如何从shell命令中消除vim命令的歧义 [英] How to disambiguate vim commands from shell commands

问题描述

来自如何轻松逃脱命令行过滤器：

实际上，这是一个XY问题。不过，我必须将原始问题发布到另一个问题中，因为Y问题确实很有趣，我想知道。我将在评论中发布指向X问题的链接。

And actually, this has been a bit of an XY problem. I'll have to post the original problem in a different question, though, because the Y question is really interesting and I would like to know. I'll post a link to the X question in the comments.

这是 X问题。

我曾经以为，通过弄清楚如何逃避％，我可以解决问题，但事实证明Vim的行为更深入比我想象的要好。显然，Vim用自己的脚本语言对 | 有特殊的含义，这使事情变得复杂：

I had thought that by figuring out how to escape the %, I would solve the problem, but it turns out Vim's behavior goes deeper than I had thought. And that is that apparently, Vim has some special meaning for | in its own scripting language, which complicates things:

:nmap L :r !ls | awk '{printf "\"\%s\"\n", $0}'<CR>

预期结果：

按 L 将使用 ls 的输出填充缓冲区，并用引号引起来。

Pressing L fills the buffer with the output of ls, with each line quoted.

实际结果：

E492: Not an editor command:  awk '{printf "\"\%s\"\n", $0}')<CR>

Vim似乎认为 awk ，我意思是vim命令，而不是shell命令。我该如何消除歧义？我尝试了许多组合，包括用子外壳包围过滤器，并在AWK前面也放置！，但是...

Vim seems to think by awk, I mean a vim command, rather than a shell command. How do I disambiguate this? I have tried many combinations, including surrounding the filter with a subshell, and putting a ! in front of awk as well, but...

子shell：

:nmap L :r !(ls | awk '{printf "\"\%s\"\n", $0}')<CR>
E492: Not an editor command:  awk '{printf "\"\%s\"\n", $0}')<CR>

Subshel​​l + ！awk ：

Subshell + !awk:

:nmap L :r !(ls | !awk '{printf "\"\%s\"\n", $0}')<CR>
[No write since last change]
/bin/bash: -c: line 0: syntax error near unexpected token `)'
/bin/bash: -c: line 0: `awk '{printf "\"%s\"\n", $0}')<CR>'    
shell returned 1    
Press ENTER or type command to continue
L
:r !(ls

！awk 不带子shell：

!awk without subshell:

:nmap L :r !ls | !awk '{printf "\"\%s\"\n", $0}'<CR>
[No write since last change]
/bin/bash: -c: line 0: syntax error near unexpected token `newline'
/bin/bash: -c: line 0: `awk '{printf "\"%s\"\n", $0}'<CR>'
shell returned 1
Press ENTER or type command to continue
L
:r !ls

我无语。

推荐答案

Ryan 很有帮助地指出，我没有尝试逃避管道的攻击，这完全让我无视：

Ryan helpfully pointed out that I didn't try escaping the pipe. Something that had entirely slipped my mind:

:nmap L :r !ls \| awk '{printf "\"\%s\"\n", $0}'<CR>
               ^

它起作用了。

现在，如果我们能解决 Y问题，我会成为一个快乐的露营者。

Now if we could just solve that Y problem, I would be a happy camper.

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