设置使用bash参数 [英] Setting an argument with bash

问题描述

我经常运行一个简单的bash命令：

I frequently run a simple bash command:

rpm -Uvh --define "_transaction_color 3" myPackage.rpm

这正常工作。

但现在我试图脚本它变成一个bash文件，并使其更加灵活：

But now I'm trying to script it into a bash file, and make it more flexible:

#!/bin/bash
INSTALL_CMD=rpm
INSTALL_OPT="-Uvh --define '_transaction_color 3'"

${INSTALL_CMD} ${INSTALL_OPT} myPackage.rpm

然而，这使生成错误：

However, this keeps generating the error:

error: Macro % has illegal name (%define)

该错误是来自如何 - 定义和引用 _transaction_color 的处理结果
我已经尝试了各种逃避，不同的措辞，甚至使得 INSTALL_OPT 的数组， $ {处理INSTALL_OPT [@]} 。

The error is coming from how --define and the quoted _transaction_color is handled.
I've tried a variety of escaping, different phrasing, even making INSTALL_OPT an array, handled with ${INSTALL_OPT[@]}.

到目前为止，我的努力都没有奏效。结果
很显然，我要的是非常简单的。我只是不知道如何完成它。

So far, my attempts have not worked.
Clearly, what I want is extremely simple. I'm just not sure how to accomplish it.

怎样才能得到的bash来处理我的 - 正确地定义参数

How can I get bash to handle my --define argument properly?

推荐答案

的问题是，引号不变量代换后处理。所以它看起来像你试图定义一个名为宏'_ transaction_color 。

The problem is that quotes are not processed after variable substitution. So it looks like you're trying to define a macro named '_transaction_color.

请尝试使用数组：

INSTALL_OPT=(-Uvh --define '_transaction_color 3')

然后

"$INSTALL_CMD" "${INSTALL_OPT[@]}" myPackage.rpm

将是很重要的 $ {INSTALL_OPT [@]} 双引号内得到requoting。

It's important to put ${INSTALL_OPT[@]} inside double quotes to get the requoting.

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