#!/bin/sh

set -e

case $# in
3) CVSMODULE=$1
   TAGOPT=-r
   CVSTAG=$2
   TARFILE=$3 ;;
4) CVSMODULE=$1
   TAGOPT=$2
   CVSTAG=$3
   TARFILE=$4 ;;
*) echo "usage: cvstotgz cvs-module ([-r] cvs-tag | -D date) cvs-tag tar-file"
   echo "  e.g. cvstotgz frobble V2-1 frobble-2.1.tgz"
   exit 1
   ;;
esac

TMPDIR=/tmp

STEM=`basename $TARFILE .tgz`
EXPORTDIR="${TMPDIR}/${STEM}"
TMPTAR="${TMPDIR}/cvstotgz.$$.tgz"

pushd $TMPDIR
cvs export $TAGOPT $CVSTAG -d $STEM $CVSMODULE
tar czf $TMPTAR $STEM
rm -r $STEM
popd

mv $TMPTAR $TARFILE