Bash 脚本变量和参数传递

发布于 2024-12-04 01:04:54 字数 644 浏览 2 评论 0原文

我试图在 bash 脚本中将字符串变量传递给应用程序：

    # launch app for translator to verify
    DIR="$( cd "$( dirname "$0" )" && pwd )"

    langstr="'(English)'"
    case $language in
    "fr") 
        langstr="'(French)'";;
    esac

    echo $langstr
    #$DIR/../Debug/MyApp.app/Contents/MacOS/MyApp -AppleLanguages '(French)'
    $DIR/../Debug/MyApp.app/Contents/MacOS/MyApp -AppleLanguages $langstr

回显显示 $langstr 正是我所期望的：'(French)' 。带有硬编码语言参数的注释行工作正常（应用程序以法语启动），但是用带有 $langstr 变量的行替换它会以英语启动应用程序，这可能意味着它在某种程度上忽略了它。

我可能需要的是给自己上一堂关于 bash 变量使用的课，但我希望同时能在这里得到一个快速的答案。

原文

I'm trying to pass a string variable to an application in a bash script:

    # launch app for translator to verify
    DIR="$( cd "$( dirname "$0" )" && pwd )"

    langstr="'(English)'"
    case $language in
    "fr") 
        langstr="'(French)'";;
    esac

    echo $langstr
    #$DIR/../Debug/MyApp.app/Contents/MacOS/MyApp -AppleLanguages '(French)'
    $DIR/../Debug/MyApp.app/Contents/MacOS/MyApp -AppleLanguages $langstr

The echo reveals that $langstr is what I expect it to be: '(French)'. The commented line with the hard coded language parameter works fine (app launches in French), but substituting that with the line with the $langstr variable launches the app in English which probably means that it ignored it some how.

What I probably need is to find myself a lesson on bash variable usage, but I was hoping to get a quick answer here in the meantime.

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旧情勿念 2024-12-11 01:04:54

当您使用这样的变量传递参数时，单引号被视为参数值的一部分。因此，您的应用程序实际上得到的是字符串 '(French)'，而它可能只需要 (French)。将变量赋值更改为 langstr="(French)"。

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高冷爸爸 2024-12-11 01:04:54

为什么需要在变量中使用 cd 命令？就这样吧

langstr="(English)"
case $language in
"fr") 
    langstr="(French)";;
esac

echo $langstr
DIR=$(dirname "$0")
$DIR/../Debug/MyApp.app/Contents/MacOS/MyApp -AppleLanguages "$langstr"

Why do you need the cd command in a variable? Just do it as it is

langstr="(English)"
case $language in
"fr") 
    langstr="(French)";;
esac

echo $langstr
DIR=$(dirname "$0")
$DIR/../Debug/MyApp.app/Contents/MacOS/MyApp -AppleLanguages "$langstr"

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