batch-rename.sh

#!/bin/sh

while [ "$#" -gt 0 ]; do
  case "$1" in
    -s) substr="$2"; shift 2;;
    -r) replace="$2"; shift 2;;
    -p) filepath="$2"; shift 2;;

    --substr=*) substr="${1#*=}"; shift 1;;
    --replace=*) replace="${1#*=}"; shift 1;;
    --filepath=*) filepath="${1#*=}"; shift 1;;
    --substr|--replace|--filepath) echo "$1 requires an argument" >&2; exit 1;;

    -*) echo "unknown option: $1" >&2; exit 1;;
    *) handle_argument "$1"; shift 1;;
  esac
done

if [ "$filepath" = "" ]; then
  echo "no --filepath option"
  exit 2;
fi

if [ "$substr" = "" ]; then
  echo "no --substr option"
  exit 2;
fi

cd "$filepath" || exit

files=$(ls -- *"$substr"*)

if [ "$files" = "" ]; then
  echo "no files have been found"
  exit 2;
fi

moveFiles() {
  for f in $files;do
    tmp=$(echo "$f" | sed -e s/"$substr"/"$replace"/g)
    mv -v "$f" "$tmp"
  done
}

# Ask for prompt
echo "Are you sure you want to move these files? (Y/n)"
echo "files to be moved:"
echo "------------------"
echo "$files"
echo "------------------"
echo "(Y/n)?"

read -r are_you_sure

if [ "$are_you_sure" = "n" ]; then
  exit 0;
fi

if [ "$are_you_sure" = "Y" ]; then
  moveFiles
fi