Snap: core22 + arm64 build target + make push

[ysbaddaden]

Upgrades to core22 (Ubuntu 22.04) from core(16) that didn't support architectures in addition to be very outdated.

Declares the arm64 target in addition to the amd64 target. Both can be built on either target, but because of the target specific tarball, they must each be built separately.

Adds the make push target as a convenient helper.

The Makefile now takes explicit variables instead of implicit environment variables:

• ARCH: any architecture supported by crystal & snap (amd64 and arm64).
• GRADE: the snap grade (devel or stable).
• CHANNEL: the snap channel (edge or edge/<branch>).

For example:

$ make ARCH=amd64 CRYSTAL_TARBALL=/tmp/workspace/build/crystal-$(CRYSTAL_VERSION)-1-linux-x86_64.tar.gz GRADE=$SNAP_GRADE
$ make ARCH=arm64 CRYSTAL_TARBALL=/tmp/workspace/build/crystal-$(CRYSTAL_VERSION)-1-linux-aarch64.tar.gz GRADE=$SNAP_GRADE
$ make push CHANNEL=$SNAP_CHANNEL

[ysbaddaden]

Back to DRAFT. It's not working, the docker image is var outdated (3 years ago) and base: core refers to Ubuntu 16 😨.

We shall upgrade to https://github.com/canonical/snapcraft-rocks and core22 or core24 (recommended). I'm testing locally, but I'm hitting issues with architecture or platform

[ysbaddaden]

Wonderful the official docker images 8_core22 and 8_core24 fail to find the core22 and core24 bases 🤦

[ysbaddaden]

After fighting for too many houurs, I found out that we don't need the snapcraft-rocks docker image, LXD or even multipass: we can just install snapd, snapcraft then build as the current user on the host itself with SNAPCRAFT_BUILD_ENVINRONMENT=host

[ysbaddaden]

I'll try to upgrade to core24 later. I can't build it from an Ubuntu 22.04 host.

[ysbaddaden]

I'm trying to get snapd & snapcraft setup on CircleCI, and I don't succeed so far.

[ysbaddaden]

It finally built 😅

https://app.circleci.com/pipelines/github/crystal-lang/crystal/20052/workflows/386b64c9-2ec5-49cb-9ff4-13e060d77169/jobs/95982

Publish is broken (needs a for loop), but that's for the circleci config to fix:

https://app.circleci.com/pipelines/github/crystal-lang/crystal/20052/workflows/386b64c9-2ec5-49cb-9ff4-13e060d77169/jobs/95988

[straight-shoota]

The OP is out of date: It should use ARCH, maybe other changes need to be mentioned as well, there or in the readme?

[straight-shoota]

question: Is it not possible to build on arm64 for amd64?

[ysbaddaden]

I suppose we can.

[ysbaddaden]

It finally succeeded:

https://app.circleci.com/pipelines/github/crystal-lang/crystal/20068/workflows/ba0fabbc-457c-4f68-99ce-ceacc19be7e4/jobs/96099

[ysbaddaden]

I added the push target to the Makefile.

CircleCI will pack and upload directly in the same job (so we avoid installing snapcraft twice) and removed the build output folder. I don't think there's much point to push them as build artifacts anymore?

[ysbaddaden]

I updated the PR description with all the latest changes.