Currently, if you put a command like delocate-wheel dist/*.whl in tox.ini, that command (delocate-wheel) will get "dist/*.whl" string as its arg. But if you run it in shell, it'll get the list of matching paths.

Some programs are okay with that and apply glob internally while others don't know how to do this. Or, in case of delocate, it does it partially but has a bug where it outputs a file with an invalid filename called *.whl.

So in some cases, it's reasonable to want to expand a glob explicitly.

I suggest adding a new substitution syntax. This is what I have in mind:

commands =
  {envpython} -m some-command {glob:dist/*.whl} {glob:**/*.tar.gz:fallback/path/without/substitutions.txt} {env:VAR:{glob:fallback/*.zip}}

Refs:

• When delocate is called with a non-expanded wildcard path it produces wrong result matthew-brett/delocate#71
• twine<=3.1.1 bug: AttributeError: 'NoneType' object has no attribute 'group' pypa/twine#612