Merge "Fix AttributeError when can not connect to Gerrit"

git-review.1

@@ -370,6 +370,8 @@ Particular patchset cannot be fetched from the remote git repository.
 Specified patchset number not found in the changeset.
 .It 39
 Invalid patchsets for comparison.
+.It 40
+Connection to Gerrit was closed.
 .It 64
 Cannot checkout downloaded patchset into the new branch.
 .It 65

git_review/cmd.py

@@ -393,8 +393,9 @@ def add_remote(scheme, hostname, port, project, remote, usepushurl):
         remote_url = make_remote_url(scheme, username, hostname, port, project)
         print("Trying again with %s" % remote_url)
         if not test_remote_url(remote_url):
-            raise GitReviewException("Could not connect to gerrit at "
-                                     "%s" % remote_url)
+            raise GerritConnectionException(
+                "Could not connect to gerrit at %s" % remote_url
+            )
         asked_for_username = True
 
     if usepushurl:
@@ -1062,6 +1063,11 @@ class PatchSetNotFound(ChangeSetException):
     EXIT_CODE = 38
 
 
+class GerritConnectionException(GitReviewException):
+    """Problem to establish connection to gerrit."""
+    EXIT_CODE = 40
+
+
 class CheckoutNewBranchFailed(CommandFailed):
     "Cannot checkout to new branch"
     EXIT_CODE = 64