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hashbrowncipher/docker2squash.sh

Created May 5, 2019 07:53
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generates a squashfs from a docker image
Raw
docker2squash.sh
#!/usr/bin/fakeroot /bin/bash
set -o errexit
set -o nounset
set -o pipefail
OUTFILE=$2.squashfs
TMPDIR=$(mktemp -d -p .)
cleanup() {
rm -fr $TMPDIR
}
trap cleanup EXIT
CONTAINER=$(docker create $1)
docker export $CONTAINER | tar -C $TMPDIR -p -s --same-owner -xv
docker rm $CONTAINER
mksquashfs $TMPDIR $OUTFILE -info -processors 1 -noappend -comp xz -Xdict-size 100%
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