#!/bin/bash

# Bail out if there are any errors

set -e

# There's probably a way to do this in the Makefile, but I couldn't figure
# out how, so I'm doing it here.  This script just tars up all the files,
# excluding the demos that are not ready for release.

# This script expects to be called with the TWHOME directory as its first
# arg and the list of demo dirs as the rest.  Both are defined in the
# Makefile.

TWHOME=$1
shift
DEMO_DIRS=$@

# Returning 0 is true, and 1 is false, in the usual, paradoxical Unix way.

function member () {
    arg=$1
    shift;
    for elt in $@; do
	if [ $arg = $elt ]; then
	    return 0
	fi
    done
    return 1
}

echo "demo dirs are ${DEMO_DIRS}"

export TW_VERSION=tw-`cat VERSION`
echo "TW_VERSION is ${TW_VERSION}"
echo "TWHOME is ${TWHOME}"
cd ${TWHOME}
cd ..
if [ -d ${TW_VERSION} ]; then
    echo "Directory ${TW_VERSION} already exists; assuming a re-release"
    rm -rf ${TW_VERSION}
fi
echo "Copying ${TWHOME} to ${TW_VERSION}"
cp -ar ${TWHOME} ${TW_VERSION}
cd ${TW_VERSION}
make clean
for dir in demos/*; do
    if ! member $dir $DEMO_DIRS ; then
	# echo "$dir is NOT a demo dir"
	rm -rf $dir
    fi
done
cd ..
tarfile=${TW_VERSION}.tgz
if [ -e $tarfile ]; then
    echo "removing old tarball $tarfile"
    rm $tarfile
fi
echo "Creating tarball $tarfile"
tar --create -z --file=$tarfile ${TW_VERSION}