Build on multiple architectures with github actions

snapcraft
1

Hello,

When building the snap on my Macbook M1 laptop for an arm64 architecture, the variable “$CRAFT_ARCH_TRIPLET_BUILD_FOR” value is “aarch64-linux-gnu”.

But when building it through the github action “https://github.com/snapcore/action-build/tree/v1/”, the variable value is “x86_64-linux-gnu”.

This leads to an inconsistency when setting up the env variable “LD_LIBRARY_PATH:” to point to the correct staged libraries… making ffmpeg arguing about missing libraries in my raspberry if installing the snap that was builded with the github action.

This is my snapcraft.yaml:

name: rackety-nuc-script
summary: firmware for rackety nucs
description: firmware that lets nucs connect to the rackety network and record videos
version: 1.0.0
base: core22
grade: stable
confinement: strict
architectures:
    - build-on: [amd64, arm64]
      build-for: [arm64]
    - build-on: [amd64, arm64]
      build-for: [amd64]
plugs:
    ffmpeg-2204:
        interface: content
        target: ffmpeg-platform
        default-provider: ffmpeg-2204
parts:
    rackety-nuc-script:
        plugin: python
        source: .
        stage-packages:
            - libxcb-randr0-dev
            - libxcb-xtest0-dev
            - libxcb-xinerama0-dev
            - libxcb-shape0-dev
            - libxcb-xkb-dev
            - libgl1-mesa-dev
            - libxcb1
            - libxcb-shm0
            - libxcb-xfixes0
            - libasound2
            - libcaca0
            - libv4l-0
            - libva-dev
            - libfontconfig1
            - libvpx-dev
            - libvpx7
            - libwebpmux3
            - librsvg2-2
            - librsvg2-dev
            - librsvg2-common
            - libglu1-mesa
            - libopenjp2-7
            - freeglut3
            - libspeex-dev
            - libtheora0
            - libtwolame-dev
            - libpulse-dev
            - libpulse0
            - libraw1394-dev
            - libxcursor-dev
            - libxinerama-dev
            - libxrandr-dev
            - libxkbcommon-dev
            - libarchive-dev
            - libmpg123-0
            - libsamplerate-dev
            - libgomp1
apps:
    rackety-nuc-script:
        environment:
            PATH: $SNAP/ffmpeg-platform/usr/bin:$PATH
            LD_LIBRARY_PATH: $SNAP/ffmpeg-platform/usr/lib/$CRAFT_ARCH_TRIPLET_BUILD_FOR:$LD_LIBRARY_PATH:$SNAP/usr/lib/$CRAFT_ARCH_TRIPLET_BUILD_FOR/pulseaudio
        command: bin/rackety-nuc-script
        plugs:
            - network
            - network-observe
        daemon: simple
2

In github action it’s build in amd64 and in your mac it’s build in arm64. The CRAFT_ARCH_TRIPLET_BUILD_FOR represents the architecture triplet, the snap is built for. If you use github actions it’ll use amd64 only. Use remote-build if you need for arm or local build

3

Hello @soumyaDghosh,

I couldn’t use the remote-build because the code is private for the moment.

I actually found the way to perform the build using github actions for both architectures, thanks to this action https://github.com/marketplace/actions/snapcraft-multiarch-build from @lucyllewy

I will paste the code of the workflow and the snapcraft.yaml file that I used here for anyone that needs this working:

Github Workflow

name: publish to snap store
on: [push]

jobs:
    build:
        runs-on: ubuntu-latest
        if: github.ref == 'refs/heads/main'
        strategy:
            matrix:
                platform:
                    - amd64
                    - arm64
        steps:
            - uses: actions/checkout@v4
            - uses: docker/setup-qemu-action@v1
            - uses: diddlesnaps/snapcraft-multiarch-action@v1
              id: snapcraft
              with:
                  architecture: ${{ matrix.platform }}
            - uses: snapcore/action-publish@v1
              env:
                  SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.SNAP_STORE_LOGIN }}
              with:
                  snap: ${{ steps.snapcraft.outputs.snap }}
                  release: edge

Snapcraft.yaml

name: rackety-nuc-script
summary: firmware for rackety nucs
description: firmware that lets nucs connect to the rackety network and record videos
version: 1.0.0
base: core22
grade: stable
confinement: strict
architectures:
    - build-on: [arm64]
    - build-on: [amd64]
plugs:
    ffmpeg-2204:
        interface: content
        target: ffmpeg-platform
        default-provider: ffmpeg-2204
parts:
    rackety-nuc-script:
        plugin: python
        source: .
        stage-packages:
            - libxcb-randr0-dev
            - libxcb-xtest0-dev
            - libxcb-xinerama0-dev
            - libxcb-shape0-dev
            - libxcb-xkb-dev
            - libgl1-mesa-dev
            - libxcb1
            - libxcb-shm0
            - libxcb-xfixes0
            - libasound2
            - libcaca0
            - libv4l-0
            - libva-dev
            - libfontconfig1
            - libvpx-dev
            - libvpx7
            - libwebpmux3
            - librsvg2-2
            - librsvg2-dev
            - librsvg2-common
            - libglu1-mesa
            - libopenjp2-7
            - freeglut3
            - libspeex-dev
            - libtheora0
            - libtwolame-dev
            - libpulse-dev
            - libpulse0
            - libraw1394-dev
            - libxcursor-dev
            - libxinerama-dev
            - libxrandr-dev
            - libxkbcommon-dev
            - libarchive-dev
            - libmpg123-0
            - libsamplerate-dev
            - libgomp1
apps:
    rackety-nuc-script:
        environment:
            PATH: $SNAP/ffmpeg-platform/usr/bin:$PATH
            LD_LIBRARY_PATH: $SNAP/ffmpeg-platform/usr/lib/$CRAFT_ARCH_TRIPLET_BUILD_FOR:$LD_LIBRARY_PATH:$SNAP/usr/lib/$CRAFT_ARCH_TRIPLET_BUILD_FOR/pulseaudio
        command: bin/rackety-nuc-script
        plugs:
            - network
            - network-observe
        daemon: simple
2 Likes
4

Don’t need this one, if you don’t want to release the file in edge channel of the store