Commit Graph

32323 Commits

Author SHA1 Message Date
Junio C Hamano
7d2726c393 Merge branch 'rs/zip-compresssed-size-with-export-subst' into maint
When export-subst is used, "zip" output recorded incorrect
size of the file.

* rs/zip-compresssed-size-with-export-subst:
  archive-zip: fix compressed size for stored export-subst files
2013-03-26 12:43:49 -07:00
Junio C Hamano
d7cccbb3bb Merge branch 'jk/utf-8-can-be-spelled-differently' into maint
Some platforms and users spell UTF-8 differently; retry with the
most official "UTF-8" when the system does not understand the
user-supplied encoding name that are the common alternative
spellings of UTF-8.

* jk/utf-8-can-be-spelled-differently:
  utf8: accept alternate spellings of UTF-8
2013-03-26 12:43:25 -07:00
Junio C Hamano
307d68e275 Merge branch 'nd/branch-error-cases' into maint
"git branch" had more cases where it did not bother to check
nonsense command line parameters.

* nd/branch-error-cases:
  branch: segfault fixes and validation
2013-03-26 12:43:05 -07:00
Junio C Hamano
6201eb3e65 Merge branch 'ap/maint-update-index-h-is-for-help' into maint
"git update-index -h" did not do the usual "-h(elp)" thing.

* ap/maint-update-index-h-is-for-help:
  update-index: allow "-h" to also display options
2013-03-26 12:42:42 -07:00
Junio C Hamano
06d7abb13c Merge branch 'jc/perl-cat-blob' into maint
perl/Git.pm::cat_blob slurped everything in core only to write it
out to a file descriptor, which was not a very smart thing to do.

* jc/perl-cat-blob:
  Git.pm: fix cat_blob crashes on large files
2013-03-26 12:42:24 -07:00
Junio C Hamano
2a5964afa6 Merge branch 'ob/imap-send-ssl-verify' into maint
Correctly connect to SSL/TLS sites that serve multiple hostnames on
a single IP by including Server Name Indication in the client-hello.

* ob/imap-send-ssl-verify:
  imap-send: support Server Name Indication (RFC4366)
2013-03-26 12:41:59 -07:00
Junio C Hamano
4bb2121c17 Merge branch 'nd/index-pack-l10n-buf-overflow' into maint
* nd/index-pack-l10n-buf-overflow:
  index-pack: fix buffer overflow caused by translations
2013-03-26 12:40:19 -07:00
Junio C Hamano
f4bdb255f6 Merge branch 'jc/maint-push-refspec-default-doc' into maint
* jc/maint-push-refspec-default-doc:
  Documentation/git-push: clarify the description of defaults
2013-03-26 12:40:14 -07:00
Junio C Hamano
273ca55907 Merge branch 'wk/user-manual-literal-format' into maint
* wk/user-manual-literal-format:
  user-manual: Standardize backtick quoting
2013-03-26 12:40:11 -07:00
Junio C Hamano
c17866d7b6 Merge branch 'gp/avoid-explicit-mention-of-dot-git-refs' into maint
* gp/avoid-explicit-mention-of-dot-git-refs:
  Fix ".git/refs" stragglers
2013-03-26 12:40:04 -07:00
Junio C Hamano
1d66383579 Merge branch 'jc/maint-reflog-expire-clean-mark-typofix' into maint
In "git reflog expire", REACHABLE bit was not cleared from the
correct objects.

* jc/maint-reflog-expire-clean-mark-typofix:
  reflog: fix typo in "reflog expire" clean-up codepath
2013-03-26 12:39:51 -07:00
Junio C Hamano
bd2f371d34 attr.c::path_matches(): the basename is part of the pathname
The function takes two strings (pathname and basename) as if they
are independent strings, but in reality, the latter is always
pointing into a substring in the former.

Clarify this relationship by expressing the latter as an offset into
the former.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-26 11:09:01 -07:00
Dan Bornstein
e39c695d87 Correct the docs about GIT_SSH.
In particular, it can get called with four arguments if you happen to
be referring to a repo using the ssh:// scheme with a non-default port
number.

Signed-off-by: Dan Bornstein <danfuzz@milk.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-26 07:53:13 -07:00
Junio C Hamano
1252f8b29f Start preparing for 1.8.2.1
... at the same time, preparation for 1.8.1.6 also has started ;-)

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-25 13:51:13 -07:00
Junio C Hamano
25396a535b Merge branch 'jk/graph-c-expose-symbols-for-cgit' into maint
In the v1.8.0 era, we changed symbols that do not have to be global
to file scope static, but a few functions in graph.c were used by
CGit from sideways bypassing the entry points of the API the
in-tree users use.

* jk/graph-c-expose-symbols-for-cgit:
  Revert "graph.c: mark private file-scope symbols as static"
2013-03-25 13:48:39 -07:00
Junio C Hamano
f7b1ad870c Merge branch 'maint-1.8.1' into maint
* maint-1.8.1:
  bundle: Add colons to list headings in "verify"
  bundle: Fix "verify" output if history is complete
  Documentation: filter-branch env-filter example
  git-filter-branch.txt: clarify ident variables usage
  git-compat-util.h: Provide missing netdb.h definitions
  describe: Document --match pattern format
  Documentation/githooks: Explain pre-rebase parameters
  update-index: list supported idx versions and their features
  diff-options: unconfuse description of --color
  read-cache.c: use INDEX_FORMAT_{LB,UB} in verify_hdr()
  index-format.txt: mention of v4 is missing in some places
2013-03-25 13:46:42 -07:00
Junio C Hamano
7c1017d2d5 Merge branch 'lf/bundle-verify-list-prereqs' into maint-1.8.1
"git bundle verify" did not say "records a complete history" for a
bundle that does not have any prerequisites.

* lf/bundle-verify-list-prereqs:
  bundle: Add colons to list headings in "verify"
  bundle: Fix "verify" output if history is complete
2013-03-25 13:46:02 -07:00
Junio C Hamano
a12816b7dc Merge branch 'tk/doc-filter-branch' into maint-1.8.1
Add an example use of "--env-filter" in "filter-branch"
documentation.

* tk/doc-filter-branch:
  Documentation: filter-branch env-filter example
  git-filter-branch.txt: clarify ident variables usage
2013-03-25 13:45:53 -07:00
Junio C Hamano
2b0dda5318 Merge branch 'dm/ni-maxhost-may-be-missing' into maint-1.8.1
Some sources failed to compile on systems that lack NI_MAXHOST in
their system header.

* dm/ni-maxhost-may-be-missing:
  git-compat-util.h: Provide missing netdb.h definitions
2013-03-25 13:45:42 -07:00
Junio C Hamano
402c2a7ea1 Merge branch 'gp/describe-match-uses-glob-pattern' into maint-1.8.1
The "--match=<pattern>" argument "git describe" takes uses glob
pattern but it wasn't obvious from the documentation.

* gp/describe-match-uses-glob-pattern:
  describe: Document --match pattern format
2013-03-25 13:45:33 -07:00
Junio C Hamano
a7b6ad5e90 Merge branch 'nd/doc-index-format' into maint-1.8.1
The v4 index format was not documented.

* nd/doc-index-format:
  update-index: list supported idx versions and their features
  read-cache.c: use INDEX_FORMAT_{LB,UB} in verify_hdr()
  index-format.txt: mention of v4 is missing in some places
2013-03-25 13:45:26 -07:00
Junio C Hamano
8ddd9c18f3 Merge branch 'wk/doc-pre-rebase' into maint-1.8.1
The arguments given to pre-rebase hook were not documented.

* wk/doc-pre-rebase:
  Documentation/githooks: Explain pre-rebase parameters
2013-03-25 13:45:14 -07:00
Junio C Hamano
82b955c513 Merge branch 'jc/color-diff-doc' into maint-1.8.1
The "--color=<when>" argument to the commands in the diff family
was described poorly.

* jc/color-diff-doc:
  diff-options: unconfuse description of --color
2013-03-25 13:44:53 -07:00
Junio C Hamano
04fe1184fd transport.c: help gcc 4.6.3 users by squelching compiler warning
To a human reader, it is quite obvious that cmp is assigned before
it is used, but gcc 4.6.3 that ships with Ubuntu 12.04 is among
those that do not get this right.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-25 12:51:50 -07:00
René Scharfe
d8febde370 match-trees: simplify score_trees() using tree_entry()
Convert the loop in score_trees() to tree_entry().  The code becomes
shorter and simpler because the calls to update_tree_entry() are not
needed any more.

Another benefit is that we need less variables to track the current
tree entries; as a side-effect of that the compiler has an easier
job figuring out the control flow and thus can avoid false warnings
about uninitialized variables.

Using struct name_entry also allows the use of tree_entry_len() for
finding the path length instead of strlen(), which may be slightly
more efficient.

Also unify the handling of missing entries in one of the two trees
(i.e. added or removed files): Just set cmp appropriately first, no
matter if we ran off the end of a tree or if we actually have two
entries to compare, and check its value a bit later without
duplicating the handler code.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-25 09:00:30 -07:00
Kacper Kornet
c19d1b4e84 Fix revision walk for commits with the same dates
Logic in still_interesting function allows to stop the commits
traversing if the oldest processed commit is not older then the
youngest commit on the list to process and the list contains only
commits marked as not interesting ones. It can be premature when dealing
with a set of coequal commits. For example git rev-list A^! --not B
provides wrong answer if all commits in the range A..B had the same
commit time and there are more then 7 of them.

To fix this problem the relevant part of the logic in still_interesting
is changed to: the walk can be stopped if the oldest processed commit is
younger then the youngest commit on the list to processed.

Signed-off-by: Kacper Kornet <draenog@pld-linux.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-22 16:15:48 -07:00
Jeff King
837154978e submodule: clarify logic in show_submodule_summary
There are two uses of the "left" and "right" commit variables that
make it hard to be sure what values they have (both for the reader,
and for gcc, which wrongly complains that they might be used
uninitialized).

The function starts with a cascading if statement, checking that the
input sha1s exist, and finally working up to preparing a revision
walk. We only prepare the walk if the cascading conditional did not
find any problems, which we check by seeing whether it set the
"message" variable or not. It's simpler and more obvious to just add
a condition to the end of the cascade.

Later, we check the same "message" variable when deciding whether to
clear commit marks on the left/right commits; if it is set, we
presumably never started the walk. This is wrong, though; we might
have started the walk and munged commit flags, only to encounter an
error afterwards. We should always clear the flags on left/right if
they exist, whether the walk was successful or not.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-22 14:09:55 -07:00
Junio C Hamano
77c72780ed Documentation: merging a tag is a special case
When asking Git to merge a tag (such as a signed tag or annotated tag),
it will always create a merge commit even if fast-forward was possible.
It's like having --no-ff present on the command line.

It's a difference from the default behavior described in git-merge.txt.
It should be documented as an exception of "FAST-FORWARD MERGE" section
and "--ff" option description.

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 15:47:38 -07:00
Junio C Hamano
bb9f2aecf0 CodingGuidelines: our documents are in AsciiDoc
Before talking about notations such as optional [--option] enclosed
in brackets, state that the documents are in AsciiDoc and processed
into other formats.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:17:32 -07:00
Max Nanasy
c9fc4415e2 diff.c: diff.renamelimit => diff.renameLimit in message
In the warning message printed when rename or unmodified copy
detection was skipped due to too many files, change "diff.renamelimit"
to "diff.renameLimit", in order to make it consistent with git
documentation, which consistently uses "diff.renameLimit".

Signed-off-by: Max Nanasy <max.nanasy@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:06:49 -07:00
Jeff King
b8527d5fa6 wt-status: fix possible use of uninitialized variable
In wt_status_print_change_data, we accept a change_type flag
that is meant to be either WT_STATUS_UPDATED or
WT_STATUS_CHANGED.  We then switch() on this value to set
the local variable "status" for each case, but do not
provide a fallback "default" label to the switch statement.

As a result, the compiler realizes that "status" might be
unset, and complains with a warning. To silence this
warning, we use the "int status = status" trick.  This is
correct with the current code, as all callers provide one of
the two expected change_type flags. However, it's also a
maintenance trap, as there is nothing to prevent future
callers from passing another flag, nor to document this
assumption.

Instead of using the "x = x" hack, let's handle the default
case in the switch() statement with a die("BUG"). That tells
the compiler and any readers of the code exactly what the
function's input assumptions are.

We could also convert the flag to an enum, which would
provide a compile-time check on the function input. However,
since these flags are part of a larger enum, that would make
the code unnecessarily complex (we would have to make a new
enum with just the two flags, and then convert it to the old
enum for passing to sub-functions).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:06:49 -07:00
Jeff King
3aa99df802 fast-import: clarify "inline" logic in file_change_m
When we read a fast-import line like:

  M 100644 :1 foo.c

we point the local object_entry variable "oe" to the object
named by the mark ":1". When the input uses the "inline"
construct, however, we do not have such an object_entry.

The current code is careful not to access "oe" in the inline
case, but we can make the assumption even more obvious (and
catch violations of it) by setting oe to NULL and adding a
comment. As a bonus, this also squelches an over-zealous gcc
-Wuninitialized warning, which means we can drop the "oe =
oe" initialization hack.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:06:49 -07:00
Jeff King
25043d8aea run-command: always set failed_errno in start_command
When we fail to fork, we set the failed_errno variable to
the value of errno so it is not clobbered by later syscalls.
However, we do so in a conditional, and it is hard to see
later under what conditions the variable has a valid value.

Instead of setting it only when fork fails, let's just
always set it after forking. This is more obvious for human
readers (as we are no longer setting it as a side effect of
a strerror call), and it is more obvious to gcc, which no
longer generates a spurious -Wuninitialized warning. It also
happens to match what the WIN32 half of the #ifdef does.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:06:48 -07:00
Jeff King
c5d5c9a9a3 transport: drop "int cmp = cmp" hack
According to 47ec794, this initialization is meant to
squelch an erroneous uninitialized variable warning from gcc
4.0.1.  That version is quite old at this point, and gcc 4.1
and up handle it fine, with one exception. There seems to be
a regression in gcc 4.6.3, which produces the warning;
however, gcc versions 4.4.7 and 4.7.2 do not.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:06:44 -07:00
Jeff King
cbfd5e1cbb drop some obsolete "x = x" compiler warning hacks
In cases where the setting and access of a variable are
protected by the same conditional flag, older versions of
gcc would generate a "might be used unitialized" warning. We
silence the warning by initializing the variable to itself,
a hack that gcc recognizes.

Modern versions of gcc are smart enough to get this right,
going back to at least version 4.3.5. gcc 4.1 does get it
wrong in both cases, but is sufficiently old that we
probably don't need to care about it anymore.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:06:38 -07:00
Jeff King
4db34cc134 fast-import: use pointer-to-pointer to keep list tail
This is shorter, idiomatic, and it means the compiler does
not get confused about whether our "e" pointer is valid,
letting us drop the "e = e" hack.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:06:19 -07:00
Ramkumar Ramachandra
0d158ebb92 t3200 (branch): modernize style
Style is inconsistent throughout the file.  Make the following
changes:

1. Indent everything with tabs.

2. Put the opening quote (') for the test in the same line as
   test_expect_success, and the closing quote on a line by itself.

3. Do not add extra space between redirection operator and filename,
   i.e. "cmd >dst", not "cmd > dst".

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-20 13:42:49 -07:00
Jeff King
57165db003 index-pack: always zero-initialize object_entry list
Commit 38a4556 (index-pack: start learning to emulate
"verify-pack -v", 2011-06-03) added a "delta_depth" counter
to each "struct object_entry". Initially, all object entries
have their depth set to 0; in resolve_delta, we then set the
depth of each delta to "base + 1". Base entries never have
their depth touched, and remain at 0.

To ensure that all depths start at 0, that commit changed
calls to xmalloc the object_entry list into calls to
xcalloc.  However, it forgot that we grow the list with
xrealloc later. These extra entries are used when we add an
object from elsewhere to complete a thin pack. If we add a
non-delta object, its depth value will just be uninitialized
heap data.

This patch fixes it by zero-initializing entries we add to
the objects list via the xrealloc.

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-20 12:53:26 -07:00
Johannes Sixt
8be412a723 t2003: work around path mangling issue on Windows
MSYS bash considers the part "/g" in the sed expression "s/./=/g" as an
absolute path after an assignment, and mangles it to a C:/something
string. Do not attract bash's attention by avoiding the equals sign.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-20 10:10:28 -07:00
Ramkumar Ramachandra
3f21fb99ab t4018,7810,7811: remove test_config() redefinition
test_config() is already a well-defined function in
test-lib-functions.sh.  Don't duplicate it unnecessarily.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-19 09:10:15 -07:00
Thomas Rast
8f82aad4e7 index-pack: guard nr_resolved_deltas reads by lock
The threaded parts of index-pack increment the number of resolved
deltas in nr_resolved_deltas guarded by counter_mutex.  However, the
per-thread outer loop accessed nr_resolved_deltas without any locks.

This is not wrong as such, since it doesn't matter all that much
whether we get an outdated value.  However, unless someone proves that
this one lock makes all the performance difference, it would be much
cleaner to guard _all_ accesses to the variable with the lock.

The only such use is display_progress() in the threaded section (all
others are in the conclude_pack() callchain outside the threaded
part).  To make it obvious that it cannot deadlock, move it out of
work_mutex.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Reviewed-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-19 08:40:47 -07:00
Nguyễn Thái Ngọc Duy
3aba2fddcb index-pack: protect deepest_delta in multithread code
deepest_delta is a global variable but is updated without protection
in resolve_delta(), a multithreaded function. Add a new mutex for it,
but only protect and update when it's actually used (i.e. show_stat is
non-zero).

Another variable that will not be updated is delta_depth in "struct
object_entry" as it's only useful when show_stat is 1. Putting it in
"if (show_stat)" makes it clearer.

The local variable "stat" is renamed to "show_stat" after moving to
global scope because the name "stat" conflicts with stat(2) syscall.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-19 08:40:19 -07:00
Michael Haggerty
c29c46fa2e pack-refs: add fully-peeled trait
Older versions of pack-refs did not write peel lines for
refs outside of refs/tags. This meant that on reading the
pack-refs file, we might set the REF_KNOWS_PEELED flag for
such a ref, even though we do not know anything about its
peeled value.

The previous commit updated the writer to always peel, no
matter what the ref is. That means that packed-refs files
written by newer versions of git are fine to be read by both
old and new versions of git. However, we still have the
problem of reading packed-refs files written by older
versions of git, or by other implementations which have not
yet learned the same trick.

The simplest fix would be to always unset the
REF_KNOWS_PEELED flag for refs outside of refs/tags that do
not have a peel line (if it has a peel line, we know it is
valid, but we cannot assume a missing peel line means
anything). But that loses an important optimization, as
upload-pack should not need to load the object pointed to by
refs/heads/foo to determine that it is not a tag.

Instead, we add a "fully-peeled" trait to the packed-refs
file. If it is set, we know that we can trust a missing peel
line to mean that a ref cannot be peeled. Otherwise, we fall
back to assuming nothing.

[commit message and tests by Jeff King <peff@peff.net>]

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-18 08:06:28 -07:00
Junio C Hamano
1c71541ddd Merge branch 'maint'
* maint:
  t1507: Test that branchname@{upstream} is interpreted as branch
2013-03-17 15:39:43 -07:00
Kacper Kornet
617cf93182 t1507: Test that branchname@{upstream} is interpreted as branch
Syntax branchname@{upstream} should interpret its argument as a name of
a branch. Add the test to check that it doesn't try to interpret it as a
refname if the branch in question does not exist.

Signed-off-by: Kacper Kornet <draenog@pld-linux.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-17 15:38:23 -07:00
Jeff King
03a8eddfd1 pack-refs: write peeled entry for non-tags
When we pack an annotated tag ref, we write not only the
sha1 of the tag object along with the ref, but also the sha1
obtained by peeling the tag. This lets readers of the
pack-refs file know the peeled value without having to
actually load the object, speeding up upload-pack's ref
advertisement.

The writer marks a packed-refs file with peeled refs using
the "peeled" trait at the top of the file. When the reader
sees this trait, it knows that each ref is either followed
by its peeled value, or it is not an annotated tag.

However, there is a mismatch between the assumptions of the
reader and writer. The writer will only peel refs under
refs/tags, but the reader does not know this; it will assume
a ref without a peeled value must not be a tag object. Thus
an annotated tag object placed outside of the refs/tags
hierarchy will not have its peeled value printed by
upload-pack.

The simplest way to fix this is to start writing peel values
for all refs. This matches what the reader expects for both
new and old versions of git.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-17 12:52:20 -07:00
Jeff King
f7892d1817 use parse_object_or_die instead of die("bad object")
Some call-sites do:

  o = parse_object(sha1);
  if (!o)
	  die("bad object %s", some_name);

We can now handle that as a one-liner, and get more
consistent output.

In the third case of this patch, it looks like we are losing
information, as the existing message also outputs the sha1
hex; however, parse_object will already have written a more
specific complaint about the sha1, so there is no point in
repeating it here.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-17 12:52:14 -07:00
Jeff King
75a9549047 avoid segfaults on parse_object failure
Many call-sites of parse_object assume that they will get a
non-NULL return value; this is not the case if we encounter
an error while parsing the object.

This patch adds a wrapper function around parse_object that
handles dying automatically, and uses it anywhere we
immediately try to access the return value as a non-NULL
pointer (i.e., anywhere that we would currently segfault).

This wrapper may also be useful in other places. The most
obvious one is code like:

  o = parse_object(sha1);
  if (!o)
	  die(...);

However, these should not be mechanically converted to
parse_object_or_die, as the die message is sometimes
customized. Later patches can address these sites on a
case-by-case basis.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-17 12:49:03 -07:00
Junio C Hamano
bb79a827a2 Merge branch 'maint'
* maint:
  rev-parse: clarify documentation of $name@{upstream} syntax
  sha1_name: pass object name length to diagnose_invalid_sha1_path()
  Makefile: keep LIB_H entries together and sorted
2013-03-17 00:11:11 -07:00
Kacper Kornet
47e329ef7c rev-parse: clarify documentation of $name@{upstream} syntax
"git rev-parse" interprets string in string@{upstream} as a name of
a branch not a ref. For example, refs/heads/master@{upstream} looks
for an upstream branch that is merged by git-pull to ref
refs/heads/refs/heads/master not to refs/heads/master.

However the documentation could mislead a user to believe that the
string is interpreted as ref.

Signed-off-by: Kacper Kornet <draenog@pld-linux.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-17 00:10:59 -07:00