# This CI job checks whether at least the smoke tests pass for the oldest
# Go/LLVM version we claim to support.

name: Version compatibility test

on:
  pull_request:
  push:
    branches:
      - dev
      - release

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

jobs:
  test-compat:
    runs-on: ubuntu-22.04 # this must be a specific version for the apt install below
    env:
      # Oldest versions currently supported by TinyGo
      LLVM: "15"
      Go: "1.24" # when updating this, also update minorMin in builder/config.go
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          submodules: true
      - name: Install Go
        uses: actions/setup-go@v6
        with:
          go-version: ${{ env.Go }}
          cache: true
      - name: Install LLVM
        run: |
          echo 'deb https://apt.llvm.org/jammy/ llvm-toolchain-jammy-${{ env.LLVM }} main' | sudo tee /etc/apt/sources.list.d/llvm.list
          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
          sudo apt-get update
          sudo apt-get install --no-install-recommends -y \
              llvm-${{ env.LLVM }}-dev \
              clang-${{ env.LLVM }} \
              libclang-${{ env.LLVM }}-dev \
              lld-${{ env.LLVM }} \
              binaryen
      - name: Restore LLVM source cache
        uses: actions/cache/restore@v5
        id: cache-llvm-source
        with:
          key: llvm-source-20-linux-compat
          path: llvm-project/compiler-rt
      - name: Download LLVM source
        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
        run: make llvm-source
      - name: Save LLVM source cache
        uses: actions/cache/save@v5
        if: steps.cache-llvm-source.outputs.cache-hit != 'true'
        with:
          key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
          path: llvm-project/compiler-rt
      - name: Go cache
        uses: actions/cache@v5
        with:
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
          key: go-build-${{ env.Go }}-llvm${{ env.LLVM }}-${{ hashFiles('go.sum') }}
      - name: Build TinyGo
        run: go install -tags=llvm${{ env.LLVM }}
      - run: tinygo version
      - run: make gen-device -j4
      - run: go test -tags=llvm${{ env.LLVM }} -short -skip=TestErrors
      - run: make smoketest XTENSA=0