Brew Formula: How can I define cask and external dependencies?

Question

I’m writing a brew formula for my own tap, having XQuartz and external sources (not available on brew) as dependencies. How can I include them in my formula?

Answer 1

In your Cask, if you need X11, you should add:

depends_on x11: true

if you need java 7 or higer:

depends_on_java '7+'

if you need exactly java 8:

depends_on_java '8'

if you need the formula nmap:

depends_on formula: 'nmap'

if you need the cask virtualbox:

depends_on cask: 'virtualbox'

if you need a minimum macOS version:

depends_on macos: '>= :mavericks'

if you need something that is nor a formula nor a cask add a formula or a cask for it.