Add user-agent and version

Send the gertty version in the user-agent header.  Also add a
--version command argument.

Change-Id: I83a3330550497d3d45d5b34608058ece66590d4b

gertty/app.py

@@ -357,6 +357,10 @@ class App(object):
         self.log.debug("Open URL %s" % url)
         webbrowser.open_new_tab(url)
 
+def version():
+    from gertty.version import version_info as gertty_version_info
+    return "Gertty version: %s" % gertty_version_info.version_string()
+
 def main():
     parser = argparse.ArgumentParser(
         description='Console client for Gerrit Code Review.')
@@ -367,6 +371,9 @@ def main():
     parser.add_argument('--fetch-missing-refs', dest='fetch_missing_refs',
                         action='store_true',
                         help='fetch any refs missing from local repos')
+    parser.add_argument('--version', dest='version', action='version',
+                        version=version(),
+                        help='show zuul version')
     parser.add_argument('-p', dest='palette', default='default',
                         help='Color palette to use')
     parser.add_argument('-k', dest='keymap', default='default',

gertty/sync.py

@@ -30,6 +30,9 @@ try:
 except:
     pass
 import requests
+import requests.utils
+
+import gertty.version
 
 HIGH_PRIORITY=0
 NORMAL_PRIORITY=1
@@ -563,6 +566,8 @@ class UploadReviewTask(Task):
 
 class Sync(object):
     def __init__(self, app):
+        self.user_agent = 'Gertty/%s %s' % (gertty.version.version_info.version_string(),
+                                            requests.utils.default_user_agent())
         self.offline = False
         self.app = app
         self.log = logging.getLogger('gertty.sync')
@@ -632,7 +637,8 @@ class Sync(object):
                          verify=self.app.config.verify_ssl,
                          auth=self.auth,
                          headers = {'Accept': 'application/json',
-                                    'Accept-Encoding': 'gzip'})
+                                    'Accept-Encoding': 'gzip',
+                                    'User-Agent': self.user_agent})
         self.log.debug('Received: %s' % (r.text,))
         ret = json.loads(r.text[4:])
         return ret
@@ -644,7 +650,8 @@ class Sync(object):
         r = self.session.post(url, data=json.dumps(data).encode('utf8'),
                           verify=self.app.config.verify_ssl,
                           auth=self.auth,
-                          headers = {'Content-Type': 'application/json;charset=UTF-8'})
+                          headers = {'Content-Type': 'application/json;charset=UTF-8',
+                                     'User-Agent': self.user_agent})
         self.log.debug('Received: %s' % (r.text,))
 
     def syncSubscribedProjects(self):

gertty/version.py

@@ -0,0 +1,17 @@
+# Copyright 2014 Hewlett-Packard Development Company, L.P.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import pbr.version
+
+version_info = pbr.version.VersionInfo('gertty')