#! /bin/bash
# Last edited on 2003-11-22 15:31:00 by stolfi

cmd="${0##*/}"
usage="${cmd} PKG VERSION EXPORTDIR"

# Makes a "tar" archive named "{PKG}-{VERSION}.tgz" containing all
# files of "{PKG}/{VERSION}" that are listed in
# "{PKG}/{VERSION}/.export". Then moves that tarball to directory
# "{EXPORTDIR}".
# 
# All file names in the archive will be prefixed with
# "{PKGTAIL}/{VERSION}/" where {PKGTAIL} is the last component of
# {PKG}.

if [ $# -ne 3 ]; then
  echo "usage: ${usage}"; exit 1
fi

pkg="$1"; shift;
version="$1"; shift;
exdir="$1"; shift;

pvdir="${pkg}/${version}"
tarball="${pkg}-${version}.tgz"

filelist="${pvdir}/.export"
fileprefix="${pkg##*/}/${version}"

if [ ! -d ${pvdir} ]; then
  echo "${pvdir} missing or not a directory"; exit 1
fi

if [ ! -r ${filelist} ]; then
  echo "${filelist} missing or not a directory"; exit 1
fi

if [ ! -d ${exdir} ]; then
  echo "${exdir} missing or not a directory"; exit 1
fi

tar -cvzf ${tarball} `cat ${filelist} | sed -e "s;^;${fileprefix}/;"`
mv -v ${tarball} ${exdir}