restheart-mongo.yml

# restheart-mongo sample CI — keploy-independent end-to-end smoke +
# coverage gate.
#
# Triggers ONLY on changes under restheart-mongo/ (or this workflow
# file). Other samples in this repo have their own orthogonal CI;
# gating the whole repo on every restheart change would slow them
# all down for no benefit.
#
# What it gates:
#   * `release-coverage` — checks out the PR's base branch (main)
#     and runs the sample end-to-end: docker compose up, bootstrap
#     the admin db + collections, drive flow.sh record-traffic with
#     the per-call audit log enabled, capture the route-coverage
#     percentage from `flow.sh coverage`. This is the baseline.
#   * `build-coverage` — same end-to-end against the PR's HEAD ref.
#   * `coverage-gate` — fails the PR if `build`'s coverage drops
#     more than COVERAGE_THRESHOLD percentage points below
#     `release`. Default threshold is 1.0pp; override via repo
#     variable `RESTHEART_COVERAGE_THRESHOLD` for a tighter or
#     looser bar.
#
# On push to main, only `build-coverage` runs (no baseline to
# compare against — main IS the baseline).
#
# Standards-aligned choices:
#   * `paths:` filter on both push and pull_request triggers — the
#     canonical GH Actions way to scope a workflow to one
#     subdirectory.
#   * Job outputs (steps.<id>.outputs.coverage → needs.<job>.outputs)
#     to thread the captured percentage between jobs.
#   * `concurrency:` cancel-in-progress on the same ref so a stale
#     run doesn't waste runner minutes.
#   * actions/upload-artifact for the human-readable
#     coverage_report.txt — reviewers can inspect missing routes
#     directly from the PR's "checks" tab.
#   * marocchino/sticky-pull-request-comment for the PR-side diff
#     comment. Pinned-by-header so successive runs update the same
#     comment instead of fanning out.
#   * The compare step is plain bash + python3 (no external
#     coverage service). The sample's coverage is route-based
#     (single percentage), so the gate is a 3-line subtraction.
#
# Sample is genuinely keploy-independent here: the workflow uses
# flow.sh's $RESTHEART_FIRED_ROUTES_FILE per-call audit log as its
# numerator source, not a keploy recording. The lane scripts in
# keploy/integrations and keploy/enterprise consume the same
# flow.sh, but use the keploy/test-set-*/tests/*.yaml tree as
# their numerator (authoritative — only calls keploy actually
# CAPTURED count). Both modes are wired into
# `flow.sh::restheart_list_recorded_routes`.
name: restheart-mongo sample

on:
  pull_request:
    paths:
      - 'restheart-mongo/**'
      - '.github/workflows/restheart-mongo.yml'
  push:
    branches: [main]
    paths:
      - 'restheart-mongo/**'
      - '.github/workflows/restheart-mongo.yml'
  workflow_dispatch: {}

concurrency:
  group: restheart-mongo-${{ github.ref }}
  cancel-in-progress: true

env:
  COVERAGE_THRESHOLD: ${{ vars.RESTHEART_COVERAGE_THRESHOLD || '1.0' }}

jobs:
  build-coverage:
    name: build (current ref) coverage
    runs-on: ubuntu-latest
    timeout-minutes: 20
    outputs:
      coverage: ${{ steps.measure.outputs.coverage }}
    steps:
      - uses: actions/checkout@v4
      - id: measure
        name: Run sample end-to-end + measure coverage
        working-directory: restheart-mongo
        env:
          RESTHEART_FIRED_ROUTES_FILE: ${{ runner.temp }}/fired-routes-build.log
          RESTHEART_PHASE: ci-build
        run: ../.github/workflows/scripts/run-and-measure.sh

      - name: Upload coverage report
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: coverage-build
          path: restheart-mongo/coverage_report.txt
          if-no-files-found: warn

  release-coverage:
    if: github.event_name == 'pull_request'
    name: release (base ref) coverage
    runs-on: ubuntu-latest
    timeout-minutes: 20
    outputs:
      coverage: ${{ steps.measure.outputs.coverage || steps.empty-baseline.outputs.coverage }}
      sample-existed: ${{ steps.detect.outputs.sample-existed }}
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.base.ref }}

      # First-PR bootstrap escape hatch: the very PR that
      # introduces the restheart-mongo/ sample has no baseline
      # (restheart-mongo/ doesn't exist on the base ref). Detect
      # that and short-circuit to coverage=0; the gate then
      # treats build's coverage as the new baseline and trivially
      # passes for any percentage > 0. After the introducing PR
      # merges, every subsequent PR has a real baseline to diff
      # against.
      - id: detect
        name: Detect baseline presence
        run: |
          if [ -d restheart-mongo ] && [ -x restheart-mongo/flow.sh ]; then
            echo "sample-existed=true" >>"$GITHUB_OUTPUT"
            echo "Sample exists on base ref — running full measurement."
          else
            echo "sample-existed=false" >>"$GITHUB_OUTPUT"
            echo "No restheart-mongo/ on base ref — first-PR bootstrap; baseline coverage treated as 0%."
          fi

      - id: measure
        name: Run sample end-to-end + measure coverage
        if: steps.detect.outputs.sample-existed == 'true'
        working-directory: restheart-mongo
        env:
          RESTHEART_FIRED_ROUTES_FILE: ${{ runner.temp }}/fired-routes-release.log
          RESTHEART_PHASE: ci-release
        run: ../.github/workflows/scripts/run-and-measure.sh

      - id: empty-baseline
        name: Emit zero baseline (first-PR bootstrap)
        if: steps.detect.outputs.sample-existed != 'true'
        run: echo "coverage=0.0" >>"$GITHUB_OUTPUT"

      - name: Upload coverage report
        if: always() && steps.detect.outputs.sample-existed == 'true'
        uses: actions/upload-artifact@v4
        with:
          name: coverage-release
          path: restheart-mongo/coverage_report.txt
          if-no-files-found: warn

  coverage-gate:
    if: github.event_name == 'pull_request'
    name: coverage gate
    needs: [build-coverage, release-coverage]
    runs-on: ubuntu-latest
    steps:
      - name: Compare build vs release
        env:
          BUILD: ${{ needs.build-coverage.outputs.coverage }}
          RELEASE: ${{ needs.release-coverage.outputs.coverage }}
          THRESHOLD: ${{ env.COVERAGE_THRESHOLD }}
          BASE_REF: ${{ github.event.pull_request.base.ref }}
        run: |
          set -Eeuo pipefail
          if [ -z "${BUILD:-}" ] || [ -z "${RELEASE:-}" ]; then
            echo "::error::missing coverage outputs — build='${BUILD:-}' release='${RELEASE:-}'"
            exit 1
          fi
          drop=$(python3 -c "print(round(${RELEASE} - ${BUILD}, 2))")
          echo "Release (${BASE_REF}): ${RELEASE}%"
          echo "Build   (this PR):     ${BUILD}%"
          echo "Drop:                  ${drop}pp (threshold ${THRESHOLD}pp)"
          if python3 -c "import sys; sys.exit(0 if (${RELEASE} - ${BUILD}) > ${THRESHOLD} else 1)"; then
            echo "::error::restheart-mongo coverage dropped from ${RELEASE}% → ${BUILD}% (-${drop}pp), exceeding the ${THRESHOLD}pp threshold."
            echo "Suggested actions:"
            echo "  * Add curl(s) to flow.sh::restheart_record_traffic that exercise the routes you changed/touched."
            echo "  * If the route(s) was intentionally retired, drop it from restheart-mongo/flow.sh::restheart_list_routes' SCOPE_PATHS too so it's removed from the denominator."
            exit 1
          fi
          echo "OK — coverage delta within ${THRESHOLD}pp threshold."

      - name: Sticky PR comment
        if: ${{ !cancelled() }}
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          header: restheart-mongo-coverage
          message: |
            ### restheart-mongo sample coverage

            | ref | coverage |
            |---|---|
            | base (`${{ github.event.pull_request.base.ref }}`) | **${{ needs.release-coverage.outputs.coverage }}%** |
            | this PR | **${{ needs.build-coverage.outputs.coverage }}%** |

            Threshold: PR may not drop coverage by more than **${{ env.COVERAGE_THRESHOLD }}pp**. Override per-repo via the `RESTHEART_COVERAGE_THRESHOLD` actions variable.