rename package name: with/without capital letter

replace_string.sh

clear

replace2 () 
{ 
    exclude_dir='.git';

    old_string="$1";
    new_string="$2";
    path=$3;
    cmd="grep --exclude-dir=$exclude_dir -rl '$old_string' $path | xargs sed -i s@$old_string@$new_string@g";
    echo "$cmd";
    echo 'execute?';
    read answer;
    if [ "$answer" = y ]; then
        echo 'evaluating..';
        eval "$cmd";
        echo 'Results:';
        grep --exclude-dir=$exclude_dir -R $new_string $path;
    fi
}

#input: str_from str_to package_dir
replace2 Article Phone ./articles 
replace2 article phone ./articles