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Accepted
Dolores Stevens
Asked: 2020-03-26 10:13:02 +0800 CST

在 (.bat) 代码的括号内通过管道传输到 FINDSTR 时，是否有更好的方法来缓解这种模糊的颜色错误？

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在下面的 .BAT 文件中，测试 2 演示了带括号的代码块中的颜色错误，测试 3 演示了 FOR 循环中的错误，测试 4 显示了如何通过调用无操作子例程 ( call :重置ANSI）。我的问题是：

  1. 错误的性质是什么......为什么在括号内的代码块中管道到 FINDSTR 后内联颜色代码会失败？这个错误是 FINDSTR 特有的，还是更普遍的？（FINDSTR 有一些已知的错误，但我没有看到其中列出了这个。）

  2. 调用无操作子例程是缓解此错误的最佳方法吗？

代码下方是显示输出的屏幕截图，显示颜色代码在测试 2 和 3 中本应以洋红色显示的行中失败。

提前感谢任何试图提供帮助的人！

[编辑 3/26/2020：因为论坛没有在 .bat 代码的颜色代码定义中显示 Esc 字符，所以我编辑了 .bat 代码，因此它将在运行时生成 Esc 字符。]

@echo off
goto :main

:resetANSI
EXIT /B

:main
setlocal EnableDelayedExpansion
for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "ESCchar=%%E"
set "green=%ESCchar%[92m"
set "yellow=%ESCchar%[93m"
set "magenta=%ESCchar%[95m"
set "cyan=%ESCchar%[96m"
set "white=%ESCchar%[97m"

echo %white%Test 1 is NOT in a FOR loop nor within parentheses.
   echo %yellow%[Test 1] %green%This is Green,  %magenta%this is Magenta, and %yellow%this is Yellow.
   echo %Next, the string 'success' will be piped to FINDSTR...
   echo success | findstr /R success
   echo %magenta%This is supposed to be magenta, and FINDSTR found and displayed 'success'.%yellow%
echo %cyan%Test 1 completed.

echo %white%Test 2 is within parentheses.
(  echo %yellow%[Test 2] %green%This is Green,  %magenta%this is Magenta, and %yellow%this is Yellow.
   echo %Next, the string 'success' will be piped to FINDSTR...
   echo success | findstr /R success
   echo %magenta%This is supposed to be magenta, and FINDSTR found and displayed 'success'.%yellow%
)
echo %cyan%Test 2 completed.

echo %white%Test 3 is within a FOR loop.
for /L %%G in (3,1,3) do (
   echo %yellow%[Test %%G] %green%This is Green,  %magenta%this is Magenta, and %yellow%this is Yellow.
   echo %Next, the string 'success' will be piped to FINDSTR...
   echo success | findstr /R success
   echo %magenta%This is supposed to be magenta, and FINDSTR found and displayed 'success'.%yellow%
)
echo %cyan%Test 3 completed.%white%

echo %white%Test 4 is within a FOR loop and includes a call/return after the pipe to FINDSTR.
for /L %%G in (4,1,4) do (
   echo %yellow%[Test %%G] %green%This is Green,  %magenta%this is Magenta, and %yellow%this is Yellow.
   echo %Next, the string 'success' will be piped to FINDSTR...
   echo success | findstr /R success
   call :resetANSI
   echo %magenta%This is supposed to be magenta, and FINDSTR found and displayed 'success'.%yellow%
)
echo %cyan%Test 4 completed.%white%

exit /B

.BAT 程序输出的屏幕截图

batch-file colors

1 个回答

  1. Best Answer

    建立在用户 vssher 尝试回答问题的基础上（vssher 在发现无法正常工作后删除了他/她的尝试）我认为我找到了最佳解决方案：将 FINDSTR 命令放在嵌套括号中。该解决方案在以下 .bat 代码的测试 3 和 4 中进行了演示，显示输出的屏幕截图显示在 .bat 代码下方：

    @echo off
setlocal EnableDelayedExpansion

rem  Define some useful colorcode vars:
for /F "delims=#" %%E in ('"prompt #$E# & for %%E in (1) do rem"') do set "ESCchar=%%E"
set "green=%ESCchar%[92m"
set "yellow=%ESCchar%[93m"
set "magenta=%ESCchar%[95m"
set "cyan=%ESCchar%[96m"
set "white=%ESCchar%[97m"
set "black=%ESCchar%[30m"

echo %white%Test 1 is NOT in a FOR loop nor within parentheses, and color works right.
   echo %yellow%[Test 1] %green%This is Green, %magenta%this is Magenta, and %yellow%this is Yellow.
   echo Next, the string 'success' will be piped to FINDSTR...%white%
   echo success | findstr /R success
   echo %magenta%This is magenta and FINDSTR found and displayed 'success' in white.%yellow%
   echo %green%This is green.
echo %cyan%Test 1 completed.

echo:
echo %white%Test 2 is within parentheses, and color stops working after the pipe to FINDSTR.
(  echo %yellow%[Test 2] %green%This is Green, %magenta%this is Magenta, and %yellow%this is Yellow.
   echo Next, the string 'success' will be piped to FINDSTR...%white%
   echo success | findstr /R success
   echo %magenta%This is supposed to be magenta and FINDSTR found and displayed 'success' in white.
   echo %green%This is supposed to be green.
)
echo %cyan%Test 2 completed.

echo:
echo %white%Test 3 is within parentheses, but color works because FINDSTR is nested within parentheses.
(  echo %yellow%[Test 3] %green%This is Green, %magenta%this is Magenta, and %yellow%this is Yellow.
   echo Next, the string 'success' will be piped to FINDSTR...%white%
   echo success | ( findstr /R success )
   echo %magenta%This is magenta and FINDSTR found and displayed 'success' in white.
   echo %green%This is green.
)
echo %cyan%Test 3 completed.

echo:
echo %white%Test 4 is within parentheses, FINDSTR is nested within parentheses, 
echo and FINDSTR is piped a string that does NOT match what it's searching for.
(  echo %yellow%[Test 4] %green%This is Green, %magenta%this is Magenta, and %yellow%this is Yellow.
   echo Next, the string 'failed' will be piped to FINDSTR...%white%
   echo failed | ( findstr /R success )
   echo %magenta%This is magenta and FINDSTR correctly displayed nothing.
   echo %green%This is green.
)
echo %cyan%Test 4 completed.

    显示 .bat 代码的输出

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