#!/bin/bash

set -e

cd "$(dirname "$0")"

teile=(
  Die_beste_Zeit_im_Jahr_ist_mein
  Denn_er_hat_seinen_Engeln_
  Gott_hat_mir_laengst_einen_Engel_gesandt
  Befiehl_dem_Herren_deine_Wege
  Tanzen_und_Springen
  Aennchen_von_Tharau
  Schoen_ist_die_Erde
  Fuellt_die_Kruege_mit_Wasser
  Ich_sing_dir_mein_Lied
  Hoere_nun_Herr_die_Bitten
  Bleib_bei_mir_Herr
  Abendruhe
  Viele_verachten_die_edele_Musik
)

rm -f *.pre

for teil in "${teile[@]}"
do
  (
    cd ../../${teil}
    sed -n '
      s/^[^:]*%\.pdf.*:\s*//
      T
      s/%/'"${teil##*/}"'/g
      p
    ' Makefile | \
      tr ' ' '\n' | \
      grep '\.pre$' | \
      xargs -r make SPRACHEN_REGEX=/textSII/d "$@"
  )
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 in "${teile[@]}"
        do
          echo "${loopLines}" | \
            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