"git -c grep.patternType=extended log --basic-regexp" misbehaved
because the internal API to access the grep machinery was not
designed well.

* jc/grep-commandline-vs-configuration:
  grep: further simplify setting the pattern type

There is an optimization used in "git diff $treeA $treeB" to borrow
an already checked-out copy in the working tree when it is known to
be the same as the blob being compared, expecting that open/mmap of
such a file is faster than reading it from the object store, which
involves inflating and applying delta.  This however kicked in even
when the checked-out copy needs to go through the convert-to-git
conversion (including the clean filter), which defeats the whole
point of the optimization.  The optimization has been disabled when
the conversion is necessary.

* jk/diff-do-not-reuse-wtf-needs-cleaning:
  diff: do not reuse worktree files that need "clean" conversion

The build procedure for "git persistent-https" helper (in contrib/)
has been updated so that it can be built with more recent versions
of Go.

* pm/build-persistent-https-with-recent-go:
  contrib/persistent-https: use Git version for build label
  contrib/persistent-https: update ldflags syntax for Go 1.7+

"git merge" in Git v2.9 was taught to forbid merging an unrelated
lines of history by default, but that is exactly the kind of thing
the "--rejoin" mode of "git subtree" (in contrib/) wants to do.
"git subtree" has been taught to use the "--allow-unrelated-histories"
option to override the default.

* da/subtree-2.9-regression:
  subtree: fix "git subtree split --rejoin"
  t7900-subtree.sh: fix quoting and broken && chains

"git commit --help" said "--no-verify" is only about skipping the
pre-commit hook, and failed to say that it also skipped the
commit-msg hook.

* os/no-verify-skips-commit-msg-too:
  commit: describe that --no-verify skips the commit-msg hook in the help text

The use of strbuf in "git rm" to build filename to remove was a bit
suboptimal, which has been fixed.

* rs/rm-strbuf-optim:
  rm: reuse strbuf for all remove_dir_recursively() calls

Users of the parse_options_concat() API function need to allocate
extra slots in advance and fill them with OPT_END() when they want
to decide the set of supported options dynamically, which makes the
code error-prone and hard to read.  This has been corrected by tweaking
the API to allocate and return a new copy of "struct option" array.

* jk/parse-options-concat:
  parse_options: allocate a new array when concatenating

Allow http daemon tests in Travis CI tests.

* ls/travis-enable-httpd-tests:
  travis-ci: enable web server tests t55xx on Linux

Existing autoconf generated test for the need to link with pthread
library did not check all the functions from pthread libraries;
recent FreeBSD has some functions in libc but not others, and we
mistakenly thought linking with libc is enough when it is not.

* ew/autoconf-pthread:
  configure.ac: stronger test for pthread linkage

The .c/.h sources are marked as such in our .gitattributes file so
that "git diff -W" and friends would work better.

* rs/help-c-source-with-gitattributes:
  .gitattributes: set file type for C files

"git status" learned to suggest "merge --abort" during a conflicted
merge, just like it already suggests "rebase --abort" during a
conflicted rebase.

* mm/status-suggest-merge-abort:
  status: suggest 'git merge --abort' when appropriate

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

A doc update.

* sb/pack-protocol-doc-nak:
  Documentation: pack-protocol correct NAK response

Code cleanup.

* rs/submodule-config-code-cleanup:
  submodule-config: fix test binary crashing when no arguments given
  submodule-config: combine early return code into one goto
  submodule-config: passing name reference for .gitmodule blobs
  submodule-config: use explicit empty string instead of strbuf in config_from()

A comment update for a topic that was merged to Git v2.8.

* sb/submodule-deinit-all:
  submodule deinit: remove outdated comment

Code simplification.

* rs/worktree-use-strbuf-absolute-path:
  worktree: use strbuf_add_absolute_path() directly

Belated doc update for a feature added in v1.8.5.

* jc/doc-diff-filter-exclude:
  diff: document diff-filter exclusion

Build clean-up.

* nd/test-helpers:
  t/test-lib.sh: fix running tests with --valgrind
  Makefile: use VCSSVN_LIB to refer to svn library
  Makefile: drop extra dependencies for test helpers

Code cleanup.

* rs/use-strbuf-addbuf:
  strbuf: avoid calling strbuf_grow() twice in strbuf_addbuf()
  use strbuf_addbuf() for appending a strbuf to another

Code simplification.

* lf/recv-sideband-cleanup:
  sideband.c: small optimization of strbuf usage
  sideband.c: refactor recv_sideband()

Grammofix.

* ah/unpack-trees-advice-messages:
  unpack-trees: fix English grammar in do-this-before-that messages

A small internal API cleanup.

* lf/sideband-returns-void:
  upload-pack.c: make send_client_data() return void
  sideband.c: make send_sideband() return void

Code clean-up.

* jk/send-pack-stdio:
  write_or_die: remove the unused write_or_whine() function
  send-pack: use buffered I/O to talk to pack-objects

Code clean-up.

* pb/commit-editmsg-path:
  builtin/commit.c: memoize git-path for COMMIT_EDITMSG

Recent FreeBSD stopped making perl available at /usr/bin/perl;
switch the default the built-in path to /usr/local/bin/perl on not
too ancient FreeBSD releases.

* ew/find-perl-on-freebsd-in-local:
  config.mak.uname: correct perl path on FreeBSD

Recent update to "git daemon" tries to enable the socket-level
KEEPALIVE, but when it is spawned via inetd, the standard input
file descriptor may not necessarily be connected to a socket.
Suppress an ENOTSOCK error from setsockopt().

* ew/daemon-socket-keepalive:
  Windows: add missing definition of ENOTSOCK
  daemon: ignore ENOTSOCK from setsockopt

"git pack-objects" and "git index-pack" mostly operate with off_t
when talking about the offset of objects in a packfile, but there
were a handful of places that used "unsigned long" to hold that
value, leading to an unintended truncation.

* nd/pack-ofs-4gb-limit:
  fsck: use streaming interface for large blobs in pack
  pack-objects: do not truncate result in-pack object size on 32-bit systems
  index-pack: correct "offset" type in unpack_entry_data()
  index-pack: report correct bad object offsets even if they are large
  index-pack: correct "len" type in unpack_data()
  sha1_file.c: use type off_t* for object_info->disk_sizep
  pack-objects: pass length to check_pack_crc() without truncation

"git notes merge" had a code to see if a path exists (and fails if
it does) and then open the path for writing (when it doesn't).
Replace it with open with O_EXCL.

* rs/notes-merge-no-toctou:
  notes-merge: use O_EXCL to avoid overwriting existing files

An age old bug that caused "git diff --ignore-space-at-eol"
misbehave has been fixed.

* js/ignore-space-at-eol:
  diff: fix a double off-by-one with --ignore-space-at-eol
  diff: demonstrate a bug with --patience and --ignore-space-at-eol

"git fetch http://user:pass@host/repo..." scrubbed the userinfo
part, but "git push" didn't.

* jk/push-scrub-url:
  t5541: fix url scrubbing test when GPG is not set
  push: anonymize URL in status output

"git add -N dir/file && git write-tree" produced an incorrect tree
when there are other paths in the same directory that sorts after
"file".

* nd/cache-tree-ita:
  cache-tree: do not generate empty trees as a result of all i-t-a subentries
  cache-tree.c: fix i-t-a entry skipping directory updates sometimes
  test-lib.sh: introduce and use $EMPTY_BLOB
  test-lib.sh: introduce and use $EMPTY_TREE

"git blame file" allowed the lineage of lines in the uncommitted,
unadded contents of "file" to be inspected, but it refused when
"file" did not appear in the current commit.  When "file" was
created by renaming an existing file (but the change has not been
committed), this restriction was unnecessarily tight.

* mh/blame-worktree:
  t/t8003-blame-corner-cases.sh: Use here documents
  blame: allow to blame paths freshly added to the index

Since arg[0] will be NULL without any argument here and starts_with()
does not like NULL-pointers.
Signed-off-by: NHeiko Voigt <hvoigt@hvoigt.net>
Reviewed-by: NStefan Beller <sbeller@google.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

So we have simpler return handling code and all the cleanup code in
almost one place.
Signed-off-by: NHeiko Voigt <hvoigt@hvoigt.net>
Reviewed-by: NStefan Beller <sbeller@google.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Commit 959b5455 (submodule: implement a config API for lookup of
.gitmodules values, 2015-08-18) implemented the initial version of the
submodule config cache. During development of that initial version we
extracted the function gitmodule_sha1_from_commit(). During that process
we missed that the strbuf rev was still used in config_from() and now is
left empty. Lets fix this by also returning this string.

This means that now when reading .gitmodules from revisions, the error
messages also contain a reference to the blob they are from.
Signed-off-by: NHeiko Voigt <hvoigt@hvoigt.net>
Reviewed-by: NStefan Beller <sbeller@google.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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

A test that unconditionally used "mktemp" learned that the command
is not necessarily available everywhere.

* ak/lazy-prereq-mktemp:
  t7610: test for mktemp before test execution

"git grep -i" has been taught to fold case in non-ascii locales
correctly.

* nd/icase:
  grep.c: reuse "icase" variable
  diffcore-pickaxe: support case insensitive match on non-ascii
  diffcore-pickaxe: Add regcomp_or_die()
  grep/pcre: support utf-8
  gettext: add is_utf8_locale()
  grep/pcre: prepare locale-dependent tables for icase matching
  grep: rewrite an if/else condition to avoid duplicate expression
  grep/icase: avoid kwsset when -F is specified
  grep/icase: avoid kwsset on literal non-ascii strings
  test-regex: expose full regcomp() to the command line
  test-regex: isolate the bug test code
  grep: break down an "if" stmt in preparation for next changes

Fix recently introduced codepaths that are involved in parallel
submodule operations, which gave up on reading too early, and
could have wasted CPU while attempting to write under a corner
case condition.

* sb/submodule-parallel-fetch:
  hoist out handle_nonblock function for xread and xwrite
  xwrite: poll on non-blocking FDs
  xread: retry after poll on EAGAIN/EWOULDBLOCK

"git blame -M" missed a single line that was moved within the file.

* dk/blame-move-no-reason-for-1-line-context:
  blame: require 0 context lines while finding moved lines with -M