What does Homebrew "-vd" argument mean?

Question

Could someone please explain the "-vd" argument used for brew commands? For example,

brew install --build-from-source --with-python -vd protobuf

Answer 1

It is possible to combine flags so -vd is shorthand for -v and -d. Looking at the documentation for Homebrew (https://docs.brew.sh/Manpage) shows us that for brew install -v means verbose and -d means debug.