snap.yml

name: Snap Build

on:
  workflow_dispatch:

env:
  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

permissions:
  contents: read

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        include:
          - { runner: ubuntu-24.04,     arch: amd64 }
          - { runner: ubuntu-24.04-arm, arch: arm64 }
    runs-on: ${{ matrix.runner }}
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Setup LXD
        uses: canonical/setup-lxd@8c6a87bfb56aa48f3fb9b830baa18562d8bfd4ee # v1

      - name: Install Snapcraft
        run: |
          # core24 + the `gnome` extension are fully supported by stable Snapcraft.
          # (We moved off core26 because the gnome extension — required for GTK4 —
          # does not support core26 yet; see snapcraft#6185 and RustConn#174.)
          sudo snap install snapcraft --classic
          snapcraft --version

      - name: Build Snap
        id: build
        run: |
          # The `gnome` extension pulls build-snaps (mesa-2404, gnome-46-2404-sdk)
          # from the store during "Installing build-snaps". On the arm64 runner
          # this intermittently fails with "Error installing snap 'mesa-2404'
          # from channel 'latest/stable'" (transient store/network flakiness).
          # Retry the whole pack a few times: snapcraft is incremental (no
          # `clean`), so a retry only re-runs the failed build-snap install.
          for attempt in 1 2 3; do
            if snapcraft pack --verbose; then break; fi
            [ "$attempt" = 3 ] && { echo "::error::snapcraft pack failed after 3 attempts"; exit 1; }
            echo "::warning::snapcraft pack attempt $attempt failed (often a transient build-snap install error); retrying in 30s"
            sleep 30
          done
          SNAP_FILE=$(ls *.snap)
          echo "snap=$SNAP_FILE" >> $GITHUB_OUTPUT
          echo "Built: $SNAP_FILE"

      - name: Upload Snap artifact
        uses: actions/upload-artifact@v6
        with:
          name: snap-${{ github.ref_name }}-${{ matrix.arch }}
          path: ${{ steps.build.outputs.snap }}