wt-status.*: better advices for git status added

This patch provides new informative help messages in the display of
'git status' (at the top) during conflicts, rebase, am, bisect or
cherry-pick process.

The new messages are not shown when using options such as -s or
--porcelain. The messages about the current situation of the user are
always displayed but the advices on what the user needs to do in order
to resume a rebase/bisect/am/commit after resolving conflicts can be
hidden by setting advice.statushints to 'false' in the config file.

Thus, information about the updated advice.statushints key are added
in Documentation/config.txt.

Also, the test t7060-wt-status.sh is now working with the new help
messages. Tests about suggestions of "git rm" are also added.

Signed-off-by: Lucien Kong <Lucien.Kong@ensimag.imag.fr>
Signed-off-by: Valentin Duperray <Valentin.Duperray@ensimag.imag.fr>
Signed-off-by: Franck Jonas <Franck.Jonas@ensimag.imag.fr>
Signed-off-by: Thomas Nguy <Thomas.Nguy@ensimag.imag.fr>
Signed-off-by: Huynh Khoi Nguyen Nguyen <Huynh-Khoi-Nguyen.Nguyen@ensimag.imag.fr>
Signed-off-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
t7512-status-help.sh: better advices for git status

The following tests include several cases in which the user needs to
run 'git status' to know his current situation, whether there're
conflicts or he's in rebase/bisect/am/cherry-pick progress.

One of the test is about the set of the advice.statushints config key
to 'false' in .git/config.

Signed-off-by: Lucien Kong <Lucien.Kong@ensimag.imag.fr>
Signed-off-by: Valentin Duperray <Valentin.Duperray@ensimag.imag.fr>
Signed-off-by: Franck Jonas <Franck.Jonas@ensimag.imag.fr>
Signed-off-by: Thomas Nguy <Thomas.Nguy@ensimag.imag.fr>
Signed-off-by: Huynh Khoi Nguyen Nguyen <Huynh-Khoi-Nguyen.Nguyen@ensimag.imag.fr>
Signed-off-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
status: don't suggest "git rm" or "git add" if not appropriate

The display of the advice '(use git add/rm [...])' (when there are
unmerged files) after running 'git status' is now depending of the
mark, whether it's 'both deleted', 'deleted by us/them' or others. For
instance, when there is just one file that's marked as 'both deleted',
'git status' shows '(use git rm [...])' and if there are two files,
one as 'both deleted' and the other as 'added by them', the advice is
'(use git add/rm [...])'.

The previous tests in t7512-status-help.sh are updated.

Test about the case of only 'both deleted' is added in
t7060-wtstatus.sh

Signed-off-by: Lucien Kong <Lucien.Kong@ensimag.imag.fr>
Signed-off-by: Valentin Duperray <Valentin.Duperray@ensimag.imag.fr>
Signed-off-by: Franck Jonas <Franck.Jonas@ensimag.imag.fr>
Signed-off-by: Thomas Nguy <Thomas.Nguy@ensimag.imag.fr>
Signed-off-by: Huynh Khoi Nguyen Nguyen <Huynh-Khoi-Nguyen.Nguyen@ensimag.imag.fr>
Signed-off-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
status: better advices when splitting a commit (during rebase -i)

Add new informative help messages at the output of 'git status' when
the user is splitting a commit. The code figures this state by
comparing the contents of the following files in the .git/ directory:

 - HEAD
 - ORIG_HEAD
 - rebase-merge/amend
 - rebase-merge/orig-head

Signed-off-by: Lucien Kong <Lucien.Kong@ensimag.imag.fr>
Signed-off-by: Valentin Duperray <Valentin.Duperray@ensimag.imag.fr>
Signed-off-by: Franck Jonas <Franck.Jonas@ensimag.imag.fr>
Signed-off-by: Thomas Nguy <Thomas.Nguy@ensimag.imag.fr>
Signed-off-by: Huynh Khoi Nguyen Nguyen <Huynh-Khoi-Nguyen.Nguyen@ensimag.imag.fr>
Signed-off-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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

By Jon Seymour
* js/submodule-relative:
  submodule: fix handling of superproject origin URLs like foo, ./foo and ./foo/bar
  submodule: fix sync handling of some relative superproject origin URLs
  submodule: document failure to handle relative superproject origin URLs
  submodule: additional regression tests for relative 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-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 'db/vcs-svn' into pu

I do not know the doneness of this series that came out of the
blue.  Are people involved in vcs-svn happy with this series?

By David Barr
* db/vcs-svn:
  vcs-svn: drop no-op reset methods
  vcs-svn: fix signedness warnings
  vcs-svn: prefer strstr over memmem
  vcs-svn: prefer constcmp to prefixcmp
  vcs-svn: simplify cleanup in apply_one_window()
  vcs-svn: fix clang-analyzer error
Merge branch 'jk/no-more-pre-exec-callback' into pu

On hold for 6 months until ancient "less" goes extinct.

By Jeff King
* jk/no-more-pre-exec-callback:
  pager: drop "wait for output to run less" hack
Merge branch 'lk/more-helpful-status-hints' into pu

By Lucien Kong
* lk/more-helpful-status-hints:
  status: better advices when splitting a commit (during rebase -i)
  status: don't suggest "git rm" or "git add" if not appropriate
  t7512-status-help.sh: better advices for git status
  wt-status.*: better advices for git status added