torch-pi-gen/export-noobs/prerun.sh

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#!/bin/bash -e
IMG_FILE="${STAGE_WORK_DIR}/${IMG_FILENAME}${IMG_SUFFIX}.img"
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NOOBS_DIR="${STAGE_WORK_DIR}/${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}"
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unmount_image "${IMG_FILE}"
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mkdir -p "${STAGE_WORK_DIR}"
cp "${WORK_DIR}/export-image/${IMG_FILENAME}${IMG_SUFFIX}.img" "${STAGE_WORK_DIR}/"
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rm -rf "${NOOBS_DIR}"
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PARTED_OUT=$(parted -sm "${IMG_FILE}" unit b print)
BOOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^1:' | cut -d':' -f 2 | tr -d B)
BOOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^1:' | cut -d':' -f 4 | tr -d B)
ROOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^2:' | cut -d':' -f 2 | tr -d B)
ROOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^2:' | cut -d':' -f 4 | tr -d B)
echo "Mounting BOOT_DEV..."
cnt=0
until BOOT_DEV=$(losetup --show -f -o "${BOOT_OFFSET}" --sizelimit "${BOOT_LENGTH}" "${IMG_FILE}"); do
if [ $cnt -lt 5 ]; then
cnt=$((cnt + 1))
echo "Error in losetup for BOOT_DEV. Retrying..."
sleep 5
else
echo "ERROR: losetup for BOOT_DEV failed; exiting"
exit 1
fi
done
echo "Mounting ROOT_DEV..."
cnt=0
until ROOT_DEV=$(losetup --show -f -o "${ROOT_OFFSET}" --sizelimit "${ROOT_LENGTH}" "${IMG_FILE}"); do
if [ $cnt -lt 5 ]; then
cnt=$((cnt + 1))
echo "Error in losetup for ROOT_DEV. Retrying..."
sleep 5
else
echo "ERROR: losetup for ROOT_DEV failed; exiting"
exit 1
fi
done
echo "/boot: offset $BOOT_OFFSET, length $BOOT_LENGTH"
echo "/: offset $ROOT_OFFSET, length $ROOT_LENGTH"
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mkdir -p "${STAGE_WORK_DIR}/rootfs"
mkdir -p "${NOOBS_DIR}"
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mount "$ROOT_DEV" "${STAGE_WORK_DIR}/rootfs"
mount "$BOOT_DEV" "${STAGE_WORK_DIR}/rootfs/boot"
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ln -sv "/lib/systemd/system/apply_noobs_os_config.service" "$ROOTFS_DIR/etc/systemd/system/multi-user.target.wants/apply_noobs_os_config.service"
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bsdtar --numeric-owner --format gnutar -C "${STAGE_WORK_DIR}/rootfs/boot" -cpf - . | xz -T0 > "${NOOBS_DIR}/boot.tar.xz"
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umount "${STAGE_WORK_DIR}/rootfs/boot"
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bsdtar --numeric-owner --format gnutar -C "${STAGE_WORK_DIR}/rootfs" --one-file-system -cpf - . | xz -T0 > "${NOOBS_DIR}/root.tar.xz"
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unmount_image "${IMG_FILE}"