open-standards/.github/workflows/standards-build.yml

name: standards workspaces build + test

# Build gate for every Rust workspace in the repo.
#
# It started as three. Then a toolchain bump compiled the rest for the first
# time and found FIVE more that did not build — smart-byte (47k LOC), openpay
# (six separate breakages across five crates), eoc, mesh and joule-ui — all
# broken by the same handful of upstream migrations (hmac -> KeyInit, reqwest
# feature-gating, cipher 0.4 -> 0.5, a struct gaining fields), and all invisible
# because nothing ever compiled them. Partial coverage is how that happens, so
# the matrix now covers everything.
#
# The original case, still the clearest: smart-byte-rs had never been compiled by
# anything, and it did not build. A single wrong `rand` pin — 0.10 against code
# written for 0.8, whose crypto stack requires rand_core 0.6 — silently disabled
# the entire identity pillar, BBS+ included. `cargo check` would have caught it
# on day one. An unbuilt standard is not a standard, so this workflow is the
# floor under every claim the specs make.
#
# One workflow with a matrix rather than sixteen files: the bootstrap step is
# identical everywhere, and a shared dependency change should rebuild all of
# them anyway. `fail-fast: false` so one red workspace does not mask the others.

on:
  push:
    branches: [main]
  pull_request:

# Deliberately NO `paths:` filter.
#
# The first attempt used `**/*.rs` and `**/Cargo.toml`, and the workflow then
# silently did not fire — pushes touching exactly those files triggered other
# workflows but not this one, so `**`-prefixed globs evidently do not match here
# the way they do on GitHub. A build gate that quietly fails to run is worse than
# no gate at all: it reports nothing and everyone assumes green.
#
# This is the repo-wide floor, so it runs on every push and every PR. The cost is
# CI minutes on doc-only changes. The alternative cost is what this branch spent
# a day fixing — five workspaces silently broken because nothing compiled them.

jobs:
  build:
    name: ${{ matrix.name }}
    # Spread across the fleet's runners rather than pinning every job to `linux`.
    # For most of these the runner is a capacity choice, not a correctness one —
    # and 17 jobs on a single runner queue behind whatever else is using it.
    # `jouleclaw-rs` is the exception: see its matrix entry.
    runs-on: ${{ matrix.runner }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - { name: jcp-rs,           dir: jcp/jcp-rs,                            runner: linux }
          - { name: sandbox-rs,       dir: sandbox/sandbox-rs,                    runner: linux }
          - { name: smart-byte-rs,    dir: smart-byte/smart-byte-rs,              runner: linux }
          - { name: openpay,          dir: openpay,                               runner: linux-arm64 }
          - { name: joule-code-rs,    dir: joule-code/joule-code-rs,              runner: linux-arm64 }
          - { name: map-rs,           dir: map/map-rs,                            runner: linux-arm64 }
          - { name: aac-rs,           dir: aac/aac-rs,                            runner: linux-arm64 }
          - { name: joulecontract-rs, dir: joulecontract/joulecontract-rs,        runner: linux-arm64, z3: true }
          - { name: jouledesk-rs,     dir: jouledesk/jouledesk-rs,                runner: macos }
          - { name: arl-rs,           dir: arl/arl-rs,                            runner: macos }
          - { name: sense-rs,         dir: sense/sense-rs,                        runner: macos }
          - { name: proof-rs,         dir: proof/proof-rs,                        runner: linux, z3: true }
          - { name: joulehook-rs,     dir: joulehook/joulehook-rs,                runner: macos }
          - { name: eoc-rs,           dir: eoc/eoc-rs,                            runner: linux }
          - { name: mesh-rs,          dir: mesh/mesh-rs,                          runner: linux-arm64 }
          - { name: joule-ui-rs,      dir: joule-ui/joule-ui-rs,                  runner: macos }
          # jouleclaw-rs is the one entry whose runner IS a correctness choice.
          # It reaches candle → ug → gemm, which uses inline aarch64 assembly
          # (`fmla {0:v}.8h, ...`) requiring the ARMv8.2 FP16 extension.
          # `aarch64-apple-darwin` carries target_feature="fp16" in its baseline
          # because Apple Silicon guarantees it; `aarch64-unknown-linux-gnu`
          # baselines at ARMv8.0-A and does not, so the same asm fails to
          # ASSEMBLE — a codegen error `cargo check` never reaches. Verified on a
          # native arm64 Linux container (rustc 1.98.0): without the flag, 12
          # errors; with it, 4457 tests pass.
          #
          # CAPACITY: this is by far the largest entry — its target tree is
          # ~16 GB, against a 120 GB volume on tx-dev-linux-arm64 that already
          # holds ~74 GB of other workspaces' caches. If linux-arm64 jobs start
          # failing for no apparent reason, check `df -h /mnt/lima-colima-txarm`
          # on the txarm VM before suspecting the code: a full cache volume
          # fails whatever happens to be building, not whatever changed.
          - { name: jouleclaw-rs,     dir: jouleclaw/jouleclaw-rs,                runner: linux-arm64, rustflags: "-C target-feature=+fp16" }
    steps:
      - uses: actions/checkout@v5

      # Two workspaces shell out to `z3`, and the runner image has no solver.
      #
      # This step used to be load-bearing for correctness: without a solver the
      # ladder escalated past its real rungs into a model STAND-IN that reported
      # Proved, so every goal on a solverless machine came back proved. That is
      # now fixed at the source — the real ladders hold decision procedures only
      # and an absent rung yields Unproved (proof-solvers `ladder_is_sound` and
      # `ladder_never_fabricates_a_proof_when_a_rung_is_absent`).
      #
      # So the suites pass with or without z3, and this step is kept purely for
      # COVERAGE: with a solver present the real T1 rung actually runs, and the
      # SMT paths are exercised rather than skipped. The absent-rung semantics
      # stay covered either way — that regression test uses a goal z3 cannot
      # parse, so it asserts the same thing on a machine that has one.
      #
      # Both z3 jobs are pinned to Linux runners deliberately: the macOS runner is
      # a host executor with no apt. `sudo` may or may not exist depending on
      # whether the container runs as root, so fall back to a bare invocation.
      - name: Install z3
        if: matrix.z3
        shell: bash
        run: |
          SUDO=""; [ "$(id -u)" -ne 0 ] && SUDO="sudo"
          $SUDO apt-get update -qq
          $SUDO apt-get install -y -qq z3
          z3 --version

      # The docker runner image ships no Rust at all, so rustup is bootstrapped
      # here. dtolnay/rust-toolchain cannot be used: it shells out to `rustup`,
      # which the image lacks. Harmless where cargo already exists.
      - name: Install Rust (workspace pin)
        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
          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"

      - name: Cache cargo registry + target
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            ${{ matrix.dir }}/target
          key: standards-${{ matrix.name }}-${{ hashFiles(format('{0}/Cargo.lock', matrix.dir), 'rust-toolchain.toml') }}
          restore-keys: |
            standards-${{ matrix.name }}-

      # --all-targets is load-bearing: a plain `cargo check` does not build test
      # targets, and smart-byte's dev-dependencies drifted independently of its
      # normal ones (rand_chacha 0.10 against rand 0.8). The library compiled
      # while the tests did not.
      - name: Check (all targets)
        working-directory: ${{ matrix.dir }}
        env:
          RUSTFLAGS: ${{ matrix.rustflags }}
        run: cargo check --workspace --all-targets

      - name: Test
        working-directory: ${{ matrix.dir }}
        env:
          RUSTFLAGS: ${{ matrix.rustflags }}
        run: cargo test --workspace