Re: tests fail on windows with default git settings

Hi,

On 2024-07-08 16:56:10 -0400, Andrew Dunstan wrote:
> On 2024-07-08 Mo 4:16 PM, Andres Freund wrote:
> > I'm actually mildly surprised that the tests don't fail when *not* using
> > autocrlf, because afaict test_json_parser_incremental.c doesn't set stdout to
> > binary and thus we presumably end up with \r\n in the output? Except that that
> > can't be true, because the test does pass on repos without autocrlf...
> >
> >
> > That approach does seem to mildly conflict with Tom and your preference for
> > fixing this by disallowing core.autocrlf? If we do so, the test never ought to
> > see a crlf?
> >
>
> IDK. I normally use core.autocrlf=false core.eol=lf on Windows. The editors
> I use are reasonably well behaved ;-)

:)

> What I suggest (see attached) is we run the diff command with
> --strip-trailing-cr on Windows. Then we just won't care if the expected file
> and/or the output file has CRs.

I was wondering about that too, but I wasn't sure we can rely on that flag
being supported...

> Not sure what the issue is with pg_bsd_indent, though.

I think it's purely that we *read* with fopen("r") and write with
fopen("wb"). Which means that any \r\n in the input will be converted to \n in
the output. That's not a problem if the repo has been cloned without autocrlf,
as there are no crlf in the expected files, but if autocrlf has been used, the
expected files don't match.

It doesn't look like it'd be trivial to make indent remember what was used in
the input. So I think for now the best path is to just use .gitattributes to
exclude the expected files from crlf conversion. If we don't want to do so
repo wide, we can do so just for these files.

Greetings,

Andres Freund