#!/usr/bin/sh 
# by bill mcnamara wimac@tidhom1g.grenoble.hp.com wmcn@ireland.com
#set -x

if [ $# -lt 3 ];
then
  echo "\n================================================================"
  echo "       You must supply the old string and the new string:"
  echo "       and the option"
  echo ""
  echo "       Example:  $0 oldtext newtext [preview | replace]"
  echo ""
  echo "       CAUTION: using replace will overwrite the files"
  echo "                containing the string $1"
  echo "       NOTE: a backup of the file will be save in file.bak"
  echo "             this file.bak will be deleted the next time"
  echo "             this script is executed."
  echo "================================================================\n"
  exit 1
fi

typeset OLD=$1 
typeset NEW=$2 
typeset OPT=$3 
 
echo "\n================================================================="
echo "\nStarting sed"
touch /tmp/sedname.log

# cleanup
for F in $(find . -type f | xargs grep $1 | awk '{print $1}' | cut -d: -f1) 
do 

if [ -f $F.bak* ]; then
 rm $F.bak*
fi
if [ -f $F.new* ]; then
 rm $F.new*
fi

# kludge for sed end of file 'bug'
if [ -f .ranlast ]; then
 touch .ranlast
else
 touch .ranlast
 chmod 600 .ranlast
 echo "" >> $F
fi

# don't want to look at binaries
 if [ `file $F|awk '{print $2}'` = ascii ] 
  then
   echo ".\c"
   sed "s/$OLD/$NEW/g" $F > ${F}.bak 
if [[ $OPT = "replace" ]]; then
   echo "replace: $F"
   cp $F.bak $F 
fi
 fi 

# don't want to look at binaries
 if [ `file $F|awk '{print $3}'` = text ] 
  then 
   echo ".\c"
   sed "s/$OLD/$NEW/g" $F > ${F}.bak 
if [[ $OPT = "replace" ]]; then
   echo "replace: $F"
   mv $F.bak $F 
fi
 fi 
 echo "$F" >> /tmp/sedname.log
done 

# summarise 
echo "\nDone"
echo "\n================================================================="
  echo "\ninstances --- filename"
  cat /tmp/sedname.log | sort | uniq -c
  echo " -- "
if [[ $? = 0 ]]; then
  echo " NOTE: $1 appears in the following filename/s"
  cat /tmp/sedname.log | grep $1 | uniq 
  echo "       rename the file/s if you find necessary"
fi 
  echo "\n================================================================="
  rm /tmp/sedname.log
#.end.