name: WAI HTTP delivery

# extensions/http-delivery.md: the falsification, the differential and the cache rules,
# beside the corpus checks in wai-conformance.yml.
#
# falsify — the HTTP corpus tool and its independent verifier must catch defects. Each
#   patch in wai/http-conformance/falsify/ breaks one function of wai-rs (the content
#   hash's domain, the root flag, the left-subtree rule, the chunk counter, the component
#   digest check, the Content-Range and content-coding checks, ASCII-only numbers, the
#   union, layers' place in it and their dispatch, the wai prefix's case, duplicate
#   capabilities, a record beside a fallback, the trailing-byte rule, the missing-digest
#   plan, the class merge, the base-only threshold, refused refinement responses, stale
#   bytes after a mismatch, an unanswered base, the selection digest test, the component
#   conformance that withholds an envelope's refinements; and on the
#   playlist side adjacency, rendering, bandwidths, durations, the classical master, the
#   playlist receipt and its chain, listed cids, and the adaptation policies; and on the
#   receipt side the receipt file's name, legacy groups, the parent walk and its bound,
#   the caps on files, indexes and their items, fetching each name once within budgets
#   of files and bytes, what a client holds of an object, the items a claim attaches
#   through, §3.1 step 6 for every class and the declarations it reads by name, the
#   ancestor rule, its recovery and the publisher key it uses, a claim's parent,
#   anchoring from the origin only and the request that anchors, cached logs, grants
#   files and sets held by their pins); it
#   is applied to one worktree of the head, built once and rebuilt incrementally per
#   patch under the `falsify` profile (overflow checks and debug assertions on, as in the
#   tests), and `wai_http_vectors verify` must fail naming the cases on the patch's first
#   line; the patch is then reversed and the tree must be clean. Each `http_verify.py
#   --mutate` must exit non-zero naming the cases falsify/mutations.txt lists for it; a
#   crash, or a non-zero exit that names none, is a failure. Both run in shards (falsify/run.sh --patches I/N, --mutations
#   I/N), each printing what it ran and failing unless that is exactly what was assigned
#   to it; `shards` checks the shards the matrix declares cover every patch and every
#   mutation once, so none is dropped silently.
#
# differential — the corpus verified both ways, and the differential: wai-rs writes
#   random envelopes' covered prefixes and head proofs, the Python verifier accepts every
#   one, and refuses exactly the ten it changes one chaining-value byte in.
#
# cache-conformance — the cache rules (§9). wai/cache-conformance/run.sh stages the
#   corpus's objects behind the reference origin (`wai http origin`) and runs driver.py
#   against the origin, which must pass every MUST test, and against four negative-control
#   proxies, which must each fail the tests their defect reaches. Labelled caches run only
#   where the environment provides them (/opt/wai-cache); this repository holds none, and
#   the job summary says when none ran. The reports are uploaded as an artifact.
#
# No workflow_dispatch: it does not start runs on this forge. A weekly schedule keeps the
# jobs exercised between changes.

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

on:
  pull_request:
    paths:
      - 'wai/wai-rs/src/http_binding/**'
      - 'wai/wai-rs/src/container.rs'
      - 'wai/wai-rs/src/jwp_hash.rs'
      - 'wai/wai-rs/src/bin/wai.rs'
      - 'wai/wai-rs/src/bin/wai_http_vectors.rs'
      - 'wai/wai-rs/src/bin/wai_cli/http.rs'
      - 'wai/wai-rs/src/bin/wai_cli/http_vectors.rs'
      - 'wai/wai-rs/src/bin/wai_cli/http_vectors_playlists.rs'
      - 'wai/wai-rs/src/bin/wai_cli/http_vectors_receipts.rs'
      - 'wai/wai-rs/src/bin/wai_cli/http_playlists.rs'
      # Receipts, keys, grants and sets over HTTP (§8.1–§8.5) are checked by the receipt,
      # claim, key-log and pin code, and on the Python side by their own verifiers.
      - 'wai/wai-rs/src/jwp_delivery.rs'
      - 'wai/wai-rs/src/claim_receipt.rs'
      - 'wai/wai-rs/src/claim_receipt/**'
      - 'wai/wai-rs/src/key_log.rs'
      - 'wai/wai-rs/src/pin.rs'
      # ...and by what those read with: JCS, signer identities, step 6's figures and
      # classes, and the OER receipts an energy claim names.
      - 'wai/wai-rs/src/jcs.rs'
      - 'wai/wai-rs/src/signer_id.rs'
      - 'wai/wai-rs/src/energy_class.rs'
      - 'wai/wai-rs/src/energy_figure.rs'
      - 'wai/wai-rs/src/energy_binding.rs'
      - 'wai/wai-rs/src/energy_report.rs'
      - 'wai/wai-rs/src/claim_text.rs'
      - 'wai/wai-rs/src/oer.rs'
      - 'wai/jwp-conformance/jwp_verify.py'
      - 'wai/claim-conformance/claim_verify.py'
      - 'wai/signer-conformance/signer_verify.py'
      - 'wai/oer-conformance/oer2_verify.py'
      # The playlists render through hls_render and are sealed by wai_video_manifest.
      - 'wai/wai-rs/src/hls_render.rs'
      - 'wai/wai-rs/src/wai_video_manifest.rs'
      # Playlist receipts verify Ed25519 through the shared strict rule, in Rust and Python.
      - 'wai/wai-rs/src/sig.rs'
      - 'wai/claim-conformance/_ed25519.py'
      - 'wai/pack-conformance/requirements-verify.txt'
      - 'wai/http-conformance/**'
      - 'wai/cache-conformance/**'
      - 'wai/claim-conformance/_blake3.py'
      # http_verify.py reads staged_verify.py (and through it int_payload_verify.py), and
      # the corpus carries the staged ladder's base and layers.
      - 'wai/staged-conformance/staged_verify.py'
      # staged_verify.py's component rules (SPEC §7.1) read the capability registry.
      - 'wai/staged-conformance/cases/audio_flac_rate_ladder/**'
      - 'wai/int-payload-conformance/int_payload_verify.py'
      - '.github/workflows/wai-http.yml'
  schedule:
    - cron: '17 4 * * *'

jobs:
  # The path filters above gate the trigger, which on this forge is the push delta: a
  # rebase fires them all. This gates the work, from the pull request's own diff, reading
  # the path list out of this file (scripts/pr-touches-paths.py); a push to main or the
  # schedule has no pull-request context and runs everything.
  relevant:
    name: WAI HTTP · does this change touch it
    runs-on: linux-arm64
    outputs:
      run: ${{ steps.gate.outputs.run }}
      falsify: ${{ steps.gate.outputs.falsify }}
    steps:
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0
      - id: gate
        run: |
          set -euo pipefail
          base="${{ github.event.pull_request.base.sha }}"
          head="${{ github.event.pull_request.head.sha }}"
          r=$(python3 scripts/pr-touches-paths.py .github/workflows/wai-http.yml "$base" "$head")
          echo "this change touches WAI HTTP: $r"
          echo "run=$r" >> "$GITHUB_OUTPUT"
          # The falsify shards (about an hour and a half of runner time) prove that the corpus
          # tool and its verifier catch defects: they matter when a pull request changes the
          # code the patches in http-conformance/falsify/ break, the corpus, its verifier or
          # this file. Any other change to the list above runs the corpus jobs but not the
          # shards. The nightly schedule, having no pull request, runs them all. Fails open:
          # a diff that cannot be read answers true.
          f=true
          if [ -n "$base" ] && [ -n "$head" ] && names=$(git diff --name-only "$base...$head"); then
            if grep -qE '^(wai/wai-rs/src/http_binding/|wai/http-conformance/|wai/wai-rs/src/bin/wai_http_vectors\.rs$|wai/wai-rs/src/bin/wai_cli/http|wai/wai-rs/src/(container|sig|jwp_hash|jwp_delivery|hls_render|wai_video_manifest)\.rs$|\.github/workflows/wai-http\.yml$)' <<< "$names"; then
              f=true
            else
              f=false
            fi
          fi
          echo "this change touches what the falsify shards break: $f"
          echo "falsify=$f" >> "$GITHUB_OUTPUT"

  # Every patch and every mutation runs in exactly one shard: the one whose index mod N
  # it is, in the sorted list. The shards job reads the list below; keep it on one line.
  falsify:
    name: HTTP corpus · falsify ${{ matrix.shard }}
    needs: relevant
    if: needs.relevant.outputs.falsify == 'true'
    runs-on: linux-arm64
    strategy:
      fail-fast: false
      matrix:
        shard: ['patches 0/3', 'patches 1/3', 'patches 2/3', 'mutations 0/3', 'mutations 1/3', 'mutations 2/3']
    steps:
      - uses: actions/checkout@v5

      - name: Install Rust 1.98.0
        if: startsWith(matrix.shard, 'patches')
        shell: bash
        run: |
          export PATH="$HOME/.cargo/bin:$PATH"
          command -v rustup >/dev/null 2>&1 || \
            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain 1.98.0
          rustup toolchain install 1.98.0 --profile minimal
          rustup default 1.98.0
          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"

      - uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      # http_verify.py checks the receipt and key cases through the corpora's receipt,
      # claim and key-discovery verifiers, which check Ed25519's equation with this
      # package; its mutations reach those cases.
      - name: Install the Ed25519 library
        shell: bash
        run: python -m pip install --require-hashes -r wai/pack-conformance/requirements-verify.txt

      - name: Every patch or mutation of this shard is caught
        shell: bash
        env:
          CARGO_TARGET_DIR: ${{ runner.temp }}/falsify-target
          SHARD: ${{ matrix.shard }}
        run: |
          git config --global --add safe.directory "$GITHUB_WORKSPACE"
          set -- $SHARD
          bash wai/http-conformance/falsify/run.sh "$RUNNER_TEMP/falsify" "--$1" "$2"

  # The shards the matrix above declares cover every patch and every mutation exactly
  # once: a shard dropped from the list, or a total that disagrees, fails here.
  shards:
    name: HTTP corpus · every patch and mutation in exactly one shard
    needs: relevant
    if: needs.relevant.outputs.run == 'true'
    runs-on: linux-arm64
    steps:
      - uses: actions/checkout@v5
      - shell: bash
        run: |
          set -euo pipefail
          line=$(grep -E "^ +shard: \[" .github/workflows/wai-http.yml)
          mapfile -t shards < <(printf '%s\n' "$line" | grep -oE "'(patches|mutations) [0-9]+/[0-9]+'" | tr -d "'")
          bash wai/http-conformance/falsify/run.sh "$RUNNER_TEMP/falsify" --check-shards "${shards[@]}"

  differential:
    name: HTTP corpus · verified both ways, and the differential
    needs: relevant
    if: needs.relevant.outputs.run == 'true'
    runs-on: linux-arm64
    steps:
      - uses: actions/checkout@v5

      - name: Install Rust 1.98.0
        shell: bash
        run: |
          export PATH="$HOME/.cargo/bin:$PATH"
          command -v rustup >/dev/null 2>&1 || \
            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain 1.98.0
          rustup toolchain install 1.98.0 --profile minimal
          rustup default 1.98.0
          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"

      - uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Install the Ed25519 library
        shell: bash
        run: python -m pip install --require-hashes -r wai/pack-conformance/requirements-verify.txt

      - name: The corpus, both ways; the differential
        shell: bash
        env:
          CARGO_TARGET_DIR: ${{ runner.temp }}/falsify-target
        run: |
          set -euo pipefail
          git config --global --add safe.directory "$GITHUB_WORKSPACE"
          (cd wai/wai-rs && cargo build --profile falsify --no-default-features --features http,video_manifest,key_discovery --bin wai_http_vectors)
          "$CARGO_TARGET_DIR/falsify/wai_http_vectors" verify wai/http-conformance
          (cd wai/http-conformance && python3 -I http_verify.py .)
          bash wai/http-conformance/falsify/run.sh "$RUNNER_TEMP/falsify" --differential

  cache-conformance:
    name: cache rules · controls and labelled caches
    needs: relevant
    if: needs.relevant.outputs.run == 'true'
    runs-on: linux-arm64
    steps:
      - uses: actions/checkout@v5

      - name: Install Rust 1.98.0
        shell: bash
        run: |
          export PATH="$HOME/.cargo/bin:$PATH"
          command -v rustup >/dev/null 2>&1 || \
            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain 1.98.0
          rustup toolchain install 1.98.0 --profile minimal
          rustup default 1.98.0
          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"

      - uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Build the reference origin
        working-directory: wai/wai-rs
        shell: bash
        run: cargo build --release --no-default-features --features http --bin wai

      # The verdict: run.sh exits non-zero when the origin fails a MUST test, a control is
      # not caught, or a labelled cache fails one.
      - name: The origin passes, the controls are caught, labelled caches report
        shell: bash
        run: WAI="$GITHUB_WORKSPACE/wai/wai-rs/target/release/wai" bash wai/cache-conformance/run.sh "$RUNNER_TEMP/cache"

      # The evidence in the log, whatever becomes of the upload: each report's path and
      # SHA-256, and the summary.
      - name: The reports, in the log
        if: always()
        shell: bash
        run: |
          cd "$RUNNER_TEMP/cache/reports" 2>/dev/null || { echo "no reports were written"; exit 0; }
          for f in *; do printf '%s  %s\n' "$(sha256sum "$f" | cut -d' ' -f1)" "$RUNNER_TEMP/cache/reports/$f"; done
          cat summary.md 2>/dev/null || true

      # An upload this forge cannot take must not decide the job: the verdict is the step
      # above it.
      - name: Upload the reports
        if: always()
        continue-on-error: true
        uses: actions/upload-artifact@v3
        with:
          name: cache-conformance-reports
          path: ${{ runner.temp }}/cache/reports