name: tailscale-action integration

# Integration tests for the official Tailscale GitHub Action
# (https://github.com/tailscale/github-action) against a self-hosted headscale.
# A nix-built headscale runs over self-signed TLS with embedded DERP and a
# regular node already joined; the action then connects a runner to that tailnet
# and its built-in ping to the existing node is the success gate. SQLite only.

on:
  workflow_dispatch:
  push:
    branches: [main]
  pull_request:
    paths:
      - ".github/workflows/tailscale-action-integration.yaml"
      - ".github/actions/headscale-up/**"
      - "hscontrol/api/v2/**"
      - "hscontrol/scope/**"
      - "hscontrol/db/oauth*.go"
      - "hscontrol/db/preauth_keys.go"
      - "hscontrol/types/oauth.go"
      - "hscontrol/state/**"
      - "hscontrol/auth*.go"
      - "hscontrol/noise.go"
      - "cmd/headscale/cli/oauth_client.go"
      - "flake.*"
      - "go.mod"

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  # The action connects a runner to headscale and pings the already-joined node.
  # Both of the action's auth modes are exercised: an OAuth client (delivered as a
  # tskey-client- secret the client resolves against headscale) and a plain auth
  # key. Ping is the pass/fail gate — real connectivity, not just registration.
  connect:
    runs-on: ubuntu-latest
    timeout-minutes: 20
    strategy:
      fail-fast: false
      matrix:
        auth: [oauth, authkey]
    steps:
      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
      - id: hs
        uses: ./.github/actions/headscale-up

      - name: Prepare ${{ matrix.auth }} credential
        id: prep
        env:
          URL: ${{ steps.hs.outputs.url }}
          PREAUTH: ${{ steps.hs.outputs.preauth }}
        run: |
          set -euo pipefail
          if [ "${{ matrix.auth }}" = "oauth" ]; then
            FULL=$(./result/bin/headscale oauth-clients create -s auth_keys -t tag:ci -o json | jq -r .key)
            # The upstream client only runs its OAuth exchange for tskey-client-
            # secrets, and reads the control URL from a baseURL= attribute on the
            # secret itself (--login-server governs registration, not the exchange).
            TS="tskey-${FULL#hskey-}?baseURL=${URL}&ephemeral=true&preauthorized=true"
            echo "::add-mask::$TS"
            echo "authkey=$TS" >> "$GITHUB_OUTPUT"
            echo "args=--login-server=${URL} --advertise-tags=tag:ci" >> "$GITHUB_OUTPUT"
          else
            echo "authkey=${PREAUTH}" >> "$GITHUB_OUTPUT"
            echo "args=--login-server=${URL}" >> "$GITHUB_OUTPUT"
          fi

      - name: Connect via the tailscale action + ping
        uses: tailscale/github-action@d1b6cd204f8dceda5b3eaad7f1f767be390056cd # v4.2.0
        with:
          authkey: ${{ steps.prep.outputs.authkey }}
          args: ${{ steps.prep.outputs.args }}
          ping: ${{ steps.hs.outputs.pre_ip }}

      - name: Assert node registered
        run: |
          set -euo pipefail
          ./result/bin/headscale nodes list -o json > nodes.json
          test "$(jq length nodes.json)" -ge 2
          if [ "${{ matrix.auth }}" = "oauth" ]; then
            jq -e '[.[] | select((.tags // []) | index("tag:ci"))] | length >= 1' nodes.json
          fi

      - name: Dump logs on failure
        if: failure()
        run: |
          for f in /tmp/hs/serve.log /tmp/pre-tailscaled.log "$HOME/tailscaled.log"; do
            echo "::group::$f"
            sudo tail -n 300 "$f" || true
            echo "::endgroup::"
          done

  # The action's remaining inputs, each connecting via an auth key with ping as
  # the connectivity gate plus a per-input assertion. Unused inputs are empty and
  # fall back to the action's defaults.
  inputs:
    runs-on: ubuntu-latest
    timeout-minutes: 20
    strategy:
      fail-fast: false
      matrix:
        include:
          - input: hostname
            hostname: feature-host
            assert: ./result/bin/headscale nodes list -o json | jq -e '[.[]|select(.givenName=="feature-host")]|length>=1'
          - input: version
            version: "1.98.4"
            # The running daemon, not just the CLI binary, must be the pinned one.
            assert: tailscale status --json | jq -e '.Version | startswith("1.98.4")'
          - input: tailscaled-args
            tailscaled_args: --verbose=1
            assert: pgrep -af 'tailscaled.*--verbose=1'
          - input: statedir
            statedir: /tmp/ts-state
            assert: sudo ls -A /tmp/ts-state | grep -q .
          - input: args
            extra_args: --accept-dns=false
            assert: sudo tailscale debug prefs | jq -e '.CorpDNS == false'
    steps:
      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
      - id: hs
        uses: ./.github/actions/headscale-up

      - name: Connect with ${{ matrix.input }}
        uses: tailscale/github-action@d1b6cd204f8dceda5b3eaad7f1f767be390056cd # v4.2.0
        with:
          authkey: ${{ steps.hs.outputs.preauth }}
          args: --login-server=${{ steps.hs.outputs.url }} ${{ matrix.extra_args }}
          hostname: ${{ matrix.hostname }}
          version: ${{ matrix.version }}
          tailscaled-args: ${{ matrix.tailscaled_args }}
          statedir: ${{ matrix.statedir }}
          ping: ${{ steps.hs.outputs.pre_ip }}

      - name: Assert ${{ matrix.input }}
        env:
          ASSERT: ${{ matrix.assert }}
        run: |
          set -euo pipefail
          bash -c "$ASSERT"

      - name: Dump logs on failure
        if: failure()
        run: |
          for f in /tmp/hs/serve.log /tmp/pre-tailscaled.log "$HOME/tailscaled.log"; do
            echo "::group::$f"
            sudo tail -n 300 "$f" || true
            echo "::endgroup::"
          done