checkdiff

#!/bin/bash

SOFT_NAME=$(basename $0);

if [ $# -eq 2 ]; then
    SECOND="$1"
    FIRST="$2"
else
    echo "$SOFT_NAME : missing arguments"
    echo "usage : $SOFT_NAME \${source} \${target}"
    exit 127
fi

mkdir -p "/tmp/$SOFT_NAME"

temp_filename="/tmp/$SOFT_NAME/$(random_string 20).diff"

> "$temp_filename"


rm_temp_file () {
    rm $temp_filename
}

trap rm_temp_file EXIT

set -euo pipefail

for file in $(find "$SECOND" -type f -not -path '*/CVS/*' -path '*/.git/*' -path '*/.idea/*');
do
    cfile="${file##$SECOND/}"

    if ! [ -f "$FIRST/$cfile"  ];then

        if diff -u "$FIRST/$cfile" "$SECOND/$cfile" > "$temp_filename";then
            echo "$1::$cfile and $2::$cfile are identical"
        else
            cat $temp_filename | colordiff | less -R
            echo "Press key to continue, y to patch $cfile"
            read -p ""  -n 1 letter
            if [ "$letter" = "y" ]; then
                echo "\nPatching $SECOND/$cfile ..."
                patch -i $temp_filename "$FIRST/$cfile"; 
            fi
        fi
    fi
done