The functions are sourcing other files that define global variables,
so they will spill into the callers shell unnecessarily. We will also
add some functionality that uses traps in follow-up commits, so it's
good to limit the scope of traps too.
The image needs to be set into official mode through a helper script
(see jenkins/images.sh) and the COREOS_OFFICIAL variable needs to be
set for prod_image_util.sh/build_image_util.sh/grub_install.sh.
For now we had only "developer" images in the new pipeline.
Based on the git tag like "alpha-1234.0.0" set the channel (group) for
the image and also use this logic when finding the channel in the QEMU
update test.
ci-automation builds on the SDK container and simplifies CI automation
build tasks (SDK bootstrap, SDK container, packages, image, VMs).
See ci-automation/README.md for a brief introduction.
Signed-off-by: Thilo Fromm <thilo@kinvolk.io>
