- [X] Have you followed the [guidelines for contributing](https://github.com/snapcore/snapcraft/blob/master/CONTRIBUTING.md)? - [X] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? - [X] Have you successfully run `make lint`? - [X] Have you successfully run `pytest tests/unit`? ----- ## Overview Add support for architectures. - Snapcraft's lifecycle will execute for each `build_on`->`build_for` defined in `snapcraft.yaml`. - Only snaps where `build_on` equals the host architecture will be built. - When using `lxd` or `multipass`, a separate instance will be used for each `build_on`->`build_for` pair. 7th and final part of supporting architectures for `core22`. ## Details - Add support for `build-on` and `build-for` for `core22` snaps. - Add environmental variable `SNAPCRAFT_BUILD_FOR` to limit which snaps are built Note: For `core22` snaps, `run-on` has been replaced with `build-for`. ### Examples These example `snapcraft.yaml` snippets show how to use architectures. #### Single architecture Building on `amd64` will produce 1 snap for `amd64`. ``` architectures: - build-on: amd64 build-for: amd64 ``` #### Single architecture, shorthand This is the same as the previous example, but in a shorthand format. ``` architectures: - amd64 ``` #### Multiple architectures - Building on `amd64` will produce 1 snap for `amd64`. - Building on `arm64` will produce 1 snap for `arm64`. ``` architectures: - build-on: amd64 build-for: amd64 - build-on: arm64 build-for: arm64 ``` #### Multiple architectures, shorthand This is the same as the previous example, but in a shorthand format. ``` architectures: - amd64 - arm64 ``` #### Multiple architecture, cross-compiling - Building on `amd64` will produce 2 snaps, 1 snap for `amd64` and 1 snap for `arm64`. - Building on `arm64` will produce 1 snap for `arm64`. ``` architectures: - build-on: amd64 build-for: amd64 - build-on: [amd64, arm64] build-for: arm64 ``` #### Architecture independent For snaps that can run on any architecture (e.g. python or shell scripts), use `build-for: all`. ``` architectures: - build-on: amd64 build-for: all ``` #### Limiting builds with environmental variable The environmental variable `SNAPCRAFT_BUILD_FOR` can be used so that only 1 snap package is produced. - Running `snapcraft` on `amd64` will produce 2 snaps, 1 snap for `amd64` and 1 snap for `arm64`. - Running `SNAPCRAFT_BUILD_FOR=arm64 snapcraft` will produce 1 snap for `arm64`. ``` architectures: - build-on: amd64 build-for: amd64 - build-on: amd64 build-for: arm64 ``` (CRAFT-1173)