使用 bash 设置参数 [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

哪个工作正常.

但现在我正在尝试将其编写到 bash 文件中，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，这不断产生错误:

However, this keeps generating the error:

error: Macro % has illegal name (%define)

错误来自 --define 和引用的 _transaction_color 的处理方式.
我尝试了各种转义、不同的措辞，甚至将 INSTALL_OPT 变成一个数组，用 ${INSTALL_OPT[@]} 处理.

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，我的尝试没有奏效.
显然，我想要的非常简单.我只是不确定如何完成它.

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

如何让 bash 正确处理我的 --define 参数?

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

推荐答案

问题是变量替换后没有处理引号.所以看起来您正在尝试定义一个名为 '_transaction_color 的宏.

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.

尝试使用数组:

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

然后:

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

将 ${INSTALL_OPT[@]} 放在双引号内以获得重新引用很重要.

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

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