---
# Run CodeQL to analyze C/C++ and Python code.
name: CodeQL
on:
  pull_request:
    types: [opened, reopened, labeled, synchronize]
    branches: [master]
  push:
    branches: [master]
  schedule:
    - cron: "27 2 * * 1"
env:
  DISABLE_TELEMETRY: 1
concurrency:
  group: codeql-${{ github.ref }}
  cancel-in-progress: true
jobs:
  prepare:
    name: Prepare Jobs
    runs-on: ubuntu-latest
    outputs:
      cpp: ${{ steps.cpp.outputs.run }}
      python: ${{ steps.python.outputs.run }}
      go: ${{ steps.go.outputs.run }}
    steps:
      - name: Clone repository
        uses: actions/checkout@v4
        with:
          submodules: recursive
          fetch-depth: 0
      - name: Check if we should always run
        id: always
        run: |
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            if [ "${{ contains(github.event.pull_request.labels.*.name, 'run-ci/codeql') }}" = "true" ]; then
              echo "run=true" >> "${GITHUB_OUTPUT}"
              echo '::notice::Found ci/codeql label, unconditionally running all CodeQL checks.'
            else
              echo "run=false" >> "${GITHUB_OUTPUT}"
            fi
          else
            echo "run=true" >> "${GITHUB_OUTPUT}"
          fi
      - name: Check for C/C++ changes
        id: cpp
        run: |
          if [ "${{ steps.always.outputs.run }}" = "false" ]; then
            if git diff --name-only origin/${{ github.base_ref }} HEAD | grep -Eq '.*\.[ch](xx|\+\+)?' ; then
              echo "run=true" >> "${GITHUB_OUTPUT}"
              echo '::notice::C/C++ code has changed, need to run CodeQL.'
            else
              echo "run=false" >> "${GITHUB_OUTPUT}"
            fi
          else
            echo "run=true" >> "${GITHUB_OUTPUT}"
          fi
      - name: Check for python changes
        id: python
        run: |
          if [ "${{ steps.always.outputs.run }}" = "false" ]; then
            if git diff --name-only origin/${{ github.base_ref }} HEAD | grep -Eq 'src/collectors/python.d.plugin/.*\.py' ; then
              echo "run=true" >> "${GITHUB_OUTPUT}"
              echo '::notice::Python code has changed, need to run CodeQL.'
            else
              echo "run=false" >> "${GITHUB_OUTPUT}"
            fi
          else
            echo "run=true" >> "${GITHUB_OUTPUT}"
          fi
      - name: Check for Go changes
        id: go
        run: |
          if [ "${{ steps.always.outputs.run }}" = "false" ]; then
            if git diff --name-only origin/${{ github.base_ref }} HEAD | grep -Eq 'src/go/*\.go' ; then
              echo "run=true" >> "${GITHUB_OUTPUT}"
              echo '::notice::Go code has changed, need to run CodeQL.'
            else
              echo "run=false" >> "${GITHUB_OUTPUT}"
            fi
          else
            echo "run=true" >> "${GITHUB_OUTPUT}"
          fi

  analyze-cpp:
    name: Analyze C/C++
    runs-on: ubuntu-latest
    needs: prepare
    if: needs.prepare.outputs.cpp == 'true'
    permissions:
      security-events: write
    steps:
      - name: Git clone repository
        uses: actions/checkout@v4
        with:
          submodules: recursive
          fetch-depth: 0
      - name: Initialize CodeQL
        uses: github/codeql-action/init@v3
        with:
          languages: cpp
          config-file: ./.github/codeql/c-cpp-config.yml
      - name: Prepare environment
        run: ./packaging/installer/install-required-packages.sh --dont-wait --non-interactive netdata
      - name: Build netdata
        run: ./netdata-installer.sh --dont-start-it --disable-telemetry --dont-wait --install-prefix /tmp/install --one-time-build
      - name: Run CodeQL
        uses: github/codeql-action/analyze@v3
        with:
          category: "/language:cpp"

  analyze-python:
    name: Analyze Python
    runs-on: ubuntu-latest
    needs: prepare
    if: needs.prepare.outputs.python == 'true'
    permissions:
      security-events: write
    steps:
      - name: Git clone repository
        uses: actions/checkout@v4
        with:
          submodules: recursive
          fetch-depth: 0
      - name: Initialize CodeQL
        uses: github/codeql-action/init@v3
        with:
          config-file: ./.github/codeql/python-config.yml
          languages: python
      - name: Run CodeQL
        uses: github/codeql-action/analyze@v3
        with:
          category: "/language:python"

  analyze-go:
    name: Analyze Go
    runs-on: ubuntu-latest
    needs: prepare
    if: needs.prepare.outputs.go == 'true'
    strategy:
      matrix:
        tree:
          - src/go/collectors/go.d.plugin
    permissions:
      security-events: write
    steps:
      - name: Git clone repository
        uses: actions/checkout@v4
        with:
          submodules: recursive
          fetch-depth: 0
      - name: Initialize CodeQL
        uses: github/codeql-action/init@v3
        with:
          languages: go
      - name: Autobuild
        uses: github/codeql-action/autobuild@v3
        with:
          working-directory: ${{ matrix.tree }}
      - name: Run CodeQL
        uses: github/codeql-action/analyze@v3
        with:
          category: "/language:go"