brew-install-missings.sh

#!/usr/bin/env bash

brew missing | awk 'BEGIN { print "Installing missing formulae..." }
    {
        split($0, a)
        for (i = 2; i <= NF; i++) {
            dep = a[i]
            if (!installed[dep]) {
                print "\n------------------------------------------------------------"
                print "Installing dependencies for " $1

                system("brew desc " dep)
                system("brew install " dep)
                installed[dep] = 1
            }
        }
    }
    END { print "\nDone" }'