Show man page for keg-only Homebrew formulae

brewman.sh

# show man page for keg-only Homebrew formulae (e.g. strings of binutils)
# usage: brewman name (name is the  name of the manual page)
# example: brewman strings

# resolve symbolic link pointing to cellar of Homebrew formula
function cellar ()
{
  formula_name=$1
  pushd /usr/local/opt >/dev/null
  pushd $(readlink /usr/local/opt/$1) >/dev/null
  pwd -P
  popd >/dev/null
  popd >/dev/null
}

# show man page for keg-only Homebrew formulae
function brewman ()
{
  name=$1
  formula_name=$(brew which-formula $name)
  cellar_path=$(cellar $formula_name)
  man -M $cellar_path/share/man $name
}

export -f brewman