Bug#993339: Package: reprotest Debian Salsa reprotest fails due to different compile times

[Christopher Talbot]

Hello!

Thank you for responding so fast.

On Mon, 2021-08-30 at 18:00 -0700, Vagrant Cascadian wrote:
> On 2021-08-30, Christopher Talbot wrote:
> > Debian Salsa seems to fail reprotest due to different compile
> > times.
> ...
> > One recent example is here:
> > https://salsa.debian.org/DebianOnMobile-team/vvmd/-/pipelines/283265
> > 
> > When looking at the debs with diffoscope, I get example output like
> > below (it happens with several files, I only included one for
> > brevity):
> > 
> > -drwxr-xr-x   0 root         (0) root         (0)        0 2021-08-
> > 30
> > 22:22:16.000000 ./
> > │ │ │ -drwxr-xr-x   0 root         (0) root         (0)        0
> > 2021-
> > 08-30 22:22:15.000000 ./usr/
> > │ │ │ -drwxr-xr-x   0 root         (0) root         (0)        0
> > 2021-
> > 08-30 22:22:16.000000 ./usr/bin/
> > │ │ │ --rwxr-xr-x   0 root         (0) root         (0)   119928
> > 2021-
> > 08-30 22:22:16.000000 ./usr/bin/vvmd
> ...
> > 08-30 22:22:24.000000 ./usr/
> > │ │ │ +drwxr-xr-x   0 root         (0) root         (0)        0
> > 2021-
> > 08-30 22:22:25.000000 ./usr/bin/
> > │ │ │ +-rwxr-xr-x   0 root         (0) root         (0)   119928
> > 2021-
> > 08-30 22:22:25.000000 ./usr/bin/vvmd
> 
> > In osk-sdl, it seemed to be fixed by running it a day later.
> > https://salsa.debian.org/DebianOnMobile-team/osk-sdl/-/jobs/1821885
> 
> Hrm. That sounds suspicious...
> 
> I'm unable to reproduce this locally with reprotest against a vvmd or
> osk-sdl git checkout. Maybe this has something to do with how salsaci
> is
> setting up the directory... ? Maybe it unpacks the .orig.tar.* in
> some
> way that alters the timestamps?
> 
> But that *should* be fixed by dpkg's SOURCE_DATE_EPOCH handling when
> it
> generates the .deb ... hrm.
> 
> Maybe when the job was first run, SOURCE_DATE_EPOCH was set to a date
> later than the file unpack times (e.g. maybe due to timezone?)... and
> thus wouldn't clamp the timestamps ... that might explain re-running
> the
> job later suceeding.
> 
> 
> live well,
>   vagrant

Unfortunately, I do not know enough about reprotest to know what causes
it.

On a hunch, I also decided to rerun reprotest, and it worked this time:

https://salsa.debian.org/DebianOnMobile-team/vvmd/-/pipelines/283265

So it seems to be some sort of time/date dependent bug?

Respectfully,
Chris Talbot