[fmt] Implement --no-ignore-vcs

[ken-matsui]

Like poac lint ignores gitignored files by default, poac fmt also wants to ignore those files. Also, we want --no-ignore-vcs to disable this default behavior.

https://github.com/poac-dev/poac/blob/f32c76033c9d70f7b36440e36590c30fda5930ce/src/Cmd/Lint.cc#L37-L49

[Processor228]

Doesn't fmt already support ignoring?
https://github.com/cabinpkg/cabin/blob/main/src/Cmd/Fmt.cc#L67
here, repo.isIgnored() makes this check. It is also strange that cabin lint parses .gitignore itself, only in current directory, which is not ideal, because in subdirectories, other .gitignore files may be, and files they list would not be excluded. repo.isIngored() is better.

So the issue is just about implementing --no-ignore-vcs flag ?

[ken-matsui]

Yeah looks so

[ken-matsui]

Thanks for pointing this out