How to find package for installed file in Brew?

Question

How can I identify the package/formula for a given file, or a listing of all of a package\'s owned files, in Homebrew?

Answer 1

Find and brew prefix, (e.g. for opencv):

find `brew --prefix opencv3`/ -exec ls -l {} \;

(Please note judicious use of -exec, and never forget those \;'s, folks .. its how find knows that the -exec arg-list is finished..)