[Reproducible-builds] Bug#783574: mopidy: [PATCH] Please make the build reproducible.

[Juan Picca]

Thanks for your comments and advice Jérémy!
I hope that with your help i can do better!
Greetings,
JMPC

On Tue, Apr 28, 2015 at 9:36 AM, Jérémy Bobbio <lunar at debian.org> wrote:
> Hi Juan,
>
> A few comments on your patch submission so you can get better at it. :)
>
> Juan Picca:
>> Source: mopidy
>> Version: 1.0.2
>
> This is a Debian bug report, so you need to use the full version of the
> Debian package—including the package revision number. For mopidy, that
> would mean 1.0.2-1.
>
>> Severity: normal
>
> There is no consensus that the fact that a package can't be built
> reproducibly should be considered as a bug. So for the moment, this
> should be “wishlist”: we want to improve the package, we are not fixing
> defects.
>
>> Description: Make documentation build reproducible.
>>  Use the last changelog date in generated documentation
>> Author: Juan Picca <jumapico at gmail.com>
>> Last-Update: 2015-04-28
>> ---
>> This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
>
> Anyone familiar with Debian patches will notice. Writing this line
> mostly adds noise.
>
>> --- a/docs/Makefile
>> +++ b/docs/Makefile
>> @@ -1,8 +1,10 @@
>>  # Makefile for Sphinx documentation
>>  #
>> +LAST_CHANGE=$(shell dpkg-parsechangelog -S Date -l../debian/changelog)
>> +BUILD_DATE=$(shell LC_ALL=C date -u "+%B %d, %Y" -d "$(LAST_CHANGE)")
>>
>>  # You can set these variables from the command line.
>> -SPHINXOPTS    =
>> +SPHINXOPTS    = -D today="$(BUILD_DATE)"
>>  SPHINXBUILD   = sphinx-build
>>  PAPER         =
>>  BUILDDIR      = _build
>
> The patch that you sent is a patch to be put in `debian/patches` as it
> touches upstream files. But the changes you are making to upstream files
> are very specific to the Debian package. If I take the patched version
> and remove the `debian/` directory, I'm going to get errors.
>
> Ideally, we want other distributions to be able to make their package
> reproducible. So when we need to change the upstream build system, we
> should aim at making it in a way that is agnostic to the distribution.
>
> In this specific case, you could do this by changing the upstream
> Makefile to add extra options to SPHINXOPTS only when the BUILD_DATE
> variable exists in the environment. Then BUILD_DATE can be set and
> exported in `debian/rules`.
>
> Hope that helps,
> --
> Lunar                                .''`.
> lunar at debian.org                    : :Ⓐ  :  # apt-get install anarchism
>                                     `. `'`
>                                       `-