Re: [PATCH] stash: reuse cached index entries in --patch temporary index

> "Adam Johnson via GitGitGadget" <gitgitgadget@gmail.com> writes:
> 
> >  2 files changed, 83 insertions(+), 6 deletions(-)
> >
> > diff --git a/builtin/stash.c b/builtin/stash.c
> > index 32dbc97b47..48189cb9f7 100644
> > --- a/builtin/stash.c
> > +++ b/builtin/stash.c
> > @@ -372,6 +372,57 @@ static int reset_tree(struct object_id *i_tree, int update, int reset)
> >  return 0;
> >  }
> >  
> > +static int create_index_from_tree(const struct object_id *tree_id,
> > +   const char *index_path)
> > +{
> > + int nr_trees = 1;
> > + int ret = 0;
> > + struct unpack_trees_options opts;
> > + struct tree_desc t[MAX_UNPACK_TREES];
> > + struct tree *tree;
> > + struct index_state dst_istate = INDEX_STATE_INIT(the_repository);
> > + struct lock_file lock_file = LOCK_INIT;
> > +
> > + repo_read_index_preload(the_repository, NULL, 0);
> > + if (refresh_index(the_repository->index, REFRESH_QUIET, NULL, NULL, NULL))
> > + return -1;
> 
> Is this "non-zero return from refresh_index() leads to a failure"
> intended?  The old "git read-tree HEAD" wouldn't have cared if the
> original index were unmerged, for example, but with this update, we
> will see an immediate failure.  There are other conditions that
> refresh_index() flips its local variable has_errors on, which leads
> to its non-zero return.
> 
> Since "git stash -p" is almost always invoked when the user has
> unstaged modifications, I am not sure allowing refresh_index() to
> notice and barf is what we want here.
>