add dependency for maven project

alt-maven-deps.py

#!/usr/bin/env python

from xml.etree import ElementTree as ET
from argparse import ArgumentParser
import os
import sys

ns = "http://maven.apache.org/POM/4.0.0"
ET.register_namespace("", ns)
namespaces = {'pom' : ns}

def makeProperty(node, value):
    builder = ET.TreeBuilder()
    builder.start(node, {})
    builder.data(value)
    return builder.end(node)

def makeDepsElement(groupId, artifactId, version):
    dept = ET.Element("dependency")
    dept.append(makeProperty("groupId", groupId))
    dept.append(makeProperty("artifactId", artifactId))
    dept.append(makeProperty("version", version))
    return dept

def check_deps(root, groupId, artifactId, version):
    deps  = root.find('pom:dependencies', namespaces=namespaces)
    if deps is not None:
        has_dep = False
        for d in deps:
            artifact_id = d.find("pom:artifactId", namespaces=namespaces)
            if artifact_id.text.startswith(artifactId):
                has_dep = True
        if not has_dep:
            deps.append(makeDepsElement(groupId, artifactId, version))
    else:
        deps = ET.Element("dependencies")
        deps.append(makeDepsElement(groupId, artifactId, version))
        root.append(deps)

def set_args():
    parser = ArgumentParser()
    parser.add_argument("pomfile", help="pom.xml file")
    parser.add_argument("-g","--group-id", help="groupId", required=True, dest="groupId")
    parser.add_argument("-a","--artifact-id", help="artifactId", required=True, dest="artifactId")
    parser.add_argument("-v","--verion", help="version", required=True, dest="version")
    args = parser.parse_args()
    return args

if __name__ == "__main__":
    opt = set_args()
    if os.path.exists(opt.pomfile):
        tree = ET.parse(opt.pomfile)
        root = tree.getroot()
        check_deps(root, opt.groupId, opt.artifactId, opt.version)
        tree.write(opt.pomfile, encoding="utf-8", xml_declaration=True)