忽略 apt-get 下载错误

Question

我正在尝试下载一些软件包进行离线安装apt-get download，但由于某种原因，apt-rdepends包括不存在的软件包。这是我正在使用的命令：

apt-get download $(apt-rdepends libboost1.55-all-dev | grep -v "^ ")

这是我得到的输出：

E: Can't select candidate version from package libstdc++-dev as it has no candidate
E: Can't select candidate version from package debconf-2.0 as it has no candidate
E: Can't select candidate version from package libc-dev as it has no candidate
E: Can't select candidate version from package python-celementtree as it has no candidate
E: Can't select candidate version from package python-elementtree as it has no candidate

但apt一直抱怨有套餐没有候选人。我想忽略这些错误并下载软件包及其依赖项。我似乎找不到一个可以让我忽略apt-get错误的标志。我该怎么做呢？

Answer 1

由于apt-rdepends没有提供忽略包的方法，因此需要包装器来从下载列表中删除无法满足的包。一种相对可移植的自动化方法是使用下面的 BASH 脚本，而无需首先安装 Perl/Python 等解释器。

getdepends.sh：

 #!/bin/bash
 export MAXPARAMETERS=255

 function array_contains_find_index() {
     local n=$#
     local i=0
     local value=${!n}

     for (( i=1; i < n; i++ )) {
         if [ "${!i}" == "${value}" ]; then
             echo "REMOVING $i: ${!i} = ${value}"
             return $i
         fi
     }
     return $MAXPARAMETERS
 }

 LIST=( $( apt-rdepends $1 | grep -v "^ " ) )
 echo ${LIST[*]}
 read -n1 -r -p "... Packages that will be downloaded (Continue or CTRL+C) ..."

 RESULTS=( $( apt-get download ${LIST[*]} |& cut -d' ' -f 8 ) )
 LISTLEN=${#LIST[@]}

 while [ ${#RESULTS[@]} -gt 0 ]; do
     for (( i=0; i < $LISTLEN; i++ )); do
         array_contains_find_index ${RESULTS[@]} ${LIST[$i]}
         ret=$?

         if (( $ret != $MAXPARAMETERS )); then
             unset LIST[$i]
         fi
     done

     FULLRESULTS=$( apt-get download ${LIST[*]} 2>&1  )
     RESULTS=( $( echo $FULLRESULTS |& cut -d' ' -f 11 | sed -r "s/'(.*?):(.*$)/\1/g" ) )
 done

 apt-get download ${LIST[*]}

运行脚本：

 ./getdepends.sh [package name]

我编写的具有更多日志记录功能的注释版本可在此处的 Pastebin 上找到：

http://pastebin.com/kj2evSt7