osx-brew-gnu-coreutils-man.sh

# Short of learning how to actually configure OSX, here's a hacky way to use
# GNU manpages for programs that are GNU ones, and fallback to OSX manpages otherwise
# Borrowed from https://gist.github.com/quickshiftin/9130153
if which brew &> /dev/null; then
  if brew list | grep coreutils &> /dev/null; then
	alias man='_() { echo $1; man -M $(brew --prefix)/opt/coreutils/libexec/gnuman $1 1>/dev/null 2>&1;  if [ "$?" -eq 0 ]; then man -M $(brew --prefix)/opt/coreutils/libexec/gnuman $1; else man $1; fi }; _'
  fi
fi

Added a quick check to see if brew and coreutils are actually installed