#!/bin/bash

function zlipd() {
    printf "\x1f\x8b\x08\x00\x00\x00\x00\x00" | cat - $@ | gzip - dc 2>  /dev/null
}

function move_intermediate_obj() {
    local dst_path
    dst_path=$1;  shift
    while [ -n  "$1" ];  do
        if [ -f .git /objects/ "${1:0:2}" / "${1:2}" ];  then
            mv - v .git /objects/ "${1:0:2}" / "${1:2}" "$dst_path/$1"
        fi
        shift
    done
}
# function migrate_intermediate_obj() {
#     [ ! -d ./.git ] && { echo ".git dir not exist"; return; }
#     [ ! -d ./intermediate_obj ] && mkdir -p intermediate_obj
#     for f in $(git rev-list -n "${2:-1}" "${1:?params not enough}")
#     do
#         # echo "$f"
#         move_intermediate_obj "$f"
#     done
# }

migrate_intermediate_obj ()
{
    [ ! -d ./.git ] && {
        echo ".git dir not exist" ;
        return
    };

    local dst_dir
    [ -d . /output ] && dst_dir=. /output/intermediate_obj ;
    [ -z $dst_dir ] && dst_dir=. /intermediate_obj ;
    mkdir -p $dst_dir

    if [ $ # -eq 1 ]
    then
        move_intermediate_obj $dst_dir  "$1" ;
    elif expr $2 + 0 >  /dev/null 2>&1  # test $2 whether is number otherwise $? neq 0/1 if $2 non-integer argument
    then
        for f  in $(git rev-list -n  "${2:-1}" "${1:?params not enough}" );
        do
            move_intermediate_obj $dst_dir  "$f" ;
        done
    else
        move_intermediate_obj $dst_dir  "$@" ;
    fi
}