Re: [PATCH v1] pg_ls_tmpdir to show directories

> Re-added -hackers.

Indeed, I left it out by accident. I tried to bounce the original mail but 
it did not work.

> Thanks for reviewing.
>
> On Fri, Dec 27, 2019 at 05:22:47PM +0100, Fabien COELHO wrote:
>> The implementation simply extends an existing functions with a boolean to
>> allow for sub-directories. However, the function does not seem to show
>> subdir contents recursively. Should it be the case?
>
>> STM that "//"-comments are not project policy.
>
> Sure, but the patch is less important than the design, which needs to be
> addressed first.  The goal is to somehow show tmpfiles (or at least dirs) used
> by parallel workers.  I mentioned a few possible ways, of which this was the
> simplest to implement.  Showing files beneath the dir is probably good, but
> need to decide how to present it.  Should there be a column for the dir (null
> if not a shared filesets)?  Or some other presentation, like a boolean column
> "is_shared_fileset".

Why not simply showing the files underneath their directories?

   /path/to/tmp/file1
   /path/to/tmp/subdir1/file2

In which case probably showing the directory itself is not useful,
and the is_dir column could be dropped?

>> I'm unconvinced by the skipping condition:
>>
>>   +  if (!S_ISREG(attrib.st_mode) &&
>>   +      (!dir_ok && S_ISDIR(attrib.st_mode)))
>>             continue;
>>
>> which is pretty hard to read. ISTM you meant "not A and not (B and C)"
>> instead?
>
> I can write it as two ifs.

Hmmm. Not sure it would help that much. At least the condition must be 
right. Also, the comment should be updated.

>  And, it's probably better to say:
>  if (!ISDIR() || !dir_ok)

I cannot say I like it. dir_ok is cheaper to test so could come first.

> ..which is same as: !(B && C), as you said.

Ok, so you confirm that the condition was wrong.

>> Catalog update should be a date + number? Maybe this is best left to 
>> the committer?
>
> Yes, but I preferred to include it, causing a deliberate conflict, to ensure
> it's not forgotten.

Ok.

-- 
Fabien.