FR: Glob blacklist dirs, add whitelist dirs

[patmaddox]

I have a repo that pulls in lots of dirs named *.jj and *.git - sometimes these include BUILD files that are invalid for please. I would like please to support globbing blacklist dirs, and allowing whitelist dirs. Currently, please only works on fixed paths.

This would support a "default deny" workflow, while still permitting specific dirs.

I am up for trying to implement this, and want to start the discussion.

[parse]
blacklistdirs = "**/*.git"
blacklistdirs = "**/*.jj"

whitelistdirs = "important-project.git"
whitelistdirs = "important-projects/*.jj"

[toastwaffle]

Hi Pat,

This seems like a reasonable change to make, as long as it can be made in a backwards compatible way. Unfortunately we're unlikely to have time to implement this any time soon, but if you have time to put together a pull request I'd be happy to review it!