[Unit]
Description=SSH publickey authentication agent

[Service]
Type=simple
Environment=SSH_AUTH_SOCK=%t/ssh-agent.sock
ExecStart=/usr/bin/ssh-agent -D -a ${SSH_AUTH_SOCK} -t 2h
ExecStartPost=/usr/bin/systemctl --user set-environment SSH_AUTH_SOCK=${SSH_AUTH_SOCK}
ExecStopPost=/usr/bin/systemctl --user unset-environment SSH_AUTH_SOCK=${SSH_AUTH_SOCK}

[Install]
WantedBy=default.target