(Windows) Batch File Template for Deployment with GPO and AD

@echo off
REM ==================================================================
REM  Cloudamize Windows Agent - GPO deployment script
REM  Run it as a Group Policy scheduled task (it runs as NT AUTHORITY\SYSTEM).
REM  See the Cloudamize Knowledge Base article "(Windows) Batch File
REM  Template for Deployment with GPO and AD" for setup and log details.
REM ==================================================================
setlocal EnableExtensions

REM ---- Edit these values -------------------------------------------
SET FRIENDLYNAME=Cloudamize Agent
SET SOURCEFOLDER=\\<server>\<share>\agentDeploy
SET SOURCEFILE=<cloudamizeAgent.msi>
SET TARGETFOLDER=C:\temp\Cloudamize
SET LOGFOLDER=\\<server>\<share>\agentDeploy\Logs
SET CUSTOMERKEY=<customer key from the Cloudamize Settings page>
REM ------------------------------------------------------------------

SET LOGFILE=%LOGFOLDER%\%COMPUTERNAME%.txt
SET CSV=%LOGFOLDER%\InstallationLog.csv
SET LOCALLOG=%TARGETFOLDER%\cloudamize_deploy.txt
SET MSILOG=%TARGETFOLDER%\cloudamize_msi.log

if not exist "%TARGETFOLDER%" mkdir "%TARGETFOLDER%"

for /f "delims=" %%U in ('whoami 2^>nul') do set RUNAS=%%U
call :log "Start. Domain %USERDOMAIN%, running as %RUNAS%"

REM 1. Skip servers that already have the agent
call :isInstalled
if "%INSTALLED%"=="1" goto alreadyInstalled

REM 2. Check this computer can read the installer, then copy it locally
if not exist "%SOURCEFOLDER%\%SOURCEFILE%" goto cannotRead
copy /Y "%SOURCEFOLDER%\%SOURCEFILE%" "%TARGETFOLDER%\%SOURCEFILE%" >nul 2>&1
if not exist "%TARGETFOLDER%\%SOURCEFILE%" goto copyFailed
call :log "Copied installer to %TARGETFOLDER%"

REM 3. Install silently with a verbose MSI log, without rebooting
call :log "Installing %FRIENDLYNAME%"
start "" /wait "%SystemRoot%\system32\msiexec.exe" /i "%TARGETFOLDER%\%SOURCEFILE%" CUSTOMERKEY="%CUSTOMERKEY%" /qn /norestart /l*v "%MSILOG%"
set RC=%ERRORLEVEL%
copy /Y "%MSILOG%" "%LOGFOLDER%\%COMPUTERNAME%_msi.log" >nul 2>&1

REM 4. Confirm the agent really is installed now
call :isInstalled
call :log "msiexec result %RC%, agent present afterwards %INSTALLED%"
call :csv "msiexec %RC%, installed=%INSTALLED%"
goto end

:alreadyInstalled
call :log "Agent already installed, nothing to do"
call :csv "already installed"
goto end

:cannotRead
call :log "CANNOT READ %SOURCEFOLDER%\%SOURCEFILE%. Give this domain's Domain Computers group Read on the share and the folder"
call :csv "cannot read installer"
goto end

:copyFailed
call :log "COPY FAILED to %TARGETFOLDER%"
call :csv "copy failed"
goto end

:isInstalled
set INSTALLED=0
reg query "HKLM\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall" /s /f "Cloudamize Windows Agent" /d 2>nul | findstr /i /c:"Cloudamize Windows Agent" >nul && set INSTALLED=1
reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall" /s /f "Cloudamize Windows Agent" /d 2>nul | findstr /i /c:"Cloudamize Windows Agent" >nul && set INSTALLED=1
exit /b 0

:log
>>"%LOCALLOG%" echo %DATE% %TIME% %~1
>>"%LOGFILE%" 2>nul echo %DATE% %TIME% %~1
exit /b 0

:csv
>>"%CSV%" 2>nul echo %COMPUTERNAME%,%USERDOMAIN%,%DATE%,%TIME%,%~1
exit /b 0

:end
call :log "End"
endlocal
exit /b 0