sops fails to match path_regex on Windows because it encounters '\', not '/'

[cameronkerrnz]

Given a directory called my-local on Windows, the following will FAIL to match

creation_rules:
  - path_regex: .*/my-local/.*
    ...

But the following will:

creation_rules:
  # Sigh; must match the native idea of what filepath separator is used...
  - path_regex: .*[/\\]my-local[/\\].*
    ...

Windows 10 20H2
sops 3.7.1 (latest)

WSL-2 is not being used; sops is being run from a PowerShell session

Sops should ideally canonicalise the path separator, perhaps following established behaviour in the likes of .gitignore and .dockerignore files.

Documenting what the regex would begin to match on would be good too and any implicit anchoring that may be in effect.

[Moskovych]

@autrilla @ajvb
Is there any chance to clarify the behavior of sops regex match?
Should we duplicate the records for Linux/MacOS and Windows separately?
Or write complex universal matches?

[felixfontein]

See also #1036 and #1523.