ci.yml

name: CI

on:
  workflow_dispatch:
  push:
    branches:
      - "main"
  pull_request:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

env:
  CARGO_NET_RETRY: "10"

jobs:
  test:
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v7

      - name: Install dependencies
        run: |
          set -eux
          sudo apt-get -o Acquire::Retries=5 update
          sudo apt-get -o Acquire::Retries=5 install -y --no-install-recommends \
            build-essential pkg-config ca-certificates libsdl2-dev \
            crossbuild-essential-armhf

      - name: Rust toolchain
        run: |
          set -eux
          rustup show
          rustc --version

      # Dependencies built once and reused; saved from main only, so a pull
      # request restores it without spending the quota on its own copy.
      - name: Cache Rust dependencies
        uses: Swatinem/rust-cache@v2
        with:
          save-if: ${{ github.ref == 'refs/heads/main' }}

      - name: Format
        run: cargo fmt --check

      - name: Clippy
        run: cargo clippy --all-targets -- -D warnings

      # The integration tests are headless (no SDL): real TCP round-trips
      # against the receive server, plus the loopback send worker.
      - name: Test
        run: cargo test

      # armhf is a release target but nothing else here compiles 32-bit. No
      # linking, so only ring's C code needs the cross compiler — no SDL
      # sysroot (the release build gets one, see Cross.toml).
      - name: Check armhf
        env:
          CC_armv7_unknown_linux_gnueabihf: arm-linux-gnueabihf-gcc
        run: |
          set -eux
          rustup target add armv7-unknown-linux-gnueabihf
          cargo check --all-targets --target armv7-unknown-linux-gnueabihf