keychain.sh

# NOTE: see http://www.dribin.org/dave/blog/archives/2007/11/28/ssh_agent_leopard/
# on leopard, DON'T run ssh-agent; just ssh-add and it will work.

export agentfile=/tmp/.ssh_agent

function start_ssh_agent() {
  echo > $agentfile
  chmod 600 $agentfile
  ssh-agent > $agentfile
  load_ssh_agent
}

function load_ssh_agent() {
  source $agentfile > /dev/null
}

function load_or_start_ssh_agent() {
  if [[ -f $agentfile ]]; then
    load_ssh_agent
  else
    start_ssh_agent
  fi  
}

alias ssh-agent=load_or_start_ssh_agent
ssh-agent