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{ lib, fetchurl, writeText, libguestfs-with-appliance, pkgsCross, qemu
, runCommand, cpio, writeShellApplication, sshPassword, sshPort, httpPort }:
let
updateName = "remarkable-ct-prototype-image-3.16.1.0-ferrari-public";
updateArchive = fetchurl {
url =
# TODO: this is not an official source. might be worth authenticating the updates
"https://storage.googleapis.com/remarkable-versions/${updateName}.swu";
hash = "sha256-cwx2qcvxZBX0wAprYKls8P+gthwJJQTceVIO+qdPm/w=";
};
xochitlConfig = writeText "xochitl.conf" ''
[General]
DeveloperPassword=${sshPassword}
wifion=false
WebInterfaceEnabled=true
IdleSuspendDelay=0
SuspendPowerOffDelay=0
'';
usbMacAddr = "52:54:00:12:34:56";
ifnameUdevRule = writeText "70-persistent-net.rules" ''
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", \
ATTR{address}=="${usbMacAddr}", \
ATTR{type}=="1", KERNEL=="eth*", NAME="usb0"
'';
xochitlService = writeText "xochitl.service" ''
[Unit]
Description=reMarkable main application
After=home.mount network.target
[Service]
ExecStart=/usr/bin/xochitl --system
Restart=always
# required to make xochitl run
# Environment=LD_PRELOAD=/usr/lib/libfakefbdev.so # TODO uncomment?
[Install]
WantedBy=multi-user.target
'';
fakefbdev = pkgsCross.aarch64-multiplatform.gcc11Stdenv.mkDerivation {
name = "fakefbdev";
src = ./fakefbdev;
installFlags = [ "DESTDIR=${placeholder "out"}" ];
};
kernel = pkgsCross.aarch64-multiplatform.linux;
rootfsImage = runCommand "rm-rootfs.ext4" { nativeBuildInputs = [ cpio ]; } ''
cpio -i --file ${updateArchive}
gzip -dc ${updateName}.ext4.verity.gz > $out
'';
diskImage = runCommand "rm-disk.qcow2" {
nativeBuildInputs = [ qemu libguestfs-with-appliance ];
} ''
qemu-img create -f qcow2 $out 8G
guestfish --rw --blocksize=512 --add $out <<EOF
run
# not the original partition table of the RMPP
part-init /dev/sda gpt
part-add /dev/sda p 2048 2099199
part-add /dev/sda p 2099200 10487807
part-add /dev/sda p 10487808 12584959
part-add /dev/sda p 12584960 16775167
mkfs ext4 /dev/sda1
upload ${rootfsImage} /dev/sda2
resize2fs /dev/sda2
mkswap /dev/sda3
mkfs ext4 /dev/sda4
mount /dev/sda2 /
copy-in ${kernel}/lib/modules /lib
download /etc/fstab fstab
! sed -i 's#mmcblk0p1#vda1#' fstab
! sed -i 's#/dev/mapper/home-encrypted-disk#/dev/vda4#' fstab
upload fstab /etc/fstab
download /etc/passwd passwd
! sed -i 's#/usr/sbin/rmdevlogin#/bin/sh#' passwd
upload passwd /etc/passwd
download /etc/shadow shadow
! sed -i 's/root:!:/root::/' shadow
upload shadow /etc/shadow
upload ${ifnameUdevRule} /etc/udev/rules.d/70-persistent-net.rules
# download /lib/systemd/system/dhcpcd.service dhcpcd.service
# ! sed -i 's/wlan/usb/' dhcpcd.service
# upload dhcpcd.service /lib/systemd/system/dhcpcd.service TODO
upload ${xochitlService} /lib/systemd/system/xochitl.service
# delete stuff which hinders boot
rm /lib/systemd/system/rm-sync.service
rm /lib/systemd/system/xochitl.service.d/xochitl-service-override.conf
rm /lib/systemd/system/wpa_supplicant.service
rm /lib/systemd/system/dropbear-wlan.socket
rm /lib/systemd/system/keystore.service
rm /lib/systemd/system/swapcryptor.service
rm /lib/systemd/system/homecryptor.service
rm /lib/systemd/system/growpart-home.service
rm /lib/systemd/system/memfault-attributes.service
rm /lib/systemd/system/swupdate.service
rm /lib/systemd/system/swupdate.socket
rm /lib/systemd/system/usb-ether-once.service
rm /lib/systemd/system/marker-manager.service
rm /lib/systemd/system/rm-sanity.timer
# upload ${fakefbdev}/lib/libfakefbdev.so /usr/lib/libfakefbdev.so
# chmod 0755 /usr/lib/libfakefbdev.so
mount /dev/sda4 /home
cp-a /etc/skel /home/root
mkdir-p /home/root/.local/share/remarkable/xochitl
mkdir-p /home/root/.config/remarkable
upload ${xochitlConfig} /home/root/.config/remarkable/xochitl.conf
EOF
'';
in writeShellApplication {
name = "reMder-server";
runtimeInputs = [ qemu ];
text = ''
qemu-img create -b ${diskImage} -F qcow2 -f qcow2 ./reMder.qcow2
qemu-system-aarch64 \
-enable-kvm \
-machine virt \
-cpu host \
-m 2048 \
-kernel ${kernel}/Image \
-drive if=none,file=./reMder.qcow2,format=qcow2,id=hd \
-device virtio-blk-device,drive=hd \
-netdev user,hostfwd=tcp::${toString sshPort}-:22,hostfwd=tcp::${
toString httpPort
}-:80,id=net \
-device virtio-net-device,netdev=net,mac=${usbMacAddr} \
-append "console=ttyAMA0 rootfstype=ext4 root=/dev/vda2 rw rootwait init=/sbin/init" \
-serial mon:stdio \
-nographic
'';
}
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