name: ci

# Deliberately not triggered by pull_request.
#
# The forge this runs on is public and takes pull requests from strangers, and a
# runner executes whatever the workflow checks out. Triggering on pull_request
# would mean a stranger's first contribution runs code on the runner host before
# anyone has read it. Triggering only on push means the runner only ever executes
# code that someone with push rights put there.
#
# The cost is that a pull request gets no automatic check. Run it by pushing the
# branch yourself once you have read the diff.
on:
  push:
    branches: ['**']
    tags-ignore: ['**']

jobs:
  test:
    runs-on: docker
    container:
      image: rust:1.98-bookworm
    steps:
      - uses: actions/checkout@v4

      - name: Cache cargo
        uses: actions/cache@v4
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: cargo-${{ runner.os }}-${{ hashFiles('Cargo.lock') }}
          restore-keys: cargo-${{ runner.os }}-

      # No `cargo fmt --check`. The tables in this crate are aligned by hand —
      # MONTHS, JURISDICTIONS — and rustfmt wants one entry per line, which loses
      # the shape that makes them readable. A gate that fights the house style is
      # a gate that gets ignored.
      - name: Lint
        run: |
          rustup component add clippy
          cargo clippy --all-targets -- -D warnings
          # The binding code only exists under the feature, so a bare clippy
          # run never looks at src/python.rs.
          cargo clippy --features python --all-targets -- -D warnings

      - name: Rust tests
        run: cargo test

      # The CLI and the bindings are the same engine, so they have to agree. This
      # is the check that caught the bindings resolving their own default
      # jurisdiction while the CLI read the configured one.
      - name: Python bindings
        run: |
          apt-get update && apt-get install -y --no-install-recommends python3 python3-venv python3-dev
          python3 -m venv /tmp/venv
          /tmp/venv/bin/pip install --quiet maturin pytest mypy
          cargo build --release
          /tmp/venv/bin/maturin build --release --out dist
          /tmp/venv/bin/pip install --quiet --no-index --find-links dist typikon
          /tmp/venv/bin/python -m pytest tests/python -q

      - name: Type stubs
        run: |
          cat > /tmp/typecheck.py <<'EOF'
          import datetime, typikon
          d: typikon.Day = typikon.describe(datetime.date(2026, 4, 12))
          day: datetime.date = d.date
          feast: str | None = d.feast
          n: int = d.days_to_pascha
          EOF
          /tmp/venv/bin/python -m mypy --strict /tmp/typecheck.py