zip-to-7z.cmd

Converting a ZIP-File to a more compressed 7z-File using 7z.exe and a little script in 3 steps

• extract the archiv in a temp folder
• compress the data again with maximum compression
• comparing the old and new filesize, if the size is smaler the zip will be deleted

zip-to-7z.cmd

@echo.off
 
Rem ############################################################################
Rem # 
Rem # SCRIPT: zip-to-7z.cmd
Rem # 
Rem # converts all zip files to 7z in a directory
Rem # if the 7z file is smaler the zip file will be deleted 
Rem # 
Rem # usage: copy the file in the directory and start it
Rem # 
Rem # Version 0.0.2 Mark Wolfgruber 30.04.2010
Rem # 
Rem ############################################################################
 
  echo.%date% %time% ### START SCRIPT %0
 
set _zip=c:\Progra~1\7-Zip\7z.exe
 
if not exist %_zip% (
  echo.ERROR: 7z.exe in %_zip% not found, Script aborted
  goto end
)
 
for %%A in (*.zip) do (
  echo.%date% %time% prozessing %a ... 
  if exist %%~nA.7z del %%~nA.7z
  md %%~nA.script.tmp
  if exist %%~nA.script.tmp\. (
    cd %%~nA.script.tmp
    %_zip% e ..\%%~nA.zip
    if exist *.* (
      %_zip% a -mx9 -mmt -t7z ..\%%~nA.7z *
      cd ..
      del /s /q %%~nA\*
      rd %%~nA.script.tmp
    )
    call :verify_size %%~nA
    rem pause
    rem if exist %%~nA.7z del %%~nA.zip
  ) else (
  echo.ERROR: can not create temp subdirectory, Script aborted
  goto end
  )
)
 
goto end
 
::functions
:verify_size
  SETLOCAL ENABLEDELAYEDEXPANSION
  for %%B in (%~n1.zip) do (
    set _size[zip]=%%~zB
    set _file[zip]=%%~nxB
  )
  for %%B in (%~n1.7z) do (
    set _size[7z]=%%~zB
    set _file[7z]=%%~nxB
  )
 
  if exist %_file[zip]% (
    if exist %_file[7z]% (
      if %_size[zip]% LSS %_size[7z]% (
        echo.ALERT: zip is smaller than 7z, will not delete the ZIP-file %_file[zip]%
      ) else ( del %_file[zip]% )
    ) else ( echo.%_file[7z]% does not exist )
  ) else ( echo.%_file[zip]% does not exist )
 
  ENDLOCAL
  goto :EOF
 
:end
  echo.%date% %time% ### END SCRIPT %0
  pause
  exit 0