Subversion / VisualSVN-Server batch pre-commit hook enforcing commit message length and forbidding addition of mergeinfo. Thx to HG :)

subversion.hook.mergeinfo

setlocal enabledelayedexpansion

set REPOS=%1
set TXN=%2

set SVNLOOK="%VISUALSVN_SERVER%\bin\svnlook.exe"

SET M=

REM Concatenate all the lines in the commit message
FOR /F "usebackq delims==" %%g IN (`%SVNLOOK% log -t %TXN% %REPOS%`) DO SET M=!M!%%g

REM Make sure M is defined
SET M=0%M%

REM Here the 6 is the length we require
IF NOT "%M:~6,1%"=="" goto MESSAGE_VALIDATION_PASSED

:ERROR_TOO_SHORT
echo "Sorry, commit message must be at least 6 letters. kthxbye :) ..." >&2
goto ERROR_EXIT

:ERROR_EXIT
exit /B 1

REM All checks passed, so allow the commit.
:MESSAGE_VALIDATION_PASSED

FOR /F "usebackq tokens=1,2*" %%i IN (`%SVNLOOK% log -t %TXN% %REPOS%`) DO (
REM U - Updated a file
REM UU - Update to file AND properties 
    IF %%i==UU GOTO checkmergetracking
  IF %%i==_U GOTO checkmergetracking
)

EXIT /B 0

:checkmergetracking
%SVNLOOK% diff -t %TXN% %REPOS% | find "Added: svn:mergeinfo"
IF ERRORLEVEL 1 EXIT /B 0
ECHO "Sorry, addition of mergeinfo is not permitted on non-root folders. kthxbye :) ..." >&2
EXIT /B 1