Re: Updating a submodule with a compatible version from another submodule version using the parent meta-repository

[Jens Lehmann <Jens.Lehmann@web.de>]

Am 26.01.2011 20:10, schrieb Julian Ibarz:
> On Wed, Jan 26, 2011 at 2:06 PM, Jens Lehmann <Jens.Lehmann@web.de> wrote:
>> Am 26.01.2011 19:32, schrieb Julian Ibarz:
>>> I am using git submodule in one of my professional projects and I am
>>> facing an issue when I am using git bisect in one of the submodules.
>>>
>>> Basically I have a meta repository which I will call A and two
>>> submodules B and C. Sometimes I use git bisect in B but it is
>>> dependent on C so when I go back too much in the history of B, C needs
>>> to change its version to a compatible one. Doing this manually is
>>> really time consuming for me and I guess a lot of people have this
>>> issue so I was a little bit surprise to not find easily anything on
>>> the net that permits to do this automatically.
>>
>> What about bisecting in A (doing "git submodule update" after every
>> step) to bisect to a smaller range of commits in B (which are then
>> not dependent on your submodule C anymore and can be bisected inside
>> B)? This of course assumes A properly records the dependencies
>> between B and C.
> 
> Yes but actually my real use case that made me write this mail was
> more I have a feature done in an old branch and to try it I never to
> revert back to this version. In this case, I have to find out the
> corresponding good version in A and C. In this case I cannot start
> like what you propose in A to find out the good version in B and C, I
> already know the version I want in B.

Hmm, looks like I lost you here ... you want to bisect in B although
you know what commit you want there? Care to explain a bit more?

>>> Is there anything existing to do that and I just didn't find it yet?
>>> If not I think I might have an implementation idea I would like to try
>>> out.
>>
>> The call to "git submodule update" after each bisect step in the
>> superproject will be obsolete as soon as the recursive checkout
>> I am currently working on is done, but that is not here yet.
> 
> Can you be more detailed about your recursive checkout feature? Is it
> what I proposed?

I don't think so, that will just get rid of the extra call to "git
submodule update" when bisecting in A.