#!/bin/bash
#
# Syntax:  tgrep [-h] [-l] [-p] [-w] [-u] [-o] string
#
# Purpose: Searches all .tex files in the directory ~ and its
#          subdirectories for  string .
#          If the option -w is specified, tgrep searches for  string  as a
#          word.
#          If the option -u is specified, tgrep distinguishes between upper
#          and lower case letters.
#          If the option -p is specified, the search considers only the
#          directory ~/pub .
#          If the option -l is specified, the search considers only the
#          directories ~/pub, ~/edu, and ~/latex .
#          If the option -o is specified, 'old' and 'bak' subdirectories are
#          also searched.
#          The -h flag shows the help info for this command.

# Created: Nov  8, 1993       by Bart De Schutter
# Last revised: Jan  2, 2011  by Bart De Schutter
#
# See http://www.deschutter.info/util/scripts.html for the latest version of
# this script.

# Status: public
# Category: latex

if [  $# -ge 1   -a   "$1" = "-h"  ];
then
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

#
#  Process input arguments and display error message if necessary.
#

word_option=""
case_option="-i"
old_dirs=0
pub_dir_only=0
latex_dirs_only=0

while getopts :wpulo option
do
   case "$option" in
      w) word_option="-w";;
      u) case_option="";;
      l) latex_dirs_only=1;;
      p) pub_dir_only=1;;
      o) old_dirs=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 [ $# -ne 1 ];
then
   echo >&2
   echo >&2 "ERROR: ${0##*/} requires exactly 1 input argument."
   echo >&2
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

if [ $old_dirs -eq 0 ];
then
   find_options='! -path "*/old/*" ! -path "*/bak/*"'
else
   find_options=""
fi

cd ~
if  [ $latex_dirs_only -eq 1 ];
then
   search_dirs="./pub ./edu ./latex"
else
   if [ $pub_dir_only -eq 1 ];
   then
      search_dirs="./pub"
   else
      search_dirs="."
   fi
fi

find $search_dirs $find_options\
            -name "*.tex" \
            -exec findgrepsub $case_option $word_option "$1" {} \;