build_file_import_whitelist = os.path doesn't work

[project]
  build_file_import_whitelist = os.path

doesn’t work—I get the error

AttributeError: Using function expanduser is forbidden in the safe version of module os.path. If you really need to use this function read about allow_unsafe_import() documented at: https://buckbuild.com/function/allow_unsafe_import.html

Is this because the module name has multiple parts? Is it because Buck already imports the “safe” version of os.path? How can I whitelist os.path methods without using allow_unsafe_import() everywhere?

[jiangty-addepar]

Oh, that’s even simpler than what I was thinking! Nice 😃

[ttsugriy]

using os.path.exists() to check for test resources directory is a bad idea, because buck is not aware of this and would have no way to know what exactly should be invalidated and in you can easily end up in a situation with non-reproducible and hard to understand failure. If nothing else you can probably at least use something like:

test_resources = glob(['your_pattern'])
if test_resources:
  # handle test resources
else:
  # there are no test resources