# cd /svnroot/test/hooks
# cp pre-commit.tmpl pre-commit
# vi pre-commit
在末尾删除原来的，添加上以下参数
REPOS="$1"
TXN="$2"
SVNLOOK=/usr/bin/svnlook
# check that logmessage contains at least 5 alphanumeric characters
LOGMSG=`$SVNLOOK log -t "$TXN" "$REPOS" | grep "[a-zA-Z0-9]" | wc -c`
if [ "$LOGMSG" -lt 5 ];
then
  echo -e "\nEmpty log message not allowed. Commit aborted!" 1>&2
  exit 1
fi
//[ "$LOGMSG" -lt 5 ] -lt 5这个5是至少为5个字符，请注意。
# chmod a+x pre-commit   //添加可执行权限给pre-commit