Read MacOS keychain in a shell function

read_keychain.bash

function keychain(){
  # Keychain access idea from https://github.com/defunkt/gist
  
  if [ "$1" ]; then
    security 2>&1 >/dev/null find-internet-password -gs "$1" | ruby -e 'puts $1 if STDIN.gets =~ /^password: \"(.*)\"$/'
  else
    echo No argument given. The following passwords are in your chain: >&2
    security dump-keychain | ruby -e 'ARGF.each_line{|line| puts $1 if line =~ /\"srvr\"<blob>=.(.*).$/}'
  fi
}