謝謝您的建議,但人永遠是最難控管的因素,所以我找到了方法,就是用hook裡的pre-commit,在user commit之前就有些條件可以先判斷能否上傳:

#!/bin/sh
REPOS="$1"
TXN="$2"
#此處更改大小限制，這裏是5M
MAX_SIZE=50000000
#此處增加限制文件後綴名
FILTER='.(輸入附檔名)$'

SVNLOOK=/usr/bin/svnlook

LOGMSG=$SVNLOOK log -t "$TXN" "$REPOS" | wc -c

if [ "$LOGMSG" -lt 0 ]
then
echo "Please enter a message with more than 0 words" 1>&2
exit 1
fi

files=$($SVNLOOK changed -t $TXN $REPOS |cut -d " " -f 4-)

rc=0

echo "$files" | while read f;
do
if echo $f|tr A-Z a-z|grep -Eq $FILTER;
then
echo "do not upload type of ($FILTER) file" >&2
exit 1;
fi

filesize=$($SVNLOOK cat -t "$TXN" "$REPOS" "$f" | wc -c)

if [ "$filesize" -gt "$MAX_SIZE" ]
then
echo "your file is bigger than 5M (must be less than or equal to $MAX_SIZE bytes)" >&2
exit 1
fi
done