Re: [RFC] [PATCH 0/5] Implement 'prior' commit object links

>>> 3. sub-projects
>>>
>>>    In this case, the commit on the "main" commit line would have a
>>>    "prior" link to the commit on the sub-project.  The sub-project
>>>    would effectively be its own head with copied commits objects on
>>>    the main head.
>>>
>>
>>You say you can have only one "prior" per commit, which makes
>>this unsuitable to bind multiple subprojects into a larger
>>project (the earlier "bind" proposal allows zero or more).
> 
> It would still support that. Each commit to the sub-project involves a
> change to the tree of the "main" commit line (a copy of the commit into
> a sub-directory of it). The advantage is that the "tree" in the main
> commit is the combined tree, you don't need to treat the case specially
> to just get the contents out.