#!/bin/bash

##########################################################################
# Copyright (c) 2010, ETH Zurich.
# All rights reserved.
#
# This file is distributed under the terms in the attached LICENSE file.
# If you do not find this file, copies can be found by writing to:
# ETH Zurich D-INFK, Universitaetstrasse 6, CH-8092 Zurich. Attn: Systems Group.
##########################################################################

# exit immediately on error
set -e

# grab arguments
SRCDIR="$1"
ARCHIVE="$2"
shift 2

TMPDIR=$(mktemp -d)

for src in $*; do
    # construct destination file name relative to archive dir
    # $SRCDIR/foo/bar/baz.txt -> skb/bar/baz.txt
    dst=skb/${src#$SRCDIR/*/}

    # ensure target directory exists
    mkdir -p $TMPDIR/$(dirname $dst)

    # copy to target and add to list
    cp $src $TMPDIR/$dst
    echo $dst >> $TMPDIR/files
done

# run cpio in the temp dir
cd $TMPDIR
cpio -o -H crc -O ramfs.cpio < files
cd "$OLDPWD"

# compress it
gzip $TMPDIR/ramfs.cpio

# move it to the right place
mv $TMPDIR/ramfs.cpio.gz $ARCHIVE

# clean up
rm -rf $TMPDIR