需要有关 Windows 批处理脚本的帮助，该脚本应根据文件名的一部分设置 var 的 val

Question

这不是作业 - 谁会有关于批处理脚本的作业？ 我需要自动化一些东西。目前有一个硬编码的批处理脚本，需要每天运行来获取系统，并且它需要以动态方式工作。它所需要的输入只是一个内部版本号，该内部版本号可以从位于...（例如 C:\DumpLocation\）的文件名中推断出来。我不擅长批处理脚本，正在寻找批处理忍者。如果由我决定，我会自己用 Python 编写代码，但我不能指望其他人为此安装它。 PowerShell 也并非在每台 Windows 计算机上都可用，因此批处理脚本是最低公分母。

这应该有帮助： http ://www.techsupportforum.com/microsoft-support/windows-xp-support/54848-set-variable-based-output-seach-string-batch.html

这是我希望脚本执行的操作：

dirToLookAt = 'C:\DumpLocation\'
# In that location there should be a single file named
# Custom_SomethingBuild34567Client_12345.zip
# I want to extract the build number into a variable to this effect:
buildNumber = '34567'
# strings which surround the build number are fixed.
# If there is more than one zip file with a build number in it,
# I need to print a warning and pick the largest one.
# I can do the rest.

以下内容也应该有所帮助：

http://www.computing。 net/answers/programming/batch-string-substitution/12097.html

如果您有疑问，请告诉我。

Answer 1

假设 Custom_SomethingBuild 和 Client_12345.zip 是常量，这应该可以解决问题：

@ECHO OFF
SETLOCAL ENABLEDELAYEDEXPANSION

REM Get a count of the files in the directory

set /a FileCount=0
for /f "tokens=* delims= " %%a in ('dir/s/b/a-d C:\DumpLocation') do (
set /a FileCount+=1
)

REM If the file count is greater than or equal to 2, warn the user
IF %FileCount% GTR 1 ECHO The total number of files in the directory is:  %FileCount%

REM If the file count is less than or equal to 0, pause and exit
IF %FileCount% LEQ 0 PAUSE & EXIT

:: For each build number, use that number if it is the largest number
:: In the loop, we'll strip out the assumed constants, leaving us with a build number.

SET Build=
SET /a BuildNum=0
FOR /F %%A IN ('DIR /P /B C:\DumpLocation') DO (
   SET Build=%%A
   SET Build=!Build:Custom_SomethingBuild=!
   SET Build=!Build:Client_12345.zip=!
   IF !Build! GTR !BuildNum! SET /a BuildNum=!Build!
)

ECHO The greatest build number in the directory is:  %BuildNum%

PAUSE