[PATCH v2 0/4] Imager schroot migration

[Anton Mikanovich <amikan@ilbers.de>]

This patchset moves Isar imager from buildchroot to schroot usage as the next
step after moving to sbuild.

Imagers of every target are now running in separate schroot sessions with
independent overlays on top of basic unchanged schroot. It means we need to
open schroot session before any imager task execution and close this session
after the usage. Any changes made inside overlay will be dropped after the
usage to keep basic schroot clean.

We also need to introduce additional cleanup inside isar-events finish handler
to prevent leaving sessions in case we execute only session start task.

There are still couple of issues need to be solved before the usage:
- there are no documentaion updates
- only basic build scenarios works, CI still fails

Changes since v1:

- Rebased on next and bitbake update
- Fix some build cases

Anton Mikanovich (4):
  sbuild: Allow setting custom config paths
  imager: Migrate from buildchroot to schroot
  imager: Move image types to schroot
  events: Cleanup lost schroot sessions if any

 meta/classes/image-tools-extension.bbclass | 80 ++++++++++++++++---
 meta/classes/image.bbclass                 |  4 +-
 meta/classes/imagetypes_vm.bbclass         |  7 +-
 meta/classes/imagetypes_wic.bbclass        | 89 ++++++++--------------
 meta/classes/isar-events.bbclass           | 16 ++++
 meta/classes/sbuild.bbclass                | 51 +++++++++----
 6 files changed, 159 insertions(+), 88 deletions(-)

-- 
2.17.1