Linux 带有单引号和双引号的 bash 别名命令
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bash alias command with both single and double quotes
提问by pragmatic_programmer
I have this command that does what I want but I can't get to alias it in my .bashrc (note that it uses both single and double quotes):
我有这个命令可以执行我想要的操作，但我无法在我的 .bashrc 中为其添加别名（请注意，它同时使用单引号和双引号）：
svn status | awk ' =="M"{print ;}'
I've tried:
我试过了：
alias xx="svn status | awk ' ==\"M\"{print ;}'"
And some other common sense combinations with no luck.. I know that bash is very picky with quotes.. So what's the correct way to alias it and why ? Thanks
还有其他一些没有运气的常识组合..我知道bash对引号非常挑剔..那么正确的别名方法是什么，为什么？谢谢
采纳答案by ffledgling
You just need to escape it correctly.
你只需要正确地逃避它。
alias xxx="svn status | awk '$1 ==\"M\"{print $2;}'"
回答by EJK
Here's something that accomplishes the same thing without using an alias. Put it in a function in your .bashrc:
这是在不使用别名的情况下完成相同事情的东西。把它放在你的 .bashrc 中的一个函数中：
xx() {
svn status | awk ' =="M"{print ;}'
}
This way you don't have to worry about getting the quotes just right. This uses the exact same syntax you would at the command line.
这样您就不必担心报价是否正确。这与您在命令行中使用的语法完全相同。
回答by Pablo A
Since Bash 2.04there is a third (easier) way beside using a function or escaping the way @ffledgling did: using string literal syntax (here is an excellent answer).
从Bash 2.04 开始，除了使用函数或逃避@ffledgling 所做的方式之外，还有第三种（更简单的）方法：使用字符串文字语法（这是一个很好的答案）。
So for example if you want to make an alias of this onlinerit will end up being:
因此，例如，如果您想为这个在线用户创建一个别名，它最终将是：
alias snap-removedisabled=$'snap list --all | awk \'~"disabled"{print " --revision "}\' | xargs -rn3 snap remove'
So you just have to add the $in front of the string and escape the single quotes.
所以你只需要$在字符串前面添加并转义单引号。
This brings a shellcheck warningyou could probably safely disable with # shellcheck disable=SC2139.
