自動從svn log中逐一分析是否修改過某字元串

剛才我在n個月前待過的一個組的同學問我的某個檔案的某幾行代碼是不是我送出的，為什麼要那麼寫。在感慨歲月不饒人記憶力急劇衰退的同時，我也發出了這樣的疑問，這玩意是我造的麼，怎麼看都不像啊。看着這個檔案上百次的svn送出log，一陣暈，這要找到，得等到新瑪雅曆了。。。我決定還是來段腳本吧。

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

'''
先取最新100個記錄，如果還沒找到，從上一次批量查詢裡最老版本号,繼續增量往前找。
'''
import os
import sys
import readline

svnpath = "http://svn.xx.com/xxxxx/../xx.cc";
step=100
pattern = "pthread_mutex_lock"

def thankyou():
  print "thank you, bye."
  sys.exit()

def seek(_vers, _filepath, _pattern):
  for i in range(len(_vers)-1):
    content = ""
    isfound = False
    cmd = "svn diff -r%s:%s %s" % (_vers[i+1], _vers[i], _filepath)
    for line in os.popen(cmd) :
      content += line
      if line.find(_pattern)>=0 :
        isfound = True
    if isfound:
      print content
      while True :
        try:
          cmd = raw_input("Continue?(Y/N)")
        except EOFError:
          thankyou()
        except KeyboardInterrupt:
          thankyou()
        if cmd.upper() == 'Y':
          break
        else:
          thankyou()

def getvers(_ver, _step, _filepath):
  _vers = []
  if _ver:
    cmd = "svn log --quiet -r%d:1 --limit %d %s | grep -o -e 'r[0-9]\+'" % (_ver, _step, _filepath)
  else:
    cmd = "svn log --quiet --limit %d %s | grep -o -e 'r[0-9]\+'" % (_step, _filepath)
  for line in os.popen(cmd):
    _vers.append(line.strip()[1:])
  return _vers

if __name__ == "__main__":
  lastver = 1
  while lastver:
    lastver -= 1
    versions = getvers(lastver, step, svnpath)
    lens = len(versions)
    if lens :
      seek(versions, svnpath, pattern)
      if lens == step:
        lastver = int(versions[lens-1])+1
      else:
        lastver = 0