svn提交时强制添加注释

    负责前端开发的同事提出需求，svn提交时必须添加注释，否则有可能不知道代码是谁提交的。

    搭建svn服务器时，用的是CollabNetSubversionEdge。添加用户，管理工程权限都挺方便。让某个工程在提交时添加注释，需要在svn的hooks目录下，新建一个pre-commit的文件并给它可执行权限。

    代码如下：

#!/bin/bash

REPOS="$1"

TXN="$2"

SVNLOOK=/local/csvn/bin/svnlook

LOGMSG=$($SVNLOOK log -t "$TXN" "$REPOS" | grep "[a-zA-A0-9]" | wc -c)

if [ "$LOGMSG" -lt 5 ]; then

        echo -e "\n [Commit]log message cann't be empty! YOU MUST input more than 10 chars as comment" 1>&2

exit 1

fi

根据系统自带的pre-commit.teml中的内容弄清楚这段脚本的含义：

The pre-commit hook is invoked before a Subversion txn is

# committed.  Subversion runs this hook by invoking a program

# (script, executable, binary, etc.) named 'pre-commit' (for which

# this file is a template), with the following ordered arguments:

#

#   [1] REPOS-PATH   (the path to this repository)

#   [2] TXN-NAME     (the name of the txn about to be committed)

#

#   [STDIN] LOCK-TOKENS ** the lock tokens are passed via STDIN.

#

#   If STDIN contains the line "LOCK-TOKENS:\n" (the "\n" denotes a

#   single newline), the lines following it are the lock tokens for

#   this commit.  The end of the list is marked by a line containing

#   only a newline character.

脚本命令解释：

LOGMSG=$($SVNLOOK log -t “$TXN” “$REPOS” | grep “[a-zA-Z0-9]” | wc -c)
将提交的日志信息作为便来那个输入之后，将grep英文和数字的结果作为变量

if [ "$LOGMSG" -lt 10 ]; 传入变量来判断变量长度是否小于10
-eq 等于号  -gt 大于号   -lt小于号

1. echo 错误提示信息的时候必须重定向到 stderr ，即 1>&2
2. pre-commit 文件拷贝到 hooks 目录之后，需要执行 chmod 755 pre-commit ，给 pre-commit 文件增加可执行权限。