Split a text file into multiple files at a specific line size

splitfile.bat

@echo OFF
cls

TITLE SPLIT FILE

set originalFile=%1
set splitLine=%2

:: Where I'm running this script from
set thisScriptPath=%~dp0

:: set to splitLine to create the initial file or wipe clean if it exists
set currentLineNumber=%splitLine%

set newFileNumber=1
set outputFile=%originalFile%_%newFileNumber%.txt

if "%originalFile%"=="" GOTO :ENVIRONMENTNOTSET
if "%splitLine%"=="" GOTO :ENVIRONMENTNOTSET

set outputFileAndPath=%thisScriptPath%%outputDirectory%\%outputFile%


:: Red
  set backgroundColor=4

:: white
  set foregroundColor=7

echo WORKING ...
:: Set the background and foreground color to show that it is working
  color %backgroundColor%%foregroundColor%


:: Look for .prt files recursively in all folders
FOR /F %%i in (%originalFile%) DO CALL :SPLIT_FILE %%i

cls
echo DONE... Splitting File: %originalFile%


:: Sets the background and foreground color back to standard
  color 07

GOTO :QUIT
::~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


:SPLIT_FILE
  set lineInFile=%*

  if %currentLineNumber%==%splitLine% CALL :CREATE_NEW_FILE

  set /A currentLineNumber+=1

  :: Populate the new file
  echo %lineInFile% >> %outputFile%


  GOTO :EOF



:CREATEDIR
    set argument=%*

    :: If the folder does not exist this will create it
    if not exist %thisScriptLocation%\%argument% md %argument%

    GOTO :EOF



:CREATE_NEW_FILE
    
    :: Reset line number
    set currentLineNumber=0

    set outputFile=%originalFile%_%newFileNumber%
    
    :: Wipe existing file out if it exists
    echo. > %outputFile%

    :: Incriment the File number by 1
    set /A newFileNumber+=1

    cls
    echo WORKING ... Creating: %outputFile%

    GOTO :EOF



:ENVIRONMENTNOTSET

  echo.
  echo MISSING REQUIRED ARGUMENTS
  echo ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  echo USAGE: %~0 originalFile outputDirectory splitLine
  echo EXAMPLE: %~0 items.txt 6000 output
  echo.
  echo.
  echo YOU PROVIDED:
  echo.
  if "%originalFile%"=="" (ECHO inputFile= *MISSING*) ELSE (ECHO %originalFile%)
  if "%splitLine%"=="" (ECHO outputFile= *MISSING*) ELSE (ECHO %splitLine%)
  if "%outputDirectory%"=="" (ECHO outputFile= [OPTIONAL]) ELSE (ECHO %outputDirectory%)
  echo.



:QUIT

  :: Set the Toolbar back to CMD
  title %comspec%