[PATCH v2 0/1] Advertise multiple supported proto versions

[steadmon@google.com]

From: Josh Steadmon <steadmon@google.com>

This is an alternate approach to the previous series. We add a registry
of supported wire protocol versions that individual commands can use to
declare supported versions before contacting a server. The client will
then advertise all supported versions, while the server will choose the
first recognized version from the advertised list.

Compared to the previous series, this approach is more convenient for
protocol_v2, which is intended to work on a single server endpoint.
However, it has the drawback that every command that acts as a client
must register its supported versions; it is not always obvious which (if
any) network operations a given command will perform.

Thank you to Stefan for his review of the previous series and for
helping me think through the requirements for this new approach.

Josh Steadmon (1):
  protocol: advertise multiple supported versions

 builtin/archive.c      |   3 ++
 builtin/clone.c        |   4 ++
 builtin/fetch-pack.c   |   4 ++
 builtin/fetch.c        |   5 ++
 builtin/ls-remote.c    |   5 ++
 builtin/pull.c         |   5 ++
 builtin/push.c         |   4 ++
 builtin/send-pack.c    |   3 ++
 connect.c              |  47 ++++++++---------
 protocol.c             | 115 ++++++++++++++++++++++++++++++++++++++---
 protocol.h             |  17 ++++++
 remote-curl.c          |  28 ++++++----
 t/t5570-git-daemon.sh  |   2 +-
 t/t5700-protocol-v1.sh |   8 +--
 t/t5702-protocol-v2.sh |  16 +++---
 transport-helper.c     |   6 +++
 16 files changed, 217 insertions(+), 55 deletions(-)

-- 
2.19.0.605.g01d371f741-goog