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| | # SPDX-License-Identifier: MIT
# SPDX-FileCopyrightText: 2021 Alyssa Ross <hi@alyssa.is>
{ pkgs ? import <nixpkgs> {} }: with pkgs;
let
inherit (builtins) head match storeDir;
inherit (pkgs.lib) removePrefix;
inherit (nixos ./configuration.nix) config;
image = import ../host/initramfs/live.nix { inherit pkgs; };
grub = grub2_efi;
grubCfg = substituteAll {
src = ./grub.cfg.in;
linux = removePrefix storeDir "${config.boot.kernelPackages.kernel}/${config.system.boot.loader.kernelFile}";
initrd = removePrefix storeDir "${config.system.build.initialRamdisk}/${config.system.boot.loader.initrdFile}";
kernelParams = toString ([
"init=${config.system.build.toplevel}/init"
] ++ config.boot.kernelParams);
};
installer = runCommand "installer.img" {
nativeBuildInputs = [ squashfs-tools-ng ];
} ''
sed 's,^${storeDir}/,,' ${writeReferencesToFile config.system.build.toplevel} |
tar -C ${storeDir} -c --verbatim-files-from -T - \
--owner 0 --group 0 | tar2sqfs $out
'';
storeDev = config.fileSystems."/nix/store".device;
installerUuid = head (match "/dev/disk/by-partuuid/(.*)" storeDev);
eosimages = vmTools.runInLinuxVM (runCommand "eosimages.img" {
nativeBuildInputs = [ exfatprogs kmod util-linux ];
} ''
truncate -s 4G "$out"
mkfs.exfat -L eosimages "$out"
mkdir /mnt
modprobe loop
mount "$out" /mnt
name=Spectrum-0.0-x86_64-generic.0.Live.img
cp ${image} /mnt/$name
sha256sum /mnt/$name > /mnt/$name.sha256
umount /mnt
'');
in
vmTools.runInLinuxVM (runCommand "spectrum-installer" {
nativeBuildInputs = [ dosfstools grub jq kmod util-linux systemdMinimal ];
} ''
blockSize() {
wc -c "$1" | awk '{printf "%d\n", ($1 + 511) / 512}'
}
fillPartition() {
read start size < <(sfdisk -J "$1" | jq -r --argjson index "$2" \
'.partitiontable.partitions[$index] | "\(.start) \(.size)"')
dd if="$3" of="$1" seek="$start" count="$size" conv=notrunc
}
efiSize=40000
installerSize="$(blockSize ${installer})"
eosimagesSize="$(blockSize ${eosimages})"
truncate -s $(((3 * 2048 + $efiSize + $installerSize + $eosimagesSize) * 512)) $out
sfdisk $out <<EOF
label: gpt
size=$efiSize, type=U
size=$installerSize, type=L, uuid=${installerUuid}
size=$eosimagesSize, type=56a3bbc3-aefa-43d9-a64d-7b3fd59bbc4e
EOF
fillPartition $out 1 ${installer}
fillPartition $out 2 ${eosimages}
modprobe loop
loop="$(losetup -P --show -f $out)"
mkfs.vfat "$loop"p1
mkdir /mnt
mount "$loop"p1 /mnt
grub-install --target ${grub.grubTarget} --removable \
--boot-directory /mnt --efi-directory /mnt "$loop"
cp ${grubCfg} /mnt/grub/grub.cfg
umount /mnt
'')
|