ssh things

origin.sh

SOCK_LINK=/tmp/ssh_auth_sock_link
start_ssh_agent() {
	eval "$(ssh-agent -s)"
	ssh-add ~/.ssh/id_ed25519
	ln -vsnf $SSH_AUTH_SOCK $SOCK_LINK
}
if [[ $- == *i* ]] && ! [[ -e $SOCK_LINK ]]; then
	# Agent socket link doesn't exist - assume agent isn't running
	start_ssh_agent
fi
export SSH_AUTH_SOCK=$SOCK_LINK

remote.sh

SOCK_LINK=/tmp/ssh_auth_sock_link
SOCK_LOCK=/tmp/sock_lock
if [[ $- == *i* ]] && [[ $SSH_AUTH_SOCK ]] && [[ $SSH_AUTH_SOCK != $SOCK_LINK ]]; then
    # We have a sock
    # Open a lock for our sock
    exec {FD}<>$SOCK_LOCK

    # Flock our sock lock
    if ! flock -x -w 2 $FD; then
        echo "Failed to flock the sock lock"
    else
        # Sock lock has been flocked!
        ln -vsnf $SSH_AUTH_SOCK $SOCK_LINK
        flock -u $FD
    fi
fi
export SSH_AUTH_SOCK=$SOCK_LINK