setup: skip building rust extensions on Windows Without this, the build process in the next commit would have started trying (and failing) to copy the associated module. Not sure why this worked before. I'd like to think there's a better way to conditionalize this inside the extension declaration. [snip] done updating hg.exe's manifest copying build\lib.win-amd64-cpython-39\mercurial\cext\base85.cp39-win_amd64.pyd -> mercurial\cext copying build\lib.win-amd64-cpython-39\mercurial\cext\bdiff.cp39-win_amd64.pyd -> mercurial\cext copying build\lib.win-amd64-cpython-39\mercurial\cext\mpatch.cp39-win_amd64.pyd -> mercurial\cext copying build\lib.win-amd64-cpython-39\mercurial\cext\parsers.cp39-win_amd64.pyd -> mercurial\cext copying build\lib.win-amd64-cpython-39\mercurial\cext\osutil.cp39-win_amd64.pyd -> mercurial\cext copying build\lib.win-amd64-cpython-39\mercurial\thirdparty\sha1dc.cp39-win_amd64.pyd -> mercurial\thirdparty copying build\lib.win-amd64-cpython-39\hgext\fsmonitor\pywatchman\bser.cp39-win_amd64.pyd -> hgext\fsmonitor\pywatchman error: can't copy 'build\lib.win-amd64-cpython-39\mercurial\rustext.cp39-win_amd64.pyd': doesn't exist or not a regular file

--- a/setup.py	Wed Dec 04 22:52:58 2024 +0100
+++ b/setup.py	Mon Dec 30 20:56:19 2024 -0500
@@ -1659,18 +1659,21 @@
         ['hgext/fsmonitor/pywatchman/bser.c'],
         extra_compile_args=common_cflags,
     ),
-    RustStandaloneExtension(
-        'mercurial.rustext',
-        'hg-cpython',
-        'librusthg',
-    ),
-    RustStandaloneExtension(
-        'mercurial.pyo3_rustext',
-        'hg-pyo3',
-        'librusthgpyo3',
-    ),
 ]
 
+if os.name != 'nt':
+    extmodules += [
+        RustStandaloneExtension(
+            'mercurial.rustext',
+            'hg-cpython',
+            'librusthg',
+        ),
+        RustStandaloneExtension(
+            'mercurial.pyo3_rustext',
+            'hg-pyo3',
+            'librusthgpyo3',
+        ),
+    ]
 
 sys.path.insert(0, 'contrib/python-zstandard')
 import setup_zstd