Support python 3

bin/github-backup

@@ -16,11 +16,25 @@ import select
 import subprocess
 import sys
 import time
-import urlparse
-import urllib
-import urllib2
+try:
+    # python 3
+    from urllib.parse import urlparse
+    from urllib.parse import quote as urlquote
+    from urllib.parse import urlencode
+    from urllib.error import HTTPError, URLError
+    from urllib.request import urlopen
+    from urllib.request import Request
+except ImportError:
+    # python 2
+    from urlparse import urlparse
+    from urllib import quote as urlquote
+    from urllib import urlencode
+    from urllib2 import HTTPError, URLError
+    from urllib2 import urlopen
+    from urllib2 import Request
 
-from github_backup import __version__
+__version__='asdf'
+# from github_backup import __version__
 
 FNULL = open(os.devnull, 'w')
 
@@ -80,8 +94,8 @@ def logging_subprocess(popenargs,
     rc = child.wait()
 
     if rc != 0:
-        print(u'{} returned {}:'.format(popenargs[0], rc), file=sys.stderr)
-        print('\t', u' '.join(popenargs), file=sys.stderr)
+        print('{} returned {}:'.format(popenargs[0], rc), file=sys.stderr)
+        print('\t', ' '.join(popenargs), file=sys.stderr)
 
     return rc
 
@@ -97,7 +111,7 @@ def mkdir_p(*args):
                 raise
 
 def mask_password(url, secret='*****'):
-    parsed = urlparse.urlparse(url)
+    parsed = urlparse(url)
 
     if not parsed.password:
         return url
@@ -246,7 +260,7 @@ def get_auth(args, encode=True):
         if encode:
             password = args.password
         else:
-            password = urllib.quote(args.password)
+            password = urlquote(args.password)
         auth = args.username + ':' + password
     elif args.password:
         log_error('You must specify a username for basic auth')
@@ -344,11 +358,11 @@ def _get_response(request, auth, template):
     while True:
         should_continue = False
         try:
-            r = urllib2.urlopen(request)
-        except urllib2.HTTPError as exc:
+            r = urlopen(request)
+        except HTTPError as exc:
             errors, should_continue = _request_http_error(exc, auth, errors)  # noqa
             r = exc
-        except urllib2.URLError:
+        except URLError:
             should_continue = _request_url_error(template, retry_timeout)
             if not should_continue:
                 raise
@@ -361,12 +375,12 @@ def _get_response(request, auth, template):
 
 
 def _construct_request(per_page, page, query_args, template, auth):
-    querystring = urllib.urlencode(dict({
+    querystring = urlencode(dict(list({
         'per_page': per_page,
         'page': page
-    }.items() + query_args.items()))
+    }.items()) + list(query_args.items())))
 
-    request = urllib2.Request(template + '?' + querystring)
+    request = Request(template + '?' + querystring)
     if auth is not None:
         request.add_header('Authorization', 'Basic ' + auth)
     return request
@@ -551,10 +565,10 @@ def backup_issues(args, repo_cwd, repository, repos_template):
 
     if issues_skipped:
         issues_skipped_message = ' (skipped {0} pull requests)'.format(issues_skipped)
-    log_info('Saving {0} issues to disk{1}'.format(len(issues.keys()), issues_skipped_message))
+    log_info('Saving {0} issues to disk{1}'.format(len(list(issues.keys())), issues_skipped_message))
     comments_template = _issue_template + '/{0}/comments'
     events_template = _issue_template + '/{0}/events'
-    for number, issue in issues.iteritems():
+    for number, issue in list(issues.items()):
         if args.include_issue_comments or args.include_everything:
             template = comments_template.format(number)
             issues[number]['comment_data'] = retrieve_data(args, template)
@@ -597,10 +611,10 @@ def backup_pulls(args, repo_cwd, repository, repos_template):
             if not args.since or pull['updated_at'] >= args.since:
                 pulls[pull['number']] = pull
 
-    log_info('Saving {0} pull requests to disk'.format(len(pulls.keys())))
+    log_info('Saving {0} pull requests to disk'.format(len(list(pulls.keys()))))
     comments_template = _pulls_template + '/{0}/comments'
     commits_template = _pulls_template + '/{0}/commits'
-    for number, pull in pulls.iteritems():
+    for number, pull in list(pulls.items()):
         if args.include_pull_comments or args.include_everything:
             template = comments_template.format(number)
             pulls[number]['comment_data'] = retrieve_data(args, template)
@@ -634,8 +648,8 @@ def backup_milestones(args, repo_cwd, repository, repos_template):
     for milestone in _milestones:
         milestones[milestone['number']] = milestone
 
-    log_info('Saving {0} milestones to disk'.format(len(milestones.keys())))
-    for number, milestone in milestones.iteritems():
+    log_info('Saving {0} milestones to disk'.format(len(list(milestones.keys()))))
+    for number, milestone in list(milestones.items()):
         milestone_file = '{0}/{1}.json'.format(milestone_cwd, number)
         with codecs.open(milestone_file, 'w', encoding='utf-8') as f:
             json_dump(milestone, f)