build_latex.sh

#!/bin/bash

Red='\e[0;31m';
# reset color
RCol='\e[0m'

cleanUp(){
  # clean up
  unset counter
  unset PDFNAME
  unset BUILDOUT
  unset RELEASEOUT
  unset BASE
}

setup(){
  export PDFNAME=LePDF.pdf
  export BUILDOUT=./build
  export RELEASEOUT=./release
  export BASE=.
}


fail(){
  echo -e "${Red}$1${RCol}"
  cleanUp

  exit 1
}


buildPdf(){
  echo "Build document"
  # this run pdflatex until every lable is right or break the script
  export counter=0
  while true; do
     pdflatex -no-shell-escape -interaction=nonstopmode -output-directory=$BUILDOUT $BASE/main.tex > "$BUILDOUT/pdflatex.log"
     grep -q -i "LaTeX Warning: Label(s) may have changed." "$BUILDOUT/pdflatex.log" || break

    # this prevent the script from running endless in case of a Label error
    # http://tex.stackexchange.com/questions/198517/labels-may-have-changed-run-pdflatex#comment460773_198517
    # > BTW, it's possible that you never get a stable build, because a reference alternates between two sides.
    counter=$((counter+1))
    if [[ "$counter" -gt 20 ]]; then
      fail "Counter: $counter times reached Exiting loop!"
    fi
  done
}

movePDF(){
  # copy the file if pdflatex was successfull else show a error message
  if grep -q -i "error" "$BUILDOUT/pdflatex.log"; then
    fail "FAIL: pdflatex couldn't build the pdf documentation, you can check the log ${BUILDOUT}/pdflatex.log for more informations"
  else
    cp $BUILDOUT/main.pdf $RELEASEOUT/$PDFNAME
  fi
}


setup

buildPdf
movePDF

cleanUp