name: Build with MSVC

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

on:
  push:
    branches:
      - '4.**'
      - '5.**'
      - 'trunk'
  pull_request:

# env:
  # Fully print commands executed by Make
  # MAKEFLAGS: V=1

jobs:
  build:
    permissions: {}

    runs-on: windows-latest

    timeout-minutes: 60

    name: ${{ matrix.cc == 'cl' && 'MSVC' || 'clang-cl' }} ${{ matrix.x86_64 && '64 bits' || '32 bits' }}

    strategy:
      matrix:
        x86_64: [true, false]
        cc: [cl, clang-cl]
        exclude:
          - cc: clang-cl
            x86_64: false

    steps:
      - name: Save pristine PATH
        run: |
          echo "PRISTINE_PATH=${env:Path}" >> "${env:GITHUB_ENV}"

      - name: Set up MSVC
        uses: ilammy/msvc-dev-cmd@v1
        with:
          arch: ${{ matrix.x86_64 && 'x64' || 'x86' }}

      - name: Fetch OCaml
        uses: actions/checkout@v4
        with:
          submodules: true

      - name: Restore Cygwin cache
        uses: actions/cache/restore@v4
        env:
          PATH: ${{ env.PRISTINE_PATH }}
        with:
          path: |
            C:\cygwin-packages
          key: cygwin-packages

      - name: Install Cygwin
        uses: cygwin/cygwin-install-action@v3
        with:
          packages: make,bash,mingw64-x86_64-gcc-core
          install-dir: 'D:\cygwin'

      - name: Save Cygwin cache
        uses: actions/cache/save@v4
        env:
          PATH: ${{ env.PRISTINE_PATH }}
        with:
          path: |
            C:\cygwin-packages
          key: cygwin-packages

      - name: Compute a key to cache configure results
        shell: bash
        env:
          HOST: ${{ matrix.x86_64 && 'x86_64-pc-windows' || 'i686-pc-windows' }}
          CC: ${{ matrix.cc }}
        run: >-
          echo "AUTOCONF_CACHE_KEY=$HOST-$CC-$({ cat configure; uname; } | sha1sum | cut -c 1-7)" >> $GITHUB_ENV

      - name: Restore Autoconf cache
        uses: actions/cache/restore@v4
        with:
          path: |
            config.cache
          key: ${{ env.AUTOCONF_CACHE_KEY }}

      - name: Build OCaml
        shell: bash
        env:
          HOST: ${{ matrix.x86_64 && 'x86_64-pc-windows' || 'i686-pc-windows' }}
          CC: ${{ matrix.cc }}
        run: >-
          eval $(tools/msvs-promote-path) ;
          if ! ./configure --cache-file=config.cache --host=$HOST CC=$CC ; then
          rm -rf config.cache ;
          failed=0 ;
          ./configure --cache-file=config.cache --host=$HOST CC=$CC \
          || failed=$?;
          if ((failed)) ; then cat config.log ; exit $failed ; fi ;
          fi ;
          make -j || failed=$? ;
          if ((failed)) ; then make -j1 V=1 ; exit $failed ; fi ;
          runtime/ocamlrun ocamlc -config ;
        # Don't add indentation or comments, it breaks Bash on
        # Windows when the yaml text block scalar is processed as a
        # single line.

      - name: Save Autoconf cache
        uses: actions/cache/save@v4
        with:
          path: |
            config.cache
          key: ${{ env.AUTOCONF_CACHE_KEY }}

      - name: Assemble backend with MinGW GASM and compare
        shell: bash
        run: >-
          x86_64-w64-mingw32-gcc -c -I./runtime  -I ./flexdll -D__USE_MINGW_ANSI_STDIO=0 -DUNICODE -D_UNICODE -DWINDOWS_UNICODE=1 -DCAMLDLLIMPORT= -DIN_CAML_RUNTIME -DNATIVE_CODE -DTARGET_amd64 -DMODEL_default -DSYS_mingw64 -o runtime/amd64.o runtime/amd64.S ;
          dumpbin /disasm:nobytes runtime/amd64nt.obj > runtime/amd64nt.dump ;
          awk -f tools/ci/actions/canonicalize-dumpbin.awk runtime/amd64nt.dump runtime/amd64nt.dump > runtime/amd64nt.canonical ;
          dumpbin /disasm:nobytes runtime/amd64.o > runtime/amd64.dump ;
          awk -f tools/ci/actions/canonicalize-dumpbin.awk runtime/amd64.dump runtime/amd64.dump > runtime/amd64.canonical ;
          git diff --no-index -- runtime/amd64*.canonical ;
          wc -l runtime/amd64*.dump runtime/amd64*.canonical ;
        # ^ The final wc is there to make sure that the canonical files are
        # reasonable cleaned-up versions of the raw dumpbins and not simply
        # empty
        if: matrix.x86_64

      - name: Run the test suite
        shell: bash
        run: >-
          eval $(tools/msvs-promote-path) ;
          make -j tests ;