Re: [RFC][PATCH 0/6] Isar build reproducibility

[Henning Schild <henning.schild@siemens.com>]

Am Tue, 2 Jan 2018 17:57:38 +0300
schrieb Alexander Smirnov <asmirnov@ilbers.de>:

> Hello all,
> 
> this series proposes the way how build reproducibility could be
> implemented in Isar. General idea is to get the list of all the
> necessary packages for build, fetch them and create local repo, that
> will be used for further builds/
> 
> Briefly speeking, it works like the following:
> 
> 1. User sets the list of images that should be 'reproducible' in
>    BASE_APT_IMAGES variable in local.conf file.

I am with Jan here, i would prefer an all or nothing approach.

> 2. Based on the list of images above, Isar will derive all the
> run-time and build dependencies for these images.
> 
> 3. Using multistrap, Isar will fetch the list of packages and create
> base-apt local repository.
> 
> 4. Now buildchroot and image root filesystems are generated using
> base-apt.

Patch5 makes base-apt and Isar the only repos for a rootfs/buildchroot.
How do images, not using BASE_APT, get packages that are not cached?

> Some notes:
> 
> 1. base-apt repository is mounted to buildchroot, so Isar packages are
>    able to install necessary deps via apt-get.
> 
> 2. bitbake events are used to clean up buildchroot. I haven't found
> another way how base-apt could be unmounted. So it's mounted once
> before any package starts building and unmounted by bitbake event:
>    bb.event.BuildCompleted.
> 
> This series works good with latest next. Any comments are welcome.
> 
> Happy New Year 2018! :-)

Same from me!

Henning

> With best regards,
> Alex
> 
> Alexander Smirnov (6):
>   base-apt: Introduce fetching upstream apt
>   base-apt: Add to pipeline
>   buildchroot: Switch to base-apt
>   buildchroot: Add mount/umount for 'base-apt'
>   image: Switch to base-apt
>   base-apt: Add possibility to reuse
> 
>  meta-isar/conf/local.conf.sample                   |  8 ++
>  .../recipes-core/images/files/multistrap.conf.in   | 18 +---
>  meta-isar/recipes-core/images/isar-image-base.bb   |  5 +-
>  meta/classes/dpkg-base.bbclass                     | 16 +++-
>  meta/classes/image.bbclass                         | 13 ++-
>  meta/classes/isar-events.bbclass                   | 21 +++++
>  meta/conf/isar-bitbake.conf                        |  2 +
>  meta/recipes-devtools/base-apt/base-apt.bb         | 97
> ++++++++++++++++++++++ .../base-apt/files/distributions.in
> |  3 + .../base-apt/files/multistrap.conf.in              | 28 +++++++
>  meta/recipes-devtools/buildchroot/buildchroot.bb   | 28 ++++++-
>  .../buildchroot/files/configscript.sh              |  1 -
>  .../buildchroot/files/multistrap.conf.in           | 18 +---
>  13 files changed, 217 insertions(+), 41 deletions(-)
>  create mode 100644 meta/classes/isar-events.bbclass
>  create mode 100644 meta/recipes-devtools/base-apt/base-apt.bb
>  create mode 100644
> meta/recipes-devtools/base-apt/files/distributions.in create mode
> 100644 meta/recipes-devtools/base-apt/files/multistrap.conf.in
>