build-linux.yml

name: Build Linux
on:
  workflow_dispatch:
    inputs:
      ref:
        description: 'Branch/Tag to build'
        required: true
        default: 'master'
      generate_manifest:
        description: 'Update flathub manifest'
        type: boolean
        default: false
  workflow_call:
    inputs:
      ref:
        required: true
        type: string
      generate_manifest:
        type: boolean
        default: true
    secrets:
      SSH_DEPLOY_KEY:
        required: true

permissions:
  contents: read

jobs:

  # TODO: note that we currently only build for x64, as arm64 is not supported by
  #       subosito/flutter-action@v2 yet and we don't want to install flutter manually
  #       just for this workflow: https://github.com/subosito/flutter-action/issues/345
  build_linux:
    name: Build application - ${{ matrix.platform }}
    runs-on: ${{ matrix.runner }}
    outputs:
      flutter_sdk_version: ${{ steps.flutter-version.outputs.flutter_sdk_version }}
    strategy:
      matrix:
        include:
          - platform: x64
            runner: ubuntu-latest
        # - platform: arm64
        #   runner: ubuntu-24.04-arm
    steps:
      - name: Checkout application
        uses: actions/checkout@v7
        with:
          persist-credentials: false
          ref: ${{ inputs.ref }}

      - name: Read Flutter SDK version
        id: flutter-version
        run: |
          flutter_sdk_version=$(grep 'flutter-version:' .github/actions/flutter-common/action.yml | awk '{print $2}')
          echo "flutter_sdk_version=$flutter_sdk_version" >> "$GITHUB_OUTPUT"

      - name: Common setup
        uses: ./.github/actions/flutter-common

      # https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md
      - name: Build application for linux
        run: |
          sudo apt update
          sudo apt install -y pkg-config libgtk-3-dev liblzma-dev libstdc++-12-dev libsecret-1-dev libjsoncpp-dev --no-install-recommends
          flutter build linux --release
          tar -zcvf linux-${{ matrix.platform }}.tar.gz build/linux/${{ matrix.platform }}/release/bundle
      - uses: actions/upload-artifact@v7
        with:
          name: builds-linux
          path: |
            linux-${{ matrix.platform }}.tar.gz

  generate_flathub_manifest:
    runs-on: ubuntu-latest
    name: Update flathub manifest
    if: ${{ inputs.generate_manifest }}

    # If the job fails just continue, this can be done manually later
    continue-on-error: true

    needs:
      - build_linux

    steps:
      - name: Checkout application
        uses: actions/checkout@v7
        with:
          persist-credentials: false
          ref: ${{ inputs.ref }}
          # flutpak resolves the tag to its commit
          fetch-depth: 0

      - name: Common setup
        uses: ./.github/actions/flutter-common

      - name: Setup flutpak
        uses: o-murphy/flutpak/.github/actions/setup-flutpak@v0.8.7

      - name: Generate manifest with flutpak
        env:
          REF: ${{ inputs.ref }}
          FLUTTER_VERSION: ${{ needs.build_linux.outputs.flutter_sdk_version }}
        run: flutpak generate --tag "$REF" --flutter "$FLUTTER_VERSION"

      - name: Checkout flatpak-flathub repo
        uses: actions/checkout@v7
        with:
          repository: wger-project/de.wger.flutter
          ssh-key: ${{ secrets.SSH_DEPLOY_KEY }}
          path: flathub

      - name: Copy manifest to flathub repository
        working-directory: flathub
        run: |
          # The SDK module carries the Flutter version in its name, don't keep old ones
          rm -rf flutter-sdk-*.json patches
          cp -r ../flatpak/generated/. .

      - name: Push updated config to flathub repository
        working-directory: flathub
        env:
          REF: ${{ inputs.ref }}
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git checkout -b "release-$REF"
          git add -A
          git commit -m "Update to $REF"
          git push origin "release-$REF"