how to separate single text file into multiple text file by lines using batch?

Question

I have running the following program,

@echo off
cls
set /p "filename=type file name>"
setlocal enabledelayedexpansion
for /r E:\ %%a in (*) do if "%%~nxa"=="%filename%" (
echo %%~dpnxa >>path.txt
)

I have got a output file path.txt which contains,

E:\new.txt 
E:\Redmi\new folder\new.txt
E:\windows\new folder\new folder\new.txt

I like to have those in separate files like,

E:\new.txt in path1.txt

E:\Redmi\new folder\new.txt in path2.txt

E:\windows\new folder\new folder\new.txt in path3.txt

Answer 1

How can I separate single text file into multiple text file by lines?

Building on the comment by Seth, you can use the following batch file:

@echo off
cls
setlocal enabledelayedexpansion
set /p "filename=type file name>"
rem initialise counter to 1
set _count=1
for /r E:\ %%a in (*) do if "%%~nxa"=="%filename%" (
  echo %%~dpnxa >>path!_count!.txt
  rem increment the counter
  set /a _count+=1
  )
endlocal

Notes:

• I have moved the setlocal line in order to stop the variable filename leaking into the calling cmd shell.

---

Further Reading

• An A-Z Index of the Windows CMD command line
• A categorized list of Windows CMD commands
• enabledelayedexpansion - Delayed Expansion will cause variables to be expanded at execution time rather than at parse time.
• endlocal - End localisation of environment changes in a batch file. Pass variables from one batch file to another.
• for /r - Loop through files (Recurse subfolders).
• set - Display, set, or remove CMD environment variables. Changes made with SET will remain only for the duration of the current CMD session.
• setlocal - Set options to control the visibility of environment variables in a batch file.

Answer 2

I have a much simpler, and probably faster solution for you:

• Use DIR /S /B /A-D instead of FOR /R to get the path list. This eliminates the need for an IF statement.
• Pipe to FINDSTR /N, matching on the beginning of a line, to get the line number for use in output file name.
• Execute the entire thing within FOR /F to iterate and parse the results into the line number and the path of each line.

@echo off
setlocal
set /p "filename=type file name>"
for /f "delims=: tokens=1*" %%A in (
  'dir /s /b /a-d "E:\%filename%" ^| findstr /n "^"'
) do >"path%%A.txt" echo %%B

If it were my script, I would pass the target filename as an argument rather than prompt for it:

@echo off
for /f "delims=: tokens=1*" %%A in (
  'dir /s /b /a-d "E:\%~1" ^| findstr /n "^"'
) do >"path%%A.txt" echo %%B