bulk-rename.sh

#!/bin/bash

# forked from https://github.com/andreyvit/bulk-rename/blob/master/bulk-rename

usage() {
  echo "Rename/move/copy files by editing in your editor"
  echo
  echo "Example - rename all md files"
  echo "  /path/to/bulk-rename *.md"
  echo
  echo "Example - rename .cpp files recursively"
  echo "  find . -name '*.cpp' -print0 | xargs -0 /path/to/bulk-rename"
}

action="mv"

declare -a args
while test -n "$1"; do
    case "$1" in
        -c | --copy)
            action="cp"
            shift;;
        -d | --destination)
            dest_dir="$( cd "$2"; pwd )"
            shift; shift;;
        --help)
            usage
            exit 0;;
        --version)
            echo "$VERSION"
            exit 0;;
        --)
            shift
            args=("${args[@]}" "${@}")
            break;;
        -*)
            echo "** Unknown option '$1'. Stop." >&2
            exit 10;;
        *)
            args=("${args[@]}" "$1")
            shift;;
    esac
done
set -- "${args[@]}"

# command_file="$(mktemp -t bulkren)"

longest=0
for file in "$@"; do
    file_name="$file"
    test ${#file_name} -gt $longest && longest=${#file_name}
done


(
    echo "function $action() {"
    echo "    src=\"\$1\""
    echo "    dest=\"\$2\""
    test -n "$dest_dir" &&
    echo "    dest=\"$dest_dir/\$dest\""
    echo "    {"
    echo "        /bin/mkdir -p \"\$(dirname \"\$dest\")\" &&"
    echo "        /bin/$action \"\$src\" \"\$dest\" ||"
    echo "        exit 1"
    echo "    } && ( test -z \"\$dry_run\" || exit 42 )"
    echo "}"
    echo
    echo
    echo "# Edit the second column of names. Close your editor when done."
    test -n "$dest_dir" && echo "# Results actually go into $dest_dir"
    for file in "$@"; do
        file_name="$file"
        padded_name=""
        echo "$action  $(printf %-${longest}s "\"$file_name\"")  \"$file_name\""
    done
)

echo $command_file