git_command: refactor User-Agent settings

Convert the RepoUserAgent function into a UserAgent class.  This
makes it cleaner to hold internal state, and will make it easier
to add a separate git User-Agent, although we don't do it here.

We make the RepoSourceVersion independent of GitCommand so that
it can be called by the class (later).

Bug: https://crbug.com/gerrit/11144
Change-Id: Iab4e1f974b8733a36b243b2d03f5085a96effa19
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/239232
Reviewed-by: David Pursehouse <dpursehouse@collab.net>
Tested-by: Mike Frysinger <vapier@google.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/main.py b/main.py
index 0b19aeb5..515cdf47 100755
--- a/main.py
+++ b/main.py
@@ -46,7 +46,7 @@ except ImportError:
 from color import SetDefaultColoring
 import event_log
 from repo_trace import SetTrace
-from git_command import git, GitCommand, RepoUserAgent
+from git_command import git, GitCommand, user_agent
 from git_config import init_ssh, close_ssh
 from command import InteractiveCommand
 from command import MirrorSafeCommand
@@ -297,11 +297,11 @@ def _PruneOptions(argv, opt):
 
 class _UserAgentHandler(urllib.request.BaseHandler):
   def http_request(self, req):
-    req.add_header('User-Agent', RepoUserAgent())
+    req.add_header('User-Agent', user_agent.repo)
     return req
 
   def https_request(self, req):
-    req.add_header('User-Agent', RepoUserAgent())
+    req.add_header('User-Agent', user_agent.repo)
     return req
 
 def _AddPasswordFromUserInput(handler, msg, req):