If I do brew info formula and the formula is in another tap, I get told that, but no further info. If it's in cask, I can do brew cask info formula, but what if it's in another tap? How do I get the usual info?
brew info formula
brew cask info formula
From http://docs.brew.sh/brew-tap.html / https://github.com/Homebrew/brew/blob/master/docs/brew-tap.md#formula-duplicate-names:
If your tap contains a formula that is also present in homebrew/core, that’s fine, but it means that you must install it explicitly by default.
I'm guessing the formula you're trying to get info from also exists in homebrew/core (under the same formula name).
Say your "other" tap is https://github.com/Jmuccigr/homebrew-personal. An example may be:brew info Jmuccigr/personal/vim
brew info Jmuccigr/personal/vim
For the record (and my future lack of memory): brew tap lists the taps I'm using. Then brew info homebrew/boneyard/formula gets the info on the formula in the boneyard (for example).
brew info homebrew/boneyard/formula