name: CI

on:
  push:
    branches: [main]
  pull_request:

env:
  CARGO_TERM_COLOR: always

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      # Pinned, and kept in step with `devVersion` in flake.nix, so CI and
      # the dev shell agree and a new stable release cannot turn a lint
      # failure into an unrelated red build.
      - uses: dtolnay/rust-toolchain@1.99.1
        with:
          components: rustfmt, clippy
      - run: cargo build --all-targets
      - run: cargo test
      - run: cargo fmt --check
      - run: cargo clippy --all-targets -- -D warnings

  msrv:
    name: Build on the declared MSRV
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      # Must match `rust-version` in Cargo.toml and `msrvVersion` in
      # flake.nix. Builds only — lint and format output varies by release,
      # and pinning those to the oldest supported toolchain is not useful.
      - uses: dtolnay/rust-toolchain@1.88.0
      - run: cargo test

  stable:
    name: Latest stable (advisory)
    runs-on: ubuntu-latest
    # Advisory only. The pinned `test` job is the gate; this one exists so
    # that a new stable release breaking the build or firing a new clippy
    # lint is visible before the pin moves, without failing a pull request
    # that did not cause it. Check it when bumping `devVersion`.
    continue-on-error: true
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: clippy
      - run: cargo test
      - run: cargo clippy --all-targets -- -D warnings