "quay.io/pypa/manylinux2014_{machine}:2023-09-04-0828984"
 pm = platform.machine()
-if pm == "x86_64":
-    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_x86_64:2020-05-17-2f8ac3b"
+if pm in {"x86_64", "ppc64le", "s390x"}:
+    DEFAULT_IMAGE = DEFAULT_IMAGE_TEMPLATE.format(machine=pm)
 elif pm in {"aarch64", "arm64"}:
-    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_aarch64:2020-05-17-2f8ac3b"
-elif pm == "ppc64le":
-    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_ppc64le:2020-05-17-2f8ac3b"
-elif pm == "s390x":
-    DEFAULT_IMAGE = "quay.io/pypa/manylinux2014_s390x:2020-05-17-2f8ac3b"
+    DEFAULT_IMAGE = DEFAULT_IMAGE_TEMPLATE.format(machine="aarch64")
 else:
     DEFAULT_IMAGE = ""
 
 PODMAN = OCIContainerEngineConfig(name="podman")
 
 
-@pytest.fixture(params=["docker", "podman"])
+@pytest.fixture(params=["docker", "podman"], scope="module")
 def container_engine(request):
     if request.param == "docker" and not request.config.getoption("--run-docker"):
         pytest.skip("need --run-docker option to run")
     if request.param == "podman" and not request.config.getoption("--run-podman"):
         pytest.skip("need --run-podman option to run")
-    return OCIContainerEngineConfig(name=request.param)
+
+    def get_images() -> set[str]:
+        if detect_ci_provider() is None:
+            return set()
+        images = subprocess.run(
+            [request.param, "image", "ls", "--format", "{{json .ID}}"],
+            text=True,
+            check=True,
+            stdout=subprocess.PIPE,
+        ).stdout
+        return {json.loads(image.strip()) for image in images.splitlines() if image.strip()}
+
+    images_before = get_images()
+    try:
+        yield OCIContainerEngineConfig(name=request.param)
+    finally:
+        images_after = get_images()
+        for image in images_after - images_before:
+            subprocess.run([request.param, "rmi", image], check=False)
 
 
 # Tests
@@ -232,10 +249,9 @@ def test_environment_executor(container_engine):
         assert assignment.evaluated_value({}, container.environment_executor) == "42"
 
 
-def test_podman_vfs(tmp_path: Path, monkeypatch, request):
-    # Tests podman VFS, for the podman in docker use-case
-    if not request.config.getoption("--run-podman"):
-        pytest.skip("need --run-podman option to run")
+def test_podman_vfs(tmp_path: Path, monkeypatch, container_engine):
+    if container_engine.name != "podman":
+        pytest.skip("only runs with podman")
 
     # create the VFS configuration
     vfs_path = tmp_path / "podman_vfs"
@@ -311,9 +327,9 @@ def test_podman_vfs(tmp_path: Path, monkeypatch, request):
     subprocess.run(["podman", "unshare", "rm", "-rf", vfs_path], check=True)
 
 
-def test_create_args_volume(tmp_path: Path, request):
-    if not request.config.getoption("--run-docker"):
-        pytest.skip("need --run-docker option to run")
+def test_create_args_volume(tmp_path: Path, container_engine):
+    if container_engine.name != "docker":
+        pytest.skip("only runs with docker")
 
     if "CIRCLECI" in os.environ or "GITLAB_CI" in os.environ:
         pytest.skip(
@@ -378,3 +394,24 @@ def test_parse_engine_config(config, name, create_args):
     engine_config = OCIContainerEngineConfig.from_config_string(config)
     assert engine_config.name == name
     assert engine_config.create_args == create_args
+
+
+@pytest.mark.skipif(pm != "x86_64", reason="Only runs on x86_64")
+@pytest.mark.parametrize(
+    ("image", "shell_args"),
+    [
+        (DEFAULT_IMAGE_TEMPLATE.format(machine="i686"), ["/bin/bash"]),
+        (DEFAULT_IMAGE_TEMPLATE.format(machine="x86_64"), ["linux32", "/bin/bash"]),
+    ],
+)
+def test_enforce_32_bit(container_engine, image, shell_args):
+    with OCIContainer(engine=container_engine, image=image, enforce_32_bit=True) as container:
+        assert container.call(["uname", "-m"], capture_output=True).strip() == "i686"
+        container_args = subprocess.run(
+            f"{container.engine.name} inspect -f '{{{{json .Args }}}}' {container.name}",
+            shell=True,
+            check=True,
+            stdout=subprocess.PIPE,
+            text=True,
+        ).stdout
+        assert json.loads(container_args) == shell_args

unit_test/option_prepare_test.py

@@ -72,23 +72,23 @@ def test_build_default_launches(monkeypatch):
     kwargs = build_in_container.call_args_list[0][1]
     assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert not kwargs["container"]["simulate_32_bit"]
+    assert not kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-manylinux_x86_64" for x in ALL_IDS}
 
     kwargs = build_in_container.call_args_list[1][1]
     assert "quay.io/pypa/manylinux2014_i686" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert kwargs["container"]["simulate_32_bit"]
+    assert kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-manylinux_i686" for x in ALL_IDS}
 
     kwargs = build_in_container.call_args_list[2][1]
     assert "quay.io/pypa/musllinux_1_1_x86_64" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert not kwargs["container"]["simulate_32_bit"]
+    assert not kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
@@ -98,7 +98,7 @@ def test_build_default_launches(monkeypatch):
     kwargs = build_in_container.call_args_list[3][1]
     assert "quay.io/pypa/musllinux_1_1_i686" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert kwargs["container"]["simulate_32_bit"]
+    assert kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-musllinux_i686" for x in ALL_IDS if "pp" not in x}
@@ -141,7 +141,7 @@ def test_build_with_override_launches(monkeypatch, tmp_path):
     kwargs = build_in_container.call_args_list[0][1]
     assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert not kwargs["container"]["simulate_32_bit"]
+    assert not kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {"cp36-manylinux_x86_64"}
@@ -150,7 +150,7 @@ def test_build_with_override_launches(monkeypatch, tmp_path):
     kwargs = build_in_container.call_args_list[1][1]
     assert "quay.io/pypa/manylinux2014_x86_64" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert not kwargs["container"]["simulate_32_bit"]
+    assert not kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
@@ -162,7 +162,7 @@ def test_build_with_override_launches(monkeypatch, tmp_path):
     kwargs = build_in_container.call_args_list[2][1]
     assert "quay.io/pypa/manylinux_2_28_x86_64" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert not kwargs["container"]["simulate_32_bit"]
+    assert not kwargs["container"]["enforce_32_bit"]
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
         f"{x}-manylinux_x86_64"
@@ -172,15 +172,15 @@ def test_build_with_override_launches(monkeypatch, tmp_path):
     kwargs = build_in_container.call_args_list[3][1]
     assert "quay.io/pypa/manylinux2014_i686" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert kwargs["container"]["simulate_32_bit"]
+    assert kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-manylinux_i686" for x in ALL_IDS}
 
     kwargs = build_in_container.call_args_list[4][1]
     assert "quay.io/pypa/musllinux_1_1_x86_64" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert not kwargs["container"]["simulate_32_bit"]
+    assert not kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
@@ -190,7 +190,7 @@ def test_build_with_override_launches(monkeypatch, tmp_path):
     kwargs = build_in_container.call_args_list[5][1]
     assert "quay.io/pypa/musllinux_1_2_x86_64" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert not kwargs["container"]["simulate_32_bit"]
+    assert not kwargs["container"]["enforce_32_bit"]
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {
         f"{x}-musllinux_x86_64" for x in ALL_IDS - {"cp36", "cp37", "cp38", "cp39"} if "pp" not in x
@@ -199,7 +199,7 @@ def test_build_with_override_launches(monkeypatch, tmp_path):
     kwargs = build_in_container.call_args_list[6][1]
     assert "quay.io/pypa/musllinux_1_1_i686" in kwargs["container"]["image"]
     assert kwargs["container"]["cwd"] == PurePosixPath("/project")
-    assert kwargs["container"]["simulate_32_bit"]
+    assert kwargs["container"]["enforce_32_bit"]
 
     identifiers = {x.identifier for x in kwargs["platform_configs"]}
     assert identifiers == {f"{x}-musllinux_i686" for x in ALL_IDS if "pp" not in x}