torch-pi-gen/export-image/prerun.sh
Claus F. Strasburger 667318116a Added Docker support (#40)
* Added Docker support

- replaced necessity for devicemapper (through kpartx) by using parted and
  losetup with offsets
- added Dockerfile
- added dependency for parted and grep
- added hints to README.md
- common: loop through unmounts, fix shellcheck warnings

* stage2: use debconf instead of console-setup patch. Fixes #41
2017-01-23 12:44:03 +00:00

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#!/bin/bash -e
IMG_FILE="${STAGE_WORK_DIR}/${IMG_DATE}-${IMG_NAME}${IMG_SUFFIX}.img"
unmount_image ${IMG_FILE}
rm -f ${IMG_FILE}
rm -rf ${ROOTFS_DIR}
mkdir -p ${ROOTFS_DIR}
BOOT_SIZE=$(du -sh ${EXPORT_ROOTFS_DIR}/boot -B M | cut -f 1 | tr -d M)
TOTAL_SIZE=$(du -sh ${EXPORT_ROOTFS_DIR} -B M | cut -f 1 | tr -d M)
IMG_SIZE=$(expr $BOOT_SIZE \* 2 \+ $TOTAL_SIZE \+ 512)M
fallocate -l ${IMG_SIZE} ${IMG_FILE}
fdisk ${IMG_FILE} > /dev/null 2>&1 <<EOF
o
n
8192
+`expr $BOOT_SIZE \* 3`M
p
t
c
n
8192
p
w
EOF
PARTED_OUT=$(parted -s ${IMG_FILE} unit b print)
BOOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^ 1'| xargs echo -n \
| cut -d" " -f 2 | tr -d B)
BOOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^ 1'| xargs echo -n \
| cut -d" " -f 4 | tr -d B)
ROOT_OFFSET=$(echo "$PARTED_OUT" | grep -e '^ 2'| xargs echo -n \
| cut -d" " -f 2 | tr -d B)
ROOT_LENGTH=$(echo "$PARTED_OUT" | grep -e '^ 2'| xargs echo -n \
| cut -d" " -f 4 | tr -d B)
BOOT_DEV=$(losetup --show -f -o ${BOOT_OFFSET} --sizelimit ${BOOT_LENGTH} ${IMG_FILE})
ROOT_DEV=$(losetup --show -f -o ${ROOT_OFFSET} --sizelimit ${ROOT_LENGTH} ${IMG_FILE})
echo "/boot: offset $BOOT_OFFSET, length $BOOT_LENGTH"
echo "/: offset $ROOT_OFFSET, length $ROOT_LENGTH"
mkdosfs -n boot -S 512 -s 16 -v $BOOT_DEV > /dev/null
mkfs.ext4 -O ^huge_file $ROOT_DEV > /dev/null
mount -v $ROOT_DEV ${ROOTFS_DIR} -t ext4
mkdir -p ${ROOTFS_DIR}/boot
mount -v $BOOT_DEV ${ROOTFS_DIR}/boot -t vfat
rsync -aHAXx ${EXPORT_ROOTFS_DIR}/ ${ROOTFS_DIR}/