使用apt递归下载deb包用于离线环境

#! /bin/bash
basepath=$(cd `dirname $0`; pwd)
pkg="$*"

function getDepends()
{
  ret=`apt-cache depends $1 |grep -i Depends |cut -d: -f2 |tr -d "<>"`
  if [[ -z $ret ]]; then
#    echo '$1 No depends'
    echo -n
  else
    for i in $ret
    do
       if [[ `echo $pkg |grep -e "$i "` ]]; then
#         echo "$i already in set"
         echo -n
       else
         pkg="$pkg $i"
         echo "Download $i ing"
         getDepends $i
       fi
    done
  fi
}

for j in $@
do
  getDepends $j
done

echo $pkg
#apt install $pkg --reinstall -d -y
apt-get download $pkg -d -y