Re: [RFC PATCH 0/3] Reproducible build

["Maxim Yu. Osipov" <mosipov@ilbers.de>]

Hi Claudius,

I've looked through discussion thread.

As far as I understood with the proposed approach we don't have
the ability to reproduce this tarball - it contains some unversioned 
snapshot of isar-bootstrap rootfs, containing unversioned snapshot of 
debian's packages cache used to create rootfs. It's fine if you just 
want to reproduce locally the current build from the scratch in your 
sandbox by avoiding debootstrap stage (fetching again packages, etc).

Do you have another use-case scenario in mind?

F.e. to share this tarball with other developers (linked to particular 
version of isar tree) so they can fully reproduce the build?

If yes, how do you plan to version/manage such growing list of tarballs? 
As it was mentioned in the discussion, upgrading one package from debian 
repo will result to other tarball.

Kind regards,
Maxim.

On 05/23/2018 08:32 AM, claudius.heine.ext@siemens.com wrote:

> From: Claudius Heine <ch@denx.de>
> 
> Hi,
> 
> this patchset contains a implementation of my proposed solution for
> reproducible builds.
> 
> I am currenlty not quite sure if that is the right approach, but it is
> the simplest I can think of currently.
> 
> As already described in my proposal, this patchset does the following:
> 
>    1. Takes care that the package cache in the isar-bootstrap root file
>       system contains all the packages used for this distro/architecture.
>    2. A tarball is created after the package cache contains all the
>       packages needed by the image.
>    3. This tarball can be used as the basis of subsequent builds by
>       setting a bitbake variable.
> 
> This is just a first draft of this feature, maybe we can further improve
> some steps and maybe there are better ideas to improve the usability.
> 
> Cheers,
> Claudius
> 
> Claudius Heine (3):
>    meta/isar-bootstrap-helper+dpkg.bbclass: bind mount
>      /var/cache/apt/archives
>    meta/classes/image: added isar_bootstrap_tarball task
>    meta/isar-bootstrap: add 'do_restore_from_tarball' task
> 
>   meta/classes/dpkg.bbclass                     |  5 ++++
>   meta/classes/image.bbclass                    | 10 +++++++
>   meta/classes/isar-bootstrap-helper.bbclass    |  9 ++++++-
>   .../isar-bootstrap/isar-bootstrap.bb          | 27 ++++++++++++++++++-
>   4 files changed, 49 insertions(+), 2 deletions(-)
> 


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