#!/bin/bash
#
# Syntax:  mktex [-h] [-s] [-m max_extra_runs] [-d dir1:dir2:...] [filename [...]]
#
# Purpose: Processes Latex files that use bibliography files. mktex first runs
#          by latex, followed by bibtex and/or makeindex, and followed by latex
#          as many times as necessary to resolve all references (with a maximum
#          of 5 times extra after the first latex-bibtex/makeindex-latex cycle;
#          use the -m flag to override this setting).
#          If no file is specified the file ~/bib/bib.tex is processed.
#          Use the -s option to reduce the intermediate output.
#          Use the -m option to set the maximum number of extra runs to a 
#          different value than the default one.
#          Use the -d flag to specify extra directories to be prepended to
#          TEXINPUTS, BIBINPUTS, and BSTINPUTS.
#          The -h flag shows the help info for this command.

# Created: Apr 22, 1993       by Bart De Schutter
# Last revised: Apr 12, 2012  by Bart De Schutter
#
# See http://www.deschutter.info/util/scripts.html for the latest version of
# this script.

# Status: public
# Category: latex

#
# Process options.
#
latex_option=""
bibtex_option=""
batch_mode=0
max_extra_runs=5
extra_dirs=""
while getopts :hsm:d: option
do
   case "$option" in
      h) sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
         exit 1
         ;;
      s) latex_option="-interaction=batchmode"
         bibtex_option="-terse"
         batch_mode=1
         ;;
      m) max_extra_runs=${OPTARG}
         ;;
      d) extra_dirs=${OPTARG}
         ;;
      :) echo >&2
         echo >&2 "Option -$OPTARG requires an argument."
         echo >&2
         sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
         echo >&2
         exit 1
         ;;
     \?) echo >&2
         echo >&2 "Unknown option: $OPTARG"
         echo >&2
         sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
         exit 1
         ;;
   esac
done
shift $(($OPTIND-1))

if [ -n "${extra_dirs}" ]
then
   TEXINPUTS="${extra_dirs}:$TEXINPUTS"
   BSTINPUTS="${extra_dirs}:$BSTINPUTS"
   BIBINPUTS="${extra_dirs}:$BIBINPUTS"
fi

#
#  Determine files to be processed.
#
if [ $# -eq 0 ];
then 

   latex $latex_option ~/bib/bib.tex
   if [ $? -eq 0 ];
   then
      bibtex $bibtex_option bib
      latex $latex_option ~/bib/bib.tex
   fi

else
   for fname in "$@"
   do
      #
      #  Run latex and bibtex as many times as required
      #  (subject to max_extra_runs setting).
      #
   
      n_extra_runs=$max_extra_runs
      file="${fname%.tex}"
      texfile="${file}.tex"
      file="${file##*/}"                    # strip leading path
                                            # to get filename in work dir
      latex $latex_option "$texfile"
      result=$?
      if [ $result -eq 0 ];
      then
         grep '\\printindex' "$texfile" | grep -v '^[ \t]*%' >/dev/null 2>&1 
         # Note: We assume that \printindex command is included in
         #       main file.
         #       For complete generality we should recursively check
         #       all tex files.
         #       Quick fix: just put \printindex in the main
         #       file after \end{document}
         if [ $? -eq 0 ];
         then
            makeindex "$file"
         fi
         grep '^\\bibdata' "${file}.aux" >/dev/null 2>&1  
         #
         # Note: We assume that \bibliography command is included in
         #       main file (so \include{references} would give problems).
         #       Quick fix: use \input{references} instead.
         #       For complete generality we should recursively check all
         #       aux files.
         #
         if [ $? -eq 0 ];
         then
            bibtex $bibtex_option "$file"
         fi
         latex $latex_option "$texfile"
         result=$?
         cont=1
         while [[ ( $cont -eq 1 ) && ( $result -eq 0 ) ]];
         do
            grep '^LaTeX Warning: Label(s) may have changed.' "${file}.log" \
                 >/dev/null 2>&1
            if [ $? -eq 0 ];
            then
               latex $latex_option "$texfile"
            else
               #
               # Extra test for natbib.
               #
               grep '^(natbib) *Rerun to get citations correct.' \
                   "${file}.log" >/dev/null 2>&1
               if [ $? -eq 0 ];
               then
                  latex $latex_option "$texfile"
               else
                  cont=0
               fi
            fi
            result=$?
            let n_extra_runs-=1
            if [[ $n_extra_runs -eq 0 ]]
            then
               cont=0
            fi
         done
      fi
      if [[ $n_extra_runs -eq 0 ]]
      then
         echo >&2
         echo >&2
         echo >&2 "WARNING: (Default) number of latex re-runs exceeded for file $texfile"
         echo >&2
         echo >&2
      elif [ $result -ne 0 ];
      then
         echo >&2
         echo >&2 "ERROR processing $texfile"
         echo >&2
         exit 1
      fi
   done
fi