A bash script for getting the different file names between two folders. This is useful for removing Files that are named wrong in Hyperspin setups

compareFolders.sh

#/bin/bash

# http://stackoverflow.com/questions/26935515/in-linux-how-to-compare-two-directories-by-filename-only-and-get-list-of-result

# How to read bash script flags: http://stackoverflow.com/questions/14447406/bash-shell-script-check-for-a-flag-and-grab-its-value

if [ "$#" -ne 4 ]; then

        # Not Enough Params, Show Usage

        echo "Rom/Snap Folder Compare"
        echo "USAGE: [script.sh] [folder 1] [folder 2] [file exenstions of folder 1] [file extensions of folder two]"

    echo "NOTE: Extensions should have no '.', and folders should have no trailing slash"
    exit 0
fi


SAVEIFS=$IFS
IFS=$(echo -en "\n\b")
folder1=$1
folder2=$2
ext1=$3
ext2=$4


for fullfile in ${folder1}/*.$ext1
do
        #echo "$fullfile fullfile"
        filename=$(basename "$fullfile")
        #echo "$filename file"
        extension="${filename##*.}"
        #echo "$extension ext"
        cleanfilename="${filename%.*}"
        #echo "$cleanfilename base"
        if ! [ -a "${folder2}/$cleanfilename.$ext2" ]
        then
                echo $fullfile
        fi
done
IFS=$SAVEIFS