#!/usr/bin/bash

function dshow {
    git show $1 | eat-diff-numbers
}

function comp {
    ap="/tmp/[a $3] $(git log --format=%f -n 1 $1).patch"
    bp="/tmp/[b $3] $(git log --format=%f -n 1 $2).patch"
    dshow $1 > "$ap"
    dshow $2 > "$bp"
    if ! diff "$ap" "$bp" > /dev/null ; then
        co=$(git log --format=%s -n 1 $2)
        echo -n $co - differs | tee -a loglog
        echo "$ap - $1"
        echo "$bp - $2"
        echo "type exit to continue"
        #git diff --no-index --color-words --word-diff-regex=. /tmp/{a,b}.patch
        if vimdiff  < /dev/tty -c 0 "$ap" "$bp" ; then
            echo " - ok" | tee -a loglog
        else
            echo " - bad" | tee -a loglog
        fi
        return 1
    fi
}

a=$1
b=$2
n=$3

for ((i=1; i<=n; i++)); do
    rr=$((n - i))
    co=$(git log --format=%s -n 1 $b~$rr)
    if comp $a~$rr $b~$rr $i; then
        echo $co - ok | tee -a loglog
    fi
done