I'm trying to make an auto-updating .bat program - batch-file

Question

So, how I have it done right now, is that it that it calls another bat file to update it, and then that batch file updates, and sets %ERRORLEVEL% to 1. At the start of the original program, it checks if errorlevel is 1, if yes, it goes to the main menu, but right now, it doesn't call the update file, it just goes to the menu. This is my code
Main program
IF %errorlevel% EQU 1 goto begin
call updater.bat
:begin
echo MENU
Updater
set=errorlevel 1
wget (updatelink here)
call mainprogram.bat
Right now, sometimes it works, sometimes it doesn't, which leads me to believe that some command is somehow increasing the errorlevel, but the only code before the errorlevel check is
#echo off
color 0f
cls
set currentver=v0.5.6
(check code)IF %errorlevel% EQU 1 goto begin
https://code.google.com/p/flashcart-helper/source/browse/trunk/0.6/FlashcartHelperRobocopy.bat
Here is what I have right now.

Answer 1

Don't play around with errorlevel. It's an internal variable. At the start of a batch, errorlevel will be 0 because all you've done is set a local variable. This will almost always ( never say never ) succeed. Also, if errorlevel is 1, and I'm reading this correctly you also seem to have an infinite loop? From what I understand of what you've said your batches are like this:
Main
#echo off
color 0f
cls
set currentver=v0.5.6
IF %errorlevel% EQU 1 goto begin
call updater.bat
:begin
echo MENU
Updater
set=errorlevel 1
wget (updatelink here)
call mainprogram.bat
As errorlevel get's overwritten each time you do anything you're asking for trouble. Change %errorlevel% to %error% and it should solve your problems. As it's a local environment variable it should also be passed between batch files. Just be careful not to use error elsewhere.

Answer 2

Here is a solution using Dropbox Public Folders and no wget. It uses PowerShell that in on Win7+ machines.
Update the below https://dl.dropboxusercontent.com/u/12345678/ url with your own.
It auto creates a .conf file for configuration.
Set __deploy_mode to 1 for the file on dropbox so the version file can be updated but the script not accidentally executed.
#ECHO OFF
SETLOCAL ENABLEDELAYEDEXPANSION
SET time_start=%time%
SET time_choice_wait=20
SET script_ver=1.00
SET script_name=%~n0
SET server_url=https://dl.dropboxusercontent.com/u/12345678/
SET script_name_bat=%~dp0%script_name%.bat
SET script_name_cfg=%~dp0%script_name%.conf
SET script_name_latest_ver=%~dp0%script_name%.latest.ver
ECHO %script_name% v%script_ver%
ECHO %script_ver% > %script_name%.current.ver
IF NOT EXIST "%script_name_cfg%" CALL :SCRIPT_MISSING_CFG
FOR /f "delims=" %%x IN (%script_name%.conf) DO (SET "%%x")
IF %__deploy_mode% EQU 1 GOTO :EOF
IF %auto_update_compare% EQU 1 CALL :SCRIPT_COMPARE_VER
:SCRIPT_MAIN
REM =======================================
REM === EDIT BELOW THIS LINE ==
REM TODO Add main content
ECHO.
ECHO Waiting for content...
REM === EDIT ABOVE THIS LINE ==
REM =======================================
GOTO END
:SCRIPT_MISSING_CFG
ECHO Creating new %script_name%.conf file...
ECHO __deploy_mode=0 > "%script_name_cfg%"
ECHO repository_base_url=%server_url% >> "%script_name_cfg%"
ECHO auto_update_compare=1 >> "%script_name_cfg%"
ECHO auto_update_download=1 >> "%script_name_cfg%"
ECHO Update %script_name%.conf as needed, then save and close to continue.
ECHO Waiting for notepad to close...
NOTEPAD "%script_name_cfg%"
GOTO :EOF
:SCRIPT_COMPARE_VER
ECHO Please wait while script versions are compared...
Powershell -command "& { (New-Object Net.WebClient).DownloadFile('%server_url%%script_name%.current.ver', '%script_name_latest_ver%') }"
IF NOT EXIST "%script_name_latest_ver%" GOTO END
SET /p script_latest_ver= < "%script_name_latest_ver%"
IF %script_ver% EQU %script_latest_ver% CALL :SCRIPT_COMPARE_VER_SAME
IF %script_ver% NEQ %script_latest_ver% CALL :SCRIPT_COMPARE_VER_DIFF
GOTO :EOF
:SCRIPT_COMPARE_VER_SAME
ECHO Versions are both %script_name% v%script_ver%
GOTO :EOF
:SCRIPT_COMPARE_VER_DIFF
ECHO Current Version:%script_ver% ^| Server Version:%script_latest_ver%
IF %auto_update_download% EQU 1 GOTO SCRIPT_DOWNLOAD_SCRIPT
ECHO.
ECHO Would you like to download the latest %script_name% v%script_latest_ver%?
ECHO Defaulting to N in %time_choice_wait% seconds...
CHOICE /C YN /T %time_choice_wait% /D N
IF ERRORLEVEL 2 GOTO SCRIPT_DOWNLOAD_NOTHING
IF ERRORLEVEL 1 GOTO SCRIPT_DOWNLOAD_SCRIPT
IF ERRORLEVEL 0 GOTO SCRIPT_DOWNLOAD_NOTHING
:SCRIPT_DOWNLOAD_SCRIPT
ECHO Please wait while script downloads...
Powershell -command "& { (New-Object Net.WebClient).DownloadFile('%server_url%%script_name%.bat', '%script_name_bat%') }"
ECHO Script Updated to v%script_latest_ver%^^!
REM User must exit script. Current batch is stale.
GOTO :END
:SCRIPT_DOWNLOAD_NOTHING
GOTO :EOF
:END
SET time_end=%time%
ECHO.
ECHO Script started:%time_start%
ECHO Script ended :%time_end%
:END_AGAIN
pause
ECHO.
ECHO Please close this window
ECHO.
GOTO END_AGAIN

Answer 3

You can do that through these steps：
1.put two files in server,a config file, a higher version bat file which need to update; set last version num. in config file.
2.client bat should be checked update at every startup time. you can read the news version in server config file, then compared to local bat file version. if not equal, so do update, else other wise.
Do you have any problems?