Re: [PATCH] Teach git-diff{,-files} the new option `--no-index`

> Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:
> 
> >> For one thing, I want to move read_cache() out of run_diff_files() and 
> >> run_diff_index() to their callers, so that the caller can use a 
> >> handcrafted active_cache[] that is somewhat different from what 
> >> read_cache() originally read.
> >
> > I don't understand. Would it not be easier to "return active_nr" in 
> > read_cache_from(path) _also_ when active_cache is set? Or alternatively 
> > check if active_alloc is set?
> 
> I do not understand your questions.
> 
> What I am getting at is that in the current code (without your
> patch), run_diff_files() is about diff between $GIT_DIR/index
> and working tree.  I want to make it diff between active_cache[]
> and working tree.