[PATCH 1/1] buildtools: avoid break due to failure to cleanup temporary directory

[Andre Muezerie]

On Tue, May 06, 2025 at 01:47:03AM +0300, Dmitry Kozlyuk wrote:
> Hi Andre,
> 
> On 05.05.2025 22:46, Andre Muezerie wrote:
> >When compiling drivers on Windows, instances have been seen where a
> >temporary directory fails to get cleaned up due to
> >ERROR_SHARING_VIOLATION (32).
> >
> >Code inspection did not reveal problems with the DPDK code and scripts,
> >and this issue was only seen on Windows. Adding a 1 second sleep before
> >cleaning up the temporary directory seems to be effective, but to
> >guarantee that this break does not happen anymore, flag
> >"ignore_cleanup_errors" is set to "True".
> >
> >Signed-off-by: Andre Muezerie <andremue at linux.microsoft.com>
> >---
> >  buildtools/gen-pmdinfo-cfile.py | 10 +++++++++-
> >  1 file changed, 9 insertions(+), 1 deletion(-)
> >
> >diff --git a/buildtools/gen-pmdinfo-cfile.py b/buildtools/gen-pmdinfo-cfile.py
> >index 5fbd51658a..2ddbdb9502 100644
> >--- a/buildtools/gen-pmdinfo-cfile.py
> >+++ b/buildtools/gen-pmdinfo-cfile.py
> >@@ -6,9 +6,10 @@
> >  import subprocess
> >  import sys
> >  import tempfile
> >+import time
> >  _, tmp_root, ar, archive, output, *pmdinfogen = sys.argv
> >-with tempfile.TemporaryDirectory(dir=tmp_root) as temp:
> >+with tempfile.TemporaryDirectory(dir=tmp_root, ignore_cleanup_errors=True) as temp:
> >      paths = []
> >      for name in subprocess.run([ar, "t", archive], stdout=subprocess.PIPE,
> >                                 check=True).stdout.decode().splitlines():
> >@@ -19,3 +20,10 @@
> >                             check=True, cwd=temp)
> >              paths.append(os.path.join(temp, name))
> >      subprocess.run(pmdinfogen + paths + [output], check=True)
> >+
> >+    if os.name == "nt":
> >+        # Instances have been seen on Windows where the temporary directory fails to get cleaned
> >+        # up due to ERROR_SHARING_VIOLATION (32).
> >+        # The sleep below is a mitigation for that issue, while ignore_cleanup_errors=True avoids
> >+        # failures when the issue is hit despite the mitigation.
> >+        time.sleep(1)
> 
> Not fond of this timing hack at all.
> Meson 0.51 (minimum requirement is 0.57) introduced |@PRIVATE_DIR@
> for custom_target() [1].
> Can we use it to get rid of tempfile.TemporaryDirectory?
> 
> drivers/meson.build:
>     custom_target(command: [pmdinfo, '@PRIVATE_DIR@', ...], ...)
> 
> buildtools/gen-pmdinfo-cfile.py:
>     _, temp, ..., *pmdinfogen = sys.argv
>     for name in subprocess.run([ar, "t", ...):
>        ...
>        subprocess.run([ar, "x", ...], cwd=temp)
>        ...
> |
> 
> |[1]: https://mesonbuild.com/Reference-manual_functions.html#custom_target
> |

Yes, I like your suggestion. I'll send out a V2 with the change you suggested.
Thanks for providing all the details about custom_target() and @PRIVATE_DIR at .