Clean up refs API and make "git clone" less intimate with the
implementation detail.

* mh/init-delete-refs-api:
  delete_ref(): use the usual convention for old_sha1
  cmd_update_ref(): make logic more straightforward
  update_ref(): don't read old reference value before delete
  check_branch_commit(): make first parameter const
  refs.h: add some parameter names to function declarations
  refs: move the remaining ref module declarations to refs.h
  initial_ref_transaction_commit(): check for ref D/F conflicts
  initial_ref_transaction_commit(): check for duplicate refs
  refs: remove some functions from the module's public interface
  initial_ref_transaction_commit(): function for initial ref creation
  repack_without_refs(): make function private
  prune_refs(): use delete_refs()
  prune_remote(): use delete_refs()
  delete_refs(): bail early if the packed-refs file cannot be rewritten
  delete_refs(): make error message more generic
  delete_refs(): new function for the refs API
  delete_ref(): handle special case more explicitly
  remove_branches(): remove temporary
  delete_ref(): move declaration to refs.h

Reimplement 'git pull' in C.

* pt/pull-builtin:
  pull: remove redirection to git-pull.sh
  pull --rebase: error on no merge candidate cases
  pull --rebase: exit early when the working directory is dirty
  pull: configure --rebase via branch.<name>.rebase or pull.rebase
  pull: teach git pull about --rebase
  pull: set reflog message
  pull: implement pulling into an unborn branch
  pull: fast-forward working tree if head is updated
  pull: check if in unresolved merge state
  pull: support pull.ff config
  pull: error on no merge candidates
  pull: pass git-fetch's options to git-fetch
  pull: pass git-merge's options to git-merge
  pull: pass verbosity, --progress flags to fetch and merge
  pull: implement fetch + merge
  pull: implement skeletal builtin pull
  argv-array: implement argv_array_pushv()
  parse-options-cb: implement parse_opt_passthru_argv()
  parse-options-cb: implement parse_opt_passthru()

Enhance packet tracing machinery to allow capturing an incoming
pack data to a file for debugging.

* jk/pkt-log-pack:
  pkt-line: support tracing verbatim pack contents
  pkt-line: tighten sideband PACK check when tracing
  pkt-line: simplify starts_with checks in packet tracing

"git rebase -i"'s list of todo is made configurable.

* mr/rebase-i-customize-insn-sheet:
  git-rebase--interactive.sh: add config option for custom instruction format

"git send-email" now performs alias-expansion on names that are
given via --cccmd, etc.

This round comes with a lot more enhanced e-mail address parser,
which makes it a bit scary, but as long as it works as designed, it
makes it wonderful ;-).

* rl/send-email-aliases:
  send-email: suppress meaningless whitespaces in from field
  send-email: allow multiple emails using --cc, --to and --bcc
  send-email: consider quote as delimiter instead of character
  send-email: reduce dependencies impact on parse_address_line
  send-email: minor code refactoring
  send-email: allow use of aliases in the From field of --compose mode
  send-email: refactor address list process
  t9001-send-email: refactor header variable fields replacement
  send-email: allow aliases in patch header and command script outputs
  t9001-send-email: move script creation in a setup test

* kb/i18n-doc:
  Documentation/i18n.txt: clarify character encoding support

Running an aliased command from a subdirectory when the .git thing
in the working tree is a gitfile pointing elsewhere did not work.

* nd/export-worktree:
  setup: set env $GIT_WORK_TREE when work tree is set, like $GIT_DIR

Replace "is this subdirectory a separate repository that should not
be touched?" check "git clean" does by checking if it has .git/HEAD
using the submodule-related code with a more optimized check.

* ee/clean-remove-dirs:
  read_gitfile_gently: fix use-after-free
  clean: improve performance when removing lots of directories
  p7300: add performance tests for clean
  t7300: add tests to document behavior of clean and nested git
  setup: sanity check file size in read_gitfile_gently
  setup: add gentle version of read_gitfile

Move machinery to parse human-readable scaled numbers like 1k, 4M,
and 2G as an option parameter's value from pack-objects to
parse-options API, to make it available to other codepaths.

* cb/parse-magnitude:
  parse-options: move unsigned long option parsing out of pack-objects.c
  test-parse-options: update to handle negative ints

"git verify-tag" and "git verify-commit" have been taught to share
more code, and then learned to optionally show the verification
message from the underlying GPG implementation.

* bc/gpg-verify-raw:
  verify-tag: add option to print raw gpg status information
  verify-commit: add option to print raw gpg status information
  gpg: centralize printing signature buffers
  gpg: centralize signature check
  verify-commit: add test for exit status on untrusted signature
  verify-tag: share code with verify-commit
  verify-tag: add tests

Various enhancements around "git am" reading patches generated by
foreign SCM.

* pt/am-foreign:
  am: teach mercurial patch parser how to read from stdin
  am: use gmtime() to parse mercurial patch date
  t4150: test applying StGit series
  am: teach StGit patch parser how to read from stdin
  t4150: test applying StGit patch

GSoC project to rebuild ref listing by branch and tag based on the
for-each-ref machinery.  This is its first part.

* kn/for-each-ref:
  ref-filter: make 'ref_array_item' use a FLEX_ARRAY for refname
  for-each-ref: introduce filter_refs()
  ref-filter: move code from 'for-each-ref'
  ref-filter: add 'ref-filter.h'
  for-each-ref: rename variables called sort to sorting
  for-each-ref: rename some functions and make them public
  for-each-ref: introduce 'ref_array_clear()'
  for-each-ref: introduce new structures for better organisation
  for-each-ref: rename 'refinfo' to 'ref_array_item'
  for-each-ref: clean up code
  for-each-ref: extract helper functions out of grab_single_ref()

Add an environment variable to tell Git to look into refs hierarchy
other than refs/replace/ for the object replacement data.

* mh/replace-refs:
  Allow to control where the replace refs are looked for

This would remove the need of using a pointer to store refname.
Mentored-by: NChristian Couder <christian.couder@gmail.com>
Mentored-by: NMatthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: NKarthik Nayak <karthik.188@gmail.com>
Reviewed-by: NMatthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Introduce filter_refs() which will act as an API for filtering
a set of refs. Based on the type of refs the user has requested,
we iterate through those refs and apply filters as per the
given ref_filter structure and finally store the filtered refs
in the ref_array structure.

Currently this will wrap around ref_filter_handler(). Hence,
ref_filter_handler is made file scope static.

As users of this API will no longer send a ref_filter_cbdata
structure directly, we make the elements of ref_filter_cbdata
pointers. We can now use the information given by the users
to obtain our own ref_filter_cbdata structure. Changes are made to
support the change in ref_filter_cbdata structure.

Make 'for-each-ref' use this API.
Helped-by: NJunio C Hamano <gitster@pobox.com>
Mentored-by: NChristian Couder <christian.couder@gmail.com>
Mentored-by: NMatthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: NKarthik Nayak <karthik.188@gmail.com>
Reviewed-by: NMatthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Move most of the code from 'for-each-ref' to 'ref-filter' to make
it publicly available to other commands, this is to unify the code
of 'tag -l', 'branch -l' and 'for-each-ref' so that they can share
their implementations with each other.

Add 'ref-filter' to the Makefile, this completes the movement of code
from 'for-each-ref' to 'ref-filter'.
Mentored-by: NChristian Couder <christian.couder@gmail.com>
Mentored-by: NMatthieu Moy <matthieu.moy@grenoble-inp.fr>
Signed-off-by: NKarthik Nayak <karthik.188@gmail.com>
Reviewed-by: NMatthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Doc update.

* jk/pretty-encoding-doc:
  docs: clarify that --encoding can produce invalid sequences

Doc update.

* tb/checkout-doc:
  git-checkout.txt: document "git checkout <pathspec>" better

* ls/hint-rev-list-count:
  rev-list: add --count to usage guide

* mm/branch-doc-updates:
  Documentation/branch: document -M and -D in terms of --force
  Documentation/branch: document -d --force and -m --force

A fix to a minor regression to "git fsck" in v2.2 era that started
complaining about a body-less tag object when it lacks a separator
empty line after its header to separate it with a non-existent body.

* jc/fsck-retire-require-eoh:
  fsck: it is OK for a tag and a commit to lack the body

We used to ask libCURL to use the most secure authentication method
available when talking to an HTTP proxy only when we were told to
talk to one via configuration variables.  We now ask libCURL to
always use the most secure authentication method, because the user
can tell libCURL to use an HTTP proxy via an environment variable
without using configuration variables.

* et/http-proxyauth:
  http: always use any proxy auth method available

When you say "!<ENTER>" while running say "git log", you'd confuse
yourself in the resulting shell, that may look as if you took
control back to the original shell you spawned "git log" from but
that isn't what is happening.  To that new shell, we leaked
GIT_PAGER_IN_USE environment variable that was meant as a local
communication between the original "Git" and subprocesses that was
spawned by it after we launched the pager, which caused many
"interesting" things to happen, e.g. "git diff | cat" still paints
its output in color by default.

Stop leaking that environment variable to the pager's half of the
fork; we only need it on "Git" side when we spawn the pager.

* jc/unexport-git-pager-in-use-in-pager:
  pager: do not leak "GIT_PAGER_IN_USE" to the pager

Avoid possible ssize_t to int truncation.

* mh/strbuf-read-file-returns-ssize-t:
  strbuf: strbuf_read_file() should return ssize_t

"git config" failed to update the configuration file when the
underlying filesystem is incapable of renaming a file that is still
open.

* kb/config-unmap-before-renaming:
  config.c: fix writing config files on Windows network shares

A minor bugfix when pack bitmap is used with "rev-list --count".

* jk/rev-list-no-bitmap-while-pruning:
  rev-list: disable --use-bitmap-index when pruning commits

An ancient test framework enhancement to allow color was not
entirely correct; this makes it work even when tput needs to read
from the ~/.terminfo under the user's real HOME directory.

* rh/test-color-avoid-terminfo-in-original-home:
  test-lib.sh: fix color support when tput needs ~/.terminfo
  Revert "test-lib.sh: do tests for color support after changing HOME"

Fix a small bug in our use of umask() return value.

* jk/fix-refresh-utime:
  check_and_freshen_file: fix reversed success-check

"git rebase" did not exit with failure when format-patch it invoked
failed for whatever reason.

* cb/rebase-am-exit-code:
  rebase: return non-zero error code if format-patch fails

Disable "have we lost a race with competing repack?" check while
receiving a huge object transfer that runs index-pack.

* jk/index-pack-reduce-recheck:
  index-pack: avoid excessive re-reading of pack directory

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

This reverts commit d96a275b.

It used to be possible to apply a patch series with "git am mbox"
and then only after seeing a failure, switch to three-way mode via
"git am -3" (no other options or arguments).  The commit being
reverted broke this workflow.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* tf/gitweb-typofix:
  gitweb: fix typo in man page

l10n-2.5.0-rnd2

* tag 'l10n-2.5.0-rnd2' of git://github.com/git-l10n/git-po:
  l10n: ca.po: update translation
  l10n: de.po: translate 9 new messages
  l10n: Updated Bulgarian translation of git (2359t,0f,0u)
  l10n: zh_CN: for git v2.5.0 l10n round 2
  l10n: sv.po: Update Swedish translation (2359t0f0u)
  l10n: fr v2.5.0 round 2 (2359t)
  l10n: ru.po: update Russian translation
  l10n: Updated Vietnamese translation (2359t)
  l10n: git.pot: v2.5.0 round 2 (9 new, 5 removed)

Signed-off-by: NAlex Henrie <alexhenrie24@gmail.com>

Code clean-up.

* jk/still-interesting:
  revision.c: remove unneeded check for NULL