循环的批处理脚本不会设置变量 [英] Batch script for loop won't set variable

问题描述

我有一个批处理脚本试图在 anthill 外执行以获取包含要编译的 plsql 的文件夹名称.

I have a batch script trying to execute out of anthill to get the folder names containing plsql to be compiled.

for /F %%a in ('dir /b D:AHP_WorkDirvarjobsprojects
prt_test
prt_testplsql') do (
  set FOLDER=%%a
  echo *** PROCESSING FOLDER %FOLDER% ***
)

这回响了* 处理文件夹 *

好像变量没有被设置，我很确定这是在花费太长时间验证之后是正确的

as if the variable is not getting set, which I'm pretty sure is true after spending way too long on verifying it

所以……我做错了什么?

So...What am I doing wrong?

推荐答案

这本质上是 今天早些时候提出的问题.这是我对上述问题的回答...

This is essentially a duplicate of a question asked earlier today. Here's my answer from said question...

您需要查看批处理文件的 EnableDelayedExpansion 选项.来自上述链接:

You'll want to look at the EnableDelayedExpansion option for batch files. From the aforementioned link:

延迟变量扩展在使用 FOR 循环时通常很有用.通常，即使整个 FOR 循环跨越批处理脚本的多行，它也会被视为单个命令.

Delayed variable expansion is often useful when working with FOR Loops. Normally, an entire FOR loop is evaluated as a single command even if it spans multiple lines of a batch script.

所以你的脚本最终看起来像这样:

So your script would end up looking something like this:

@echo off
setlocal enabledelayedexpansion

for /F %%a in ('dir /b D:AHP_WorkDirvarjobsprojects
prt_test
prt_testplsql') do (
  set FOLDER=%%a
  echo *** PROCESSING FOLDER !FOLDER! ***
)

作为替代方法，只需在内部循环中使用 %%a 变量，而不是创建新变量.

As an alternative, just use the %%a variable in your inner loop, rather than creating a new variable.

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