condense

#!/bin/bash

# INSTALL: symlink or copy this file to /usr/local/bin
#
# Move all files in subdirectories to the current level and delete duplicates
#
# Usage:
# $ condense [-c] [-o output] [source]
#
# Positional Arguments:
# * [source]: Root directory to start recursively condensing files from
#
# Options:
# * [-c]: Copy files instead of moving
# * [-o output]: Output directory to transport files to (defaults to source)
#
# Notes:
# The root directory will be searched for duplicate files using fdupes. If any
# changes are made, they are printed to stdout with [+/-] notation

# Parse CLI optional and positional arguments --------------------------------
while getopts "co:" opt; do
    case $opt in
        c)
            copy=true;;
        o)
            output=$OPTARG;;
        \?)
            exit 1;;
        :)
            exit 1;;
    esac
done

copy=${copy:-false}
shift $((OPTIND - 1))
source=${1:-$(pwd)}

if [ -z "$output" ]; then
    output=$source
    keep_source=true
fi

# Execute command ------------------------------------------------------------
fdupes -drqN $source
search="find $source -mindepth 2 -type f"
if [[ "$copy" = true ]]; then
    transport="xargs -I {} cp {} $output"
else
    transport="xargs -I {} mv {} $output"
fi

cmd="$search | $transport"
eval $cmd

if [[ "$keep_source" = true ]]; then
    find $source -mindepth 1 -type d -delete
else
    find $source -type d -delete
fi