pacman-init.service

[Unit]
Description=Initialize Pacman keyring
Wants=haveged.service
After=haveged.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStartPre=/usr/bin/rm -rf /etc/pacman.d/gnupg
ExecStart=/usr/bin/pacman-key --init
ExecStart=/usr/bin/pacman-key --populate archlinux archlinuxarm manjaro manjaro-arm
ExecStartPost=/usr/bin/systemctl disable pacman-init.service

[Install]
WantedBy=multi-user.target