批处理等效于 Bash 反引号
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Batch equivalent of Bash backticks
提问by MiffTheFox
When working with Bash, I can put the output of one command into another command like so:
使用 Bash 时，我可以将一个命令的输出放入另一个命令中，如下所示：
my_command `echo Test`
would be the same thing as
将与
my_command Test
(Obviously, this is just a non-practical example.)
（显然，这只是一个不实际的例子。）
I'm just wondering if you can do the same thing in Batch.
我只是想知道你是否可以在 Batch 中做同样的事情。
采纳答案by zvrba
You can do it by redirecting the output to a file first. For example:
您可以通过首先将输出重定向到文件来实现。例如：
echo zz > bla.txt
set /p VV=<bla.txt
echo %VV%
回答by Michael Burr
You can get a similar functionality using cmd.exe scripts with the for /fcommand:
您可以通过以下for /f命令使用 cmd.exe 脚本获得类似的功能：
for /f "usebackq tokens=*" %%a in (`echo Test`) do my_command %%a
Yeah, it's kinda non-obvious (to say the least), but it's what's there.
是的，它有点不明显（至少可以说），但它就是存在的。
See for /?for the gory details.
查看for /?血腥细节。
Sidenote: I thought that to use "echo" inside the backticks in a "for /f" command would need to be done using "cmd.exe /c echo Test" since echois an internal command to cmd.exe, but it works in the more natural way. Windows batch scripts always surprise me somehow (but not usually in a good way).
旁注：我认为echo在 " for /f" 命令的反引号内使用 " "需要使用 " cmd.exe /c echo Test"来完成，因为它echo是 的内部命令cmd.exe，但它以更自然的方式工作。Windows 批处理脚本总是以某种方式让我感到惊讶（但通常不是很好）。
回答by Weeble
Read the documentation for the "for" command: for /?
阅读“for”命令的文档： for /?
Sadly I'm not logged in to Windows to check it myself, but I think something like this can approximate what you want:
遗憾的是我没有登录到 Windows 来自己检查，但我认为这样的事情可以近似于你想要的：
for /F %i in ('echo Test') do my_command %i
回答by mtalexan
Maybe I'm screwing up the syntax of the standard for /fmethod, but when I put a very complex command involving && and | within the backticks in the limit of the for /f, it causes problems. A slight modification from the usual is possible to handle an arbitrary complexity command:
也许我搞砸了标准for /f方法的语法，但是当我放置一个非常复杂的命令时，涉及 && 和 | 在 限制的反引号内for /f，它会导致问题。对通常的稍作修改就可以处理任意复杂的命令：
SET VV=some_command -many -arguments && another_command -requiring -the-other -command | handling_of_output | more_handling
for /f "usebackq tokens=*" %%a in (`%VV%`) do mycommand %%a
By putting your full and complex command in a variable first, then putting a reference to the variable in the limit rather than putting the complex command directly into the limit of the for loop, you can avoid syntax interpretation issues. Currently if I copy the exact command I have set to the VVvariable in the example above into where it's used, %VV%, it causes syntax errors.
通过首先将完整和复杂的命令放入变量中，然后将对该变量的引用放入限制中，而不是将复杂命令直接放入 for 循环的限制中，这样可以避免语法解释问题。目前，如果我将上VV例中为变量设置的确切命令复制到使用它的位置%VV%，则会导致语法错误。
