[Unit]
Description=Git SSH authentication via key for Github user %I
Wants=git.service
After=git.service

[Service]
Type=oneshot
RemainAfterExit=true
ExecStartPre=/bin/podman exec git install --owner 10000 --group 10000 --mode 0700 -d /var/lib/git/.ssh
ExecStartPre=/bin/podman exec git install -d /var/lib/git/.ssh/authorized_keys.d
ExecStartPre=/usr/bin/curl --silent --fail -o /tmp/%N.key https://github.com/%i.keys
ExecStart=/bin/sh -c 'podman cp /tmp/%N.key git:/var/lib/git/.ssh/authorized_keys.d/github-%i && rm -f /tmp/%N.key'
ExecStartPost=/bin/podman exec git sh -c "cat /var/lib/git/.ssh/authorized_keys.d/* > /tmp/authorized_keys"
ExecStartPost=/bin/podman exec git install --owner 10000 --group 10000 --mode 0600 /tmp/authorized_keys /var/lib/git/.ssh/authorized_keys
ExecStop=/bin/podman exec git rm -f /var/lib/git/.ssh/authorized_keys.d/github-%i
ExecStopPost=/bin/podman exec git sh -c "cat /var/lib/git/.ssh/authorized_keys.d/* > /tmp/authorized_keys"
ExecStopPost=/bin/podman exec git install --owner 10000 --group 10000 --mode 0600 /tmp/authorized_keys /var/lib/git/.ssh/authorized_keys

[Install]
WantedBy=multi-user.target