VirtualCodebase walk issue

[JonoYang]

When I create a VirtualCodebase from the following data:

[{'is_file': False, 'path': 'to', 'sha1': '', 'size': 4096},
 {'is_file': False, 'path': 'to/to', 'sha1': '', 'size': 4096},
 {'is_file': True,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar',
  'sha1': '07bfa85a425faacf3f1dcbda3ac13c9ff0a00f43',
  'size': 10424},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract',
  'sha1': '',
  'size': 4096},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22',
  'sha1': '',
  'size': 4096},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com',
  'sha1': '',
  'size': 4096},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay',
  'sha1': '',
  'size': 4096},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal',
  'sha1': '',
  'size': 4096},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika',
  'sha1': '',
  'size': 4096},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal',
  'sha1': '',
  'size': 4096},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator',
  'sha1': '',
  'size': 4096},
 {'is_file': True,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator/TikaBundleActivator.class',
  'sha1': '04bce1304882d0d1d1f851d4b0484bfd22df9956',
  'size': 853},
 {'is_file': False,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/META-INF',
  'sha1': '',
  'size': 4096},
 {'is_file': True,
  'path': 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/META-INF/MANIFEST.MF',
  'sha1': 'b259041906b9cc9db46a87ac5db538c8b2e59cce',
  'size': 32212}]

I get into a strange loop when I try to use walk() on it.

to
to/to
to/com.liferay.portal.tika-1.0.22.jar-extract
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator
to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator
...

We never end up visiting the resource 'to/to/com.liferay.portal.tika-1.0.22.jar-extract/com.liferay.portal.tika-1.0.22/com/liferay/portal/tika/internal/activator/TikaBundleActivator.class, and most of the paths start with to, instead of to/to.

Looking into the problem, I see in commoncode.resource._get_parent_directory() that we are not properly appending the root path prefix when we are seeing if a path segment resource exists: https://github.com/nexB/commoncode/blob/main/src/commoncode/resource.py#L2037

[JonoYang]

This fix has been merged into v31.0.3