Do not download golang package if it is installed already

[renannprado]

I have a golang installed and in my PATH.
I believe that the the formula should not try to install golang again if I have it installed (not through a formula).

[m1kola]

brew install has the --ignore-dependencies option. It's not ideal, but brew install --ignore-dependencies go-delve/delve/delve will, probably, work for you.

[utdrmac]

+1 The Homebrew system should be smart enough to know I already have a dependency installed and should not attempt to download it again