systemd/.github/workflows/coverage.yml

---
# SPDX-License-Identifier: LGPL-2.1-or-later
name: coverage

on:
  schedule:
    # Calculate coverage daily at midnight
    - cron:  '0 0 * * *'

  pull_request:
    branches:
      - main
      - v[0-9]+-stable
    paths:
      - .github/workflows/coverage.yml
      - test/integration-tests/integration-test-wrapper.py

permissions:
  contents: read

jobs:
  coverage:
    runs-on: ubuntu-24.04
    if: github.repository == 'systemd/systemd' || github.repository == 'systemd/systemd-stable'

    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
      - uses: systemd/mkosi@5a476a92deca8ad54869e5d416217aa1bb137b25

      # Freeing up disk space with rm -rf can take multiple minutes. Since we don't need the extra free space
      # immediately, we remove the files in the background. However, we first move them to a different location
      # so that nothing tries to use anything in these directories anymore while we're busy deleting them.
      - name: Free disk space
        run: |
          sudo mv /usr/local /usr/local.trash
          sudo mv /opt/hostedtoolcache /opt/hostedtoolcache.trash
          sudo systemd-run rm -rf /usr/local.trash /opt/hostedtoolcache.trash

      - name: Btrfs
        run: |
          truncate --size=100G btrfs.raw
          mkfs.btrfs btrfs.raw
          sudo mkdir /mnt/mkosi
          LOOP="$(sudo losetup --find --show --direct-io=on btrfs.raw)"
          sudo mount "$LOOP" /mnt/mkosi --options compress=zstd:1,user_subvol_rm_allowed,noatime,discard=async,space_cache=v2
          sudo chown "$(id -u):$(id -g)" /mnt/mkosi
          mkdir /mnt/mkosi/tmp
          echo "TMPDIR=/mnt/mkosi/tmp" >>"$GITHUB_ENV"
          ln -s /mnt/mkosi/build build

      - name: Configure
        run: |
          tee mkosi/mkosi.local.conf <<EOF
          [Distribution]
          Distribution=arch

          [Build]
          ToolsTreeDistribution=arch
          UseSubvolumes=yes
          WithTests=no

          WorkspaceDirectory=$TMPDIR
          PackageCacheDirectory=$TMPDIR/cache

          Environment=
                  # Build debuginfo packages since we'll be publishing the packages as artifacts.
                  WITH_DEBUG=1
                  CFLAGS=-Og
                  MESON_OPTIONS=--werror
                  COVERAGE=1

          [Runtime]
          RAM=4G
          EOF

      - name: Generate secure boot key
        run: mkosi --debug genkey

      - name: Show image summary
        run: mkosi summary

      - name: Build tools tree
        run: sudo mkosi -f box -- true

      - name: Configure meson
        run: |
          sudo mkosi box -- \
            meson setup \
            --buildtype=debugoptimized \
            build

      - name: Build image
        run: sudo mkosi box -- meson compile -C build mkosi

      - name: Initial coverage report
        run: |
          sudo mkdir -p build/test/coverage
          sudo mkosi box -- \
            lcov \
            --directory build/mkosi.builddir/arch~rolling~x86-64 \
            --capture \
            --initial \
            --exclude "*.gperf" \
            --output-file build/test/coverage/initial.coverage-info \
            --base-directory src/ \
            --ignore-errors source \
            --no-external \
            --substitute "s#src/src#src#g"

      - name: Run integration tests
        run: |
          # --preserve-env makes sure all the github actions environment variables are propagated which are
          # used in integration-test-wrapper.py to construct the `gh` command line to download the journals
          # of failed tests.
          sudo --preserve-env mkosi box -- \
            env \
            TEST_RUNNER=ubuntu-24.04 \
            meson test \
            -C build \
            --no-rebuild \
            --setup=integration \
            --suite=integration-tests \
            --print-errorlogs \
            --no-stdsplit \
            --num-processes "$(($(nproc) - 1))" \
            --timeout-multiplier 2 \
            --max-lines 300

      - name: Archive failed test journals
        uses: actions/upload-artifact@v4
        if: failure() && (github.repository == 'systemd/systemd' || github.repository == 'systemd/systemd-stable')
        with:
          name: ci-coverage-${{ github.run_id }}-${{ github.run_attempt }}-arch-rolling-failed-test-journals
          path: |
            build/test/journal/*.journal
            build/meson-logs/*
          retention-days: 7

      - name: Combine coverage reports
        run: |
          lcov_args=()

          while read -r file; do
              lcov_args+=(--add-tracefile "${file}")
          done < <(find build/test/coverage -name "TEST-*.coverage-info")

          sudo mkosi box -- lcov --ignore-errors inconsistent,inconsistent "${lcov_args[@]}" --output-file build/test/coverage/everything.coverage-info

      - name: List coverage report
        run: sudo mkosi box -- lcov --ignore-errors inconsistent,inconsistent --list build/test/coverage/everything.coverage-info

      - name: Coveralls
        uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b
        if: github.repository == 'systemd/systemd' || github.repository == 'systemd/systemd-stable'
        with:
          file: build/test/coverage/everything.coverage-info