如果要求提交版本库时必须写日志，设置如下

VisualSVN Server下右键项目 “所有任务”》“Manage Hooks” 》选中Pre-commit hook然后edit编辑，添加如下代码

@echo off
::    
:: Stops commits that have empty log messages.
::

@echo off

set svnlook="C:\Program Files\VisualSVN Server\bin\svnlook.exe"  
setlocal

rem Subversion sends through the path to the repository and transaction id
set REPOS=%1
set TXN=%2

rem check for an empty log message
%svnlook% log %REPOS% -t %TXN% | findstr . > nul
if %errorlevel% gtr 0 (goto err) else exit 0

:err
echo. 1>&2
echo Your commit has been blocked because you didn't give any log message 1>&2
echo Please write a log message describing the purpose of your changes and 1>&2
echo then try committing again. -- Thank you 1>&2
exit 1