#!/bin/bash
#
# Syntax:  mass_move [-h] part1 part2 [file [...]]
#
# Purpose: Replaces part1 in the names of the given files by part2.
#          The default value for file is *${part1}*
#          The -h flag shows the help info for this command.

# Created: Sep 28, 1999       by Bart De Schutter
# Last revised: Jul 31, 2007  by Bart De Schutter
#
# See http://www.deschutter.info/util/scripts.html for the latest version of
# this script.

# Status: public
# Category: files

#
# Process input arguments.
#

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

if [ $# -lt 2 ];
then
   echo >&2
   echo >&2 "ERROR: ${0##*/} requires at least 2 input arguments."
   echo >&2
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

part1="$1"
part2="$2"

shift 2

if [ $# -eq 0 ];
then
   # Recursively call mass_move. This is the easiest way to
   # deal with the list="$@" problem in this case.
   $0 "$part1" "$part2" *${part1}*
fi

#
# Move the files.
#
for fname in "$@"
do
   if [ -f "$fname" ];
   then
      new_name=$(echo "$fname" | sed -e "s/${part1}/${part2}/g")
      if [ "$fname" != "$new_name" ];
      then
#
#  Note: If you use cp -i and answer no, then $? still is 0, but the
#        file is not overwritten. Hence, we use extra tests to prevent
#        a mv statement if the cp -i answer is no.
#
         if [ -e "$new_name" ];
         then
            read -p "cp: overwrite $new_name (y/n)? [n]  " answer
            if [ "$answer" == 'y'  -o  "$answer" == 'Y' ];
            then
               \cp "$fname" "$new_name"
               \mv -i "$fname" "${fname}.bak"
            fi
         else
            \cp "$fname" "$new_name"
            \mv -i "$fname" "${fname}.bak"
         fi
      fi
   fi
done