#!/usr/bin/python
#
# python script to export course from CMS to github
#
# Usage:   python cms_export_to_github <course_location> <username> <github_ssl_url> [<repo_dir>]
#

import os, sys, string, re
import datetime

DIR = "/mnt/data_export"

#-----------------------------------------------------------------------------
# usage

def usage():
    print "Usage:   python cms_export_to_github <course_location> <username> <github_ssl_url> [<repo_dir>]"

#-----------------------------------------------------------------------------

try:
    course_loc = sys.argv.pop(1)
    username = sys.argv.pop(1)
    repo = sys.argv.pop(1)
except:
    usage()
    sys.exit(0)

if course_loc.startswith('i4x://'):
    course_loc = course_loc[6:]

m = re.match('git@[^ ]+\.git', repo)
if not m:
    print "Oops, not a git ssh url?"
    print repo
    print "Expecting something like git@github.com:mitocw/edx4edx_lite.git"
    sys.exit(-1)

if len(sys.argv)>1:
    rdir = sys.argv.pop(1)
    rdir = os.path.basename(rdir)
else:
    rdir = repo.rsplit('/',1)[-1].rsplit('.git',1)[0]
print "rdir = %s" % rdir

rdirp = '%s/%s' % (DIR, rdir)
if os.path.exists(rdirp):
    print "directory already exists, doing a git pull instead of git clone"
    cmd = 'cd %s/%s; git pull' % (DIR, rdir)
else:
    cmd = 'cd %s; git clone "%s"' % (DIR, repo)

print cmd
ret_git = os.popen(cmd).read()
print ret_git

if not os.path.exists('%s/%s' % (DIR, rdir)):
    print "git clone failed!"
    sys.exit(-1)

#-----------------------------------------------------------------------------
# export course 

cmd = "./DJANGO-ADMIN-CMS export %s %s" % (course_loc, rdirp)
print cmd
ret_export = os.popen(cmd).read()
print ret_export

#-----------------------------------------------------------------------------
# push to github

dt = datetime.datetime.now()
cmd = 'cd %s; git add .; git commit -a -m "(%s) Export %s"; git push' % (rdirp, username, dt)
print cmd
ret_push = os.popen(cmd).read()
print ret_push