cppcheck-differential.yaml

name: cppcheck-differential

on:
  pull_request:

jobs:
  cppcheck-differential:
    runs-on: ubuntu-latest

    steps:
      - name: Set PR fetch depth
        run: echo "PR_FETCH_DEPTH=$(( ${{ github.event.pull_request.commits }} + 1 ))" >> "${GITHUB_ENV}"

      - name: Checkout PR branch and all PR commits
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: ${{ env.PR_FETCH_DEPTH }}

      - name: Install dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y git

      - name: Install colcon
        run: |
          sudo sh -c 'echo "deb [arch=amd64,arm64] http://repo.ros2.org/ubuntu/main `lsb_release -cs` main" > /etc/apt/sources.list.d/ros2-latest.list'
          curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc | sudo apt-key add -
          sudo apt update
          sudo apt install python3-colcon-common-extensions

      # cppcheck from apt does not yet support --check-level args, and thus install from snap
      - name: Install Cppcheck from snap
        run: |
          sudo snap install cppcheck

      - name: Fetch the base branch with enough history for a common merge-base commit
        run: git fetch origin ${{ github.base_ref }}
        shell: bash

      - name: Get modified packages
        id: get-modified-packages
        uses: autowarefoundation/autoware-github-actions/get-modified-packages@v1

      - name: Get full paths of modified packages
        id: get-full-paths
        run: |
          modified_packages="${{ steps.get-modified-packages.outputs.modified-packages }}"
          paths=""
          for pkg in $modified_packages; do
            path=$(colcon list --packages-select $pkg | awk '{print $2}' | xargs realpath)
            paths="$paths $path"
          done
          echo "full-paths=$paths" >> $GITHUB_OUTPUT

      - name: Filter packages with no cpp/hpp files
        id: filter-paths-no-cpp-files
        run: |
          filtered_paths=""
          for dir in ${{ steps.get-full-paths.outputs.full-paths }}; do
            if [ -d "$dir" ] && find "$dir" -name "*.cpp" | grep -q .; then
              filtered_paths="$filtered_paths $dir"
            fi
          done
          echo "filtered-full-paths=$filtered_paths" >> $GITHUB_OUTPUT

      # cspell: ignore suppr
      - name: Run Cppcheck on modified packages
        if: ${{ steps.filter-paths-no-cpp-files.outputs.filtered-full-paths != '' }}
        continue-on-error: true
        id: cppcheck
        run: |
          echo "Running Cppcheck on modified packages: ${{ steps.filter-paths-no-cpp-files.outputs.filtered-full-paths }}"
          cppcheck --enable=all --inconclusive --check-level=exhaustive -D'PLUGINLIB_EXPORT_CLASS(class_type, base_class)=' -Dslots= -DQ_SLOTS= --error-exitcode=1 --suppressions-list=.cppcheck_suppressions --inline-suppr ${{ steps.filter-paths-no-cpp-files.outputs.filtered-full-paths }} 2> cppcheck-report.txt
        shell: bash

      - name: Setup Problem Matchers for cppcheck
        if: ${{ steps.filter-paths-no-cpp-files.outputs.filtered-full-paths != '' }}
        run: echo "::add-matcher::.github/cppcheck-problem-matcher.json"

      - name: Show cppcheck-report result
        if: ${{ steps.filter-paths-no-cpp-files.outputs.filtered-full-paths != '' }}
        run: |
          cat cppcheck-report.txt

      - name: Upload Cppcheck report
        if: ${{ steps.filter-paths-no-cpp-files.outputs.filtered-full-paths != '' }}
        uses: actions/upload-artifact@v4
        with:
          name: cppcheck-report
          path: cppcheck-report.txt

      - name: Fail the job if Cppcheck failed
        if: ${{ steps.filter-paths-no-cpp-files.outputs.filtered-full-paths != '' && steps.cppcheck.outcome == 'failure' }}
        run: exit 1