ci.yml

name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

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

jobs:
  precommit:
    name: precommit (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        # Emily is Apple-Silicon only. macos-14 is arm64 (M1).
        os: [macos-14]
    env:
      MIX_ENV: test
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Setup Beam
        uses: erlef/setup-beam@v1
        with:
          version-file: .tool-versions
          version-type: strict

      - name: Cache deps
        uses: actions/cache@v4
        with:
          path: deps
          key: deps-${{ runner.os }}-${{ hashFiles('mix.lock') }}
          restore-keys: deps-${{ runner.os }}-

      - name: Cache build
        uses: actions/cache@v4
        with:
          path: _build
          key: build-${{ runner.os }}-${{ hashFiles('mix.lock', 'c_src/**', 'Makefile', '.tool-versions', '.gitmodules') }}
          restore-keys: build-${{ runner.os }}-

      # The Bumblebee cache holds tiny-random HuggingFace fixtures
      # downloaded by the conformance suite (~3 MB across 7 repos).
      # Cached by conformance test content so new fixtures invalidate;
      # restore-keys lets unrelated changes reuse the existing cache.
      - name: Cache Bumblebee fixtures
        uses: actions/cache@v4
        with:
          path: ~/Library/Caches/bumblebee
          key: bumblebee-${{ runner.os }}-${{ hashFiles('test/emily/conformance/**') }}
          restore-keys: bumblebee-${{ runner.os }}-

      - run: mix deps.get

      - run: mix precommit

      # Conformance tests are excluded from the default suite because
      # they require network access on a cold cache (see
      # test/test_helper.exs). In CI we always want them green — a
      # DistilBERT forward pass is the canonical integration signal
      # that no Nx op on the transformer critical path has regressed.
      - run: mix test --only conformance

  # ASan CI deferred: requires OTP built with --enable-sanitizers=address
  # (macOS SIP blocks DYLD_INSERT_LIBRARIES, and late-loaded libasan
  # fails). See Makefile and RELEASE.md for details.