#!/bin/sh

BASEDIR=$HOME/src/clisp
TARGET=/var/www/src

DEBUG=${DEBUG:-0}
package=$1

canbuild=0
dosign=1
setversion=0
tarversion=0
dodebug ()
{
  if [ $DEBUG = 1 ]
  then
    echo "DEBUG: $*"
  fi
}

tarname ()
{
  if [ $tarversion = 0 ]
  then
    echo $package.tar.gz
  else
    echo $package-$version.tar.gz
  fi
}

printhelp ()
{
  echo "$0: build an ASDF package" 
  echo "  options:"
  echo "  -v <version>	Use <version> as the version number"
  echo "  -s 		Don't sign the resulting package"
  echo "  -t            Tarball has version number"
  echo "Usage: $0 [-s] [-v <version>] <package>"
}

while [ $(echo ${1:-x} | cut -c1) = "-" ]
do
  case $1 in
    -v) version=$2;
        setversion=1
	shift 2
	;;
    -s) dosign=0 ; shift ;;
    -t) tarversion=1; shift ;;
    -[h?]) printhelp ; exit 0 ;;
    *) echo "Unknown option, $1"; printhelp; exit 1 ;; 
  esac
done

package=$1

if [ ! -d $BASEDIR/$package ]
then
  echo "No suitable source directory found for $package"
  echo
  printhelp
  exit 2
fi

cd $BASEDIR/$package

if [ -r .filelist ]
then
  dodebug "Found file list"
  canbuild=1
fi

dodebug "canbuild is $canbuild"

if [ $setversion = 1 ]
then
  dodebug "Forcing version"
  echo $version > .version
fi

if [ -r .version ]
then
  dodebug "Version found"
  canbuild=$(( $canbuild + 2 ))
  version=$(cat .version)
fi

dodebug "canbuild is $canbuild"

if [ $canbuild != 3 ]
then
  echo "Either the file list (in .filelist) or the version (in .version)"
  echo "is missing, aborting packaging."
  exit 3
fi

dumpdir="${package}_${version}"

dodebug "dumpdir is $dumpdir"

files=$(sed -e "s%^%$dumpdir/%" .filelist)

cd $BASEDIR
if [ ! -d $dumpdir ]
then
  ln -s $package $dumpdir
fi

dodebug "files is $files"

chmod 644 $files
tar czf $TARGET/$(tarname) $files

rm $dumpdir

if [ $dosign = 1 ]
then
  cd $TARGET
  gpg -sa $(tarname)
fi

if [ $tarversion = 1 ]
then
  cd $TARGET
  tarball=$(tarname)
  tarversion=0
  plain=$(tarname)
  rm -f $plain
  rm -f ${plain}.asc
  ln -s $tarball $plain
  if [ $dosign = 1 ]
  then
    ln -s ${tarball}.asc ${plain}.asc
  fi
fi