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Author SHA1 Message Date
Brandon Casey
f285a2d7ed Replace calls to strbuf_init(&foo, 0) with STRBUF_INIT initializer
Many call sites use strbuf_init(&foo, 0) to initialize local
strbuf variable "foo" which has not been accessed since its
declaration. These can be replaced with a static initialization
using the STRBUF_INIT macro which is just as readable, saves a
function call, and takes up fewer lines.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2008-10-12 12:36:19 -07:00
Heikki Orsila
f18d244a63 Start conforming code to "git subcmd" style part 3
User notifications are presented as 'git cmd', and code comments
are presented as '"cmd"' or 'git's cmd', rather than 'git-cmd'.

Signed-off-by: Heikki Orsila <heikki.orsila@iki.fi>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-09-15 23:11:35 -07:00
Jeff King
0843acfd2c Fix "git log -i --grep"
This has been broken in v1.6.0 due to the reorganization of
the revision option parsing code. The "-i" is completely
ignored, but works fine in "git log --grep -i".

What happens is that the code for "-i" looks for
revs->grep_filter; if it is NULL, we do nothing, since there
are no grep filters. But that is obviously not correct,
since we want it to influence the later --grep option. Doing
it the other way around works, since "-i" just impacts the
existing grep_filter option.

Instead, we now always initialize the grep_filter member and
just fill in options and patterns as we get them. This means
that we can no longer check grep_filter for NULL, but
instead must check the pattern list to see if we have any
actual patterns.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-24 23:28:02 -07:00
Junio C Hamano
679639904d Merge branch 'maint'
* maint:
  GIT 1.5.6.4
  builtin-rm: fix index lock file path
  http-fetch: do not SEGV after fetching a bad pack idx file
  rev-list: honor --quiet option
  api-run-command.txt: typofix
2008-07-19 11:28:06 -07:00
Junio C Hamano
d85fe38959 rev-list: honor --quiet option
Nick Andrew noticed that rev-list lets --quiet option to be parsed by
underlying diff_options parser but did not pick up the result.  This
resulted in --quiet option to become effectively a no-op.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-17 23:36:16 -07:00
Junio C Hamano
588c038ac6 Merge branch 'sb/dashless'
* sb/dashless:
  Make usage strings dash-less
  t/: Use "test_must_fail git" instead of "! git"
  t/test-lib.sh: exit with small negagive int is ok with test_must_fail

Conflicts:
	builtin-blame.c
	builtin-mailinfo.c
	builtin-mailsplit.c
	builtin-shortlog.c
	git-am.sh
	t/t4150-am.sh
	t/t4200-rerere.sh
2008-07-16 17:22:50 -07:00
Junio C Hamano
fa6200fc02 Merge branch 'ph/parseopt-step-blame'
* ph/parseopt-step-blame:
  revisions: refactor handle_revision_opt into parse_revision_opt.
  git-shortlog: migrate to parse-options partially.
  git-blame: fix lapsus
  git-blame: migrate to incremental parse-option [2/2]
  git-blame: migrate to incremental parse-option [1/2]
  revisions: split handle_revision_opt() from setup_revisions()
  parse-opt: add PARSE_OPT_KEEP_ARGV0 parser option.
  parse-opt: fake short strings for callers to believe in.
  parse-opt: do not print errors on unknown options, return -2 intead.
  parse-opt: create parse_options_step.
  parse-opt: Export a non NORETURN usage dumper.
  parse-opt: have parse_options_{start,end}.
  git-blame --reverse
  builtin-blame.c: allow more than 16 parents
  builtin-blame.c: move prepare_final() into a separate function.
  rev-list --children
  revision traversal: --children option
2008-07-13 15:16:35 -07:00
Stephan Beyer
1b1dd23f2d Make usage strings dash-less
When you misuse a git command, you are shown the usage string.
But this is currently shown in the dashed form.  So if you just
copy what you see, it will not work, when the dashed form
is no longer supported.

This patch makes git commands show the dash-less version.

For shell scripts that do not specify OPTIONS_SPEC, git-sh-setup.sh
generates a dash-less usage string now.

Signed-off-by: Stephan Beyer <s-beyer@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-13 14:12:48 -07:00
Junio C Hamano
8bb65883d1 Merge branch 'jc/blame' (early part) into HEAD
* 'jc/blame' (early part):
  git-blame --reverse
  builtin-blame.c: allow more than 16 parents
  builtin-blame.c: move prepare_final() into a separate function.
  rev-list --children
  revision traversal: --children option

Conflicts:

	Documentation/rev-list-options.txt
	revision.c
2008-07-08 15:25:44 -07:00
Adam Brewster
1fc561d169 Move read_revisions_from_stdin from builtin-rev-list.c to revision.c
Reading rev-list parameters from the command line can be reused by
commands other than rev-list.  Move this function to more "library-ish"
place to promote code reuse.

Signed-off-by: Adam Brewster <asb@bu.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-05 17:30:58 -07:00
Junio C Hamano
9bd81e4249 Merge branch 'js/config-cb'
* js/config-cb:
  Provide git_config with a callback-data parameter

Conflicts:

	builtin-add.c
	builtin-cat-file.c
2008-05-25 14:25:02 -07:00
Adam Simpkins
7528f27dd6 log --graph --left-right: show left/right information in place of '*'
With the --graph option, the graph already outputs 'o' instead of '*'
for boundary commits.  Make it emit '<' or '>' when --left-right is
specified.

(This change also disables the '^' prefix for UNINTERESTING commits.
The graph code currently doesn't print anything special for these
commits, since it assumes no UNINTERESTING, non-BOUNDARY commits are
displayed.  This is potentially a bug if UNINTERESTING non-BOUNDARY
commits can actually be displayed via some code path.)

[jc: squashed the left-right change from Dscho and Adam's fixup into one]

Signed-off-by: Adam Simpkins <adam@adamsimpkins.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-05-25 12:06:52 -07:00
Johannes Schindelin
ef90d6d420 Provide git_config with a callback-data parameter
git_config() only had a function parameter, but no callback data
parameter.  This assumes that all callback functions only modify
global variables.

With this patch, every callback gets a void * parameter, and it is hoped
that this will help the libification effort.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-05-14 12:34:44 -07:00
Adam Simpkins
7fefda5cc7 log and rev-list: add --graph option
This new option causes a text-based representation of the history to be
printed to the left of the normal output.

Signed-off-by: Adam Simpkins <adam@adamsimpkins.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-05-05 18:46:35 -07:00
Adam Simpkins
885cf80899 revision API: split parent rewriting and parent printing options
This change allows parent rewriting to be performed without causing
the log and rev-list commands to print the parents.

Signed-off-by: Adam Simpkins <adam@adamsimpkins.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-05-05 17:38:22 -07:00
Junio C Hamano
72276a3ecb rev-list --children
Just like --parents option shows the parents of commits, this shows the
children of commits.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-04-12 19:41:29 -07:00
Kevin Ballard
7ccd366779 Add --reverse to the git-rev-list usage string
git-rev-list accepts --reverse, as documented in
the manpage, but the usage string does not list it.

Signed-off-by: Kevin Ballard <kevin@sb.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-03-19 17:31:51 -07:00
Junio C Hamano
eadbcd498a Merge branch 'mk/maint-parse-careful'
* mk/maint-parse-careful:
  receive-pack: use strict mode for unpacking objects
  index-pack: introduce checking mode
  unpack-objects: prevent writing of inconsistent objects
  unpack-object: cache for non written objects
  add common fsck error printing function
  builtin-fsck: move common object checking code to fsck.c
  builtin-fsck: reports missing parent commits
  Remove unused object-ref code
  builtin-fsck: move away from object-refs to fsck_walk
  add generic, type aware object chain walker

Conflicts:

	Makefile
	builtin-fsck.c
2008-03-02 15:11:07 -08:00
Uwe Kleine-König
a5aa930d50 rev-list: add --branches, --tags and --remotes
These flags are already known to rev-parse and have the same meaning.

This patch allows to run gitk as follows:

	gitk --branches --not --remotes

to show only your local work.

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-29 00:00:29 -08:00
Martin Koegler
7914053ba9 Remove unused object-ref code
Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-25 23:57:35 -08:00
Junio C Hamano
428ae2eff0 Merge branch 'lt/revision-walker'
* lt/revision-walker:
  Add "--show-all" revision walker flag for debugging
2008-02-20 16:13:24 -08:00
Martin Koegler
3d51e1b5b8 check return code of prepare_revision_walk
A failure in prepare_revision_walk can be caused by
a not parseable object.

Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-17 23:51:12 -08:00
Linus Torvalds
3131b71301 Add "--show-all" revision walker flag for debugging
It's really not very easy to visualize the commit walker, because - on
purpose - it obvously doesn't show the uninteresting commits!

This adds a "--show-all" flag to the revision walker, which will make
it show uninteresting commits too, and they'll have a '^' in front of
them (it also fixes a logic error for !verbose_header for boundary
commits - we should show the '-' even if left_right isn't shown).

A separate patch to gitk to teach it the new '^' was sent
to paulus.  With the change in place, it actually is interesting
even for the cases that git doesn't have any problems with, ie
for the kernel you can do:

	gitk -d --show-all v2.6.24..

and you see just how far down it has to parse things to see it all. The
use of "-d" is a good idea, since the date-ordered toposort is much better
at showing why it goes deep down (ie the date of some of those commits
after 2.6.24 is much older, because they were merged from trees that
weren't rebased).

So I think this is a useful feature even for non-debugging - just to
visualize what git does internally more.

When it actually breaks out due to the "everybody_uninteresting()"
case, it adds the uninteresting commits (both the one it's looking at
now, and the list of pending ones) to the list

This way, we really list *all* the commits we've looked at.

Because we now end up listing commits we may not even have been parsed
at all "show_log" and "show_commit" need to protect against commits
that don't have a commit buffer entry.

That second part is debatable just how it should work. Maybe we shouldn't
show such entries at all (with this patch those entries do get shown, they
just don't get any message shown with them). But I think this is a useful
case.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-13 15:59:26 -08:00
Jim Meyering
872c930dcb Don't access line[-1] for a zero-length "line" from fgets.
A NUL byte at beginning of file, or just after a newline
would provoke an invalid buf[-1] access in a few places.

* builtin-grep.c (cmd_grep): Don't access buf[-1].
* builtin-pack-objects.c (get_object_list): Likewise.
* builtin-rev-list.c (read_revisions_from_stdin): Likewise.
* bundle.c (read_bundle_header): Likewise.
* server-info.c (read_pack_info_file): Likewise.
* transport.c (insert_packed_refs): Likewise.

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-01-04 12:28:58 -08:00
Junio C Hamano
761e8566cb Merge branch 'lt/rev-list-interactive'
* lt/rev-list-interactive:
  Fix parent rewriting in --early-output
  revision walker: mini clean-up
  Enhance --early-output format
  Add "--early-output" log flag for interactive GUI use
  Simplify topo-sort logic
2007-11-18 16:03:24 -08:00
Linus Torvalds
7dc0fe3be5 Fix parent rewriting in --early-output
We cannot tell a node that has been checked and found not to be
interesting (which does not have the TREECHANGE flag) from a
node that hasn't been checked if it is interesting or not,
without relying on something else, such as object->parsed.

But an object can get the "parsed" flag for other reasons.
Which means that "TREECHANGE" has the wrong polarity.

This changes the way how the path pruning logic marks an
uninteresting commits.  From now on, we consider a commit
interesting by default, and explicitly mark the ones we decided
to prune.  The flag is renamed to "TREESAME".

Then, this fixes the logic to show the early output with
incomplete pruning.  It basically says "a commit that has
TREESAME set is kind-of-UNINTERESTING", but obviously in a
different way than an outright UNINTERESTING commit.  Until we
parse and examine enough parents to determine if a commit
becomes surely "kind-of-UNINTERESTING", we avoid rewriting
the ancestry so that later rounds can fix things up.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-14 03:59:37 -08:00
Shawn O. Pearce
27350891de rev-list: Introduce --quiet to avoid /dev/null redirects
Some uses of git-rev-list are to run it with --objects to see if
a range of objects between two or more commits is fully connected
or not.  In such a case the caller doesn't care about the actual
object names or hash hints so formatting this data only for it to
be dumped to /dev/null by a redirect is a waste of CPU time.  If
all the caller needs is the exit status then --quiet can be used
to bypass the commit and object formatting.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2007-11-11 17:09:55 -08:00
Linus Torvalds
53b2c823f6 revision walker: mini clean-up
This removes the unnecessary indirection of "revs->prune_fn",
since that function is always the same one (or NULL), and there
is in fact not even an abstraction reason to make it a function
(i.e. its not called from some other file and doesn't allow us
to keep the function itself static or anything like that).

It then just replaces it with a bit that says "prune or not",
and if not pruning, every commit gets TREECHANGE.

That in turn means that

 - if (!revs->prune_fn || (flags & TREECHANGE))
 - if (revs->prune_fn && !(flags & TREECHANGE))

just become

 - if (flags & TREECHANGE)
 - if (!(flags & TREECHANGE))

respectively.

Together with adding the "single_parent()" helper function, the "complex"
conditional now becomes

	if (!(flags & TREECHANGE) && rev->dense && single_parent(commit))
		continue;

Also indirection of "revs->dense" checking is thrown away the
same way, because TREECHANGE bit is set appropriately now.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-05 18:19:28 -08:00
Junio C Hamano
4593fb8405 format-patch -s: add MIME encoding header if signer's name requires so
When the body of the commit log message contains a non-ASCII character,
format-patch correctly emitted the encoding header to mark the resulting
message as such.  However, if the original message was fully ASCII, the
command line switch "-s" was given to add a new sign-off, and
the signer's name was not ASCII only, the resulting message would have
contained non-ASCII character but was not marked as such.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-01 17:18:39 -07:00
Christian Couder
50e62a8e70 rev-list: implement --bisect-all
This is Junio's patch with some stuff to make --bisect-all
compatible with --bisect-vars.

This option makes it possible to see all the potential
bisection points. The best ones are displayed first.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
2007-10-26 23:27:23 -07:00
Junio C Hamano
cc61ae82ec Merge branch 'mv/unknown'
* mv/unknown:
  Don't use "<unknown>" for placeholders and suppress printing of empty user formats.
2007-10-03 04:28:24 -07:00
Junio C Hamano
66d4035e10 Merge branch 'ph/strbuf'
* ph/strbuf: (44 commits)
  Make read_patch_file work on a strbuf.
  strbuf_read_file enhancement, and use it.
  strbuf change: be sure ->buf is never ever NULL.
  double free in builtin-update-index.c
  Clean up stripspace a bit, use strbuf even more.
  Add strbuf_read_file().
  rerere: Fix use of an empty strbuf.buf
  Small cache_tree_write refactor.
  Make builtin-rerere use of strbuf nicer and more efficient.
  Add strbuf_cmp.
  strbuf_setlen(): do not barf on setting length of an empty buffer to 0
  sq_quote_argv and add_to_string rework with strbuf's.
  Full rework of quote_c_style and write_name_quoted.
  Rework unquote_c_style to work on a strbuf.
  strbuf API additions and enhancements.
  nfv?asprintf are broken without va_copy, workaround them.
  Fix the expansion pattern of the pseudo-static path buffer.
  builtin-for-each-ref.c::copy_name() - do not overstep the buffer.
  builtin-apply.c: fix a tiny leak introduced during xmemdupz() conversion.
  Use xmemdupz() in many places.
  ...
2007-10-03 03:06:02 -07:00
Michal Vitecek
55246aac67 Don't use "<unknown>" for placeholders and suppress printing of empty user formats.
This changes the interporate() to replace entries with NULL values
by the empty string, and uses it to interpolate missing fields in
custom format output used in git-log and friends.  It is most useful
to avoid <unknown> output from %b format for a commit log message
that lack any body text.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-26 00:40:47 -07:00
Christian Couder
17ed158021 rev-list --bisect: Fix best == NULL case.
Earlier commit ce0cbad77 broke rev-list --bisect to cause it
segfault when the resulting set is empty.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-20 00:10:48 -07:00
Junio C Hamano
39bd2eb56a Merge branch 'master' into ph/strbuf
* master: (94 commits)
  Fixed update-hook example allow-users format.
  Documentation/git-svn: updated design philosophy notes
  t/t4014: test "am -3" with mode-only change.
  git-commit.sh: Shell script cleanup
  preserve executable bits in zip archives
  Fix lapsus in builtin-apply.c
  git-push: documentation and tests for pushing only branches
  git-svnimport: Use separate arguments in the pipe for git-rev-parse
  contrib/fast-import: add perl version of simple example
  contrib/fast-import: add simple shell example
  rev-list --bisect: Bisection "distance" clean up.
  rev-list --bisect: Move some bisection code into best_bisection.
  rev-list --bisect: Move finding bisection into do_find_bisection.
  Document ls-files --with-tree=<tree-ish>
  git-commit: partial commit of paths only removed from the index
  git-commit: Allow partial commit of file removal.
  send-email: make message-id generation a bit more robust
  git-apply: fix whitespace stripping
  git-gui: Disable native platform text selection in "lists"
  apply --index-info: fall back to current index for mode changes
  ...
2007-09-18 17:42:15 -07:00
Christian Couder
53271411e7 rev-list --bisect: Bisection "distance" clean up.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-18 02:58:23 -07:00
Christian Couder
77c11e064c rev-list --bisect: Move some bisection code into best_bisection.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-18 02:58:20 -07:00
Christian Couder
ce0cbad772 rev-list --bisect: Move finding bisection into do_find_bisection.
This factorises some code and make a big function smaller.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-18 02:58:13 -07:00
Pierre Habouzit
674d172730 Rework pretty_print_commit to use strbufs instead of custom buffers.
Also remove the "len" parameter, as:
  (1) it was used as a max boundary, and every caller used ~0u
  (2) we check for final NUL no matter what, so it doesn't help for speed.

  As a result most of the pp_* function takes 3 arguments less, and we need
a lot less local variables, this makes the code way more readable, and
easier to extend if needed.

  This patch also fixes some spacing and cosmetic issues.

  This patch also fixes (as a side effect) a memory leak intoruced in
builtin-archive.c at commit df4a394f (fmt was xmalloc'ed and not free'd)

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-10 12:49:50 -07:00
Junio C Hamano
4b7f59af2a Merge branch 'maint'
* maint:
  rev-list --bisect: fix allocation of "int*" instead of "int".
2007-07-31 21:12:32 -07:00
Christian Couder
4e0b2bbc57 rev-list --bisect: fix allocation of "int*" instead of "int".
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-31 21:07:39 -07:00
Junio C Hamano
1ed84157a2 Revert 88494423 (removal of duplicate parents in the output codepath)
Now this is not needed, as we rewrite the parent list in the commit
object itself.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-07-08 23:18:22 -07:00
Theodore Ts'o
06f59e9f5d Don't fflush(stdout) when it's not helpful
This patch arose from a discussion started by Jim Meyering's patch
whose intention was to provide better diagnostics for failed writes.
Linus proposed a better way to do things, which also had the added
benefit that adding a fflush() to git-log-* operations and incremental
git-blame operations could improve interactive respose time feel, at
the cost of making things a bit slower when we aren't piping the
output to a downstream program.

This patch skips the fflush() calls when stdout is a regular file, or
if the environment variable GIT_FLUSH is set to "0".  This latter can
speed up a command such as:

GIT_FLUSH=0 strace -c -f -e write time git-rev-list HEAD | wc -l

a tiny amount.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-30 20:16:12 -07:00
Junio C Hamano
80583c0ef6 Lift 16kB limit of log message output
Traditionally we had 16kB limit when formatting log messages for
output, because it was easier to arrange for the caller to have
a reasonably big buffer and pass it down without ever worrying
about reallocating.

This changes the calling convention of pretty_print_commit() to
lift this limit.  Instead of the buffer and remaining length, it
now takes a pointer to the pointer that points at the allocated
buffer, and another pointer to the location that stores the
allocated length, and reallocates the buffer as necessary.

To support the user format, the error return of interpolate()
needed to be changed.  It used to return a bool telling "Ok the
result fits", or "Sorry, I had to truncate it".  Now it returns
0 on success, and returns the size of the buffer it wants in
order to fit the whole result.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-06-13 00:41:21 -07:00
Junio C Hamano
a7b02ccf9a Add --date={local,relative,default}
This adds --date={local,relative,default} option to log family of commands,
to allow displaying timestamps in user's local timezone, relative time, or
the default format.

Existing --relative-date option is a synonym of --date=relative; we could
probably deprecate it in the long run.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-25 21:39:43 -07:00
Junio C Hamano
b9849a1ab6 Make sure quickfetch is not fooled with a previous, incomplete fetch.
This updates git-rev-list --objects to be a bit more careful
when listing a blob object to make sure the blob actually
exists, and uses it to make sure the quick-fetch optimization we
introduced earlier is not fooled by a previous incomplete fetch.

The quick-fetch optimization works by running this command:

	git rev-list --objects <<commit-list>> --not --all

where <<commit-list>> is a list of commits that we are going to
fetch from the other side.  If there is any object missing to
complete the <<commit-list>>, the rev-list would fail and die
(say, the commit was in our repository, but its tree wasn't --
then it will barf while trying to list the blobs the tree
contains because it cannot read that tree).

Usually we do not have the objects (otherwise why would we
fetching?), but in one important special case we do: when the
remote repository is used as an alternate object store
(i.e. pointed by .git/objects/info/alternates).  We could check
.git/objects/info/alternates to see if the remote we are
interacting with is one of them (or is used as an alternate,
recursively, by one of them), but that check is more cumbersome
than it is worth.

The above check however did not catch missing blob, because
object listing code did not read nor check blob objects, knowing
that blobs do not contain any further references to other
objects.  This commit fixes it with practically unmeasurable
overhead.

I've benched this with

	git rev-list --objects --all >/dev/null

in the kernel repository, with three different implementations
of the "check-blob".

 - Checking with has_sha1_file() has negligible (unmeasurable)
   performance penalty.

 - Checking with sha1_object_info() makes it somewhat slower,
   perhaps by 5%.

 - Checking with read_sha1_file() to cause a fully re-validation
   is prohibitively expensive (about 4 times as much runtime).

In my original patch, I had this as a command line option, but
the overhead is small enough that it is not really worth it.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-17 00:14:59 -07:00
Junio C Hamano
77e6f5bc10 Merge branch 'maint'
* maint:
  Fix lseek(2) calls with args 2 and 3 swapped
  Honor -p<n> when applying git diffs
  Fix dependency of common-cmds.h
  Fix renaming branch without config file
  DESTDIR support for git/contrib/emacs
  gitweb: Fix bug in "blobdiff" view for split (e.g. file to symlink) patches
  Document --left-right option to rev-list.
  Revert "builtin-archive: use RUN_SETUP"
  rename contrib/hooks/post-receieve-email to contrib/hooks/post-receive-email.
  rerere: make sorting really stable.
  Fix t4200-rerere for white-space from "wc -l"
2007-04-05 16:34:51 -07:00
Brian Gernhardt
b24bace5ca Document --left-right option to rev-list.
Explanation is paraphrased from "577ed5c... rev-list --left-right"

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-04-05 14:12:41 -07:00
Junio C Hamano
1daa09d9a8 make the previous optimization work also on path-limited rev-list --bisect
The trick is to give a child commit that is not tree-changing
the same depth as its parent, so that the depth is propagated
properly along strand of pearls.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-03-23 23:38:32 -07:00
Junio C Hamano
2a4646904a rev-list --bisect: Fix "halfway" optimization.
If you have 5 commits in the set, commits that reach 2 or 3
commits are at halfway.  If you have 6 commits, only commits
that reach exactly 3 commits are at halfway.  The earlier one is
completely botched the math.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-03-23 23:38:32 -07:00