This allows you to say:
git bisect start
git bisect bad $bad
git bisect next
to start bisection without knowing a good commit. This would
have you try a commit that is half-way since the beginning of
the history, which is rather wasteful if you already know a good
commit, but if you don't (or your history is short enough that
you do not care), there is no reason not to allow this.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This slightly modernizes the bisect script to use show-ref/for-each-ref
instead of looking into $GIT_DIR/refs files directly.
Signed-off-by: Junio C Hamano <junkio@cox.net>
One bad commit is fundamentally needed for bisect to run,
and if we beforehand know more good commits, we can narrow
the bisect space down without doing the whole tree checkout
every time we give good commits.
This patch implements:
git bisect start [<bad> [<good>...]] [--] [<pathspec>...]
as a short-hand for this command sequence:
git bisect start
git bisect bad $bad
git bisect good $good1 $good2...
On the other hand, there may be some confusion between revs
(<bad> and <good>...) and <pathspec>... if -- is not used
and if an invalid rev or a pathspec that looks like a rev is
given.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
So we can remove the specific message in "bisect_run".
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
We may be able to "run" with only one good revision given
and then verify that the result of the first run is bad.
And perhaps also the other way around.
But for now let's check that we have at least one bad and
one good revision before we start to run.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
The branch you are on while bisecting is always "bisect", and
checking for "refs/heads/bisect*" is wrong. Only check if it is
exactly "refs/heads/bisect".
Signed-off-by: Junio C Hamano <junkio@cox.net>
This idea was suggested by Bill Lear
(Message-ID: <17920.38942.364466.642979@lisa.zopyra.com>)
and I think it is a very good one.
This patch adds a new test file for "git bisect run", but there
is currently only one basic test.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Without this the rev could be (e.g.) a tag and then the condition to end the
bisect might fail and you have to check the already known to be bad revision
once more.
Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Converts one use of git-checkout in git-bisect not to say "switching
to branch". It looks like all the other cases it is friendlier to
give notice to the end user.
Signed-off-by: Junio C Hamano <junkio@cox.net>
I had local modifications in the tree and doing bisect reset required me to
manually edit .git/HEAD.
Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Some GIT's shell script are using bare 'perl' for perl invocation.
Use @@PERL@@ symbol and replace it with PERL_PATH_SQ everywhere.
Signed-off-by: Michal Rokos <michal.rokos@nextsoft.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
I noticed that we forgot to clean this file and kept it that
way, while trying to help with Andrew's bisect problem.
Signed-off-by: Junio C Hamano <junkio@cox.net>
git-bisect reset without an argument would return to master even
if the bisecting started at a non-master branch. This patch makes
it save the original branch name to .git/head-name and restore it
afterwards.
This is also compatible with Cogito and cg-seek, so cg-status will
show that we are seeked on the bisect branch and cg-reset will
properly restore the original branch.
git-bisect start will refuse to work if it is not on a bisect but
.git/head-name exists; this is to protect against conflicts with
other seeking tools.
Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
There were some problems with the usage message clean-up patch
series. I hadn't realised that subdirectory aware scripts can't source
git-sh-setup. I propose that we change this and let the scripts which
are subdirectory aware set a variable, SUBDIRECTORY_OK, before they
source git-sh-setup.
The scripts will also set USAGE and possibly LONG_USAGE before they
source git-sh-setup. If LONG_USAGE isn't set it defaults to USAGE.
If we go this way it's easy to catch --help in git-sh-setup, print the
(long) usage message to stdout and exit cleanly. git-sh-setup can
define a 'usage' shell function which can be called by the scripts to
print the short usage string to stderr and exit non-cleanly. It will
also be easy to change $0 to basename $0 or something else, if would
like to do that sometime in the future.
What follows is a patch to convert a couple of the commands to this
style. If it's ok with everyone to do it this way I will convert the
rest of the scripts too.
[jc: thrown in to proposed updates queue for comments.]
Signed-off-by: Junio C Hamano <junkio@cox.net>
On AIX, there is no -n option to the system's echo. Instead,
it needs the '\c' control character. We could replace
echo -n "foo"
with
echo -e "foo\c"
but printf is recommended by most man pages. Tested on AIX
5.3, Solaris 8, and Debian.
[jc: futureproofed two instances that uses variable with '%s'
so later feeding different messages would not break things too
easily; others are emitting literal so whoever changes the
literal ought to notice more easily so they are safe.]
Signed-off-by: E. Jason Riedy <ejr@cs.berkeley.edu>
Signed-off-by: Junio C Hamano <junkio@cox.net>
It was surprisingly easy to do.
git bisect start <pathspec>
followed by all the normal "git bisect good/bad" stuff.
Almost totally untested, and I guarantee that if your pathnames have
spaces in them (or your GIT_DIR has spaces in it) this won't work. I don't
know how to fix that, my shell programming isn't good enough.
This involves small changes to make "git-rev-list --bisect" work in the
presense of a pathspec limiter, and then truly trivial (and that's the
broken part) changes to make "git bisect" save away and use the pathspec.
I tried one bisection, and a "git bisect visualize", and it all looked
correct. But hey, don't be surprised if it has problems.
Linus
Signed-off-by: Junio C Hamano <junkio@cox.net>
Now all the users of this script detect its exit status and die,
complaining that it is outside git repository. So move the code
that dies from all callers to git-sh-setup script.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This adds the counterpart of git-update-ref that lets you read
and create "symbolic refs". By default it uses a symbolic link
to represent ".git/HEAD -> refs/heads/master", but it can be compiled
to use the textfile symbolic ref.
The places that did 'readlink .git/HEAD' and 'ln -s refs/heads/blah
.git/HEAD' have been converted to use new git-symbolic-ref command, so
that they can deal with either implementation.
Signed-off-by: Junio C Hamano <junio@twinsun.com>
As a convenience measure, 'bisect bad' or 'bisect good' automatically
does 'bisect next' when it knows it can, but the result of that test
to see if it can was leaking through as the exit code from the whole
thing, which was bad. Noticed by Anton Blanchard.
Signed-off-by: Junio C Hamano <junkio@cox.net>
The 'git bisect' command was very unforgiving in that once you made a
mistake telling it good/bad it was very hard to take it back. Keep a
log of what you told it in an earlier session, so that it can be
replayed after removing everything after what you botched last time.
Signed-off-by: Junio C Hamano <junkio@cox.net>
As promised, this is the "big tool rename" patch. The primary differences
since 0.99.6 are:
(1) git-*-script are no more. The commands installed do not
have any such suffix so users do not have to remember if
something is implemented as a shell script or not.
(2) Many command names with 'cache' in them are renamed with
'index' if that is what they mean.
There are backward compatibility symblic links so that you and
Porcelains can keep using the old names, but the backward
compatibility support is expected to be removed in the near
future.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Linus says:
I'm testing bisection to find a bug that causes my G5 to no longer boot,
and during the process have found this command line very nice:
gitk bisect/bad --not $(cd .git/refs ; ls bisect/good-*)
it basically shows the state of bisection with the known bad commit as the
top, and cutting off all the good commits - so what you see are the
potential buggy commits.
Signed-off-by: Junio C Hamano <junkio@cox.net>
When testing bisection and using gitk to visualize the result, it was
obvious that the termination condition was broken.
We know what the bad entry is only when the bisection ends up telling us
to test the known-bad entry again.
Also, add a safety net: if somebody marks as good something that includes
the known-bad point, we now notice and complain, instead of writing an
empty revision to the new bisection branch.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
When I munged the original from Linus, which did not terminate
when the last bisect to check happened to be a bad one, to
terminate, I seem to have botched the end result to pick.
Thanks for Sanjoy Mahajan for a good reproduction recipe to
diagnose this.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This adds a new "git bisect" command.
- "git bisect start"
start bisection search.
- "git bisect bad <rev>"
mark some version known-bad (if no arguments, then current HEAD)
- "git bisect good <revs>..."
mark some versions known-good (if no arguments, then current HEAD)
- "git bisect reset <branch>"
done with bisection search and go back to your work (if
no arguments, then "master").
The way you use it is:
git bisect start
git bisect bad # Current version is bad
git bisect good v2.6.13-rc2 # v2.6.13-rc2 was the last version
# tested that was good
When you give at least one bad and one good versions, it will
bisect the revision tree and say something like:
Bisecting: 675 revisions left to test after this
and check out the state in the middle. Now, compile that kernel, and boot
it. Now, let's say that this booted kernel works fine, then just do
git bisect good # this one is good
which will now say
Bisecting: 337 revisions left to test after this
and you continue along, compiling that one, testing it, and depending on
whether it is good or bad, you say "git bisect good" or "git bisect bad",
and ask for the next bisection.
Until you have no more left, and you'll have been left with the first bad
kernel rev in "refs/bisect/bad".
Oh, and then after you want to reset to the original head, do a
git bisect reset
to get back to the master branch, instead of being in one of the bisection
branches ("git bisect start" will do that for you too, actually: it will
reset the bisection state, and before it does that it checks that you're
not using some old bisection branch).
Not really any harder than doing series of "quilt push" and "quilt pop",
now is it?
[jc: This patch is a rework based on what Linus posted to the
list. The changes are:
- The original introduced four separate commands, which was
three too many, so I merged them into one with subcommands.
- Since the next thing you would want to do after telling it
"bad" and "good" is always to bisect, this version does it
automatically for you.
- I think the termination condition was wrong. The original
version checked if the set of revisions reachable from next
bisection but not rechable from any of the known good ones
is empty, but if the current bisection was a bad one, this
would not terminate, so I changed it to terminate it when
the set becomes a singleton or empty.
- Removed the use of shell array variable.
]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Christian Couder