[RFC PATCH 0/2] Buildchroot non-determinism

[Vijai Kumar K <Vijaikumar_Kanagarajan@mentor.com>]

Hello All,

Sometimes buildchroot-host completes long before isar-bootstrap-target
and proceeds with building packages and populates it in isar-apt.

By the time buildchroot-target is triggered, some packages are available
via isar-apt and as per the default preference[1], is installed instead
of the one from other mirrors.

This is not always the case, sometimes there is no such race and the
packages from DISTRO_APT_SOURCES mirrors are installed.

This makes buildchroot non-deterministic and affects caching.

One solution is to provide a mechanism to set preferences for
buildchroot. This way, the user would have flexibility to control the
mirrors from which certain packages are installed.

This RFC introduces 2 new variables
1. BUILDCHROOT_HOST_APT_PREFERENCES
2. BUILDCHROOT_TARGET_APT_PREFERENCES
to set the preferences for buildchroot-host/target respectively.

Ofcourse, there might be more ways to solve this problem. Happy to
discuss them here.

Thanks,
Vijai Kumar K

[1]: https://github.com/ilbers/isar/blob/919fc995fc8ecb675f8bf639ee8628f90728b1ea/meta/classes/rootfs.bbclass#L90

Vijai Kumar K (2):
  meta: Move aggregate_files to base class
  buildchroot: Add provision to specify apt preferences

 meta/classes/base.bbclass                     | 10 +++++++
 .../isar-bootstrap/isar-bootstrap.inc         | 10 -------
 .../buildchroot/buildchroot.inc               | 30 +++++++++++++++++++
 3 files changed, 40 insertions(+), 10 deletions(-)

-- 
2.25.1