Flattened podman support commits

cibuildwheel/linux.py

@@ -320,12 +320,16 @@ def build_on_docker(
 
 
 def build(options: Options, tmp_path: Path) -> None:  # pylint: disable=unused-argument
+
+    build_opts = options.build_options(None)
     try:
         # check docker is installed
-        subprocess.run(["docker", "--version"], check=True, stdout=subprocess.DEVNULL)
+        subprocess.run(
+            [build_opts.container_engine, "--version"], check=True, stdout=subprocess.DEVNULL
+        )
     except subprocess.CalledProcessError:
         print(
-            "cibuildwheel: Docker not found. Docker is required to run Linux builds. "
+            f"cibuildwheel: {build_opts.container_engine} not found. An OCI exe like Docker or Podman is required to run Linux builds "
             "If you're building on Travis CI, add `services: [docker]` to your .travis.yml."
             "If you're building on Circle CI in Linux, add a `setup_remote_docker` step to your .circleci/config.yml",
             file=sys.stderr,
@@ -355,6 +359,7 @@ def build(options: Options, tmp_path: Path) -> None:  # pylint: disable=unused-a
                 docker_image=build_step.docker_image,
                 simulate_32_bit=build_step.platform_tag.endswith("i686"),
                 cwd=container_project_path,
+                container_engine=build_opts.container_engine,
             ) as docker:
 
                 build_on_docker(