一、摘要
场景：
在这次开发项目过程中，团队中总是有人忘记添加注释。
问题：
1：其他成员不知道你提交是什么代码, 给回滚操作带来很多不必要的麻烦。
2：这个工作需要有一个人天天提醒大家在提交代码的时候加入注释。
3：这个是重复的，定时的，固定的 工作。
思路：
1：我们可以把这项工作交给电脑来完成岂不是更好。
2：提交代码的时候电脑自动提醒。
3：代码注释字数限制。以下为最少5个字为例子。
二、本文大纲
a、摘要。
b、本文大纲。
c、第一步创建SVN版本库。
d、第二步 pre-commit.tmpl 修改前代码：。
e、第三步 pre-commit.bat 修改后代码：（Windows）。
f、第二个方法，直接在客服端设置。
j、第四步 效果图。
三、第一步创建SVN版本库
在 SVNDataBase文件夹上建立版本库SVNDataBase文件夹必须是空的这个SVN会提示的。
在hooks文件夹下找到
用户提交代码的动作，对应的是pre-commit。因此，可以修改pre-commit.tmpl文件。
文 件名修改为pre-commit, Windows下可以修改为pre-commit.bat。这样可以让系统知道该文件时可执行文件。
四、第二步 pre-commit.tmpl 修改前代码
#!/bin/sh
# PRE-COMMIT HOOK
#
# 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.
#
# Each lock token line consists of a URI-escaped path, followed
# by the separator character ‘|‘, followed by the lock token string,
# followed by a newline.
#
# The default working directory for the invocation is undefined, so
# the program should set one explicitly if it cares.
#
# If the hook program exits with success, the txn is committed; but
# if it exits with failure (non-zero), the txn is aborted, no commit
# takes place, and STDERR is returned to the client. The hook
# program can use the ‘svnlook‘ utility to help it examine the txn.
#
# On a Unix system, the normal procedure is to have ‘pre-commit‘
# invoke other programs to do the real work, though it may do the
# work itself too.
#
# *** NOTE: THE HOOK PROGRAM MUST NOT MODIFY THE TXN, EXCEPT ***
# *** FOR REVISION PROPERTIES (like svn:log or svn:author). ***
#
# This is why we recommend using the read-only ‘svnlook‘ utility.
# In the future, Subversion may enforce the rule that pre-commit
# hooks should not modify the versioned data in txns, or else come
# up with a mechanism to make it safe to do so (by informing the
# committing client of the changes). However, right now neither
# mechanism is implemented, so hook writers just have to be careful.
#
# Note that ‘pre-commit‘ must be executable by the user(s) who will
# invoke it (typically the user httpd runs as), and that user must
# have filesystem-level permission to access the repository.
#
# On a Windows system, you should name the hook program
# ‘pre-commit.bat‘ or ‘pre-commit.exe‘,
# but the basic idea is the same.
#
# The hook program typically does not inherit the environment of
# its parent process. For example, a common problem is for the
# PATH environment variable to not be set to its usual value, so
# that subprograms fail to launch unless invoked via absolute path.
# If you‘re having unexpected problems with a hook program, the
# culprit may be unusual (or missing) environment variables.
#
# Here is an example hook script, for a Unix /bin/sh interpreter.
# For more examples and pre-written hooks, see those in
# the Subversion repository at
# http://svn.apache.org/repos/asf/subversion/trunk/tools/hook-scripts/ and
# http://svn.apache.org/repos/asf/subversion/trunk/contrib/hook-scripts/
REPOS="$1"
TXN="$2"
# Make sure that the log message contains some text.
SVNLOOK=/usr/local/bin/svnlook
SVNLOOKlog−t"TXN" "$REPOS" | \
grep "[a-zA-Z0-9]" > /dev/null || exit 1
# Check that the author of this commit has the rights to perform
# the commit on the files and directories being modified.
commit-access-control.pl "REPOS""TXN" commit-access-control.cfg || exit 1
# All checks passed, so allow the commit.
exit 0
五、第三步 pre-commit.bat 修改后代码 ( Windows )
把pre-commit文件的内容清楚复制下面的代码到pre-commit文件中：
@echo off
setlocal
set REPOS=%1
set TXN=%2
rem check that logmessage contains at least 10 characters
rem .....代表5个字符
svnlook log "%REPOS%" -t "%TXN%" | findstr ".........." > nul
if %errorlevel% gtr 0 goto err
exit 0
:err
echo Empty log message not allowed. Commit aborted! 1>&2
exit 1
如下：
给pre-commit添加可执行权限：
chmod +x pre-commit
六、第二个方法，直接在客服端设置
通过TortoiseSvn，在本地副本中，选择项目，右键选择TortoiseSvn，选择属性，添加tsvn:logminsize，将值限定为10，添加了logminsize属性后，要将本地工作副本commit一下，才能生效。如下图：
七、第五步 效果图
小于5个字符 提示如下：
修改注释目前在工作上还没有遇到，嘿嘿。就先不研究啦。
