[WIP 00/15] protocol version 2

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A while back I sent out a rough outline for what a protocol version 2 would
look like at
https://public-inbox.org/git/20171020171839.4188-1-bmwill@xxxxxxxxxx/.  After
hacking at both the server and client code I've managed to get some patches for
protocol version 2 which implement listing refs and cloning/fetching working.
I still need to get the push side of things working before this would be viable
to accept and apply but I figured this was in a good enough state to start
getting some early feedback on the concept.  I'm hoping that some comments and
other pairs of eyes can help me identify deficiencies earlier rather than
later.

As a whole, fetch works fairly similar to the way it works in v1 except I
removed the support for shallow clients for the time being in order to make it
easier to implement at first.  I haven't decided if it makes more sense to have
the deepening as a separate server command or to keep it in fetch like it is in
v1, just something to think about.

Any comments or criticism is welcome. Thanks!

Brandon Williams (15):
  pkt-line: introduce packet_read_with_status
  pkt-line: introduce struct packet_reader
  pkt-line: add delim packet support
  upload-pack: convert to a builtin
  upload-pack: factor out processing lines
  transport: use get_refs_via_connect to get refs
  connect: convert get_remote_heads to use struct packet_reader
  connect: discover protocol version outside of get_remote_heads
  transport: store protocol version
  protocol: introduce enum protocol_version value protocol_v2
  serve: introduce git-serve
  ls-refs: introduce ls-refs server command
  connect: request remote refs using v2
  upload_pack: introduce fetch server command
  fetch-pack: perform a fetch using v2

 .gitignore             |   1 +
 Makefile               |   6 +-
 builtin.h              |   2 +
 builtin/fetch-pack.c   |  19 ++-
 builtin/receive-pack.c |   3 +
 builtin/send-pack.c    |  18 ++-
 builtin/serve.c        |  25 ++++
 connect.c              | 210 +++++++++++++++++++++---------
 connect.h              |   3 +
 fetch-pack.c           | 237 +++++++++++++++++++++++++++++++++-
 fetch-pack.h           |   4 +-
 git.c                  |   2 +
 ls-refs.c              |  96 ++++++++++++++
 ls-refs.h              |   9 ++
 pkt-line.c             | 133 +++++++++++++++++--
 pkt-line.h             |  31 +++++
 protocol.c             |   2 +
 protocol.h             |   1 +
 remote-curl.c          |  21 ++-
 remote.h               |   7 +-
 serve.c                | 195 ++++++++++++++++++++++++++++
 serve.h                |   6 +
 t/t5701-protocol-v2.sh |  54 ++++++++
 transport.c            |  84 ++++++++----
 upload-pack.c          | 342 +++++++++++++++++++++++++++++++++++++++++++------
 upload-pack.h          |   9 ++
 26 files changed, 1371 insertions(+), 149 deletions(-)
 create mode 100644 builtin/serve.c
 create mode 100644 ls-refs.c
 create mode 100644 ls-refs.h
 create mode 100644 serve.c
 create mode 100644 serve.h
 create mode 100755 t/t5701-protocol-v2.sh
 create mode 100644 upload-pack.h

-- 
2.15.1.424.g9478a66081-goog




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