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RE: [PATCH 2/3] merge-recursive: remove return value from get_files_dirs




> 
> On Mon, Aug 28, 2017 at 02:28:28PM -0600, Kevin Willford wrote:
> 
> > The return value of the get_files_dirs call is never being used.
> > Looking at the history of the file and it was originally only
> > being used for debug output statements.  Also when
> > read_tree_recursive return value is non zero it is changed to
> > zero.  This leads me to believe that it doesn't matter if
> > read_tree_recursive gets an error.
> 
> Or that the function is buggy. :)

That was one of my questions as well.  Should read_tree_recursive
be propagating a -1 and merge_trees be checking for that and bail
when the call to get_files_dirs return is < 0?  I made a commit with
this change and ran the tests and they all still passed so either this
return really doesn't matter or there are not sufficient tests covering
it.

I went with this change because it was not changing any of the
current functionality and if we find a case where it matters that
read_tree_recursive fails due to bad tree or something else we
can address it then.

> 
> I'm tempted to say that we should probably die() when
> read_tree_recursive fails. This should only happen if we fail to parse
> the tree, or if our callback (save_files_dirs here) returns failure, and
> the latter looks like it never happens.
> 
> > Since the debug output has been removed and the caller isn't
> > checking the return value there is no reason to keep calulating
> > and returning a value.
> 
> Agreed, and I'm happy to see dead code go.
> 
> Minor nit: s/calulating/calculating/ in your commit message.

When will that spell checker for git messages be ready? ;)

> 
> -Peff