fix: support Docker 29 (#2660)

* fix: support Docker 29

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* refactor: closer to actual case, lambda

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

---------

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

cibuildwheel/oci_container.py

@@ -116,11 +116,14 @@ DEFAULT_ENGINE = OCIContainerEngineConfig("docker")
 def _check_engine_version(engine: OCIContainerEngineConfig) -> None:
     try:
         version_string = call(engine.name, "version", "-f", "{{json .}}", capture_stdout=True)
-        version_info = json.loads(version_string.strip())
+        # We are using lowercase keys for all dicts so we are not affected by casing of keys
+        version_info = json.loads(
+            version_string.strip(), object_pairs_hook=lambda inp: {k.lower(): v for k, v in inp}
+        )
         match engine.name:
             case "docker":
-                client_api_version = FlexibleVersion(version_info["Client"]["ApiVersion"])
-                server_api_version = FlexibleVersion(version_info["Server"]["ApiVersion"])
+                client_api_version = FlexibleVersion(version_info["client"]["apiversion"])
+                server_api_version = FlexibleVersion(version_info["server"]["apiversion"])
                 # --platform support was introduced in 1.32 as experimental, 1.41 removed the experimental flag
                 version = min(client_api_version, server_api_version)
                 minimum_version = FlexibleVersion("1.41")
@@ -135,9 +138,9 @@ def _check_engine_version(engine: OCIContainerEngineConfig) -> None:
                 )
             case "podman":
                 # podman uses the same version string for "Version" & "ApiVersion"
-                client_version = FlexibleVersion(version_info["Client"]["Version"])
-                if "Server" in version_info:
-                    server_version = FlexibleVersion(version_info["Server"]["Version"])
+                client_version = FlexibleVersion(version_info["client"]["version"])
+                if "server" in version_info:
+                    server_version = FlexibleVersion(version_info["server"]["version"])
                 else:
                     server_version = client_version
                 # --platform support was introduced in v3

unit_test/oci_container_test.py

@@ -628,6 +628,11 @@ def test_multiarch_image(container_engine, platform):
             '{"Client":{"Version":"24.0.0","ApiVersion":"1.43"},"Server":{"ApiVersion":"1.43"}}',
             nullcontext(),
         ),
+        (
+            "docker",
+            '{"Client":{"Version":"29.0.0","ApiVersion":"1.52"},"Server":{"APIVersion":"1.52"}}',
+            nullcontext(),
+        ),
         (
             "docker",
             '{"Client":{"ApiVersion":"1.43"},"Server":{"ApiVersion":"1.30"}}',