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name: linux-systemd-native-proof

on:
  workflow_dispatch:
  pull_request:
    paths:
      - "Cargo.toml"
      - "Cargo.lock"
      - "src/**"
      - "docs/spec/**"
      - ".github/workflows/linux-systemd-native-proof.yml"
  push:
    branches:
      - main
      - "**"
    paths:
      - "Cargo.toml"
      - "Cargo.lock"
      - "src/**"
      - "docs/spec/**"
      - ".github/workflows/linux-systemd-native-proof.yml"

concurrency:
  group: ${{ github.workflow }}-${{ github.event_name == 'push' && github.ref_name || github.run_id }}
  cancel-in-progress: true

jobs:
  native-systemd-proof:
    runs-on:
      - self-hosted
      - linux
      - orbstack
      - systemd

    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable

      - name: Hydrate cargo dependencies
        shell: bash
        run: cargo fetch --locked

      - name: Build release binary
        shell: bash
        run: cargo build --locked --offline --release --quiet

      - name: Run native systemd proof
        shell: bash
        run: |
          set -euo pipefail

          # This workflow is meant for an OrbStack-backed self-hosted Linux runner where
          # PID 1 is real systemd and `systemctl --user` is available to the job user.
          ota="$PWD/target/release/ota"
          unit="ota-systemd-native-proof.service"
          unit_dir="$HOME/.config/systemd/user"
          unit_path="$unit_dir/$unit"
          proof_root="${RUNNER_TEMP}/ota-linux-systemd-native-proof"

          mkdir -p "$unit_dir"
          rm -rf "$proof_root"
          mkdir -p "$proof_root"

          systemctl --user show-environment >/dev/null

          cleanup() {
            systemctl --user stop "$unit" >/dev/null 2>&1 || true
            rm -f "$unit_path"
            systemctl --user daemon-reload >/dev/null 2>&1 || true
          }
          trap cleanup EXIT

          cat > "$unit_path" <<'EOF'
          [Unit]
          Description=Ota native systemd proof fixture

          [Service]
          Type=simple
          ExecStart=/bin/sh -lc 'trap "exit 0" TERM INT; while :; do sleep 30; done'
          Restart=no

          [Install]
          WantedBy=default.target
          EOF

          systemctl --user daemon-reload
          systemctl --user reset-failed "$unit" >/dev/null 2>&1 || true

          cat > "$proof_root/ota.yaml" <<EOF
          version: 1
          project:
            name: linux-systemd-native-proof
            type: application
          execution:
            default_context: host
            contexts:
              host:
                backend: native
          services:
            fixture:
              manager:
                kind: host
                host:
                  kind: systemd
                  unit: $unit
                  scope: user
              readiness:
                kind: systemd_active
                interval: 1s
                retries: 10
          tasks:
            verify:
              command:
                exe: systemctl
                args:
                  - --version
              requires_services:
                - fixture
          workflows:
            default: app
            app:
              services:
                required:
                  - fixture
              run:
                task: verify
          EOF

          "$ota" validate "$proof_root" --plain

          doctor_raw_path="$proof_root/doctor.raw.txt"
          "$ota" doctor --json "$proof_root" >"$doctor_raw_path"
          cp "$doctor_raw_path" "$proof_root/doctor.json"
          python3 - <<'PY' "$proof_root/doctor.json"
          import json
          import pathlib
          import sys

          doctor = json.loads(pathlib.Path(sys.argv[1]).read_text())
          assert doctor["ok"] is True, doctor
          PY

          up_raw_path="$proof_root/up.raw.txt"
          "$ota" up --json "$proof_root" >"$up_raw_path"
          cp "$up_raw_path" "$proof_root/up.json"
          python3 - <<'PY' "$proof_root/up.json"
          import json
          import pathlib
          import sys

          up = json.loads(pathlib.Path(sys.argv[1]).read_text())
          assert up["ok"] is True, up
          PY

          systemctl --user is-active --quiet "$unit"

          proof_raw_path="$proof_root/proof.raw.txt"
          "$ota" proof runtime --json "$proof_root" >"$proof_raw_path"
          cp "$proof_raw_path" "$proof_root/proof.json"
          python3 - <<'PY' "$proof_root/proof.json"
          import json
          import pathlib
          import sys

          proof = json.loads(pathlib.Path(sys.argv[1]).read_text())
          assert proof["ok"] is True, proof
          assert proof["mode"] == "runtime-proof", proof
          assert proof["workflow"] == "app", proof
          assert proof["summary"]["verdict"] == "ready", proof
          for key in ("topology", "doctor", "up_log"):
            assert proof["artifacts"].get(key), proof
          PY

      - name: Upload proof artifacts
        id: upload-proof-artifacts
        if: always()
        continue-on-error: true
        uses: actions/upload-artifact@v7
        with:
          name: linux-systemd-native-proof-artifacts
          path: ${{ runner.temp }}/ota-linux-systemd-native-proof
          if-no-files-found: ignore

      - name: Warn when artifact upload flakes
        if: always() && steps.upload-proof-artifacts.outcome == 'failure'
        shell: bash
        run: |
          echo "::warning::proof artifacts failed to upload, but the Linux systemd native proof itself completed"
          {
            echo "### Artifact upload warning"
            echo
            echo "- workflow: linux-systemd-native-proof"
            echo "- job: native-systemd-proof"
            echo "- note: diagnostic artifact upload failed after proof execution"
          } >> "$GITHUB_STEP_SUMMARY"