Commit Graph

16036 Commits

Author SHA1 Message Date
Gustaf Hendeby
e5b5c1d2cf Document clarification: gitmodules, gitattributes
The SYNOPSIS section of gitattibutes and gitmodule fail to clearly
specify the name of the in tree files used.  This patch brings in the
initial `.' and the fact that the `.gitmodules' file should reside at
the top-level of the working tree.

Signed-off-by: Gustaf Hendeby <hendeby@isy.liu.se>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-31 16:31:58 -07:00
Alex Riesen
f0e90716d4 Add help.autocorrect to enable/disable autocorrecting
It is off(0) by default, to avoid scaring people unless they asked to.
If set to a non-0 value, wait for that amount of deciseconds before
running the corrected command.

Suggested by Junio, so he has a chance to hit Ctrl-C.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-31 10:15:13 -07:00
Johannes Schindelin
8af84dadb1 git wrapper: DWIM mistyped commands
This patch introduces a modified Damerau-Levenshtein algorithm into
Git's code base, and uses it with the following penalties to show some
similar commands when an unknown command was encountered:

	swap = 0, insertion = 1, substitution = 2, deletion = 4

A typical output would now look like this:

	$ git sm
	git: 'sm' is not a git-command. See 'git --help'.

	Did you mean one of these?
		am
		rm

The cut-off is at similarity rating 6, which was empirically determined
to give sensible results.

As a convenience, if there is only one candidate, Git continues under
the assumption that the user mistyped it.  Example:

	$ git reabse
	WARNING: You called a Git program named 'reabse', which does
	not exist.
	Continuing under the assumption that you meant 'rebase'
	[...]

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-31 10:14:58 -07:00
Junio C Hamano
7e44c93558 'git foo' program identifies itself without dash in die() messages
This is a mechanical conversion of all '*.c' files with:

	s/((?:die|error|warning)\("git)-(\S+:)/$1 $2/;

The result was manually inspected and no false positive was found.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-31 09:39:19 -07:00
Nguyễn Thái Ngọc Duy
bb528633b3 setup_git_directory(): fix move to worktree toplevel directory
When setup_git_directory() returns successfully, it is supposed to move
current working directory to worktree toplevel directory.

However, the code recomputing prefix inside setup_git_directory() has
to move cwd back to original working directory, in order to get new
prefix.  After that, it should move cwd back to worktree toplevel
directory as expected.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 23:41:12 -07:00
Nguyễn Thái Ngọc Duy
f83eafdd62 update-index: fix worktree setup
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 23:35:51 -07:00
Teemu Likonen
1707adb7f2 config.txt: Add missing colons after option name
gitcvs.usecrlfattr --> gitcvs.usecrlfattr::

This fixes an asciidoc markup issue.

Signed-off-by: Teemu Likonen <tlikonen@iki.fi>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 23:35:12 -07:00
Junio C Hamano
146ea068a0 git commit --author=$name: look $name up in existing commits
This allows "git commit --author=$name" to accept a name that is not in
the required "A U Thor <author@example.xz>" format, and use that to look
up an author name that matches from existing commits.

When using this feature, it is the user's responsibility to give a name
that uniquely matches the name s/he wants, as the logic returns the name
from the first matching commit.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 21:04:50 -07:00
Junio C Hamano
a5a818ee48 diff: vary default prefix depending on what are compared
With a new configuration "diff.mnemonicprefix", "git diff" shows the
differences between various combinations of preimage and postimage trees
with prefixes different from the standard "a/" and "b/".  Hopefully this
will make the distinction stand out for some people.

    "git diff" compares the (i)ndex and the (w)ork tree;
    "git diff HEAD" compares a (c)ommit and the (w)ork tree;
    "git diff --cached" compares a (c)ommit and the (i)ndex;
    "git-diff HEAD:file1 file2" compares an (o)bject and a (w)ork tree entity;
    "git diff --no-index a b" compares two non-git things (1) and (2).

Because these mnemonics now have meanings, they are swapped when reverse
diff is in effect and this feature is enabled.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 20:53:24 -07:00
Junio C Hamano
3928097020 diff: Help "less" hide ^M from the output
When the tracked contents have CRLF line endings, colored diff output
shows "^M" at the end of output lines, which is distracting, even though
the pager we use by default ("less") knows to hide them.

The problem is that "less" hides a carriage-return only at the end of the
line, immediately before a line feed.  The colored diff output does not
take this into account, and emits four element sequence for each line:

   - force this color;
   - the line up to but not including the terminating line feed;
   - reset color
   - line feed.

By including the carriage return at the end of the line in the second
item, we are breaking the smart our pager has in order not to show "^M".
This can be fixed by changing the sequence to:

   - force this color;
   - the line up to but not including the terminating end-of-line;
   - reset color
   - end-of-line.

where end-of-line is either a single linefeed or a CRLF pair.  When the
output is not colored, "force this color" and "reset color" sequences are
both empty, so we won't have this problem with or without this patch.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 20:34:45 -07:00
Junio C Hamano
7df437e56b Merge branch 'maint'
* maint:
  gitattributes: -crlf is not binary
  git-apply: Loosen "match_beginning" logic
  Fix example in git-name-rev documentation
  shell: do not play duplicated definition games to shrink the executable
  Fix use of hardlinks in "make install"
  pack-objects: Allow missing base objects when creating thin packs
2008-08-30 20:31:39 -07:00
Junio C Hamano
bbb896d8e1 gitattributes: -crlf is not binary
The description of crlf attribute incorrectly said that "-crlf" means
binary.  It is true that for binary files you would want "-crlf", but
that is not the same thing.

We also have supported attribute macros and via that mechanism a handy
"binary" to specify "-crlf -diff" at the same time.  It was not documented
anywhere as far as I can tell, even though the support was there from
the very beginning.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 20:30:45 -07:00
Junio C Hamano
8fdcf31254 checkout: do not check out unmerged higher stages randomly
During a conflicted merge when you have unmerged stages for a
path F in the index, if you said:

    $ git checkout F

we rewrote F as many times as we have stages for it, and the
last one (typically "theirs") was left in the work tree, without
resolving the conflict.

This fixes it by noticing that a specified pathspec pattern
matches an unmerged path, and by erroring out.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 16:46:25 -07:00
Junio C Hamano
e1afaea942 Merge branch 'jc/post-simplify' (early part) into tr/filter-branch
* 'jc/post-simplify' (early part):
  revision --simplify-merges: make it a no-op without pathspec
  revision --simplify-merges: do not leave commits unprocessed
  revision --simplify-merges: use decoration instead of commit->util field
2008-08-30 16:03:40 -07:00
Heikki Orsila
34baebcee1 Start conforming code to "git subcmd" style
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>
2008-08-30 13:50:48 -07:00
Junio C Hamano
ed0f47a8c4 git-apply: Loosen "match_beginning" logic
Even after a handfle attempts, match_beginning logic still has corner
cases:

    1bf1a85 (apply: treat EOF as proper context., 2006-05-23)
    65aadb9 (apply: force matching at the beginning., 2006-05-24)
    4be6096 (apply --unidiff-zero: loosen sanity checks ..., 2006-09-17)
    ee5a317 (Fix "git apply" to correctly enforce "match ..., 2008-04-06)

This is a tricky piece of code.

We still incorrectly enforce "match_beginning" for -U0 matches.
I noticed this while trying out an example sequence from Clemens Buchacher:

    $ echo a >victim
    $ git add victim
    $ echo b >>victim
    $ git diff -U0 >patch
    $ cat patch
    diff --git i/victim w/victim
    index 7898192..422c2b7 100644
    --- i/victim
    +++ w/victim
    @@ -1,0 +2 @@ a
    +b
    $ git apply --cached --unidiff-zero <patch
    $ git show :victim
    b
    a

The change inserts a new line before the second line, but we insist it to
be applied at the beginning.  As the result, the code refuses to apply it
at the original offset, and we end up adding the line at the beginning.

Updates to the test script are by Clemens Buchacher.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 13:23:02 -07:00
Junio C Hamano
ee837244df Fix example in git-name-rev documentation
Since 59d3f54 (name-rev: avoid "^0" when unneeded, 2007-02-20), name-rev
stopped showing an unnecessary "^0" to dereference a tag down to a commit.
The patch should have made a matching update to the documentation, but we
forgot.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-30 13:23:01 -07:00
Junio C Hamano
df85f7855d Merge branch 'sp/missing-thin-base' into maint
* sp/missing-thin-base:
  pack-objects: Allow missing base objects when creating thin packs
2008-08-30 08:38:19 -07:00
Junio C Hamano
ff1e8bfcd6 Merge branch 'sb/daemon'
* sb/daemon:
  daemon.c: minor style fixup
  git-daemon: rewrite kindergarden, new option --max-connections
  git-daemon: Simplify dead-children reaping logic
  git-daemon: use LOG_PID, simplify logging code
  git-daemon: call logerror() instead of error()
2008-08-30 08:17:15 -07:00
Junio C Hamano
014aff7c92 Merge branch 'af/maint-install-no-handlink' into maint
* af/maint-install-no-handlink:
  Fix use of hardlinks in "make install"
  Makefile: always provide a fallback when hardlinks fail
2008-08-29 22:39:25 -07:00
Junio C Hamano
6ffaecc7d8 shell: do not play duplicated definition games to shrink the executable
Playing with linker games to shrink git-shell did not go well with various
other platforms and compilers.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 22:38:41 -07:00
Alex Riesen
4e3ae59ef6 Fix use of hardlinks in "make install"
The code failed to filter-out git-add properly on platforms were $X is
not empty (ATM there is only one such a platform).

Than it tried to create a hardlink to the file ($execdir/git-add) it just
removed (because git-add is first in the BUILT_INS), so ln failed (but
because stderr was redirected into /dev/null the error was never seen), and
the whole install ended up using "ln -s" instead.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 22:37:04 -07:00
Thomas Rast
498bcd3159 rev-list: fix --reverse interaction with --parents
--reverse did not interact well with --parents, as the included test
case shows: in a history like

  A--B.
   \   \
    `C--M--D

the command

  git rev-list --reverse --parents --full-history HEAD

erroneously lists D as having no parents at all.  (Without --reverse,
it correctly lists M.)

This is caused by the machinery driving --reverse: it first grabs all
commits through the normal routines, then runs them through the same
routines again, effectively simplifying them twice.

Fix this by moving the --reverse one level up, into get_revision().
This way we can cleanly grab all commits via the normal calls, then
just pop them off the list one by one without interfering with
get_revision_internal().

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 22:20:51 -07:00
Nicolas Pitre
d35825da6d fixup_pack_header_footer(): use nicely aligned buffer sizes
It should be more efficient to use nicely aligned buffer sizes, either
for filesystem operations or SHA1 checksums.  Also, using a relatively
small nominal size might allow for the data to remain in L1 cache
between both SHA1_Update() calls.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 21:51:28 -07:00
Nicolas Pitre
8522148f79 index-pack: use fixup_pack_header_footer()'s validation mode
When completing a thin pack, a new header has to be written to
the pack and a new SHA1 computed.  Make sure that the SHA1 of what
is being read back matches the SHA1 of what was written for both:
the original pack and the appended objects.

To do so, a couple write_or_die() calls were converted to sha1write()
which has the advantage of doing some buffering as well as handling
SHA1 and CRC32 checksum already.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 21:51:28 -07:00
Nicolas Pitre
ac0463ed44 pack-objects: use fixup_pack_header_footer()'s validation mode
When limiting the pack size, a new header has to be written to the
pack and a new SHA1 computed.  Make sure that the SHA1 of what is being
read back matches the SHA1 of what was written.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 21:51:27 -07:00
Nicolas Pitre
abeb40e5aa improve reliability of fixup_pack_header_footer()
Currently, this function has the potential to read corrupted pack data
from disk and give it a valid SHA1 checksum.  Let's add the ability to
validate SHA1 checksum of existing data along the way, including before
and after any arbitrary point in the pack.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 21:51:27 -07:00
Nicolas Pitre
6ed7f25e95 pack-objects: improve returned information from write_one()
This function returns 0 when the current object couldn't be written
due to the pack size limit, otherwise the current offset in the pack.
There is a problem with this approach however, since current object
could be a delta and its delta base might just have been written in
the same write_one() call, but those successfully written objects are
not accounted in the offset variable tracked by the caller. Currently
this is not an issue but a subsequent patch will need this.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 21:51:27 -07:00
Junio C Hamano
d2b9dff8a0 Merge branch 'np/verify-pack' into maint
* np/verify-pack:
  discard revindex data when pack list changes
2008-08-29 21:48:02 -07:00
Romain Francoise
5059a42780 builtin-help: fallback to GIT_MAN_VIEWER before man
In some situations it is useful to be able to switch viewers via the
environment, e.g. in Emacs shell buffers.  So check the GIT_MAN_VIEWER
environment variable and try it before falling back to "man".

Signed-off-by: Romain Francoise <romain@orebokech.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 21:46:33 -07:00
Junio C Hamano
445cac18c0 Merge branch 'maint'
* maint:
  tutorial: gentler illustration of Alice/Bob workflow using gitk
  pretty=format: respect date format options
  make git-shell paranoid about closed stdin/stdout/stderr
  Document gitk --argscmd flag.
  Fix '--dirstat' with cross-directory renaming
  for-each-ref: Allow a trailing slash in the patterns
2008-08-29 00:16:39 -07:00
Tor Arvid Lund
e990501312 git-p4: Fix checkout bug when using --import-local.
When this option is passed to git p4 clone, the checkout at the end would
previously fail. This patch fixes it by optionally creating the master branch
from refs/heads/p4/master, which is the correct one for this option.

Signed-off-by: Tor Arvid Lund <torarvid@gmail.com>
Acked-By: Simon Hausmann <simon@lst.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 00:15:47 -07:00
Paolo Ciarrocchi
53d1589ff6 tutorial: gentler illustration of Alice/Bob workflow using gitk
Update to gitutorial as discussedin the git mailing list:

http://marc.info/?t=121969390900002&r=1&w=2

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 00:14:30 -07:00
Jeff King
d36f8679e9 pretty=format: respect date format options
When running a command like:

  git log --pretty=format:%ad --date=short

the date option was ignored. This patch causes it to use whatever
format was specified by --date (or by --relative-date, etc), just
as the non-user formats would do.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 00:14:29 -07:00
Paolo Bonzini
0cfeed2e1d make git-shell paranoid about closed stdin/stdout/stderr
It is in general unsafe to start a program with one or more of file
descriptors 0/1/2 closed.  Karl Chen for example noticed that stat_command
does this in order to rename a pipe file descriptor to 0:

    dup2(from, 0);
    close(from);

... but if stdin was closed (for example) from == 0, so that

    dup2(0, 0);
    close(0);

just ends up closing the pipe.  Another extremely rare but nasty problem
would occur if an "important" file ends up in file descriptor 2, and is
corrupted by a call to die().

Fixing this in git was considered to be overkill, so this patch works
around it only for git-shell.  The fix is simply to open all the "low"
descriptors to /dev/null in main.

Signed-off-by: Paolo Bonzini <bonzini@gnu.org>
Acked-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 00:14:29 -07:00
Yann Dirson
29f28151c5 Document gitk --argscmd flag.
This was part of my original patch, but appears to have been lost.

Signed-off-by: Yann Dirson <ydirson@altern.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 00:14:29 -07:00
Linus Torvalds
441bca0bbc Fix '--dirstat' with cross-directory renaming
The dirstat code depends on the fact that we always generate diffs with
the names sorted, since it then just does a single-pass walk-over of the
sorted list of names and how many changes there were. The sorting means
that all files are nicely grouped by directory.

That all works fine.

Except when we have rename detection, and suddenly the nicely sorted list
of pathnames isn't all that sorted at all. And now the single-pass dirstat
walk gets all confused, and you can get results like this:

  [torvalds@nehalem linux]$ git diff --dirstat=2 -M v2.6.27-rc4..v2.6.27-rc5
     3.0% arch/powerpc/configs/
     6.8% arch/arm/configs/
     2.7% arch/powerpc/configs/
     4.2% arch/arm/configs/
     5.6% arch/powerpc/configs/
     8.4% arch/arm/configs/
     5.5% arch/powerpc/configs/
    23.3% arch/arm/configs/
     8.6% arch/powerpc/configs/
     4.0% arch/
     4.4% drivers/usb/musb/
     4.0% drivers/watchdog/
     7.6% drivers/
     3.5% fs/

The trivial fix is to add a sorting pass, fixing it to:

  [torvalds@nehalem linux]$ git diff --dirstat=2 -M v2.6.27-rc4..v2.6.27-rc5
    43.0% arch/arm/configs/
    25.5% arch/powerpc/configs/
     5.3% arch/
     4.4% drivers/usb/musb/
     4.0% drivers/watchdog/
     7.6% drivers/
     3.5% fs/

Spot the difference. In case anybody wonders: it's because of a ton of
renames from {include/asm-blackfin => arch/blackfin/include/asm} that just
totally messed up the file ordering in between arch/arm and arch/powerpc.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 00:14:29 -07:00
Björn Steinbrink
114ef90854 for-each-ref: Allow a trailing slash in the patterns
More often than not, I end up using something like refs/remotes/ as the
pattern for for-each-ref, but that doesn't work, because it expects to see
the slash in the ref name right after the matched pattern. So teach it to
accept the slash as the final character in the pattern as well.

Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-29 00:14:06 -07:00
Nguyễn Thái Ngọc Duy
b6469a81d2 read-tree: setup worktree if merge is required
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 22:47:17 -07:00
Nguyễn Thái Ngọc Duy
6577f542b3 grep: fix worktree setup
Unless used with --cached or grepping on a tree, "git grep" will
search on working directory, so set up worktree properly

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 22:46:16 -07:00
Alex Riesen
61c5d431de list_commands: only call git_exec_path if it is needed
Even if it always needed

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 21:51:34 -07:00
Alex Riesen
1f08e5ce24 Allow git help work without PATH set
Just because we can

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 21:51:28 -07:00
Alex Riesen
c7371e992b Make main_cmds and other_cmds local to builtin-help.c
These are not used anywhere else.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 21:51:04 -07:00
Alex Riesen
b9f62c0e7d Remove useless memset of static command name lists in builtin-merge.c
The statics are always initialized with 0

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 21:50:32 -07:00
Alex Riesen
e321180ed3 Remove calculation of the longest command name from where it is not used
Just calculate it where it is needed - it is cheap and trivial,
as all the lengths are already there (stored when creating the
command lists).

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 21:49:55 -07:00
Brandon Casey
63e8aea74e dir.c: Avoid c99 array initialization
The following syntax:

        char foo[] = {
                [0] = 1,
                [7] = 2,
                [15] = 3
        };

is a c99 construct which some compilers do not support even though they
support other c99 constructs. This construct can be avoided by folding
these 'special' test cases into the sane_ctype array and making use of
the related infrastructure.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 21:49:51 -07:00
Nguyễn Thái Ngọc Duy
4f38f6b5ba diff*: fix worktree setup
This fixes "git diff", "git diff-files" and "git diff-index" to work
correctly under worktree setup. Because diff* family works in many modes
and not all of them require worktree, Junio made a nice summary
(with a little modification from me):

 * diff-files is about comparing with work tree, so it obviously needs a
  work tree;

 * diff-index also does, except "diff-index --cached" or "diff --cached TREE"

 * no-index is about random files outside git context, so it obviously
   doesn't need any work tree;

 * comparing two (or more) trees doesn't;

 * comparing two blobs doesn't;

 * comparing a blob with a random file doesn't;

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 20:50:10 -07:00
Matthias Kestenholz
1b0f7978dd bash-completion: Add all submodule subcommands to the completion list
Signed-off-by: Matthias Kestenholz <mk@spinlock.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-28 20:39:43 -07:00
Christian Couder
c9c4e2d5a2 bisect: only check merge bases when needed
When one good revision is not an ancestor of the bad revision, the
merge bases between the good and the bad revision should be checked
to make sure that they are also good revisions.

A previous patch takes care of that, but it may check the merge bases
more often than really needed. In fact the previous patch did not try
to optimize this as much as possible because it is not so simple. So
this is the purpose of this patch.

One may think that when all the merge bases have been checked then
we can save a flag, so that we don't need to check the merge bases
again during the bisect process.

The problem is that the user may choose to checkout and test
something completely different from what the bisect process
suggested. In this case we have to check the merge bases again,
because there may be new merge bases relevant to the bisect
process.

That's why, in this patch, when we detect that the user tested
something else than what the bisect process suggested, we remove
the flag that says that we don't need to check the merge bases
again.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-27 18:08:06 -07:00
Christian Couder
f821d08921 bisect: test merge base if good rev is not an ancestor of bad rev
Before this patch, "git bisect", when it was given some good revs that
are not ancestor of the bad rev, didn't check if the merge bases were
good. "git bisect" just supposed that the user knew what he was doing,
and that, when he said the revs were good, he knew that it meant that
all the revs in the history leading to the good revs were also
considered good.

But in pratice, the user may not know that a good rev is not an
ancestor of the bad rev, or he may not know/remember that all revs
leading to the good rev will be considered good. So he may give a good
rev that is a sibling, instead of an ancestor, of the bad rev, when in
fact there can be one rev becoming good in the branch of the good rev
(because the bug was already fixed there, for example) instead of one
rev becoming bad in the branch of the bad rev.

For example, if there is the following history:

    A--B--C--D
	\
	 E--F

and we launch "git bisect start D F" then only C and D would have been
considered as possible first bad commit before this patch. This could
invite user errors; F could be the commit that fixes the bug that exists
everywhere else.

The purpose of this patch is to detect when "git bisect" is passed
some good revs that are not ancestors of the bad rev, and then to first
ask the user to test the merge bases between the good and bad revs.

If the merge bases are good then all is fine, we can continue
bisecting. Otherwise, if one merge base is bad, it means that the
assumption that all revs leading to the good one are good too is
wrong and we error out. In the case where one merge base is skipped we
issue a warning and then continue bisecting anyway.

These checks will also catch the case where good and bad have been
mistaken. This means that we can remove the check that was done latter
on the output of "git rev-list --bisect-vars".

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-08-27 18:08:04 -07:00