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Merge pull request #151633 from wucke13/sd-image-experiment

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honor `sdImage.compressImage` also in the build process
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Lassulus 2022-06-22 14:48:21 +02:00 committed by GitHub
parent 7c8eebb939 121e2f7e15
commit 773cbfbd28
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2 changed files with 19 additions and 5 deletions
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9
nixos/lib/make-ext4-fs.nix
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@ -78,6 +78,15 @@ pkgs.stdenv.mkDerivation {
# get rid of the unnecessary slack here--but see
# https://github.com/NixOS/nixpkgs/issues/125121 for caveats.
# shrink to fit
resize2fs -M $img
# Add 16 MebiByte to the current_size
new_size=$(dumpe2fs -h $img | awk -F: \
'/Block count/{count=$2} /Block size/{size=$2} END{print (count*size+16*2**20)/size}')
resize2fs $img $new_size
if [ ${builtins.toString compressImage} ]; then
echo "Compressing image"
zstd -v --no-progress ./$img -o $out

15
nixos/modules/installer/sd-card/sd-image.nix
View file

@ -18,7 +18,7 @@ with lib;
let
rootfsImage = pkgs.callPackage ../../../lib/make-ext4-fs.nix ({
inherit (config.sdImage) storePaths;
compressImage = true;
compressImage = config.sdImage.compressImage;
populateImageCommands = config.sdImage.populateRootCommands;
volumeLabel = "NIXOS_SD";
} // optionalAttrs (config.sdImage.rootPartitionUUID != null) {
@ -174,7 +174,8 @@ in
mtools, libfaketime, util-linux, zstd }: stdenv.mkDerivation {
name = config.sdImage.imageName;
nativeBuildInputs = [ dosfstools e2fsprogs mtools libfaketime util-linux zstd ];
nativeBuildInputs = [ dosfstools e2fsprogs libfaketime mtools util-linux ]
++ lib.optional config.sdImage.compressImage zstd;
inherit (config.sdImage) imageName compressImage;
@ -189,14 +190,18 @@ in
echo "file sd-image $img" >> $out/nix-support/hydra-build-products
fi
root_fs=${rootfsImage}
${lib.optionalString config.sdImage.compressImage ''
root_fs=./root-fs.img
echo "Decompressing rootfs image"
zstd -d --no-progress "${rootfsImage}" -o ./root-fs.img
zstd -d --no-progress "${rootfsImage}" -o $root_fs
''}
# Gap in front of the first partition, in MiB
gap=${toString config.sdImage.firmwarePartitionOffset}
# Create the image file sized to fit /boot/firmware and /, plus slack for the gap.
rootSizeBlocks=$(du -B 512 --apparent-size ./root-fs.img | awk '{ print $1 }')
rootSizeBlocks=$(du -B 512 --apparent-size $root_fs | awk '{ print $1 }')
firmwareSizeBlocks=$((${toString config.sdImage.firmwareSize} * 1024 * 1024 / 512))
imageSize=$((rootSizeBlocks * 512 + firmwareSizeBlocks * 512 + gap * 1024 * 1024))
truncate -s $imageSize $img
@ -214,7 +219,7 @@ in
# Copy the rootfs into the SD image
eval $(partx $img -o START,SECTORS --nr 2 --pairs)
dd conv=notrunc if=./root-fs.img of=$img seek=$START count=$SECTORS
dd conv=notrunc if=$root_fs of=$img seek=$START count=$SECTORS
# Create a FAT32 /boot/firmware partition of suitable size into firmware_part.img
eval $(partx $img -o START,SECTORS --nr 1 --pairs)