name: Test Build

on:
  pull_request:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

jobs:
  build:
    name: Test ${{ matrix.arch }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - arch: arm_cortex-a9_vfpv3-d16
            target: mvebu-cortexa9
            runtime_test: false

          - arch: mips_24kc
            target: ath79-generic
            runtime_test: true

          - arch: mipsel_24kc
            target: mt7621
            runtime_test: false

          - arch: powerpc_464fp
            target: apm821xx-nand
            runtime_test: false

          - arch: powerpc_8548
            target: mpc85xx-p1010
            runtime_test: false

          - arch: aarch64_cortex-a53
            target: mvebu-cortexa53
            runtime_test: true

          - arch: arm_cortex-a15_neon-vfpv4
            target: armvirt-32
            runtime_test: true

          - arch: i386_pentium-mmx
            target: x86-geode
            runtime_test: true

          - arch: x86_64
            target: x86-64
            runtime_test: true

    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Determine branch name
        run: |
          BRANCH="${GITHUB_BASE_REF#refs/heads/}"
          echo "Building for $BRANCH"
          echo "BRANCH=$BRANCH" >> $GITHUB_ENV

      - name: Determine changed packages
        run: |
          # only detect packages with changes
          PKG_ROOTS=$(find . -name Makefile | \
            grep -v ".*/src/Makefile" | \
            sed -e 's@./\(.*\)/Makefile@\1/@')
          CHANGES=$(git diff --diff-filter=d --name-only origin/$BRANCH...)

          for ROOT in $PKG_ROOTS; do
            for CHANGE in $CHANGES; do
              if [[ "$CHANGE" == "$ROOT"* ]]; then
                PACKAGES+=$(echo "$ROOT" | sed -e 's@.*/\(.*\)/@\1 @')
                break
              fi
            done
          done

          # fallback to test packages if nothing explicitly changes this is
          # should run if other mechanics in packages.git changed
          PACKAGES="${PACKAGES:-vim attendedsysupgrade-common bmon}"

          echo "Building $PACKAGES"
          echo "PACKAGES=$PACKAGES" >> $GITHUB_ENV

      - name: Generate build keys
        run: |
          sudo apt-get update
          sudo apt-get install -y signify-openbsd
          signify-openbsd -G -n -c 'DO NOT USE - OpenWrt packages feed CI' -p packages_ci.pub -s packages_ci.sec
          EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
          echo "KEY_BUILD<<$EOF" >> $GITHUB_ENV
          cat packages_ci.sec >> $GITHUB_ENV
          echo "$EOF" >> $GITHUB_ENV

      - name: Build
        uses: openwrt/gh-action-sdk@v5
        env:
          ARCH: ${{ matrix.arch }}-${{ env.BRANCH }}
          FEEDNAME: packages_ci
          INDEX: 1
          KEY_BUILD: ${{ env.KEY_BUILD }}

      - name: Move created packages to project dir
        run: cp bin/packages/${{ matrix.arch }}/packages_ci/* . || true

      - name: Collect metadata
        run: |
          MERGE_ID=$(git rev-parse --short HEAD)
          echo "MERGE_ID=$MERGE_ID" >> $GITHUB_ENV
          echo "BASE_ID=$(git rev-parse --short HEAD^1)" >> $GITHUB_ENV
          echo "HEAD_ID=$(git rev-parse --short HEAD^2)" >> $GITHUB_ENV
          PRNUMBER=${GITHUB_REF_NAME%/merge}
          echo "PRNUMBER=$PRNUMBER" >> $GITHUB_ENV
          echo "ARCHIVE_NAME=${{matrix.arch}}-PR$PRNUMBER-$MERGE_ID" >> $GITHUB_ENV

      - name: Generate metadata
        run: |
          cat << _EOF_ > PKG-INFO
          Metadata-Version: 2.1
          Name: ${{env.ARCHIVE_NAME}}
          Version: $BRANCH
          Author: $GITHUB_ACTOR
          Home-page: $GITHUB_SERVER_URL/$GITHUB_REPOSITORY/pull/$PRNUMBER
          Download-URL: $GITHUB_SERVER_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID
          Summary: $PACKAGES
          Platform: ${{ matrix.arch }}

          Packages for OpenWrt $BRANCH running on ${{matrix.arch}}, built from PR $PRNUMBER
          at commit $HEAD_ID, against $BRANCH at commit $BASE_ID, with merge SHA $MERGE_ID.

          Modified packages:
          _EOF_
          for p in $PACKAGES
          do
            echo "  "$p >> PKG-INFO
          done
          echo >> PKG-INFO
          echo Full file listing: >> PKG-INFO
          ls -al *.ipk >> PKG-INFO || true
          cat PKG-INFO

      - name: Store packages
        uses: actions/upload-artifact@v3
        with:
          name: ${{env.ARCHIVE_NAME}}-packages
          path: |
            Packages
            Packages.*
            *.ipk
            PKG-INFO

      - name: Store logs
        uses: actions/upload-artifact@v3
        with:
          name: ${{env.ARCHIVE_NAME}}-logs
          path: |
            logs/
            PKG-INFO

      - name: Remove logs
        run: sudo rm -rf logs/ || true

      - name: Check if any packages were built
        run: |
          if [ -n "$(find . -maxdepth 1 -type f -name '*.ipk' -print -quit)" ]; then
            echo "Found *.ipk files"
            HAVE_IPKS=true
          else
            echo "No *.ipk files found"
            HAVE_IPKS=false
          fi
          echo "HAVE_IPKS=$HAVE_IPKS" >> $GITHUB_ENV

      - name: Register QEMU
        if: ${{ matrix.runtime_test && fromJSON(env.HAVE_IPKS) }}
        run: |
          sudo apt-get update
          sudo apt-get install -y qemu-user-static binfmt-support
          sudo update-binfmts --import

      - name: Build Docker container
        if: ${{ matrix.runtime_test && fromJSON(env.HAVE_IPKS) }}
        run: |
          docker build -t test-container --build-arg ARCH .github/workflows/
        env:
          ARCH: ${{ matrix.arch }}-${{ env.BRANCH }}

      - name: Test via Docker container
        if: ${{ matrix.runtime_test && fromJSON(env.HAVE_IPKS) }}
        run: |
          docker run --rm -v $GITHUB_WORKSPACE:/ci test-container