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

[Julian Ibarz <julian.ibarz@gmail.com>]

> Am 26.01.2011 20:48, schrieb Julian Ibarz:
>> Basically my feature would work like this:
>>
>> in B:
>> git submodule checkout some_version
>>
>> This will checkout B but also change A and C so that it is compatible
>> with some_version of B. Basically it will find the commit in A that
>> has the closest parent commit of some_version in B. When this is done
>> it just does git submodule udate on other submodules.
>
> Thanks, now I understand what you are trying to achieve.
>
>> I see in gitk that there is a feature that has a common implementation
>> for what I want to do:
>>
>> For every commits you can see Follows and Precedes which lists the
>> closest label before this release and after. What I need is the same
>> thing: instead of finding a closest labeled commit, I need to find a
>> closest commit referenced by A that precedes current HEAD of B. When
>> this is done I know which commit A has to be and then just have to
>> call git submodule update in A (update every other submodules except
>> for B).
>
> I am not aware of something like that in current Git, But I see that
> such functionality would be helpful. Care to share your implementation
> idea?

Well actually the paragraph just above is what is my implementation
idea. I recognize it is really high level but it is still a start ;).
Basically the "complex" part is to find the precedent commit in B that
is referenced by A. Since gitk has this already but for labels, we
just need to reuse/copy their function that does this but instead as
input having a list of commit labels and find the closest precedent it
is instead the list of commits referenced by A. By the way, anyone
reading this knows where it is in the code of gitk? Or if there is
something like that already in the git code? I never looked into both
code projects.