charm build - exclude i386 and armhf architectures

[Haw Loeung]

Hi,

I've just set up a new charm recipe for the autocert charm. When requesting a build, the i386 and armhf builds fail. It isn't just a specific series, but for all:

kinetic - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4232/+files/buildlog_charm_ubuntu_kinetic_i386_autocert_BUILDING.txt.gz
xenial - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4209/+files/buildlog_charm_ubuntu_xenial_i386_autocert_BUILDING.txt.gz
bionic - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4215/+files/buildlog_charm_ubuntu_bionic_i386_autocert_BUILDING.txt.gz
jammy - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4226/+files/buildlog_charm_ubuntu_jammy_i386_autocert_BUILDING.txt.gz
focal - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4221/+files/buildlog_charm_ubuntu_focal_amd64_autocert_BUILDING.txt.gz

Looking at the build logs, for i386, it's failing on the "charmcraft" snap not supporting this architecture:

"""
error: snap "charmcraft" is not available on stable for this architecture
       (i386) but exists on other architectures (amd64, arm64, armhf, ppc64el,
       s390x).
"""

For armhf:

xenial - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4211/+files/buildlog_charm_ubuntu_xenial_armhf_autocert_BUILDING.txt.gz
focal - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4222/+files/buildlog_charm_ubuntu_focal_armhf_autocert_BUILDING.txt.gz
jammy - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4228/+files/buildlog_charm_ubuntu_jammy_armhf_autocert_BUILDING.txt.gz
kinetic - https://launchpad.net/~autocert-charmers/autocert-charm/+charm/autocert/+build/4234/+files/buildlog_charm_ubuntu_kinetic_armhf_autocert_BUILDING.txt.gz

That's failing because of the "charm" snap:

"""
Parts processing error: Error installing snap 'charm' from channel 'latest/stable'.
"""

Can we exclude these two architectures by default to avoid the noisy fail to build emails?

[Haw Loeung (hloeung)]

The "charm" snap has no 3.x release (nor latest/stable) for armhf & i386, so likely they dropped support for this architecture:

https://private-fileshare.canonical.com/~hloeung/tmp/a5LiVwlxsK.png

See https://snapcraft.io/charm