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nixos/sd-image: Make it more similar to iso-image.nix

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- Add `imageName` and `imageBaseName` options similar to the `isoName`
  and `isoBaseName` options
- Make the filename of the iso match what iso-image.nix does
- Generate a nix-support/hydra-build-products like iso-image.nix does
This commit is contained in:
Tuomas Tynkkynen 2018-03-31 20:27:45 +03:00
parent e410315f18
commit 4c21180a13
1 changed files with 27 additions and 7 deletions
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34
nixos/modules/installer/cd-dvd/sd-image.nix
View file

@ -20,6 +20,20 @@ let
in
{
options.sdImage = {
imageName = mkOption {
default = "${config.sdImage.imageBaseName}-${config.system.nixos.label}-${pkgs.stdenv.system}.img";
description = ''
Name of the generated image file.
'';
};
imageBaseName = mkOption {
default = "nixos-sd-image";
description = ''
Prefix of the name of the generated image file.
'';
};
storePaths = mkOption {
type = with types; listOf package;
example = literalExample "[ pkgs.stdenv ]";
@ -61,19 +75,25 @@ in
sdImage.storePaths = [ config.system.build.toplevel ];
system.build.sdImage = pkgs.stdenv.mkDerivation {
name = "sd-image-${pkgs.stdenv.system}.img";
name = config.sdImage.imageName;
buildInputs = with pkgs; [ dosfstools e2fsprogs mtools libfaketime utillinux ];
buildCommand = ''
mkdir -p $out/nix-support $out/sd-image
export img=$out/sd-image/${config.sdImage.imageName}
echo "${pkgs.stdenv.system}" > $out/nix-support/system
echo "file sd-image $img" >> $out/nix-support/hydra-build-products
# Create the image file sized to fit /boot and /, plus 20M of slack
rootSizeBlocks=$(du -B 512 --apparent-size ${rootfsImage} | awk '{ print $1 }')
bootSizeBlocks=$((${toString config.sdImage.bootSize} * 1024 * 1024 / 512))
imageSize=$((rootSizeBlocks * 512 + bootSizeBlocks * 512 + 20 * 1024 * 1024))
truncate -s $imageSize $out
truncate -s $imageSize $img
# type=b is 'W95 FAT32', type=83 is 'Linux'.
sfdisk $out <<EOF
sfdisk $img <<EOF
label: dos
label-id: 0x2178694e
@ -82,11 +102,11 @@ in
EOF
# Copy the rootfs into the SD image
eval $(partx $out -o START,SECTORS --nr 2 --pairs)
dd conv=notrunc if=${rootfsImage} of=$out seek=$START count=$SECTORS
eval $(partx $img -o START,SECTORS --nr 2 --pairs)
dd conv=notrunc if=${rootfsImage} of=$img seek=$START count=$SECTORS
# Create a FAT32 /boot partition of suitable size into bootpart.img
eval $(partx $out -o START,SECTORS --nr 1 --pairs)
eval $(partx $img -o START,SECTORS --nr 1 --pairs)
truncate -s $((SECTORS * 512)) bootpart.img
faketime "1970-01-01 00:00:00" mkfs.vfat -i 0x2178694e -n NIXOS_BOOT bootpart.img
@ -96,7 +116,7 @@ in
# Copy the populated /boot into the SD image
(cd boot; mcopy -bpsvm -i ../bootpart.img ./* ::)
dd conv=notrunc if=bootpart.img of=$out seek=$START count=$SECTORS
dd conv=notrunc if=bootpart.img of=$img seek=$START count=$SECTORS
'';
};