codeql-analysis.yml

name: "CodeQL and clang-tidy"

on:
  push:
  pull_request:
  schedule:
    - cron: '0 22 * * 2'

permissions: # least privileges, see https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions
  contents: read

# clang-tidy fun:
# We need to invoke clang-tidy from the correct directory, the one the product was compiled in, so that we get the correct include paths.
# This means the root for the auth, pdns/recursordist for the rec and pdns/dnsdistdist for dnsdist
# It is important that files that are used by more than one product are processed by all the products using them
# because they might have difference compilation flags.
# We have to use our own clang-tidy-diff.py because the line-filter flag only supports file names, not paths.
# Finally the GH annotations that we generate from clang-tidy.py, have to be relative to the path in the git repository, so we need to
# follow symlinks.
# How does that work? We use git diff to get the list of diffs, and git-filter.py to get the right folder depending on the product.
# Then we call clang-tidy-diff.py, which invokes clang-tidy on the correct file, deducing the line numbers from the diff, and
# merging the results for all processed files to a YAML file. Finally clang-tidy.py converts the YAML output to GitHub annotations
# (GitHub only supports 10 of these per job, the rest are not displayed) and to GitHub markdown step summary (which has no such limits).

jobs:
  analyze:
    name: Analyze
    if: ${{ !github.event.schedule || vars.SCHEDULED_CODEQL_ANALYSIS }}
    runs-on: ubuntu-22.04

    permissions:
      actions: read # for github/codeql-action/init to get workflow details
      contents: read  # for actions/checkout to fetch code
      security-events: write  # for github/codeql-action/analyze to upload SARIF results

    strategy:
      fail-fast: false
      matrix:
        # Override automatic language detection by changing the below list
        # Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
        language: ['cpp']
        product: ['auth']
        # Learn more...
        # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection

    env:
      COMPILER: gcc
      UNIT_TESTS: yes
      FUZZING_TARGETS: yes
      COVERAGE: no
      OPTIMIZATIONS: no
      # for clang-tidy only, not compilation
      CLANG_VERSION: '14'
      REPO_HOME: ${{ github.workspace }}
      DECAF_SUPPORT: no

    outputs:
      clang-tidy-annotations-auth: ${{ steps.clang-tidy-annotations-auth.outputs.failed }}

    steps:
    - uses: PowerDNS/pdns/set-ubuntu-mirror@meta
    - name: Checkout repository
      uses: actions/checkout@v4
      with:
        # We must fetch at least the immediate parents so that if this is
        # a pull request then we can checkout the head.
        fetch-depth: 2

    # Initializes the CodeQL tools for scanning.
    - name: Initialize CodeQL
      uses: github/codeql-action/init@v3
      with:
        languages: ${{ matrix.language }}
        queries: +security-and-quality
        # TODO: go through +security-and-quality (400 alerts) once, then see if we can upgrade to it

        # If you wish to specify custom queries, you can do so here or in a config file.
        # By default, queries listed here will override any specified in a config file.
        # Prefix the list here with "+" to use these queries and those in the config file.
        # queries: ./path/to/local/query, your-org/your-repo/queries@main

    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
    # If this step fails, then you should remove it and run the build manually (see below)
    # - name: Autobuild
    #   uses: github/codeql-action/autobuild@v2

    # ℹ️ Command-line programs to run using the OS shell.
    # 📚 https://git.io/JvXDl

    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
    #    and modify them (or add more) to build your code if your project
    #    uses a compiled language

    - name: Update repository metadata
      run: |
        sudo apt-get update

    - name: Install python invoke and needed libs
      run: |
        sudo apt-get -qq -y --no-install-recommends install python3 python3-pip python3-invoke python3-git python3-unidiff ccache

    - name: Install clang-tidy tools
      run: |
        inv install-clang-tidy-tools

    - name: Install dependencies for auth
      if: matrix.product == 'auth'
      run: |
        inv install-auth-build-deps
    - name: Autoreconf auth
      if: matrix.product == 'auth'
      run: |
        inv ci-autoconf
    - name: Configure auth
      if: matrix.product == 'auth'
      run: |
        inv ci-auth-configure
    - name: Build auth
      if: matrix.product == 'auth'
      run: |
        inv ci-auth-make-bear
    - run: ln -s .clang-tidy.full .clang-tidy
      if: matrix.product == 'auth'
    - name: Run clang-tidy for auth
      if: matrix.product == 'auth'
      run: git diff --no-prefix -U0 HEAD^..HEAD | python3 .github/scripts/git-filter.py --product auth | python3 .github/scripts/clang-tidy-diff.py -clang-tidy-binary /usr/bin/clang-tidy-${CLANG_VERSION} -extra-arg=-ferror-limit=0 -p0 -export-fixes clang-tidy-auth.yml
    - name: Print clang-tidy fixes YAML for auth
      if: matrix.product == 'auth'
      shell: bash
      run: |
        if [ -f clang-tidy-auth.yml ]; then
          cat clang-tidy-auth.yml
        fi
    - name: Result annotations for auth
      if: matrix.product == 'auth'
      id: clang-tidy-annotations-auth
      shell: bash
      run: |
        if [ -f clang-tidy-auth.yml ]; then
          set +e
          python3 .github/scripts/clang-tidy.py --fixes-file clang-tidy-auth.yml
          echo "failed=$?" >> $GITHUB_OUTPUT
        fi

    - name: Perform CodeQL Analysis
      uses: github/codeql-action/analyze@v3

  check-clang-tidy:
    needs: analyze
    runs-on: ubuntu-22.04
    name: Check whether clang-tidy succeeded
    steps:
      - run: |
          if [ "x${{ needs.analyze.outputs.clang-tidy-annotations-auth }}" != "x" -a "${{ needs.analyze.outputs.clang-tidy-annotations-auth }}" != "0" ]; then
            echo "::error::Auth clang-tidy failed"
            exit 1
          fi

  check-for-binaries:
    runs-on: ubuntu-22.04
    name: Force failure in case there are binaries present in a pull request
    if: ${{ github.event_name == 'pull_request' }}
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4
      with:
        fetch-depth: 2
    - run: if [[ "$(file -i --dereference $(git diff --name-only HEAD^..HEAD -- . :^fuzzing/corpus) | grep binary | grep -v 'image/' | grep -v 'inode/x-empty' | grep -v 'inode/directory')" != "" ]]; then exit 1; fi