Homebrew: list the packages installed from taps? : <p>Over time, I've installed a number of packages with Homebrew, mostly from the default repo of formulae (<a href="https://github.com/Homebrew/homebrew-core" rel="noreferrer">homebrew-core</a>), but some from other locations via <code>brew tap</code>.</p>

<p>Now I'm putting together some install scripts to make my dev environment more reproducible, and I'm trying to figure out which packages can be installed by a simple <code>brew install</code> and which require a <code>brew tap</code> beforehand.</p>

<p>The ability to <a href="http://docs.brew.sh/Querying-Brew.html" rel="noreferrer">query brew</a> has proved useful for figuring out which options I used for each package, but not for this tap-related question. Is there a way to do this without manually going through each package and seeing where it's available?</p>
