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

[Vagrant Cascadian]

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
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