downloads artifact from maven repository and notifies via webhook

download_and_notify.py

#!/usr/bin/env python3

import xml.etree.ElementTree as ET
import urllib.request
import argparse
import os

# argparse
parser = argparse.ArgumentParser()
parser.add_argument("-g", "--group", type = str, help = "artifact's group id", required = True)
parser.add_argument("-a", "--artifact", type = str, help = "artifact's id", required = True)
parser.add_argument("-v", "--version", type = str, help = "artifact's version", required = True)
parser.add_argument("-u", "--url", type = str, help = "maven repository url", required = True)
parser.add_argument("-d", "--dest", type = str, help = "path to deploy artifact", required = True)
args = parser.parse_args()

# slack integration
webhook = os.environ['NOTIFYHOOK']

def __getjarver__(url):
    # open connection to maven repository
    with urllib.request.urlopen(url + "maven-metadata.xml") as data:
        tree = ET.fromstring(data.read().decode("utf-8"))
    # get java file version
    timestamp = tree.findall("./versioning/snapshot/timestamp")[0].text
    build_num = tree.findall("./versioning/snapshot/buildNumber")[0].text
    jar_ver = "-" + timestamp + "-" + build_num
    return jar_ver

def sendnotification(artifact_aid, webhook):
    user = os.getlogin().encode()
    host = os.uname().nodename.encode()
    artifact = artifact_aid.encode()
    data = b'payload={\"channel\": \"#deployment\", \"username\": \"' + user + b'\" , \"text\": \"This is deployment of ' + artifact + b' to ' + host + b' by ' + user + b'.\", \"icon_emoji\": \":ghost:\"}'
    req = urllib.request.Request(webhook, data=data, method='POST')
    with urllib.request.urlopen(req) as f:
        pass
    return None

def downloadjar(url, artifact_gid, artifact_aid, artifact_ver, dest):
    # url variable
    url = url + "/" + "/".join((artifact_gid.replace(".", "/"), artifact_aid, artifact_ver)) + "/"
    # get jar version. there is convention that snapshot of an artifact looks like 9.9.9-SNAPSHOT
    artifact_ver = artifact_ver.split('-')
    jar_ver = artifact_ver[0] + ((len(artifact_ver) > 1) and __getjarver__(url) or '')
    # open connection to maven repository
    with urllib.request.urlopen(url + artifact_aid + "-" + jar_ver + ".jar") as jar:
        with open(dest + "/" + artifact_aid + ".jar", 'wb') as fname:
            fname.write(jar.read())
    return None

downloadjar(args.url, args.group, args.artifact, args.version, args.dest)
sendnotification(args.artifact, webhook)