burrow-pi-img/export-noobs/prerun.sh
T. Joseph Carter 7969dfd5a1 export-noobs/prerun.sh: Use nested mountpoint
While it seems elegant and intuitive to use separate bootfs and rootfs
mountpoints for compressing the partitions, doing so violates a
precondition of unmount_image that they be mounted as a tree.  This
causes the image to not be properly unmounted and detached.  A better
solution might be to pack up the previous stage's chroot directory, but
that rework can wait for the time being.

scripts/common.sh: Output device name correctly

A micplaced ) in unmount_image caused the loop device to be incorrectly
identified, resulting in a fair bit of chaos trying to unmount other
filesystems on /dev/mapper devices.  Such as / on a LUKS-encrypted
installation, for example.  The unmount will fail as it should and
build.sh will abort the build without any cleanup.  Best to avoid that.

These changes close RPi-Distro/pi-gen#19
2016-09-17 11:32:48 -07:00

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#!/bin/bash -e
IMG_FILE="${STAGE_WORK_DIR}/${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}.img"
NOOBS_DIR="${STAGE_WORK_DIR}/${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}"
unmount_image ${IMG_FILE}
mkdir -p ${STAGE_WORK_DIR}
cp ${WORK_DIR}/export-image/${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}.img ${STAGE_WORK_DIR}/
rm -rf ${STAGE_WORK_DIR}/${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}
LOOP_DEV=`kpartx -asv ${IMG_FILE} | grep -E -o -m1 'loop[[:digit:]]+' | head -n 1`
BOOT_DEV=/dev/mapper/${LOOP_DEV}p1
ROOT_DEV=/dev/mapper/${LOOP_DEV}p2
mkdir -p ${STAGE_WORK_DIR}/rootfs
mkdir -p ${NOOBS_DIR}
mount $ROOT_DEV ${STAGE_WORK_DIR}/rootfs
mount $BOOT_DEV ${STAGE_WORK_DIR}/rootfs/boot
tar -I pxz -C ${STAGE_WORK_DIR}/rootfs/boot -cpf ${NOOBS_DIR}/boot.tar.xz .
tar -I pxz -C ${STAGE_WORK_DIR}/rootfs --one-file-system -cpf ${NOOBS_DIR}/root.tar.xz .
unmount_image ${IMG_FILE}