name: release exercise
# The scratch caller (issue #9's acceptance criterion): dry wiring only —
# nothing is ever tagged, published, or bumped. Three jobs, three claims:
#
#   * `call` — a workflow_call `uses:` validates and parses the called file
#     when the run starts, so a green run proves release.yml parses and its
#     input contract wires. Both jobs inside it are gated on the push event
#     (rig's form), so a non-push caller — dispatch here, pull_request via
#     ci.yml — skips them by design.
#   * `step-replay` — the merge door's early step sequence executed for
#     real (round 1's blocking catch: `call` proves the parse but runs
#     zero steps): the two-checkout dance including the `path:
#     .ceremony-src` checkout, both branches of the self-consumption
#     bypass, the CEREMONY_DIR / RELEASE_ASSETS_DIR wiring, then facts →
#     decide → notes through the real $GITHUB_OUTPUT step plumbing — all
#     against a constructed fixture tree with a stubbed gh, so a wrong
#     `path:`, an inverted bypass, or a CEREMONY_DIR pointing nowhere fails
#     HERE, not in a consumer's release. The steps are release.yml's own,
#     copied 1:1 where the context allows; where it cannot, the deviation
#     is commented at the step.
#   * `fixture-chain` — the same script chain offline, via the contract
#     test CI runs on every PR (test/release-chain.test.sh).
#
# Runs on workflow_dispatch, and on every PR via ci.yml's workflow_call
# (PR-only there, on purpose — see ci.yml's gate comment). The live doors
# remain the stated honest gap, closed by #11 (ceremony's own 0.1.0
# release calls this exact workflow by local path) and the #13 pilot's
# rehearsal.
on:
  workflow_dispatch:
  workflow_call:

permissions:
  contents: read

jobs:
  call:
    # Dry: version-source exercises the input contract; the doors stay shut
    # on a non-push event. The real caller stub — triggers, permissions,
    # the pinned ref — lives in release.yml's header and docs/CONSUMERS.md.
    uses: ./.github/workflows/release.yml
    with:
      version-source: file

  step-replay:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        # release.yml keys its bypass on `github.repository ==
        # 'heavy-duty/ceremony'`; the matrix stands in for that condition so
        # BOTH branches run from this one repo — the dogfood repo can never
        # take the consumer branch for real, and vice versa.
        shape: [dogfood, consumer]
    steps:
      - uses: actions/checkout@v4
        with:
          # release.yml's first checkout, verbatim: the pushed head and its
          # first parent.
          ref: ${{ github.sha }}
          fetch-depth: 2
      - uses: actions/checkout@v4
        # release.yml's second checkout — the consumer path's pinned
        # ceremony source, same `path:` wiring. One forced deviation: the
        # ref is github.sha, not CEREMONY_SELF_REF — the pinned tag cannot
        # exist before the first release (the exact deadlock the bypass
        # solves), and the pin's VALUE is already guarded by
        # .github/scripts/self-ref-check.sh in CI. What this step proves is
        # the wiring: the checkout lands in .ceremony-src and every later
        # step resolves libs through it.
        if: matrix.shape == 'consumer'
        with:
          repository: ${{ github.repository }}
          ref: ${{ github.sha }}
          path: .ceremony-src
      - name: wire CEREMONY_DIR and the assets dir
        env:
          SHAPE: ${{ matrix.shape }}
        # release.yml's wiring step with the matrix standing in for the
        # GITHUB_REPOSITORY test (comment on the matrix above).
        run: |
          if [ "$SHAPE" = "dogfood" ]; then
            echo "CEREMONY_DIR=$GITHUB_WORKSPACE" >> "$GITHUB_ENV"
          else
            echo "CEREMONY_DIR=$GITHUB_WORKSPACE/.ceremony-src" >> "$GITHUB_ENV"
          fi
          mkdir -p "$RUNNER_TEMP/release-assets"
          echo "RELEASE_ASSETS_DIR=$RUNNER_TEMP/release-assets" >> "$GITHUB_ENV"
      - name: construct the fixture consumer tree and the gh stub
        # The fixture release.yml's steps run against (below): a base at
        # 0.6.9-dev armed the fragment way (#112) — changelog.d/ with its
        # marker and one fragment — then the ceremony merge: VERSION bumped
        # bare and the section stamped by the REAL assembler, the command
        # the real ceremony PR runs by hand (#112 D12), so the exercise
        # consumes the tool end to end instead of hand-writing its output.
        # Same shape as test/release-chain.test.sh. The gh stub answers the
        # one API fact the ceremony path consults (the merged
        # release-labeled PR) so nothing here talks to GitHub.
        run: |
          mkdir -p "$RUNNER_TEMP/stub"
          cat > "$RUNNER_TEMP/stub/gh" <<'EOF'
          #!/usr/bin/env bash
          if [ "$1" = api ]; then echo true; exit 0; fi
          echo "gh stub: unexpected call: gh $*" >&2
          exit 97
          EOF
          chmod +x "$RUNNER_TEMP/stub/gh"
          echo "$RUNNER_TEMP/stub" >> "$GITHUB_PATH"
          git init -q "$RUNNER_TEMP/fixture"
          cd "$RUNNER_TEMP/fixture"
          git config user.email fixture@example.invalid
          git config user.name fixture
          printf '0.6.9-dev\n' > VERSION
          cat > CHANGELOG.md <<'EOF'
          # Changelog

          ## 0.6.8 — 2026-07-01

          - An older entry.
          EOF
          mkdir changelog.d
          printf '# changelog.d/ — assembled at release (heavy-duty/ceremony#112); the marker keeps the directory tracked.\n' > changelog.d/README.md
          printf -- '- The entry this release ships (#42).\n' > changelog.d/42.md
          git add VERSION CHANGELOG.md changelog.d
          git commit -qm "base"
          printf '0.7.0\n' > VERSION
          bash "$CEREMONY_DIR/bin/changelog-assemble" 0.7.0 2026-07-21
          git add -A
          git commit -qm "release: 0.7.0"
          echo "FIXTURE_SHA=$(git rev-parse HEAD)" >> "$GITHUB_ENV"
      - name: gather the facts — version, base version, released, labeled
        id: facts
        working-directory: ${{ runner.temp }}/fixture
        env:
          MERGE_SHA: ${{ env.FIXTURE_SHA }}
          # Empty exercises the branch-create fallback: facts.sh must fall
          # back to the merge commit's first parent (#1 constraint 10).
          EVENT_BEFORE: ""
          VERSION_SOURCE: file
        # release.yml's step verbatim — same invocation, same
        # $GITHUB_OUTPUT plumbing — cwd'd at the fixture instead of the
        # workspace (the one thing a replay cannot inherit).
        run: bash "$CEREMONY_DIR/lib/facts.sh" >> "$GITHUB_OUTPUT"
      - name: 'decide: ceremony, or release-flow work under the label?'
        id: decide
        env:
          VER: ${{ steps.facts.outputs.ver }}
          BASE_VER: ${{ steps.facts.outputs.base_ver }}
          RELEASED: ${{ steps.facts.outputs.released }}
          LABELED: ${{ steps.facts.outputs.labeled }}
        # release.yml's step verbatim.
        run: |
          out="$(bash "$CEREMONY_DIR/lib/decide.sh")"
          printf '%s\n' "$out"
          printf '%s\n' "$out" | grep '^ceremony=' >> "$GITHUB_OUTPUT"
      - name: release notes — the version's own changelog section
        if: steps.decide.outputs.ceremony == 'yes'
        working-directory: ${{ runner.temp }}/fixture
        env:
          VER: ${{ steps.facts.outputs.ver }}
        # release.yml's step verbatim, cwd'd at the fixture.
        run: |
          # shellcheck source=/dev/null
          . "$CEREMONY_DIR/lib/changelog.sh"
          if ! diagnosis="$(changelog_section_problem CHANGELOG.md "$VER")"; then
            echo "CHANGELOG.md has no '## $VER' section at the merge commit — the ceremony PR must stamp it; refusing to publish an empty release" >&2
            printf '%s\n' "$diagnosis" >&2
            exit 1
          fi
          changelog_section CHANGELOG.md "$VER" > "$RUNNER_TEMP/notes.md"
          cat "$RUNNER_TEMP/notes.md"
      - name: an entry-less stamped fixture is refused by the notes predicate
        working-directory: ${{ runner.temp }}/fixture
        env:
          VER: ${{ steps.facts.outputs.ver }}
        run: |
          cp CHANGELOG.md "$RUNNER_TEMP/CHANGELOG.good.md"
          awk -v ver="$VER" '
            /^## / { in_section = ($2 == ver) }
            in_section && /^[[:space:]]*[-*][[:space:]]/ { next }
            { print }
          ' "$RUNNER_TEMP/CHANGELOG.good.md" > CHANGELOG.md
          # shellcheck source=/dev/null
          . "$CEREMONY_DIR/lib/changelog.sh"
          if diagnosis="$(changelog_section_problem CHANGELOG.md "$VER")"; then
            echo "entry-less stamped section unexpectedly passed" >&2
            exit 1
          fi
          printf '%s\n' "$diagnosis" | grep -F "section '$VER' has no entries"
          cp "$RUNNER_TEMP/CHANGELOG.good.md" CHANGELOG.md
      - name: the chain must land where the fixture says it lands
        env:
          CEREMONY: ${{ steps.decide.outputs.ceremony }}
          VER: ${{ steps.facts.outputs.ver }}
          BASE_VER: ${{ steps.facts.outputs.base_ver }}
        # Not a release.yml step — the replay's own assertion that the real
        # steps produced the facts and verdict the fixture encodes, so a
        # green job means the wiring carried real values, not empties.
        run: |
          [ "$VER" = "0.7.0" ] || { echo "ver: got '$VER'" >&2; exit 1; }
          [ "$BASE_VER" = "0.6.9-dev" ] || { echo "base_ver: got '$BASE_VER'" >&2; exit 1; }
          [ "$CEREMONY" = "yes" ] || { echo "ceremony: got '$CEREMONY'" >&2; exit 1; }
          grep -q "The entry this release ships" "$RUNNER_TEMP/notes.md" \
            || { echo "notes.md missing the fixture's entry" >&2; exit 1; }
          echo "step-replay ($CEREMONY_DIR): facts -> decide -> notes carried real values end to end"

  fixture-chain:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: the merge door's script chain against a fixture ceremony
        run: bash test/release-chain.test.sh