#!/bin/sh

clone_code() {
    local url=$1
    local dir=$2    
    local branch=$3

    test -n "$branch" && branch="-b $branch"

    local msg=""
    for i in {1..3}; do
        test -d $dir && rm -fr $dir
        mkdir $dir

        msg=$(git clone $branch $url $dir)
        test $? -eq 0 && return 0

        if [ $i -eq 3 ]; then
            msg="clone failed for 3 times"
            return 1
        fi

        sleep $((RANDOM%15+5))
    done

    echo $msg
    return 1
}

clone_code $1 $2 $3