name: Build msvcrt toolchains
on:
  workflow_dispatch:
    inputs:
      ref:
        description: 'Ref to extract from'
        type: string
        default: 'master'
      upload:
        description: 'Upload the artifacts'
        type: boolean
        default: false

permissions:
  contents: read

jobs:
  prepare:
    runs-on: ubuntu-latest
    outputs:
      LLVM_VERSION: ${{steps.get-parameters.outputs.LLVM_VERSION}}
      MINGW_W64_VERSION: ${{steps.get-parameters.outputs.MINGW_W64_VERSION}}
      PYTHON_VERSION_MINGW: ${{steps.get-parameters.outputs.PYTHON_VERSION_MINGW}}
      TAG: ${{steps.get-parameters.outputs.TAG}}
      COMMIT_DATE_UNIX: ${{steps.get-parameters.outputs.COMMIT_DATE_UNIX}}
      BUILD_DATE: ${{steps.get-parameters.outputs.BUILD_DATE}}
      BUILD_DATE_UNIX: ${{steps.get-parameters.outputs.BUILD_DATE_UNIX}}
    steps:
      - name: Download build parameters
        uses: dawidd6/action-download-artifact@v10
        with:
          workflow: build.yml
          workflow_conclusion: success
          ref: ${{github.event_name == 'workflow_dispatch' && inputs.ref || 'master'}}
          event: ${{github.event_name == 'workflow_dispatch' && 'push' || 'schedule'}}
          name: parameters
      - name: Get build parameters
        id: get-parameters
        run: |
          cat parameters.txt >> $GITHUB_OUTPUT
          cat $GITHUB_OUTPUT

  # Build a new toolchain with a different CRT choice.
  linux-msvcrt:
    needs: [prepare]
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{github.event_name == 'workflow_dispatch' && inputs.ref || 'master'}}
      - name: Download toolchain
        uses: dawidd6/action-download-artifact@v10
        with:
          workflow: build.yml
          workflow_conclusion: success
          ref: ${{github.event_name == 'workflow_dispatch' && inputs.ref || 'master'}}
          event: ${{github.event_name == 'workflow_dispatch' && 'push' || 'schedule'}}
          name: linux-ucrt-x86_64-toolchain
      - name: Unpack original toolchain
        run: |
          tar -Jxf llvm-mingw-*.tar.xz
          rm llvm-mingw-*.tar.xz
          mkdir install
          mv llvm-mingw* install/llvm-mingw
      - name: Build
        env:
          LLVM_VERSION: ${{needs.prepare.outputs.LLVM_VERSION}}
          MINGW_W64_VERSION: ${{needs.prepare.outputs.MINGW_W64_VERSION}}
          TAG: ${{needs.prepare.outputs.TAG}}
          SOURCE_DATE_EPOCH: ${{needs.prepare.outputs.COMMIT_DATE_UNIX}}
          BUILD_DATE: ${{needs.prepare.outputs.BUILD_DATE}}
        run: |
          ./build-all.sh $(pwd)/install/llvm-mingw --no-tools --wipe-runtimes --with-default-msvcrt=msvcrt
          .github/workflows/store-version.sh install/llvm-mingw/versions.txt
          cd install
          DISTRO=ubuntu-$(grep DISTRIB_RELEASE /etc/lsb-release | cut -f 2 -d =)-$(uname -m)
          NAME=llvm-mingw-$TAG-msvcrt-$DISTRO
          mv llvm-mingw $NAME
          tar -Jcf ../$NAME.tar.xz --format=ustar --numeric-owner --owner=0 --group=0 --sort=name --mtime="$BUILD_DATE" $NAME
      - uses: actions/upload-artifact@v4
        with:
          name: linux-msvcrt-x86_64-toolchain
          path: |
            llvm-mingw-*.tar.xz
          retention-days: 7

  linux-cross-windows:
    needs: [linux-msvcrt, prepare]
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - { arch: i686, crt: msvcrt }
          - { arch: x86_64, crt: msvcrt }
    steps:
      - uses: actions/download-artifact@v4
        with:
          name: linux-${{matrix.crt}}-x86_64-toolchain
      - name: Unpack cross toolchain
        run: |
          tar -Jxf llvm-mingw-*.tar.xz
          rm llvm-mingw-*.tar.xz
          sudo mv llvm-mingw* /opt/llvm-mingw
          echo /opt/llvm-mingw/bin >> $GITHUB_PATH
      - uses: actions/checkout@v4
        with:
          ref: ${{github.event_name == 'workflow_dispatch' && inputs.ref || 'master'}}
      - name: Download profile
        uses: dawidd6/action-download-artifact@v10
        with:
          workflow: build.yml
          workflow_conclusion: success
          ref: ${{github.event_name == 'workflow_dispatch' && inputs.ref || 'master'}}
          event: ${{github.event_name == 'workflow_dispatch' && 'push' || 'schedule'}}
          name: profile
      - name: Cache downloads
        id: cache-tarballs
        uses: actions/cache@v4
        with:
          path: /opt/cache
          key: tarballs-${{ hashFiles('build-make.sh') }}
      - name: Restore cache
        if: steps.cache-tarballs.outputs.cache-hit != ''
        run: |
          ln -s /opt/cache/*.tar.* .
      - name: Build
        env:
          LLVM_VERSION: ${{needs.prepare.outputs.LLVM_VERSION}}
          MINGW_W64_VERSION: ${{needs.prepare.outputs.MINGW_W64_VERSION}}
          PYTHON_VERSION_MINGW: ${{needs.prepare.outputs.PYTHON_VERSION_MINGW}}
          TAG: ${{needs.prepare.outputs.TAG}}
        run: |
          sudo apt-get update && sudo apt-get install libltdl-dev swig autoconf-archive
          ./build-cross-tools.sh /opt/llvm-mingw $(pwd)/install/llvm-mingw ${{matrix.arch}} --with-python --with-busybox --thinlto --pgo
          .github/workflows/store-version.sh install/llvm-mingw/versions.txt
          ./test-libcxx-module.sh $(pwd)/install/llvm-mingw
          ./run-tests.sh $(pwd)/install/llvm-mingw
          cd install
          NAME=llvm-mingw-$TAG-${{matrix.crt}}-${{matrix.arch}}
          mv llvm-mingw $NAME
          zip -9rq ../$NAME.zip $NAME
      - name: Save cache
        if: steps.cache-tarballs.outputs.cache-hit != 'true'
        run: |
          mkdir -p /opt/cache
          for i in make-*.tar.*; do
              if [ ! -L $i ]; then cp -a $i /opt/cache; fi
          done
      - uses: actions/upload-artifact@v4
        with:
          name: windows-${{matrix.crt}}-${{matrix.arch}}-toolchain
          path: |
            llvm-mingw-*.zip
          retention-days: 7

  # Run llvm-mingw's tests on x86_64 and i686 with the cross-built corresponding
  # toolchains from above.
  test-toolchain:
    needs: [linux-cross-windows]
    runs-on: windows-latest
    defaults:
      run:
        shell: msys2 {0}
    strategy:
      fail-fast: false
      matrix:
        include:
          - { arch: i686, crt: msvcrt }
          - { arch: x86_64, crt: msvcrt }
    steps:
      - uses: msys2/setup-msys2@v2
        with:
          msystem: mingw64
          install: >-
            unzip
            make
      - uses: actions/download-artifact@v4
        with:
          name: windows-${{matrix.crt}}-${{matrix.arch}}-toolchain
      - name: Unpack toolchain
        run: |
          unzip -q llvm-mingw-*.zip
          rm llvm-mingw-*.zip
          mv llvm-mingw-* /llvm-mingw
          echo /llvm-mingw/bin >> $GITHUB_PATH
      - uses: actions/checkout@v4
        with:
          ref: ${{github.event_name == 'workflow_dispatch' && inputs.ref || 'master'}}
      - name: Run tests
        run: |
          ./run-tests.sh /llvm-mingw
          ./run-lldb-tests.sh /llvm-mingw

  upload:
    if: ${{github.event_name == 'workflow_dispatch' && inputs.upload}}
    permissions:
      contents: write
    needs: [linux-msvcrt, linux-cross-windows, test-toolchain, prepare]
    runs-on: ubuntu-latest
    steps:
      - name: Download all artifacts
        uses: actions/download-artifact@v4
      - name: Rearrange files
        run: |
          rm -rf linux-asserts*
          mv *-toolchain/*.zip *-toolchain/*.tar.xz .
      - name: Upload binaries
        env:
          GITHUB_TOKEN: ${{github.token}}
          TAG: ${{needs.prepare.outputs.TAG}}
        run: |
          gh release upload $TAG *.tar.xz *.zip --clobber -R ${{github.repository}}