python 备份 svn 服务器文件脚本

（一）场景

            就是做一备份文件的脚本，功能很简单，备份完成，发邮件通知，每天定时运行，并且自动删除前一周的数据（注：目前只有备份，和发邮件，其他的功能陆续加上）

（二）代码

# -*- coding : utf-8 -*-
import os
import time
import tarfile
import string
import smtplib
import email
logfile = "/usr/svnback/log/svnbak.log"
bakdir = "/usr/svnback"
svndir = "/usr/svncode"
destdir = bakdir+"/"+time.strftime("%Y-%m-%d")
today = time.strftime("%Y-%m-%d %H:%M:%S")
def get_time():
    now = time.ctime()
    parsed = time.strptime(now)
    return time.strftime("%Y-%m-%d %H:%M:%S")
def write_log(time,info):

open_log = open(logfile,'a+')

open_log.write(time + ":" +info +"\n")

open_log.close()
def compress_svn(destdir):

tar = tarfile.open(destdir+'.bz2','w|bz2')

tar.add(svndir)

write_log(today,"compress_svn")

tar.close()

sendmail(today+'svncode has bak')
def sendmail(content):

mail_host ='smtp.163.com'

addrfrom = 'xxx@163.com'

addrto = 'xxx@qq.com'

msg = "To:xxxx@qq.com\r\nFrom:xxx@163.com\r\nSubject:svn backup problem\r\nDate:" + email.Utils.formatdate()+"\r\n\r\n" + content + "\r\n"

svr = smtplib.SMTP()

svr.connect(mail_host)

svr.login('username','pwd')

svr.sendmail(addrfrom,addrto,msg)

svr.close()
if name=="main":

time = get_time()

write_log(time,"start back up!!")

if os.path.exists(destdir):

write_log(time,"back already exists!")

else:

compress_svn(destdir)