Re: [PATCH 0/3] cat-file: add %(objectmode) avoid verifying submodules' OIDs

> > Or if you wanted to mix-and-match with other cat-file placeholders, you
> > can do:
> >
> >   git ls-tree --format='%(objectname) %(objectmode)' HEAD |
> >   git cat-file --batch-check='%(objectname) %(deltabase) %(rest)'
> >
> > That is a little less efficient (we look up the object twice), but once
> > you are working with hex object ids it is not too bad (cat-file is
> > heavily optimized here). Of course in the long run I think we should
> > move to a future where the formatting code is shared, and you can just
> > ask ls-tree for deltabase if you want to.
> 
> I was imagining more about a use case "cat-file --batch" was
> originally designed for---having a long-running single process
> and ask any and all questions you have about various objects in the
> object database by interacting with it.  So "yes, ls-tree can
> already give us that information", while it is true, shoots at a
> different direction from what I had in mind.