将输出重定向到 Windows 中另一个命令的命令行参数 [英] Redirecting output to a command-line argument of another command in Windows

问题描述

我如何在 Windows 中使用脚本/命令的输出作为另一个脚本的参数?(管道 | 在这里不起作用，因为其他脚本不会从标准输入中读取)

How can I, in Windows, use the output of a script/command as an argument for another script? (A pipe | will not work here, since that other script doesn't read from the standard input)

太清楚了:我有需要参数 arg 的另一个脚本，例如:

Too clarify: I have AnotherScript that needs an argument arg, e.g.:

AnotherScript 12

现在我希望参数(示例中为 12)来自脚本的输出，称为 ScriptB.所以我想要一些类似

now I want the argument (12 in the example) to come from the output of a script, call it ScriptB. So I would like something along the lines of

AnotherScript (ScriptB)

AnotherScript 实际上是一个需要参数的 python 脚本，而 ScriptB 是一个产生一些数字的 cygwin bash 脚本，所以我想使用它的方式是这样的:

The AnotherScript is actually a python script that requires an argument, and ScriptB is a cygwin bash script that produces some number, so the way I would like to use it is something like:

c:\Python26\python.exe AnotherScript (c:\cygwin|bin|bash --login -i ./ScriptB)

感谢您的回答.但是，考虑到需要费力的for"构造，我重写了 AnotherScript 以从标准输入中读取.这似乎是一个更好的解决方案.

Thanks for the answers. However, given the laborious 'for' construct required, I've rewritten AnotherScript to read from the standard input. That seems like a better solution.

推荐答案

注意:所有这些都要求命令位于批处理文件中.因此双 % 符号.

Note: All this requires the commands to be in a batch file. Hence the double % signs.

您可以使用 for 命令来捕获命令的输出:

You can use the for command to capture the output of the command:

for /f "usebackq delims=" %%x in (`ScriptB`) do set args=%%x

然后您可以在另一个命令中使用该输出:

then you can use that output in another command:

AnotherScript %args%

这将导致 %args% 包含来自 ScriptB 输出的最后一行.如果它只返回一行，您可以将其合并为一行:

This will cause %args% to contain the last line from ScriptB's output, though. If it only returns a single line you can roll this into one line:

for /f "usebackq delims=" %%x in (`ScriptB`) do AnotherScript %%x

在批处理文件之外使用时，您必须使用 %x 而不是 %%x.

When used outside a batch file you have to use %x instead of %%x.

然而，如果 ScriptB 返回多行，AnotherScript 会为每一行运行.您可以通过在第一次循环迭代后中断来规避这一点——尽管只能在批处理文件中进行:

However, if ScriptB returns more than one line, AnotherScript runs for each of those lines. You can circumvent this—though only within a batch file—by breaking after the first loop iteration:

for /f "usebackq delims=" %%x in (`ScriptB`) do AnotherScript %%x & goto :eof

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