Compare the MD5 of 2 files

update.py

import socket
import subprocess

current = "/var/www/star-track/star-tracker.jar"
latest = "/opt/star-track/release/star-tracker.jar"

def get_md5(f):
    proc = subprocess.Popen(["md5sum", f],stdout=subprocess.PIPE)
    result_str = ""
    md5 = ""
    for line in iter(proc.stdout.readline, ''):
         result_str = line
    try:
         md5 = result_str.split(" ")[0]
    except:
        pass
    return md5

if __name__ == "__main__":
    machine = socket.gethostname()
    
    current_md5 = get_md5(current)
    latest_md5 = get_md5(latest)
    
    print machine, current_md5, latest_md5
    
    if current_md5 != latest_md5:
        print "CHANGE TIME: {} != {}".format(current_md5, latest_md5)
        subprocess.call(["cp", latest, current])
        subprocess.call(["supervisorctl", "restart", "prod_startrack"]