Synnefo » snf-image

#!/bin/bash

set -e

set -x

. @osdir@/common.sh

CACHE_FILE="$HELPER_DIR/cache.tar"

ARCH=amd64

EXTRA_PKGS="linux-image-amd64,e2fsprogs,ntfs-3g,xmlstarlet"

helper_img=$(mktemp $HELPER_DIR/image.XXXXXXXX)

dd if=/dev/zero of=$helper_img bs=1k count=400000

blockdev=$(losetup -sf $helper_img)

CLEANUP+=("losetup -d $blockdev")

format_disk0 $blockdev "extdump"

root_dev=$(map_disk0 $blockdev)-1

CLEANUP+=("unmap_disk0 $blockdev")

mkfs.ext3 $root_dev

TMPDIR=$(mktemp -d)

CLEANUP+=("rmdir $TMPDIR")

mount $root_dev $TMPDIR

CLEANUP+=("umount $root_dev")

if [  -f "$CACHE_FILE" ]; then

    tar xf "$CACHE_FILE" -C $TMPDIR

else

    debootstrap --arch "$ARCH" --include $EXTRA_PKGS --variant=minbase \

	    squeeze $TMPDIR

    # remove the downloaded debs, as they are no longer needed

    find "$TMPDIR/var/cache/apt/archives" -type f -name '*.deb' -print0 | \

        xargs -r0 rm -f

    TMP_CACHE=$(mktemp "${CACHE_FILE}.XXXXXX")

    tar cf "$TMP_CACHE" -C $TMPDIR .

    mv -f "$TMP_CACHE" "$CACHE_FILE"

fi

echo helper > $TMPDIR/etc/hostname

cat > $TMPDIR/etc/fstab <<EOF

# /etc/fstab: static file system information.

#

# <file system>   <mount point>   <type>  <options>       <dump>  <pass>

/dev/sda1         /               ext3    defaults        0       1

proc              /proc           proc    defaults        0       0

EOF

if [ ! -L "$TMPDIR/vmlinuz" -o ! -L "$TMPDIR/vmlinuz" ]; then

	log_error "vmlinuz or initrd.img link in root is missing."

	log_error "I don't know how to find a usable kernel/initrd pair."

	exit 1

fi

kernel=$(readlink -en $TMPDIR/vmlinuz)

initrd=$(readlink -en $TMPDIR/initrd.img)

echo "Moving $(basename $kernel) and $(basename $initrd) to $HELPER_DIR"

mv $kernel $initrd $HELPER_DIR

kernel=$(basename $kernel)

initrd=$(basename $initrd)

(cd $HELPER_DIR; ln -fs $kernel kernel; ln -fs $initrd initrd)

rm $TMPDIR/vmlinuz $TMPDIR/initrd.img

cleanup

mv $helper_img $HELPER_DIR/image

trap - EXIT

exit 0

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