name: Build with Clang/LLVM

on: pull_request_target

concurrency:
  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.head_ref || github.ref }}
  cancel-in-progress: true

jobs:
  clang-build:
    runs-on: zephyr-runner-linux-x64-4xlarge
    container:
      image: zephyrprojectrtos/ci:v0.18.4
      options: '--entrypoint /bin/bash'
      volumes:
        - /repo-cache/zephyrproject:/github/cache/zephyrproject
    strategy:
      fail-fast: false
      matrix:
        platform: ["native_posix"]
    env:
      ZEPHYR_SDK_INSTALL_DIR: /opt/toolchains/zephyr-sdk-0.13.1
      CLANG_ROOT_DIR: /usr/lib/llvm-12
      COMMIT_RANGE: ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }}
      BASE_REF: ${{ github.base_ref }}
    outputs:
      report_needed: ${{ steps.twister.outputs.report_needed }}
    steps:
      - name: Clone cached Zephyr repository
        continue-on-error: true
        run: |
          git clone --shared /github/cache/zephyrproject/zephyr .
          git remote set-url origin ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}

      - name: Checkout
        uses: actions/checkout@v3
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0
          persist-credentials: false

      - name: Environment Setup
        run: |
          pip3 install GitPython
          echo "$HOME/.local/bin" >> $GITHUB_PATH
          git config --global user.email "bot@zephyrproject.org"
          git config --global user.name "Zephyr Bot"
          git rebase origin/${BASE_REF}
          git log  --pretty=oneline | head -n 10
          west init -l . || true
          west config --global update.narrow true
          # In some cases modules are left in a state where they can't be
          # updated (i.e. when we cancel a job and the builder is killed),
          # So first retry to update, if that does not work, remove all modules
          # and start over. (Workaround until we implement more robust module
          # west caching).
          west update --path-cache /github/cache/zephyrproject 2>&1 1> west.log || west update --path-cache /github/cache/zephyrproject 2>&1 1> west2.log || ( rm -rf ../modules && west update --path-cache /github/cache/zephyrproject)

      - name: Check Environment
        run: |
          cmake --version
          ${CLANG_ROOT_DIR}/bin/clang --version
          gcc --version
          ls -la

      - name: Prepare ccache timestamp/data
        id: ccache_cache_timestamp
        shell: cmake -P {0}
        run: |
          string(TIMESTAMP current_date "%Y-%m-%d-%H;%M;%S" UTC)
          string(REPLACE "/" "_" repo ${{github.repository}})
          string(REPLACE "-" "_" repo2 ${repo})
          file(APPEND $ENV{GITHUB_OUTPUT} "repo=${repo2}\n")
      - name: use cache
        id: cache-ccache
        uses: nashif/action-s3-cache@master
        with:
          key: ${{ steps.ccache_cache_timestamp.outputs.repo }}-${{ github.ref_name }}-clang-${{ matrix.platform }}-ccache
          path: /github/home/.ccache
          aws-s3-bucket: ccache.zephyrproject.org
          aws-access-key-id: ${{ vars.AWS_CCACHE_ACCESS_KEY_ID }}
          aws-secret-access-key: ${{ secrets.AWS_CCACHE_SECRET_ACCESS_KEY }}
          aws-region: us-east-2

      - name: ccache stats initial
        run: |
          test -d github/home/.ccache && rm -rf /github/home/.ccache && mv github/home/.ccache /github/home/.ccache
          ccache -M 10G -s

      - name: Run Tests with Twister
        id: twister
        run: |
          export ZEPHYR_BASE=${PWD}
          export ZEPHYR_TOOLCHAIN_VARIANT=llvm

          # check if we need to run a full twister or not based on files changed
          python3 ./scripts/ci/test_plan.py --platform ${{ matrix.platform }} -c origin/${BASE_REF}..

          # We can limit scope to just what has changed
          if [ -s testplan.csv ]; then
            echo "report_needed=1" >> $GITHUB_OUTPUT
            # Full twister but with options based on changes
            ./scripts/twister --inline-logs -M -N -v --load-tests testplan.csv --retry-failed 2
          else
            # if nothing is run, skip reporting step
            echo "report_needed=0" >> $GITHUB_OUTPUT
          fi

      - name: ccache stats post
        run: |
          ccache -s

      - name: Upload Unit Test Results
        if: always() && steps.twister.outputs.report_needed != 0
        uses: actions/upload-artifact@v3
        with:
          name: Unit Test Results (Subset ${{ matrix.platform }})
          path: twister-out/twister.xml

  clang-build-results:
    name: "Publish Unit Tests Results"
    needs: clang-build
    runs-on: ubuntu-20.04
    if: (success() || failure() ) && needs.clang-build.outputs.report_needed != 0
    steps:
      - name: Download Artifacts
        uses: actions/download-artifact@v2
        with:
          path: artifacts

      - name: Publish Unit Test Results
        uses: EnricoMi/publish-unit-test-result-action@v1
        if: always()
        with:
          check_name: Unit Test Results
          github_token: ${{ secrets.GITHUB_TOKEN }}
          files: "**/twister.xml"
          comment_mode: off