Re: pg_ls_tmpdir to show directories and shared filesets (and pg_ls_*)

On Wed, Dec 23, 2020 at 01:17:10PM -0600, Justin Pryzby wrote:
> On Mon, Nov 23, 2020 at 04:14:18PM -0500, Tom Lane wrote:
> > * I noticed that you did s/stat/lstat/. That's fine on Unix systems,
> > but it won't have any effect on Windows systems (cf bed90759f),
> > which means that we'll have to document a platform-specific behavioral
> > difference. Do we want to go there?
> >
> > Maybe this patch needs to wait on somebody fixing our lack of real lstat() on Windows.
>
> I think only the "top" patches depend on lstat (for the "type" column and
> recursion, to avoid loops). The initial patches are independently useful, and
> resolve the original issue of hiding tmpdirs. I've rebased and re-arranged the
> patches to reflect this.

I said that, but then failed to attach the re-arranged patches.
Now I also renumbered OIDs following best practice.

The first handful of patches address the original issue, and I think could be
"ready":

$ git log --oneline origin..pg-ls-dir-new |tac
... Document historic behavior of links to directories..
... Add tests on pg_ls_dir before changing it
... Add pg_ls_dir_metadata to list a dir with file metadata..
... pg_ls_tmpdir to show directories and "isdir" argument..
... pg_ls_*dir to show directories and "isdir" column..

These others are optional:
... pg_ls_logdir to ignore error if initial/top dir is missing..
... pg_ls_*dir to return all the metadata from pg_stat_file..

..and these maybe requires more work for lstat on windows:
... pg_stat_file and pg_ls_dir_* to use lstat()..
... pg_ls_*/pg_stat_file to show file *type*..
... Preserve pg_stat_file() isdir..
... Add recursion option in pg_ls_dir_files..

--
Justin