[Reproducible-builds] Bug#790844: probably caused by timezone changes

[Mattia Rizzolo]

On Sat, Jul 04, 2015 at 05:21:01PM +0200, Alexandre Detiste wrote:
> > thanks for caring about reproducible builds and filing bugs against your own 
> > packages! :-)
> 
> I got conviced (and a bit entertained) by the talk at FOSDEM ;-)

;D

> I think that Mattia's guess was closer:

eheh, that was really a guess!
/me goes making some bets....

> >> Quite some FTBFS on our infrastructure are do to us using
> >> DEB_BUILD_OPTIONS=parallel=23 (e.g. very high) and some packages not coping
> >> fine with it.
> 
> I finally found ou the likely cause:
> 'install' target in Makefile.in is split in tiny chunks.

I didn't look at any way at the package other than the build log.

> I don't know if it still make any sense, this was already done that way
> before the SVN -> Git transition from 2005, and I'm maintaining this
> for less than a year.
> 
> "install : install1 install11 install2 installdirs cruft"
> 
> If 'install11' run before 'intall1'; it fails.
> Adding a simple sleep 0.1at the top of "intall1" always trigger
> an error in "install11".
> 
> Adding an extra "mkdir -p $(DESTDIR)/usr/lib/cruft/" fix this permanently (?)
> 
> https://github.com/a-detiste/cruft/commit/4e8a48999bd1c77c0d902c803f4151f3c09f471a

well, maybe if they are too tiny even mergning them can make sense

> 
> > To achieve reproducibility you will also need to normalize the timezone during 
> > build (eg set TZ=UTC) or wait til debhelper does this for you.
> 
> All the previous run that didn't FTBFS were reproducible;
> are there any other changes needed ?

umh, indeed.
Holger?

-- 
regards,
                        Mattia Rizzolo

GPG Key: 66AE 2B4A FCCF 3F52 DA18  4D18 4B04 3FCD B944 4540         .''`.
more about me:  http://mapreri.org                                 : :'  :
Launchpad user: https://launchpad.net/~mapreri                     `. `'`
Debian QA page: https://qa.debian.org/developer.php?login=mattia     `-
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