Rename all the files in a directory with their parent directory name.

dir-to-filename.sh

#!/usr/bin/env bash

# Dir to Filename
# Rename all the files in a directory with their parent directory name.
# Copyright (C) Kyle Brumm <http://kylebrumm.com>

if [ "$1" = "-h" -o "$1" = "--help" ]; then cat <<EOF

Dir to Filename

Rename all the files in a directory with their parent directory name.
This will also lowercase and hyphenate the parent directories.

Note: Run in the directory that contains the directories you want to be changed.

Usage:
    dir-to-filename

EOF
exit; fi

for dir in * ; do
    d=${dir// /-}
    d=$(echo "$d" | tr '[:upper:]' '[:lower:]')
    mv "$dir" "$d"

    if [ "$(ls -A "$d")" ]; then
        num="1"
        for file in "$d"/* ; do
            ext="${file##*.}"
            mv "$file" "$d/$d$num.$ext"
            ((num++))
        done
    fi
done