[Unit]
Description=SSH key agent

[Service]
Type=simple
Environment=SSH_AUTH_SOCK=%h/.local/state/ssh-agent/socket
ExecStartPre=/usr/bin/mkdir -p %h/.local/state/ssh-agent
ExecStartPre=/usr/bin/rm -f %h/.local/state/ssh-agent/socket
ExecStart=/usr/bin/ssh-agent -D -a %h/.local/state/ssh-agent/socket
Restart=on-failure

[Install]
WantedBy=default.target