classify () {
   local pkg_dir="$1"

   if [ -f $pkg_dir/centos/srpm_path ]; then
      # echo "srpm + patch: $(basename $(cat $pkg_dir/centos/srpm_path | head -n 1))"
      echo "srpm + patches"
   elif [ -f $pkg_dir/centos/*.spec ]; then
      if [ -f $pkg_dir/centos/build_srpm ]; then
         # echo "spec + custom_script: $pkg_dir"         
         echo "spec + custom_script"         
      elif [ -f $pkg_dir/centos/build_srpm.data ]; then
         local ALLOW_EMPTY_RPM=""
         local COPY_LIST=""
         local SRC_DIR=""
         local PKG_BASE="$pkg_dir"
         source $pkg_dir/centos/build_srpm.data

         if [ "" != "$SRC_DIR" ] ; then
            # echo "spec + src_dir: $pkg_dir/$SRC_DIR"
            echo "spec + src_dir"
         elif [ "" != "$COPY_LIST" ] ; then
            local TARBALL=""
            for f in $COPY_LIST; do
               case $f in
                  *.tar.gz)  TARBALL=$f ;;
                  *.tgz)     TARBALL=$f ;;
                  *.tar.bz2) TARBALL=$f ;;
                  *.tar.xz)  TARBALL=$f ;;
                  *.tar)     TARBALL=$f ;;
               esac
            done
            if [ "" != "$TARBALL" ]; then
               # echo "spec + tarball: $pkg_dir/$TARBALL"
               echo "spec + tarball"
            else
               # echo "spec + files: $pkg_dir"
               echo "spec + files"
            fi
         elif [ "$ALLOW_EMPTY_RPM" == "true" ] ; then
            # echo "spec + empty: $pkg_dir"
            echo "spec + empty"
         else
            # echo "spec + build_srpm.data + unknown: $pkg_dir"
            # cat $pkg_dir/centos/build_srpm.data
            echo "spec + build_srpm.data + unknown"
         fi
      else
         # echo "spec + unknown: $pkg_dir"
         echo "spec + unknown"
      fi
   else
      # echo "unknown: $pkg_dir"
      echo "unknown"
   fi
}