99 lines
2.8 KiB
Nix
99 lines
2.8 KiB
Nix
{ gptfdisk
|
|
, e2fsprogs
|
|
, util-linux
|
|
, zstd
|
|
, btrfs-progs
|
|
, vmTools
|
|
, runCommand
|
|
, jq
|
|
, kmod
|
|
, udev
|
|
, nix
|
|
, lkl
|
|
|
|
, bpiR3Stuff
|
|
, config
|
|
, rootfsImage
|
|
, ... }:
|
|
|
|
let
|
|
imageSize = 7818182656;
|
|
bl2Start = 34;
|
|
bl2End = 8191;
|
|
envStart = 8192;
|
|
envEnd = 9215;
|
|
factoryStart = 9216;
|
|
factoryEnd = 13311;
|
|
fipStart = 13312;
|
|
fipEnd = 17407;
|
|
rootPartStart = fipEnd + 1;
|
|
rootPartEnd = builtins.floor (imageSize / 512) - 100;
|
|
in
|
|
|
|
# the vm is suuuuuper slow
|
|
# so, do as much as possible outside of it
|
|
# but i still need it to create subvolumes
|
|
|
|
vmTools.runInLinuxVM (runCommand "bpi-r3-fs" {
|
|
enableParallelBuildingByDefault = true;
|
|
nativeBuildInputs = [
|
|
btrfs-progs
|
|
# dosfstools
|
|
e2fsprogs
|
|
util-linux # sfdisk
|
|
config.system.build.nixos-install
|
|
jq
|
|
kmod
|
|
udev
|
|
gptfdisk
|
|
zstd
|
|
nix
|
|
lkl
|
|
];
|
|
preVM = ''
|
|
img=./result.img
|
|
${vmTools.qemu}/bin/qemu-img create -f raw $img 7818182656
|
|
truncate -s ${toString imageSize} $img
|
|
|
|
${gptfdisk}/bin/sgdisk -o \
|
|
--set-alignment=2 \
|
|
-n 1:${toString bl2Start}:${toString bl2End} -c 1:bl2 -A 1:set:2 \
|
|
-n 2:${toString envStart}:${toString envEnd} -c 2:u-boot-env \
|
|
-n 3:${toString factoryStart}:${toString factoryEnd} -c 3:factory \
|
|
-n 4:${toString fipStart}:${toString fipEnd} -c 4:fip \
|
|
-n 5:${toString rootPartStart}:${toString rootPartEnd} -c 5:root -A 5:set:2 \
|
|
$img
|
|
dd conv=notrunc if=${bpiR3Stuff}/bl2.img of=$img seek=${toString bl2Start}
|
|
dd conv=notrunc if=${bpiR3Stuff}/fip.bin of=$img seek=${toString fipStart}
|
|
truncate -s ${toString ((rootPartEnd - rootPartStart + 1) * 512)} ./tmp.img
|
|
${btrfs-progs}/bin/mkfs.btrfs \
|
|
--label NIXOS_SD \
|
|
--uuid "44444444-4444-4444-8888-888888888888" \
|
|
./tmp.img
|
|
'';
|
|
# i give up on making this work in a nix derivation, just do the rest in a script (./image.sh)
|
|
# (i could do more in a vm but thats too slow, i could program a custom userspace utility but thats too annoying)
|
|
postVM = ''
|
|
# Truncate the file at the end of the last partition
|
|
img=./result.img
|
|
mkdir -p $out/boot
|
|
${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d $out/boot -g 0
|
|
cp ${rootfsImage} $out/rootfs.ext4
|
|
cp tmp.img $out/template.btrfs
|
|
cp $img $out/image.img
|
|
echo ${toString rootPartStart} > $out/metadata
|
|
echo ${toString rootPartEnd} >> $out/metadata
|
|
'';
|
|
memSize = "4G";
|
|
QEMU_OPTS = "-drive file=./tmp.img,format=raw,if=virtio,cache=unsafe,werror=report -rtc base=2000-01-01,clock=vm";
|
|
} ''
|
|
modprobe btrfs
|
|
mkdir -p /mnt
|
|
mount -t btrfs -o space_cache=v2 /dev/vda /mnt
|
|
btrfs filesystem resize max /mnt
|
|
btrfs subvolume create /mnt/@boot
|
|
btrfs subvolume create /mnt/@
|
|
btrfs subvolume create /mnt/@nix
|
|
chattr +C /mnt/@boot
|
|
'')
|