[Unit]
Description=Git SSH authentication via public key file %I
Wants=git.service
After=git.service
ConditionPathExists=%I

[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
ExecStart=/bin/podman cp %I git:/var/lib/git/.ssh/authorized_keys.d/%i
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/%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