85 lines
3.5 KiB
Nix
85 lines
3.5 KiB
Nix
{ config, lib, pkgs, ... }:
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{
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imports = [
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<nixpkgs/nixos/modules/installer/cd-dvd/sd-image.nix>
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./configuration.nix
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];
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nixpkgs.overlays = [(import ./u-boot.nix)];
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sdImage.populateRootCommands = ''
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mkdir -p ./files/boot
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${config.boot.loader.generic-extlinux-compatible.populateCmd} -c ${config.system.build.toplevel} -d ./files/boot
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mkdir -p files/etc/nixos
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cp -r ${pkgs.nix-gitignore.gitignoreSource [] ./.}/* ./files/etc/nixos/
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'';
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system.build.sdImage = with lib;
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let
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rootfsImage = pkgs.callPackage ./make-btrfs-fs.nix ({
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inherit (config.sdImage) storePaths;
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compressImage = true;
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populateImageCommands = config.sdImage.populateRootCommands;
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volumeLabel = "bold-emmc";
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} // optionalAttrs (config.sdImage.rootPartitionUUID != null) {
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uuid = config.sdImage.rootPartitionUUID;
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});
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in pkgs.callPackage ({ stdenv, dosfstools, e2fsprogs,
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mtools, libfaketime, utillinux, bzip2, zstd }: stdenv.mkDerivation {
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name = config.sdImage.imageName;
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nativeBuildInputs = [ dosfstools e2fsprogs mtools libfaketime utillinux bzip2 zstd ];
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inherit (config.sdImage) compressImage;
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diskUUID = "A8ABB0FA-2FD7-4FB8-ABB0-2EEB7CD66AFA";
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loadUUID = "534078AF-3BB4-EC43-B6C7-828FB9A788C6";
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bootUUID = "95D89D52-CA00-42D6-883F-50F5720EF37E";
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rootUUID = "0340EA1D-C827-8048-B631-0C60D4478796";
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buildCommand = ''
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mkdir -p $out/nix-support $out/sd-image
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export img=$out/sd-image/${config.sdImage.imageName}
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echo "${pkgs.stdenv.buildPlatform.system}" > $out/nix-support/system
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if test -n "$compressImage"; then
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echo "file sd-image $img.bz2" >> $out/nix-support/hydra-build-products
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else
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echo "file sd-image $img" >> $out/nix-support/hydra-build-products
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fi
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echo "Decompressing rootfs image"
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zstd -d --no-progress "${rootfsImage}" -o ./root-fs.img
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# Create the image file sized to fit /boot/firmware and /, plus slack for the gap.
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rootSizeBlocks=$(du -B 512 --apparent-size ./root-fs.img | awk '{ print $1 }')
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# rootfs will be at offset 0x8000, so we'll need to account for that.
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# And add an additional 20mb slack at the end.
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imageSize=$((0x8000 + rootSizeBlocks * 512 + 20 * 1024 * 1024))
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truncate -s $imageSize $img
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sfdisk --no-reread --no-tell-kernel $img <<EOF
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label: gpt
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label-id: $diskUUID
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first-lba: 64
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start=64, size=8000, type=0FC63DAF-8483-4772-8E79-3D69D8477DE4, uuid=$loadUUID, name=loader1
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start=16384, size=8192, type=0FC63DAF-8483-4772-8E79-3D69D8477DE4, uuid=$bootUUID, name=loader2
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start=32768, type=B921B045-1DF0-41C3-AF44-4C6F280D3FAE, uuid=$rootUUID, name=boot, attrs=LegacyBIOSBootable
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EOF
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# Copy the rootfs into the SD image
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eval $(partx $img -o START,SECTORS --nr 3 --pairs)
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dd conv=notrunc if=./root-fs.img of=$img seek=$START count=$SECTORS
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# Copy u-boot into the SD image
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eval $(partx $img -o START,SECTORS --nr 2 --pairs)
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dd conv=notrunc if=${pkgs.ubootHelios64}/u-boot.itb of=$img seek=$START count=$SECTORS
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# Copy bootloader into the SD image
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eval $(partx $img -o START,SECTORS --nr 1 --pairs)
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dd conv=notrunc if=${pkgs.ubootHelios64}/idbloader.img of=$img seek=$START count=$SECTORS
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if test -n "$compressImage"; then
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zstd -v --no-progress $img
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fi
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'';
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}) {};
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}
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