name: build

on:
  - push
  - pull_request

jobs:
  build:
    strategy:
      matrix:
        os:
          - ubuntu_x64_8_cores
        ocaml-version:
          - '5.2.0+ox'
        oxcaml-opam-commit:
          - '231c88c2e564fdca40e15e750aacad5fb0887435'

    runs-on: ${{ matrix.os }}
    container:
      image: alpine:latest
    steps:
      # This has to come first because the `actions/*` GitHub Actions require `node`,
      # which isn't installed by default on this container image.
      - name: "Install apk packages"
        run: |
          apk add autoconf bash bubblewrap build-base clang coreutils git libstdc++ \
            libstdc++-dev libunwind-static linux-headers lld llvm20 llvm20-dev llvm20-static \
            nodejs opam rsync upx zlib-static zstd-static
          echo "PATH=/usr/lib/llvm20/bin:$PATH" >> "$GITHUB_ENV"

      - name: Checkout code
        uses: actions/checkout@v6

      # This is necessary to avoid an error of the form 'fatal: detected dubious ownership in repository ...'
      - run: git config --global --add safe.directory $(pwd)

      - uses: actions/cache@v5
        with:
          path: ~/.opam
          key: ${{ matrix.os }}-opam-${{ matrix.ocaml-version }}-${{ matrix.oxcaml-opam-commit }}-2

      - name: Use OCaml ${{ matrix.ocaml-version }}
        run: |
          export OPAMYES=1
          export OPAMJOBS=$(($(nproc) + 2))
          export OPAMROOTISOK=1
          echo "OPAMYES=1" >> "$GITHUB_ENV"
          echo "OPAMJOBS=$OPAMJOBS" >> "$GITHUB_ENV"
          echo "OPAMROOTISOK=$OPAMROOTISOK" >> "$GITHUB_ENV"

          opam init --bare -yav https://github.com/ocaml/opam-repository.git
          opam switch set ${{ matrix.ocaml-version }} 2>/dev/null || \
            opam switch create ${{ matrix.ocaml-version }} --repos "ox=git+https://github.com/oxcaml/opam-repository.git#${{ matrix.oxcaml-opam-commit }},default"

      - run: opam install . --deps-only --locked --with-test

      - run: opam exec -- dune build @fmt

      - run: opam exec -- make PROFILE=static

      - run: opam exec -- dune runtest --profile=static

      - name: Compress magic-trace executable
        run: |
          cp _build/install/default/bin/magic-trace .
          chmod u+w magic-trace
          ls -l magic-trace
          strip magic-trace
          upx -9 magic-trace

      - uses: actions/upload-artifact@v6
        with:
          name: magic-trace
          path: magic-trace
          if-no-files-found: error

      - name: Upload to GitHub releases
        if: startsWith(github.ref, 'refs/tags/')
        uses: svenstaro/upload-release-action@v2
        with:
          repo_token: ${{ secrets.GITHUB_TOKEN }}
          file: magic-trace
          asset_name: magic-trace
          tag: ${{ github.ref }}
          overwrite: true