#!/bin/bash

# A wrapper around cpanspec
#  
# (C) 2010 by Stephan Kulow <coolo@suse.de>
#  
# This program is free software; you can redistribute it and/or  
# modify it under the terms of the GNU General Public License  
# as published by the Free Software Foundation; either version 2  
# of the License, or (at your option) any later version.  
# See http://www.gnu.org/licenses/gpl-2.0.html for full license text.  

#defaults
SOURCE=""
FILTER_REQUIRES=""
FILTER_PROVIDES=""
ADD_REQUIRES=""
ADD_PROVIDES=""
ADD_BUILDREQUIRES=""


while test $# -gt 0; do
  case $1 in
    *-source)
      if test -n "$SOURCE"; then
        echo Source is defined twiced.
	exit 1
      fi
      SOURCE="$2"
      shift
    ;;
   *-filter-requires)
      FILTER_REQUIRES="$2"
      shift
      ;;
   *-filter-provides)
      FILTER_PROVIDES="$2"
      shift
      ;;
   *-add-requires)
      ADD_REQUIRES="$2"
      shift
      ;;
   *-add-provides)
      ADD_PROVIDES="$2"
      shift
      ;;
   *-add-buildrequires)
      ADD_BUILDREQUIRES="$2"
      shift
      ;;
    *-outdir)
      MYOUTDIR="$2"
      shift
    ;;
    *)
      echo Unknown parameter $1.
      echo 'Usage: cpanspec --source $SOURCE --outdir $OUT'
      exit 1
    ;;
  esac
  shift
done

if [ -z "$SOURCE" ]; then
   SOURCE="*.tar.bz2"
fi
if [ -z "$MYOUTDIR" ]; then
  echo "ERROR: no output directory is given via --outdir parameter!"
  exit 1
fi

set -e
FILE=`readlink -f $SOURCE`
if test -z "$FILE"; then
  echo There is no unique filename.
fi
BASENAME=`basename $FILE | sed -e 's,.*:\([^:]*\)$,\1,'`

TMPOUT=`mktemp -d`
ln -s $FILE $TMPOUT/$BASENAME
cdir=$PWD
cd $TMPOUT
call=cpanspec
if test -n "$FILTER_REQUIRES"; then
 call="$call --filter-requires '$FILTER_REQUIRES'"
fi
if test -n "$FILTER_PROVIDES"; then
 call="$call --filter-provides '$FILTER_PROVIDES'"
fi
if test -n "$ADD_REQUIRES"; then
 call="$call --add-requires '$ADD_REQUIRES'"
fi
if test -n "$ADD_PROVIDES"; then
 call="$call --add-provides '$ADD_PROVIDES'"
fi
if test -n "$ADD_BUILDREQUIRES"; then
 call="$call --add-buildrequires '$ADD_BUILDREQUIRES'"
fi
$call -f $BASENAME
cd $cdir

# do not copy stub
rm -f $TMPOUT/*.changes
rm $TMPOUT/$BASENAME

# copy the rest
mv $TMPOUT/* $MYOUTDIR

exit 0