ci.yml

name: CI

on:
  pull_request:
  push:
    branches: [main]

permissions:
  contents: read

jobs:
  gate:
    runs-on: ubuntu-latest
    env:
      # corepack auto-downloads the packageManager-pinned pnpm without an interactive prompt
      COREPACK_ENABLE_DOWNLOAD_PROMPT: "0"
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          # Need history + the base ref so Biome can diff changed files.
          fetch-depth: 0

      # pnpm@11 needs Node >=22.13. pnpm/action-setup runs its self-installer on the
      # runner's own Node-20 action runtime (ignores setup-node), so it can't install
      # pnpm 11. Use corepack instead: it runs as a normal step on the setup-node Node
      # (24, from .nvmrc) and activates the pnpm version pinned in package.json#packageManager.
      - name: Setup Node
        uses: actions/setup-node@v6
        with:
          node-version-file: .nvmrc

      - name: Enable pnpm (corepack)
        run: corepack enable

      - name: Cache pnpm store
        uses: actions/cache@v5
        with:
          path: ~/.local/share/pnpm/store
          key: pnpm-store-${{ hashFiles('pnpm-lock.yaml') }}
          restore-keys: pnpm-store-

      - name: Install
        run: pnpm install --frozen-lockfile

      - name: Typecheck
        run: pnpm typecheck

      - name: Unit tests
        run: pnpm test

      - name: Hermetic e2e
        run: pnpm test:e2e

      - name: Build smoke (renderer bundle)
        run: pnpm build

      - name: Web server parses
        run: node --check web/server.mjs

      - name: Biome (changed files only)
        # A clean checkout fails a pristine `biome check .` on pre-existing dirt
        # in untouched files, so we scope Biome to the diff. On a PR, diff against
        # the target branch; on a push to main, the previous commit.
        env:
          PR_BASE: ${{ github.base_ref }}
          PUSH_BEFORE: ${{ github.event.before }}
        run: |
          if [ -n "$PR_BASE" ]; then
            BASE="origin/$PR_BASE"
          elif git rev-parse --verify --quiet "$PUSH_BEFORE^{commit}" >/dev/null; then
            BASE="$PUSH_BEFORE"
          else
            BASE="HEAD^"
          fi
          echo "Scoping Biome to files changed since $BASE"
          BIOME_SINCE="$BASE" pnpm check:changed