bash - 如果未安装某些软件，如何检入bash脚本？

我想查看软件列表(如果已安装)。如果不是，则应显示该脚本，并且脚本应中止/退出。如果我执行一次脚本，输出应如下所示:

  wget is not installed
  telnet is not installed

当前看起来如下:

  wget is not installed

再次执行脚本...

  telnet is not installed

当前脚本正在检查已安装的软件，如果未安装当前检查的软件，则中止/存在。这不好，因为您必须多次运行脚本才能识别和检查是否已安装每个软件:

  LINUX_DISTRIBUTATION=$(grep -Eo "(Debian|Ubuntu|RedHat|CentOS)" /etc/issue)

  # Debian / Ubuntu
  if [ -f /etc/debian_version ] || [ "$LINUX_DISTRIBUTATION" == "Debian" ] || [ "$LINUX_DISTRIBUTATION" == "Ubuntu" ]; then
          declare -a NEEDED_SOFTWARE_LIST=(bash rsync wget grep telnet sed)

          for SOFTWARE in ${NEEDED_SOFTWARE_LIST[@]}; do
                  dpkg -l | grep -i $SOFTWARE | head -1 | if [[ "$(cut -d ' ' -f 1)" != "ii" ]]; then
                          echo -e "[ ${Red}FAILED ${RCol}]\t$SOFTWARE is NOT installed completely! Please install it...\n";
                          exit 1;
                  fi
          done
  # RedHat / CentOS
  elif [ -f /etc/redhat-release ] || [ "$LINUX_DISTRIBUTATION" == "RedHat" ] || [ "$LINUX_DISTRIBUTATION" == "CentOS" ]; then
          declare -a NEEDED_SOFTWARE_LIST=(bash rsync wget grep telnet sed)

          for SOFTWARE in ${NEEDED_SOFTWARE_LIST[@]}; do
                  if [[ "$(rpm -q $SOFTWARE)" == "package $SOFTWARE is not installed" ]]; then
                          echo -e "[ ${Red}FAILED ${RCol}]\t$SOFTWARE is NOT installed completely! Please install it...\n";
                          exit 1;
                  fi
          done
  else
          echo "[ ${Red}FAILED ${RCol}]\tYour system is currently not supported by this script.";
          exit 1;
  fi

我也认为，我的解决方案不是最好的。有人可以调整吗？提前致谢! :)

提示:我两次声明了变量“NEEDED_SOFTWARE_LIST”，因为我认为我将需要两个“数组”的软件列表，因为某些发行版需要另一个软件包。

最佳答案

为什么您要对安装的软件包进行严格的测试，而不是仅仅检查某些实用程序的可用性？

SCRIPTNAME="${0##*/}"

warn() {
    printf >&2 "$SCRIPTNAME: $*\n"
}

iscmd() {
    command -v >&- "$@"
}

checkdeps() {
    local -i not_found
    for cmd; do
        iscmd "$cmd" || {
            warn $"$cmd is not found"
            let not_found++
        }
    done
    (( not_found == 0 )) || {
        warn $"Install dependencies listed above to use $SCRIPTNAME"
        exit 1
    }
}

checkdeps wget rsync realpath

但是，如果要检查软件包是否已安装在Debian上，请更换此噩梦

dpkg -l | grep -i $SOFTWARE | head -1 | if [[ "$(cut -d ' ' -f 1)" != "ii" ]]; then

和

if dpkg -l $SOFTWARE; then

关于bash - 如果未安装某些软件，如何检入bash脚本？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/20815433/