A shell script to perform a recursive diff between two folders

folder_diff

#!/bin/bash

## get the folders
folder1=$1
folder2=$2
empty="..."

# check we have two folders
if [ -z "$folder2" ]; then 
    echo " Missing folders to diff "
    echo " Usage : "
    echo "      folder_diff path/to/folder1 path/to/folder2"
    exit 1
fi


#IFS=$'\n'
for file in $(grep --binary-files=without-match --files-with-matches --no-messages --recursive --max-count=1 '.' "$folder1"); do

    base=$(basename $file)
    need_diff=`diff -q "$file" "${file/${folder1}/${folder2}}"`
    
    if [ -z "$need_diff" ]; then
		echo "    - Processing file $base : no difference"
    else
        read -n1 -p "    - Processing file $base (d to show diff, i to ignore, q to quit) " input
        if [ "$input" = "q" ]; then 
			echo ""
			exit 0
		fi
		
	        echo ""
		if [ "$input" = "d" ]; then 
			# -N : treat absent file as empty
			# -w : ignore all whitespaces
			# -B : ignore blank lines
			colordiff -N -wB "$file" "${file/${folder1}/${folder2}}"

			read -n1 -p "    nothing more to report (enter to continue or q to quit) " input
			if [ "$input" = "q" ]; then 
				echo ""
				exit 0
			fi
		fi
    fi
    
    

done