#14489 `./pants update-build-files --check` will fail for a `Permission denied` issue when changes needed Issue created by charlesoconor Describe the bug

./pants update-build-files --check

will fail with

15:20:56.90 [ERROR] 1 Exception encountered:
  ProcessExecutionFailure: Process 'Run Black on python/test/BUILD.pants.' failed with exit code 123.
stdout:

stderr:
error: cannot format python/mlop/BUILD.pants: [Errno 13] Permission denied: 'python/test/BUILD.pants'
Oh no! 💥 💔 💥
1 file failed to reformat.
Use --no-process-execution-local-cleanup to preserve process chroots for inspection.

When running outside of remove execution everything seems to work as expected. My assumption of what's going on here is that changes are required for

python/test/BUILD.pants

. When it's sent over to Build barn or any RE runner the files are removed of their write permission. There is an issue in

update-build-files

where

--check

isn't being propagated to the remote action. Found the command to be

./black.pex_pex_shim.sh python/test/BUILD.pants

in my BB logs which I assume should have a

--check

flag as well. This does correctly fail build on CI when the build files haven't been updated but would be nice to get the better error message pants gives. Pants version

2.8.0

OS

macosx locally 
linux for RE and CI

Additional info Some screenshots from my BB scheduler. pantsbuild/pants

#14489 `./pants update-build-files --check` will fail for a `Permission denied` issue when changes needed Issue reopened by charlesoconor pantsbuild/pants