问题描述
我有一个Bash脚本，它可以生成，存储和修改数组中的值.这些值以后将用作命令的参数.
I have a Bash script which generates, stores and modifies values in an array. These values are later used as arguments for a command.
对于MCVE，我想到了一个任意命令 bash -c'echo 0 ="$ 0";echo 1 ="$ 1"'解释了我的问题.我将使用两个参数 -option1 = withoutspace 和 -option2 ="with space" 调用命令.所以看起来像这样
For a MCVE I thought of an arbitrary command bash -c 'echo 0="$0" ; echo 1="$1"' which explains my problem. I will call my command with two arguments -option1=withoutspace and -option2="with space". So it would look like this
> bash -c 'echo 0="$0" ; echo 1="$1"' -option1=withoutspace -option2="with space"
如果对命令的调用将直接输入到shell中.它打印
if the call to the command would be typed directly into the shell. It prints
0=-option1=withoutspace
1=-option2=with space
在我的Bash脚本中，参数是数组的一部分.但是
In my Bash script, the arguments are part of an array. However
#!/bin/bash
ARGUMENTS=()
ARGUMENTS+=('-option1=withoutspace')
ARGUMENTS+=('-option2="with space"')
bash -c 'echo 0="$0" ; echo 1="$1"' "${ARGUMENTS[@]}"
打印
0=-option1=withoutspace
1=-option2="with space"
仍显示双引号(因为它们是按字面意义解释的?).有效的是
which still shows the double quotes (because they are interpreted literally?). What works is
#!/bin/bash
ARGUMENTS=()
ARGUMENTS+=('-option1=withoutspace')
ARGUMENTS+=('-option2=with space')
bash -c 'echo 0="$0" ; echo 1="$1"' "${ARGUMENTS[@]}"
再次打印
0=-option1=withoutspace
1=-option2=with space
要使 ARGUMENTS + =('-option2 ="with space"')以及 ARGUMENTS + =('-option2 = with space'] ?
(也许将命令的参数存储在数组中甚至是完全错误的?我愿意提出建议.)
(Maybe it's even entirely wrong to store arguments for a command in an array? I'm open for suggestions.)
推荐答案
删除单引号.完全按照在命令行中的方式编写选项.
Get rid of the single quotes. Write the options exactly as you would on the command line.
ARGUMENTS+=(-option1=withoutspace)
ARGUMENTS+=(-option2="with space")
请注意，这完全等同于您的第二个选择:
Note that this is exactly equivalent to your second option:
ARGUMENTS+=('-option1=withoutspace')
ARGUMENTS+=('-option2=with space')
-option2 =带空格" 和'-option2 =带空格'都计算为同一字符串.它们是写同一件事的两种方式.
-option2="with space" and '-option2=with space' both evaluate to the same string. They're two ways of writing the same thing.
这是完全正确的事情.数组对此是完美的.使用扁平字符串将是一个错误.
It's the exact right thing to do. Arrays are perfect for this. Using a flat string would be a mistake.
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