Change calls to die(..., strerror(errno)) to use the new die_errno().

In the process, also make slight style adjustments: at least state
_something_ about the function that failed (instead of just printing
the pathname), and put paths in single quotes.
Signed-off-by: NThomas Rast <trast@student.ethz.ch>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

[tr: handle border case where % is placed at end of buffer]
Signed-off-by: NJunio C Hamano <gitster@pobox.com>
Signed-off-by: NThomas Rast <trast@student.ethz.ch>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

There are many calls to die() that do, or should, report
strerror(errno) to indicate how the syscall they guard failed.
Introduce a small helper function for this case.

Note:

- POSIX says vsnprintf can modify errno in some unlikely cases, so we
  have to use errno early.

- We take some care to pass the original format to die_routine(), in
  case someone wants to call die_errno() with custom format
  characters.
Signed-off-by: NThomas Rast <trast@student.ethz.ch>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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

* maint:
  Documentation: refer to gitworkflows(7) from tutorial and git(1)
  daemon: Strictly parse the "extra arg" part of the command

Add references to the gitworkflows(7) manpage added in f948dd89
(Documentation: add manpage about workflows, 2008-10-19) to both
gittutorial(1) and git(1), so that new users might actually discover
and read it.

Noticed by Randal L. Schwartz.
Signed-off-by: NThomas Rast <trast@student.ethz.ch>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Since 1.4.4.5 (49ba83fb "Add virtualization support to git-daemon")
git daemon enters an infinite loop and never terminates if a client
hides any extra arguments in the initial request line which is not
exactly "\0host=blah\0".

Since that change, a client must never insert additional extra
arguments, or attempt to use any argument other than "host=", as
any daemon will get stuck parsing the request line and will never
complete the request.

Since the client can't tell if the daemon is patched or not, it
is not possible to know if additional extra args might actually be
able to be safely requested.

If we ever need to extend the git daemon protocol to support a new
feature, we may have to do something like this to the exchange:

  # If both support git:// v2
  #
  C: 000cgit://v2
  S: 0010ok host user
  C: 0018host git.kernel.org
  C: 0027git-upload-pack /pub/linux-2.6.git
  S: ...git-upload-pack header...

  # If client supports git:// v2, server does not:
  #
  C: 000cgit://v2
  S: <EOF>

  C: 003bgit-upload-pack /pub/linux-2.6.git\0host=git.kernel.org\0
  S: ...git-upload-pack header...

This requires the client to create two TCP connections to talk to
an older git daemon, however all daemons since the introduction of
daemon.c will safely reject the unknown "git://v2" command request,
so the client can quite easily determine the server supports an
older protocol.
Signed-off-by: NShawn O. Pearce <spearce@spearce.org>
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>

Add a '$' in the __git_ps1 output to show stashed changes are present,
when GIT_PS1_SHOWSTASHSTATE is set to a nonempty value.

The code for checking if the stash has entries is taken from
'git-stash.sh'.
Signed-off-by: NDaniel Trstenjak <daniel.trstenjak@online.de>
Acked-by: NShawn O. Pearce <spearce@spearce.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The command "git grep -w ''" dies as soon as it encounters an empty line,
reporting (wrongly) that "regexp returned nonsense".  The first hunk of
this patch relaxes the sanity check that is responsible for that,
allowing matches to start at the end.

The second hunk complements it by making sure that empty matches are
rejected if -w was specified, as they are not really words.

GNU grep does the same:

	$ echo foo | grep -c ''
	1
	$ echo foo | grep -c -w ''
	0
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* da/pretty-tempname:
  diff: generate pretty filenames in prep_temp_blob()
  compat: add a basename() compatibility function
  compat: add a mkstemps() compatibility function

Conflicts:
	Makefile

This simplifies the logic of rev_compare_tree() by removing a special
case.

It does so by turning the special case of finding a diff to be "all new
files" into a more generic case of "all new" vs "all removed" vs "mixed
changes", so now the code is actually more powerful and more generic, and
the added symmetry actually makes it simpler too.

This makes no changes to any existing behavior, but apart from the
simplification it does make it possible to some day care about whether all
changes were just deletions if we want to. Which we may well want to for
merge handling.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* maint:
  blame: correctly handle a path that used to be a directory
  add -i: do not dump patch during application
  Update draft release notes for 1.6.3.2
  grep: fix colouring of matches with zero length
  Documentation: teach stash/pop workflow instead of stash/apply
  Change xdl_merge to generate output even for null merges
  t6023: merge-file fails to output anything for a degenerate merge

When trying to see if the same path exists in the parent, we ran
"diff-tree" with pathspec set to the path we are interested in with the
parent, and expect either to have exactly one resulting filepair (either
"changed from the parent", "created when there was none") or nothing (when
there is no change from the parent).

If the path used to be a directory, however, we will also see unbounded
number of entries that talk about the files that used to exist underneath
the directory in question.  Correctly pick only the entry that describes
the path we are interested in in such a case (namely, the creation of the
path as a regular file).

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

Remove a debugging print that snuck in at 7a26e653 (Revert
"git-add--interactive: remove hunk coalescing", 2009-05-16).
Signed-off-by: NThomas Rast <trast@student.ethz.ch>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

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

* cb/maint-1.6.0-xdl-merge-fix:
  Change xdl_merge to generate output even for null merges
  t6023: merge-file fails to output anything for a degenerate merge

Conflicts:
	xdiff/xmerge.c

* rs/maint-grep-word-regexp-fix:
  grep: fix colouring of matches with zero length
  grep: fix word-regexp at the beginning of lines

* sb/maint-1.6.2-opt-filename-fix:
  apply, fmt-merge-msg: use relative filenames
  commit: -F overrides -t

* jc/maint-add-p-coalesce-fix:
  t3701: ensure correctly set up repository after skipped tests
  Revert "git-add--interactive: remove hunk coalescing"
  Splitting a hunk that adds a line at the top fails in "add -p"

* tr/maint-doc-stash-pop:
  Documentation: teach stash/pop workflow instead of stash/apply

Previously, die() would report the exit code of stop_httpd. Instead,
save and reset the exit code before dying.
Signed-off-by: NClemens Buchacher <drizzd@aon.at>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Exit trap should not be removed in case tests require cleanup code. This
is especially important if tests are executed with the --immediate option.
Signed-off-by: NClemens Buchacher <drizzd@aon.at>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Previously, unknown options would be ignored, including any subsequent
valid options.
Signed-off-by: NClemens Buchacher <drizzd@aon.at>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

If a zero-length match is encountered, break out of loop and show the rest
of the line uncoloured.  Otherwise we'd be looping forever, trying to make
progress by advancing the pointer by zero characters.
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Copy the description of date-order from rev-list-options.txt, and then
reword it to be commit specific. While we're at it, put <rev> <glob>...
on a new line to not exceed 80 characters.
Signed-off-by: NStephen Boyd <bebarino@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Naturally, prep_temp_blob() did not care about filenames.
As a result, GIT_EXTERNAL_DIFF and textconv generated
filenames such as ".diff_XXXXXX".

This modifies prep_temp_blob() to generate user-friendly
filenames when creating temporary files.

Diffing "name.ext" now generates "XXXXXX_name.ext".
Signed-off-by: NDavid Aguilar <davvid@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Some systems such as Windows lack libgen.h so provide a
basename() implementation for cross-platform use.

This introduces the NO_LIBGEN_H construct to the Makefile
and autoconf scripts.
Signed-off-by: NDavid Aguilar <davvid@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

mkstemps() is a BSD extension so provide an implementation
for cross-platform use.
Signed-off-by: NDavid Aguilar <davvid@gmail.com>
Tested-by: Johannes Sixt <j6t@kdbg.org> (Windows)
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

* sb/opt-filename:
  parse-opts: add OPT_FILENAME and transition builtins
  parse-opts: prepare for OPT_FILENAME

Conflicts:
	builtin-log.c

* jc/solaris-0811:
  OpenSolaris 200811 (SunOS 5.11) does not want OLD_ICONV
  Teach Solaris that _XOPEN_SOURCE=600 really menas XPG6

* sb/show-branch-parse-options:
  show-branch: migrate to parse-options API
  parse-options: add PARSE_OPT_LITERAL_ARGHELP for complicated argh's

Conflicts:
	parse-options.h

* mm/apply-double-slash:
  apply: handle filenames with double slashes better

* sb/format-patch-parseopt:
  format-patch: migrate to parse-options API

Conflicts:
	builtin-log.c

* jc/mktree:
  mktree: validate entry type in input
  mktree --batch: build more than one tree object
  mktree --missing: updated usage message and man page
  mktree --missing: allow missing objects
  t1010: add mktree test
  mktree: do not barf on a submodule commit
  builtin-mktree.c: use a helper function to handle one line of input
  mktree: use parse-options
  build-in git-mktree

* ew/svn-test-and-old-i18n:
  t8005: fix typo, it's ISO-8859-5, not KOI8-R
  t8005: convert CP1251 character set to ISO8859-5
  t8005: use more portable character encoding names
  t5100: use ancient encoding syntax for backwards compatibility
  t9301: use ISO8859-1 rather than ISO-8859-1
  t3901: Use ISO8859-1 instead of ISO-8859-1 for backward compatibility
  t3901: avoid negation on right hand side of '|'
  builtin-mailinfo.c: use "ISO8859-1" instead of "latin1" as fallback encoding
  builtin-mailinfo.c: compare character encodings case insensitively
  Use 'UTF-8' rather than 'utf-8' everywhere for backward compatibility
  t3900: use ancient iconv names for backward compatibility

* mw/send-email:
  send-email: Remove superfluous `my $editor = ...'
  send-email: 'References:' should only reference what is sent
  send-email: Handle "GIT:" rather than "GIT: " during --compose
  Docs: send-email: --smtp-server-port can take symbolic ports
  Docs: send-email: Refer to CONFIGURATION section for sendemail.multiedit
  Docs: send-email: Put options back into alphabetical order

* 'cc/bisect' (early part):
  bisect: check ancestors without forking a "git rev-list" process
  commit: add function to unparse a commit and its parents
  bisect: rework some rev related functions to make them more reusable