ssh-agent

ssh-agent.sh

#!/bin/zsh

# Check for a currently running instance of ssh-agent
RUNNING_AGENT="$(ps -ax | grep 'ssh-agent' | grep -v grep | wc -l | tr -d '[:space:]')"
if [ "${RUNNING_AGENT}" = "0" ]; then
    # Launch a new instance of ssh-agent
    eval "$(ssh-agent)"
else
    # Connect to the existing ssh-agent instance
    export SSH_AUTH_SOCK="$(find /var/folders/*/*/*/ssh-* -name 'agent.*' -user "$(whoami)" 2> /dev/null | head -n 1)"
fi

# Check that ssh keys are loaded
ssh-add -l > /dev/null
if [ "${?}" != "0" ]; then
    # No ssh keys are loaded; add the default key
    ssh-add -q --apple-load-keychain
fi