ls-files -i: pay attention to exclusion of leading paths

"git ls-files --exclude=t/ -i" does not show paths in directory t/
that have been added to the index, but it should.

The excluded() API was designed for callers who walk the tree from
the top, checking each level of the directory hierarchy as it
descends if it is excluded, and not even bothering to recurse into
an excluded directory.  This would allow us optimize for a common
case by not having to check if the exclude pattern "foo/" matches
when looking at "foo/bar", because the caller should have noticed
that "foo" is excluded and did not even bother to read "foo/bar"
out of opendir()/readdir() to call it.

The code for "ls-files -i" however walks the index linearly, feeding
paths without checking if the leading directory is already excluded.

Introduce a helper function path_excluded() to let this caller
properly call excluded() check for higher hierarchies as necessary.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
ls-files -i: micro-optimize path_excluded()

As we know a caller that does not recurse is calling us in the index
order, we can remember the last directory we found to be excluded
and see if the path we are looking at is still inside it, in which
case we can just answer that it is excluded.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
request-pull: really favor a matching tag

After tagging the tip of "dev" branch with a "for-linus" tag and
pushing both out, running

	$ git request-pull $url $last_release dev

would produce an output asking the 'dev' branch of $url to be
pulled, because that is what the user asked the message to say.

We already detect this situation locally and include the contents of
the tag in the output; if the $url has that tag, favor that tag
(i.e. "for-linus") in the generated message over the branch name the
user gave us (i.e. "dev") from the command line, to make the output
look more consistent.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'cr/persistent-https' into jch

A remote helper that acts as a proxy that caches ssl session for the
https:// transport is added to the contrib/ area.

By Colby Ranger
* cr/persistent-https:
  Add persistent-https to contrib
Merge branch 'nl/http-proxy-more' into pu

I queued only the later two patches from this series, even though they do
not make much sense without the first one that seems to need a bit more
work, so that we won't forget.

By Jeff King (1) and Nelson Benitez Leon (1)
* nl/http-proxy-more:
  http: rename HTTP_REAUTH to HTTP_AUTH_RETRY
  http: Avoid limit of retrying request only twice
Merge branch 'mm/push-default-switch-warning' into pu

Will squash the two, but this has to wait for a few release cycles.

By Junio C Hamano (1) and Matthieu Moy (1)
* mm/push-default-switch-warning:
  t5541: warning message is given even with --quiet
  push: start warning upcoming default change for push.default
Merge branch 'jc/split-blob' into pu

Not ready.

I finished the streaming checkout codepath, but as explained in
127b177 (bulk-checkin: support chunked-object encoding, 2011-11-30),
these are still early steps of a long and painful journey. At least
pack-objects and fsck need to learn the new encoding for the series
to be usable locally, and then index-pack/unpack-objects needs to
learn it to be used remotely.

Given that I heard a lot of noise that people want large files, and
that I was asked by somebody at GitTogether'11 privately for an
advice on how to pay developers (not me) to help adding necessary
support, I am somewhat dissapointed that the original patch series
that was sent almost two months ago still remains here without much
comments and updates from the developer community. I even made the
interface to the logic that decides where to split chunks easily
replaceable, and I deliberately made the logic in the original patch
extremely stupid to entice others, especially the "bup" fanboys, to
come up with a better logic, thinking that giving people an easy
target to shoot for, they may be encouraged to help out. The plan is
not working :-(.

* jc/split-blob:
  chunked-object: streaming checkout
  chunked-object: fallback checkout codepaths
  bulk-checkin: support chunked-object encoding
  bulk-checkin: allow the same data to be multiply hashed
  new representation types in the packstream
  packfile: use varint functions

Conflicts:
	builtin/pack-objects.c
	streaming.c
	t/t1050-large.sh
Merge branch 'jc/run-hook-env-1' into pu

Not urgent.

Updates run_hook() API to be much less specific to "commit".  It would
only be useful if people start doing more interesting things with hooks.

* jc/run-hook-env-1:
  run_hook(): enhance the interface to pass arbitrary environment
Merge branch 'jc/maint-push-refs-all' into pu

Allows pushing and fetching refs/stash.
Not ready.
There still seem to be other bugs hiding (e.g. try pushing twice).

* jc/maint-push-refs-all:
  get_fetch_map(): tighten checks on dest refs
  fetch/push: allow refs/*:refs/*
Merge branch 'jc/apply-3way' into pu

"git apply" learns to wiggle the base version and perform three-way merge
when a patch does not exactly apply to the version you have.

It turns out that it is somewhat unpleasant to handle add/add conflicts in
this code, but it seems necessary if we want to use "apply -3" to replace
the use of "apply --build-fake-ancestor" followed by the slow "merge" in
"am -3".

* jc/apply-3way:
  WIP: the message is bogus in apply:::check_patch()
  apply: refactor "previous patch" logic
  apply: a bit more comments on PATH_TO_BE_DELETED
  apply: document --3way option
  apply: allow rerere() upon --3way results
  apply: register conflicted stages to the index
  apply: plug the three-way merge logic in
  apply: fall back on three-way merge
  apply: accept -3/--3way command line option
  apply: split load_preimage() helper function out
  apply: refactor read_file_or_gitlink()
  apply: clear_image() clears things a bit more

Conflicts:
	builtin/apply.c
Merge branch 'fc/git-prompt-script' into pu

The last remaining sticking point is what to do with the duplicated shell
function.

By Felipe Contreras (2) and SZEDER Gábor (2)
* fc/git-prompt-script:
  completion: split __git_ps1 into a separate script
  completion: remove executable mode
  tests: add tests for the bash prompt functions in the completion script
  tests: move code to run tests under bash into a helper library
Merge branch 'js/submodule-relative' into pu

Reroll went to v7 but hasn't settled yet.

By Jon Seymour (2) and Ramsay Jones (1)
* js/submodule-relative:
  t7403-*.sh: Avoid use of the nonportable '==' operator
  submodule: fix handling of relative superproject origin URLs
  submodule: document handling of relative superproject origin URLs
Merge branch 'nd/stream-index-pack' into pu

Use streaming API to read from the object store to avoid having to hold
a large blob object in-core while running index-pack.

By Nguyễn Thái Ngọc Duy
* nd/stream-index-pack:
  index-pack: use streaming interface for collision test on large blobs
  index-pack: factor out unpack core from get_data_from_pack
  index-pack: use streaming interface on large blobs (most of the time)
  index-pack: hash non-delta objects while reading from stream
Merge branch 'sg/bash-prompt' into pu

This is only the "correction" bits taken from the beginning of a larger
series that is to be rerolled.  The first two are tangled with Felipe's
topic so a reroll, if comes, should build on top of them.

By SZEDER Gábor
* sg/bash-prompt:
  completion: respect $GIT_DIR
  completion: use __gitdir() in _git_log()
Merge branch 'jk/no-more-asciidoc7' into pu

By Jeff King
* jk/no-more-asciidoc7:
  docs: drop antique comment from Makefile
  docs: drop asciidoc7compatible flag
Merge branch 'jk/clone-local' into pu

"git clone --local $path" started its life as an experiment to
optionally use link/copy when cloning a repository on the disk, but
we didn't deprecate it after we made the option a no-op to always
use the optimization.

By Jeff King
* jk/clone-local:
  clone: allow --no-local to turn off local optimizations
  docs/clone: mention that --local may be ignored
Merge branch 'jk/no-op-push-message' into pu

Rewords the status message of "git push" that pushed only one ref
differently from "Everything up-to-date", to give a bit more help to
people who get the message when their current branch is not pushed.

It probably is a better idea to add a message that says that the
current was not pushed to address the problem in a more direct way.

By Jeff King
* jk/no-op-push-message:
  improve no-op push output
Merge branch 'nd/exclude-workaround-top-heavy' into pu

Attempts to optimize matching with an exclude pattern with a deep
directory hierarchy by taking the part that specifies leading path
without wildcard literally.

The code to check for wildcard needs to be redone.

By Nguyễn Thái Ngọc Duy
* nd/exclude-workaround-top-heavy:
  exclude: do strcmp as much as possible before fnmatch
  Unindent excluded_from_list()
Merge branch 'nd/stream-pack-objects' into pu

By Nguyễn Thái Ngọc Duy
* nd/stream-pack-objects:
  pack-objects: use streaming interface for reading large loose blobs

Conflicts:
	builtin/pack-objects.c
Merge branch 'jc/ls-files-i-dir' into pu

"git ls-files --exclude=t -i" did not consider anything under t/
as excluded, as it did not pay attention to exclusion of leading
paths while walking the index.

* jc/ls-files-i-dir:
  ls-files -i: micro-optimize path_excluded()
  ls-files -i: pay attention to exclusion of leading paths