Replace spaces in platform names with underscores

src/packaging/tags.py

@@ -467,8 +467,12 @@ def mac_platforms(
                 )
 
 
+def _normalized_sysconfig_platform() -> str:
+    return _normalize_string(sysconfig.get_platform().replace(" ", "_"))
+
+
 def _linux_platforms(is_32bit: bool = _32_BIT_INTERPRETER) -> Iterator[str]:
-    linux = _normalize_string(sysconfig.get_platform())
+    linux = _normalized_sysconfig_platform()
     if is_32bit:
         if linux == "linux_x86_64":
             linux = "linux_i686"
@@ -481,7 +485,7 @@ def _linux_platforms(is_32bit: bool = _32_BIT_INTERPRETER) -> Iterator[str]:
 
 
 def _generic_platforms() -> Iterator[str]:
-    yield _normalize_string(sysconfig.get_platform())
+    yield _normalized_sysconfig_platform()
 
 
 def platform_tags() -> Iterator[str]:

tests/test_tags.py

@@ -603,6 +603,13 @@ def test_platform_tags(platform_name, dispatch_func, monkeypatch):
     assert tags.platform_tags() == expected
 
 
+def test_platform_tags_space(monkeypatch):
+    """Ensure spaces in platform tags are normalized to underscores."""
+    monkeypatch.setattr(platform, "system", lambda: "Isilon OneFS")
+    monkeypatch.setattr(sysconfig, "get_platform", lambda: "isilon onefs")
+    assert list(tags.platform_tags()) == ["isilon_onefs"]
+
+
 class TestCPythonABI:
     @pytest.mark.parametrize(
         "py_debug,gettotalrefcount,result",
@@ -774,6 +781,12 @@ def test_platforms_defaults_needs_underscore(self, monkeypatch):
         result = list(tags.cpython_tags((3, 11), abis=["whatever"]))
         assert tags.Tag("cp311", "whatever", "plat1") in result
 
+    def test_platform_name_space_normalization(self, monkeypatch):
+        """Ensure that spaces are translated to underscores in platform names."""
+        monkeypatch.setattr(sysconfig, "get_platform", lambda: "isilon onefs")
+        for tag in tags.cpython_tags():
+            assert " " not in tag.platform
+
     def test_major_only_python_version(self):
         result = list(tags.cpython_tags((3,), ["abi"], ["plat"]))
         assert result == [
@@ -901,6 +914,12 @@ def test_generic_platforms(self):
         platform = platform.replace(".", "_")
         assert list(tags._generic_platforms()) == [platform]
 
+    def test_generic_platforms_space(self, monkeypatch):
+        """Ensure platform tags normalize spaces to underscores."""
+        platform_ = "isilon onefs"
+        monkeypatch.setattr(sysconfig, "get_platform", lambda: platform_)
+        assert list(tags._generic_platforms()) == [platform_.replace(" ", "_")]
+
     def test_iterator_returned(self):
         result_iterator = tags.generic_tags("sillywalk33", ["abi"], ["plat1", "plat2"])
         assert isinstance(result_iterator, collections.abc.Iterator)