Diff two branch what was not cherry-picked and cherry-pick with -c option

cherry_diff.sh

#!/bin/sh

while getopts "c" opt
do
    case $opt in
    c)
        do_cherry_pick=true
        ;;
    esac
done

shift $(($OPTIND - 1))

if [ $# -lt 1 ]
then
    echo "Usage: $0 [-c] [upstream_branch] working_branch"
    exit 1
fi

if [ $# -eq 1 ]
then
    upstream_branch=$(git symbolic-ref --short HEAD)
    working_branch=$1
else
    upstream_branch=$1
    working_branch=$2
fi

commits=$(git cherry -v $upstream_branch $working_branch | grep "^+" | sed "s/^+/#/" | $EDITOR)

if [ "$do_cherry_pick" = true ]
then
    if [ $# -gt 1 ]
    then
        git checkout $upstream_branch
    fi

    echo "$commits" | grep -v "^#" | sed "s/ .*//" | xargs git cherry-pick
fi