程式版本控管與管理流程之靠腰

很多IT 部門的軟體變更管理，會有資料管制人員負責去協助變更管理，其目的是避免程式開發人員自行變更而造成混亂，說明一下變更流程大概如下：

1.提出變更申請目的
2.AP 頭頭同意
3.附上變更軟體資料、測試報告等等。交付資料管制人員處理。
4.資料管制人員，檢查申請人所付資料是否符合?
要進入正式區軟體庫中的檔案是否與申請項目相同

要討論的是如何確認申請人所附檔案是正確的(第 4 點)：
1.申請人比對正式區軟體庫內容並產生差異檔 - DiffData1
2.資料管制人員依申請人申請，比對正式區軟體庫內容並產生差異檔 -DiffData2
3.比對DiffData1 與DiffData2 內容是否一致

問題來了，Source Code 是可以這麼做，但若是非Source Code (如COM/DLL) 要如何管理呢?
subversion 的diff 檔比不出來呀，解法是產生檔案的checksum 去證明是兩者一致，
如你去網路Download 檔案，也都是會看到檔案提供者在網站公告chksum ，讓你知道你下載的檔案是正確未被篡改過，要產生Checksum 有很多種方法，普遍是用MD5，那只要可以利用Subversion 找出差異檔並產生每個檔案的MD5 並產生報表，申請人與資料管制人員都利用這種方式進行變更管裡，問題就解決了。

口說無憑，程式碼如下

#!/usr/bin/env python
# -*- coding: utf-8 -*-


"""
   SVNMD5.EXE.
   Used to compare working copy and Repository  ,genereate compare report.
   It's 100 %  Python :)
   I use Python 2.6.4 , py2exe,pysvn 1.7.2 to create SVNMD5.EXE
   Diff report format : Unified diff format
"""

__author__ =  ' Ray Yeh <yeh_ray@hotmail.com>'
__version__ = '1.0'
__licence__ = 'GPL V3'


import sys
import os
import re
from datetime import datetime
import pysvn
import codecs
import hashlib


def Usage():
   print """Usage: """ + sys.argv[0] + """ PATH  >>  Report_file
Usage sample1 : SVNMD5.exe d:\project >>  d:\svnreport.txt   --> Output report at d:\svnreport.txt
Usage sample 2: SVNMD5.exe d:\project   --> Output at screen
Batch compare working copy with repository  and generate report to PATH

by  Ray Yeh    version 1.0
   """
   sys.exit(1)

#------------------------------- Process the options -------------------------
if len(sys.argv)==2 :
   workingdir=sys.argv[1]   
else:
   Usage()

try:
   os.chdir(workingdir)
except OSError:
   print "Cannot change dir to " + workingdir
   Usage()
#------------------------------- Find out what has changed -------------------
client = pysvn.Client()
changes = client.status(workingdir)

#print 'files to be added:'
addedlist =[f.path for f in changes if f.text_status == pysvn.wc_status_kind.added]
#print 'files to be removed:'
deletedlist=[f.path for f in changes if f.text_status == pysvn.wc_status_kind.deleted]
#print 'files that have changed:'
modifiedlist=[f.path for f in changes if f.text_status == pysvn.wc_status_kind.modified]
#print 'files with merge conflicts:'
conflictedlist=[f.path for f in changes if f.text_status == pysvn.wc_status_kind.conflicted]
#print 'unversioned files:'
unversionedlist=[f.path for f in changes if f.text_status == pysvn.wc_status_kind.unversioned]
#print 'missing files:'
missinglist=[f.path for f in changes if f.text_status == pysvn.wc_status_kind.missing]

dt=datetime.now()

print "SVN compare run at:"+ dt.strftime("%A, %d. %B %Y %I:%M%p")
print "Compare Woking directory:"+workingdir + "\n"


str_1 =u"================== 產生 Compare 資料開始 ================="
str_2 =u"================== 產生 Compare 資料結束 ================="
print  str_1.encode('big5_tw')
#  Added  files
for item in addedlist:
    buff =""
    file=open(item, 'rb')
    buff=file.read()
    file.close()
    m=hashlib.md5()
    m.update(buff)
    print item+ " =>MD5 Chksum:" + m.hexdigest()
    
#Modified files
for item in modifiedlist:
    buff =""
    file=open(item, 'rb')
    buff=file.read()
    file.close()
    m=hashlib.md5()
    m.update(buff)
    print item+ " =>MD5 Chksum:" + m.hexdigest()
print  str_2.encode('big5_tw')

#Unversionedl files
for item in unversionedlist:
    buff =""
    file=open(item, 'rb')
    buff=file.read()
    file.close()
    m=hashlib.md5()
    m.update(buff)
    print item+ " =>MD5 Chksum:" + m.hexdigest()

deletedcount=0
modifiedcount=0
missingcount=0
addedcount=0
unversionedcount=0

i=0
for i in addedlist:
    addedcount +=1   
i=0
for i in modifiedlist:
    modifiedcount +=1
i=0
for i in missinglist:
    missingcount+=1   
i=0
for i in unversionedlist:
    unversionedcount +=1

str_3=u'比對目錄路徑:'
str_4=u'比對檔案清單:'
str_5=u'新增   '
str_6=u'差異   '
str_7=u'刪除   '
str_8=u'未納版'
print str_3.encode('big5_tw') 
print str_4.encode('big5_tw')
print str_5.encode('big5_tw')+'%d folders/files:\n%s' %(addedcount, addedlist)
print str_6.encode('big5_tw')+'%d folders/files:\n%s' %(modifiedcount, modifiedlist)
print str_7.encode('big5_tw')+'%d folders/files:\n%s' %(missingcount, missinglist)
print str_8.encode('big5_tw')+'%d folders/files:\n%s' %(unversionedcount,unversionedlist)
print "=========================================================="