get_changeset.py

#!/usr/bin/python

import sys, getopt
import subprocess

def main(argv):
   inputfile = ''
   outputfile = ''
   try:
      opts, args = getopt.getopt(argv,"h",["help"])
   except getopt.GetoptError:
      print 'test.py <url> [outputfile]'
      sys.exit(2)
   for opt, arg in opts:
      if opt == '-h':
         print 'test.py <url> [outputfile]'
         sys.exit()
   if not args:
      print 'test.py <url> [outputfile]'
   url = args[0]
   p1 = subprocess.Popen(["http", url], stdout=subprocess.PIPE)
   p2 = subprocess.Popen(["gunzip", "-c"], stdin=p1.stdout, stdout=subprocess.PIPE)
   if len(args) > 1:
   	  outputfilename = args[1]
   	  with open(outputfilename, 'w') as outputfile:
   	     p3 = subprocess.Popen(["jq", "."], stdin=p2.stdout, stdout=outputfile)
   else:
	  p3 = subprocess.Popen(["jq", "."], stdin=p2.stdout)
   p1.wait()

if __name__ == "__main__":
   main(sys.argv[1:])