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nvidia-jetpack: move pre-flash commands into writeShellApplication #1740

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Merged
brianmcgillion merged 1 commit into from
Feb 11, 2026
Merged

nvidia-jetpack: move pre-flash commands into writeShellApplication #1740

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104 changes: 55 additions & 49 deletions modules/reference/hardware/jetpack/nvidia-jetson-orin/partition-template.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -128,65 +128,71 @@ let
);

# preFlashCommands: Extract images from sdImage and patch flash.xml
preFlashCommands = ''
echo "============================================================"
echo "Ghaf flash script for NVIDIA Jetson"
echo "============================================================"
echo "Version: ${config.ghaf.version}"
echo "SoM: ${config.hardware.nvidia-jetpack.som}"
echo "Carrier board: ${config.hardware.nvidia-jetpack.carrierBoard}"
echo "============================================================"
echo ""
mkdir -pv "$WORKDIR/bootloader"
rm -fv "$WORKDIR/bootloader/esp.img"
''
+ lib.optionalString (!cfg.flashScriptOverrides.onlyQSPI) ''
preFlashScript = pkgs.writeShellApplication {
name = "pre-flash-commands";
runtimeInputs = [
pkgs.pkgsBuildBuild.zstd
pkgs.pkgsBuildBuild.gnused
];
text = ''
echo "============================================================"
echo "Ghaf flash script for NVIDIA Jetson"
echo "============================================================"
echo "Version: ${config.ghaf.version}"
echo "SoM: ${config.hardware.nvidia-jetpack.som}"
echo "Carrier board: ${config.hardware.nvidia-jetpack.carrierBoard}"
echo "============================================================"
echo ""
WORKDIR=$PWD
mkdir -pv "$WORKDIR/bootloader"
rm -fv "$WORKDIR/bootloader/esp.img"

# Read partition offsets and sizes from sdImage metadata
ESP_OFFSET=$(cat "${images}/esp.offset")
ESP_SIZE=$(cat "${images}/esp.size")
ROOT_OFFSET=$(cat "${images}/root.offset")
ROOT_SIZE=$(cat "${images}/root.size")
${lib.optionalString (!cfg.flashScriptOverrides.onlyQSPI) ''
# Read partition offsets and sizes from sdImage metadata
ESP_OFFSET=$(cat "${images}/esp.offset")
ESP_SIZE=$(cat "${images}/esp.size")
ROOT_OFFSET=$(cat "${images}/root.offset")
ROOT_SIZE=$(cat "${images}/root.size")

img="${images}/sd-image/${config.image.fileName}"
echo "Source image: $img"
echo "ESP: offset=$ESP_OFFSET sectors, size=$ESP_SIZE sectors"
echo "Root: offset=$ROOT_OFFSET sectors, size=$ROOT_SIZE sectors"
echo ""
img="${images}/sd-image/${config.image.fileName}"
echo "Source image: $img"
echo "ESP: offset=$ESP_OFFSET sectors, size=$ESP_SIZE sectors"
echo "Root: offset=$ROOT_OFFSET sectors, size=$ROOT_SIZE sectors"
echo ""

echo "Extracting ESP partition..."
dd if=<("${pkgs.pkgsBuildBuild.zstd}/bin/pzstd" -d "$img" -c) \
of="$WORKDIR/bootloader/esp.img" \
bs=512 iseek="$ESP_OFFSET" count="$ESP_SIZE" status=progress
echo "Extracting ESP partition..."
dd if=<(pzstd -d "$img" -c) \
of="$WORKDIR/bootloader/esp.img" \
bs=512 iseek="$ESP_OFFSET" count="$ESP_SIZE" status=progress

echo "Extracting root partition..."
dd if=<("${pkgs.pkgsBuildBuild.zstd}/bin/pzstd" -d "$img" -c) \
of="$WORKDIR/bootloader/root.img" \
bs=512 iseek="$ROOT_OFFSET" count="$ROOT_SIZE" status=progress
echo "Extracting root partition..."
dd if=<(pzstd -d "$img" -c) \
of="$WORKDIR/bootloader/root.img" \
bs=512 iseek="$ROOT_OFFSET" count="$ROOT_SIZE" status=progress

echo ""
echo "Patching flash.xml with image paths and sizes..."
"${pkgs.pkgsBuildBuild.gnused}/bin/sed" -i \
-e "s#bootloader/esp.img#$WORKDIR/bootloader/esp.img#" \
-e "s#root.img#$WORKDIR/bootloader/root.img#" \
-e "s#ESP_SIZE#$((ESP_SIZE * 512))#" \
-e "s#ROOT_SIZE#$((ROOT_SIZE * 512))#" \
flash.xml
''
+ lib.optionalString cfg.flashScriptOverrides.onlyQSPI ''
echo ""
echo "Patching flash.xml with image paths and sizes..."
sed -i \
-e "s#bootloader/esp.img#$WORKDIR/bootloader/esp.img#" \
-e "s#root.img#$WORKDIR/bootloader/root.img#" \
-e "s#ESP_SIZE#$((ESP_SIZE * 512))#" \
-e "s#ROOT_SIZE#$((ROOT_SIZE * 512))#" \
flash.xml
''}

echo "QSPI-only mode: skipping ESP and root partition extraction."
''
+ ''
${lib.optionalString cfg.flashScriptOverrides.onlyQSPI ''
echo "QSPI-only mode: skipping ESP and root partition extraction."
''}

echo ""
echo "Ready to flash!"
echo "============================================================"
'';
echo ""
echo "Ready to flash!"
echo "============================================================"
'';
};
in
{
config = lib.mkIf cfg.enable {
hardware.nvidia-jetpack.flashScriptOverrides.partitionTemplate = partitionTemplate;
hardware.nvidia-jetpack.flashScriptOverrides.preFlashCommands = preFlashCommands;
hardware.nvidia-jetpack.flashScriptOverrides.preFlashCommands = "${preFlashScript}/bin/pre-flash-commands";
};
}
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