[PATCH v3 0/3] add push --current and remote.*.pushHeadOnly

[Paolo Bonzini <bonzini@gnu.org>]

This second series is gets rid of the most annoying part (IMHO) of
push.default = tracking, i.e. the fact that its behavior cannot be
achieved using git's ordinary tools.  While autosetuppush is enough to
set the refspecs correctly, push.tracking does not push _all_ tracked
branches, but only the current one (because it implicitly adds only one
refspec, while autosetuppush places them all in the configuration).

What I introduce here is "git push --current" and a companion
remote.*.pushHeadOnly option to make it the default.  The difference
between "git push HEAD" and "git push --current" is that the latter
will still walk the remote.*.push refspecs, but honor only the one
matching HEAD.  This means that this option, unlike the "HEAD" refspec,
supports a destination name that differs from the source name.

Together with autosetuppush, this more or less achieves the same result
as push.tracking, at least for newly created remotes.  Two (three?)
subsequent series will handle the transition.

Patch 1 partially reverts bba0fd2 (push: do not give big warning when
no preference is configured, 2009-07-18).  Patch 2 is the meat of the
implementation.  Most of it actually touches the transport mechanism,
not builtin-push.c (which covers only one detail about how to handle
"git push --current" when the remote does not have a corresponding
push refspec).  Patch 3 adds remote.*.pushHeadOnly.

v3:
	documentation changes from Bjoern Steinbrink
	includes tests for http-push.c changes

v2:
	update to recent master
	changes from Nanako's review

Paolo Bonzini (3):
      reintroduce PUSH_DEFAULT_UNSPECIFIED
      push: add --current
      push: add remote.*.pushHeadOnly configuration

 Documentation/config.txt   |    6 ++++
 Documentation/git-push.txt |   17 ++++++++++-
 builtin-push.c             |   17 +++++++++--
 cache.h                    |    1 +
 environment.c              |    2 +-
 http-push.c                |   27 ++++++++++++++----
 remote.c                   |   42 ++++++++++++++++++++++++-----
 remote.h                   |    3 ++
 t/t5516-fetch-push.sh      |   64 ++++++++++++++++++++++++++++++++++++++++++++
 t/t5540-http-push.sh       |   32 ++++++++++++++++++++++
 transport.c                |   22 ++++++++++++++-
 transport.h                |    1 +
 12 files changed, 214 insertions(+), 20 deletions(-)