#!/bin/bash

set -e

cd "$(dirname "$0")"

teile_params=(
  'Kanons/Er_ist_wie_ein_Baum'
  'Denn_er_hat_seinen_Engeln_'
  'Den_Tag_an_dem_wir_feiern_segne_Gott'
)

rm -f *.pre

for teil_params in "${teile_params[@]}"
do
  if [ -z "${teil_params%%'"'*}" ]; then
    continue
  fi
  teil="${teil_params%%:*}"
  params="${teil_params#${teil}}"
  params="${params#:}"
  (
    cd ../../${teil}
    sed -n '
      s/^\([^:]*%\|'"${teil##*/}"'\)\.pdf.*:\s*//
      T
      :a
        /\\$/ {
          N
          s/\\\n/ /
          ta
        }
      s/\n.*$//
      s/%/'"${teil##*/}"'/g
      p
    ' Makefile | \
      tr ' ' '\n' | \
      grep '\.pre$' | \
      xargs -r make ${params} "$@"
  )
done

{
  printf '\n\n'
  cat alles.ly
  printf '\n\n'
} | \
  while read -r line
  do
    if [[ "${line}" = '%LOOP%'* ]]
    then
      loopLines="${loopLines}
${line#%LOOP%}"
    else
      if [ -n "${loopLines}" ]
      then
        for teil_param in "${teile_params[@]}"
        do
          teil="${teil_param%%:*}"
          echo "${loopLines}" | \
            if [ -z ${teil%%'"'*} ]; then
              sed '
                s/\\include "[^"]*"/\\markup { '"${teil_param}"'" }/g
              '
            else
              cat
            fi | \
            sed "
              s|%TEIL%|${teil}|g
              s|%TEIL-BASE%|${teil##*/}|g
              /%IF \([^=%]\+\)!=\1%/d
              s|%IF [^=%]\+!=[^=%]\+%||g
              s|%IF \([^=%]*[^=!%]\)=\1%||g
              /%IF [^=%]\+=[^=%]\+%/d
            "
        done
        unset loopLines
      fi
      echo "${line}"
    fi
  done > alles.pre

lilypond alles.pre

#ps2pdf -sPAPERSIZE=a4 - empty.pdf </dev/null
#pdfunite empty.pdf alles.pdf alles_.pdf
#mv alles_.pdf alles.pdf