patchmaker.sh

#!/bin/bash

cd b

i=0
j=0
FILES=$( find )
NUMFILES=$( echo $FILES |wc -w )

for f in $FILES; do
    if [ -d $f ]; then
        let i+=1
        continue;
    fi

    if [ ! -e ../a/$f ]; then
        let i+=1
        continue;
    fi

    MD5A=$( md5sum ../a/$f |awk '{printf $1}' )
    MD5B=$( md5sum $f |awk '{printf $1}' )
    if [ "$MD5A" != "$MD5B" ]; then
        echo -en "                                                         \r"
        echo -e "$f"

        mkdir -pv ../c/$( dirname $f )
        cp -v $f ../c/$f

        let j+=1
    fi

    let i+=1
    perc=$( expr $i \* 100 / $NUMFILES )
    perc2=$( expr $j \* 100 / $NUMFILES )
    echo -ne "\r$i / $NUMFILES: $perc% ($j: $perc2%)"
done

echo