python 复制lib下的jar到maven的仓库中

项目有POM.xml文件，有好多jar包，需要把用到的jar包，解析pom.xml，找到需要复制的jar包，复制到另一个maven仓库里去
这个脚本有问题，会丢失依赖关系
脚本：

#! python
#coding:utf-8
#http://powertech.iteye.com/
import sys
import os
import shutil
import xml.dom.minidom as xml

repository = 'E:/python/repository'

lib = 'E:/target/dependency'

pom = 'E:/python/pom.xml'




'''
中文打印函数
'''
def out(str):
	print str.decode('UTF-8').encode('GBK')


'''
	根据group id 创建文件夹路径
'''
def groupPath(group,artifactId,version):

	group = group.replace('.','/')
	
	if repository[-1]!='/' :
		group = repository+'/'+group
	else:
		group = repository+group
	
	group = group+'/'+artifactId+'/'+version
	
	exists = os.path.exists(group)
	
	if not exists :
		os.makedirs(group)
		
	return group

'''
获取某XML节点下，子节点的值
'''
def nodeVal(element,name):
	node = element.getElementsByTagName(name)
	if len(node)>0:
		return element.getElementsByTagName(name)[0].firstChild.nodeValue
	else:
		return ''
	


'''
将${jdbc.driver.groupId}类型的引用，替换为实际值
'''
def prop(element,name):
		if len(name)==0:
			return ''
			
		if name[0]=='$':
			name = name[2:len(name)-1]
			name = nodeVal(element,name)
		return name

def cpjar():
	dom = xml.parse(pom)
	project = dom.documentElement
	dependencies = project.getElementsByTagName('dependency')
	i=0
	for dependency in dependencies:
		
		groupId =  nodeVal(dependency,'groupId')
		groupId = prop(project,groupId)
		
		artifactId =  nodeVal(dependency,'artifactId')
		artifactId = prop(project,artifactId)
		
		version =  nodeVal(dependency,'version')
		version = prop(project,version)
		
		classifier = nodeVal(dependency,'classifier')
		classifier = prop(project,classifier)
		
		gp = groupPath(groupId,artifactId,version)
		out('create directory:'+gp)
		if len(classifier)>0:
			jar = artifactId+'-'+version+'-'+classifier+'.jar'
		else:
			jar = artifactId+'-'+version+'.jar'
		src = lib+'/'+jar
		dst = gp+'/'+jar
		out('copy from:'+src)
		out('copy to:'+dst)
		print('\n')
		shutil.copy(src,dst)
		i+=1
	print('%d jar files copied!' %(i))
	print('copy over!')


cpjar()