Custom Filters cannot be passed in from the command line

[a-weiss-programmer]

• I'm submitting a ...

  • bug report
  • feature request

• What is the current behavior?
  Adding a custom filter by file when doing a command line scan is not working. When trying to pass a custom filter as described in the document, a command line usage error comes back saying "detect-secrets scan: error: argument -f/--filter: Did not specify function name for imported file."

• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem

1. Install detect-secrets
2. Create a custom_filter.py script with the given filter in the documentation
3. Invoke the command below the example script provided in the filter documentation
   

• What is the expected behavior?
  The expected behavior is that the filter would be picked up properly. This functionality works when invoking detect secrets from a separate python program.

• What is the motivation / use case for changing the behavior?
  Allows for proper usage of the command line behavior provided

• Please tell us about your environment:

  • detect-secrets Version: 1.4.30
  • Python Version: 3.11.5
  • OS Version: Ubuntu 22.04.3 LTS (Windows Subsystem for Linux)
  • File type (if applicable):

• Other information
  This is most likely an issue with urllib parsing of the file in the filters usage file, as urlparse returns a ParseResult where the netloc property is populated with the filepath instead of the path property, since the scheme is file based.