Re: help: bisect single file from repos

Hi,

On lundi 07 décembre 2009, walter harms wrote:

Michael J Gruber schrieb:

quoted

walter harms venit, vidit, dixit 07.12.2009 13:59:

quoted

Hi list,
i am new to git (using: git version 1.6.0.2).

though your git is not that new ;)

quoted

I would like to bisect a single file but i have only commit id, no
tags.

Background:
I have a copy of the busybox git repos, and i know there is (perhaps)
a bug in ash.c.

how can i do that ?

You don't need any tags for bisecting. The man page of git-bisect has
several examples on how to use it. Do you have a test script which
exposes the bug?

unfortunately no, the error shows up very nicely when booting my
embdedded system but not else (this is the reason i would to bisect that
file only and not busybox completely). And from the man pages i got the
impression that it is only possible the start with a tag.

The man page says:

git bisect start [<bad> [<good>...]] [--] [<paths>...]

and then:

"This command uses git rev-list --bisect to help drive the binary search 
process to find which change introduced a bug, given an old "good" commit 
object name and a later "bad" commit object name."

i already had the hint that i need to do:
git bisect start bad_commit_id good_commit_id -- ash.c

So did you try that?

Ntl, there is one more question, how can i make sure that
i use the right version ?

If you mean the right git version, then I think any 1.6.X should be enough.

first i toughed  that cherry-pick is the right 
idea but it seems that that will apply onyl certain patches ?

If you want to find the commit that introduced a bug, then you should not 
need cherry-pick.

Regards,
Christian.