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gretty

Remove Multi-Line String from File

2 posts in this topic

Hello

I am attempting to remove a multiline string from a file. The multiline string comes from another file and is read into a Batch variable. I then read the target file and search for this multiline string, if it exists I want to delete it from the target file.

Is this kind of functionality possible using Batch Windows Scripting? I really hope it is.

My code below is unable to remove the multiline string from the target file. It can successfully read the input file. Can you help me edit my script to search for and remove a multiline string from a file?

 

@echo off &setlocal enabledelayedexpansion

Set replace=
Set target=
Set infile=usermenuTest1.4d
Set outfile=usermenuTest2.4d

Rem Read file and store all contents in string
for /f "delims=" %%i in (%infile%) do set "target=!target! %%i"
echo %target%

Rem Remove the target string from outfile
@echo off & setlocal enabledelayedexpansion
for /f "tokens=1,* delims=¶" %%A in ( 'type "%outfile%"') do SET "string=%%A"
SET "modified=!string:%target%=%replace%!"
(echo(%modified%)>> "%outfile%"

ECHO.
PAUSE
ENDLOCAL

 

Essentially I want my script to remove the following bold text from a file:
 

// abc

// def

// hij

Menu "User" {
   Button "" {
      Walk_Right ""
   }
}

 

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Is it absolutely mandatory to do this using batch? It's really not designed for this sort of thing and I imagine that (if it's possible at all) the solution will be hideous.

Why not use a language like Python or even PowerShell instead?
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You can use awk / gawk to do it pretty simply, but this is Windows.

 

There is a port of many useful Unix utilities here.  

 

Awk is a utility to scan files for patterns and then do something with the matching lines.

 

There is a command line switch to output everything that does not match.  You want to output all the lines that don't match your pattern, and write that to a file.

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