name: Build wheels and upload to GitHub Releases

on:
  push:
    tags:
      - "v*"

jobs:
  create_releases:
    name: Create Releases
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Create Release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh release create "${{ github.ref_name }}" \
            --title "${{ github.ref_name }}" \
            --notes "## Linux x86_64

          | Flash-Attention | Python | PyTorch | CUDA |
          | --- | --- | --- | --- |
          | 2.7.4 | 3.10, 3.11, 3.12 | 2.7.1 | 12.8.1 |"

        # ## Windows x86_64

        # | Flash-Attention | Python | PyTorch | CUDA |
        # | --- | --- | --- | --- |
        # | 2.5.9, 2.6.3, 2.7.4 | 3.10, 3.11, 3.12 | 2.4.1, 2.5.1, 2.6.0, 2.7.1 | 12.4.1, 12.8.1 |"

  # #########################################################
  # Build wheels with GitHub hosted runner
  # #########################################################
  # build_wheels:
  #   name: Build wheels and Upload
  #   needs: create_releases
  #   runs-on: ubuntu-22.04
  #   env:
  #     DEBIAN_FRONTEND: noninteractive
  #     TERM: xterm-256color
  #   timeout-minutes: 1000
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       flash-attn-version: ["2.4.3", "2.5.9", "2.6.3"]
  #       python-version: ["3.10", "3.11", "3.12"]
  #       torch-version: ["2.7.1"]
  #       # # https://developer.nvidia.com/cuda-toolkit-archive
  #       cuda-version: ["12.8.1"]
  #       exclude:
  #         # torch < 2.2 does not support Python 3.12
  #         - python-version: "3.12"
  #           torch-version: "2.0.1"
  #         - python-version: "3.12"
  #           torch-version: "2.1.2"
  #         # torch 2.0.1 does not support CUDA 12.x
  #         - torch-version: "2.0.1"
  #           cuda-version: "12.1.1"
  #         - torch-version: "2.0.1"
  #           cuda-version: "12.4.1"
  #         - torch-version: "2.0.1"
  #           cuda-version: "12.6.3"
  #         - torch-version: "2.0.1"
  #           cuda-version: "12.8.1"
  #         # torch 2.7.0 does not support CUDA 12.4
  #         - torch-version: "2.7.0"
  #           cuda-version: "12.4.1"
  #   steps:
  #     - uses: actions/checkout@v4

  #     - name: Maximize build space
  #       run: |
  #         df -h
  #         echo "-----------------------------"
  #         sudo rm -rf /usr/share/dotnet
  #         sudo rm -rf /usr/local/lib/android
  #         sudo rm -rf /opt/ghc
  #         sudo rm -rf /opt/hostedtoolcache/CodeQL
  #         df -h

  #     - name: Set Swap Space
  #       uses: pierotofy/set-swap-space@master
  #       with:
  #         swap-size-gb: 48

  #     - uses: actions/setup-python@v5
  #       with:
  #         python-version: ${{ matrix.python-version }}

  #     - uses: Jimver/cuda-toolkit@master
  #       with:
  #         cuda: ${{ matrix.cuda-version }}
  #         sub-packages: '["nvcc", "toolkit"]'
  #         method: "network"
  #         use-github-cache: false
  #         use-local-cache: false

  #     - name: Install build dependencies
  #       run: |
  #         sudo apt install -y ninja-build clang
  #         pip install -U pip setuptools==75.8.0 wheel setuptools packaging psutil

  #     - name: Set environment variables
  #       run: |
  #         export PATH=/usr/local/nvidia/bin:/usr/local/nvidia/lib64:$PATH
  #         export LD_LIBRARY_PATH=/usr/local/nvidia/lib64:/usr/local/cuda/lib64:$LD_LIBRARY_PATH
  #         export MAX_JOBS=2
  #         export NVCC_THREADS=2

  #     - name: Build wheels
  #       timeout-minutes: 800
  #       run: |
  #         chmod +x build_linux.sh
  #         ./build_linux.sh ${{ matrix.flash-attn-version }} ${{ matrix.python-version }} ${{ matrix.torch-version }} ${{ matrix.cuda-version }}
  #         wheel_name=$(basename $(ls flash-attention/dist/*.whl | head -n 1))
  #         echo "wheel_name=$wheel_name" >> $GITHUB_ENV

  #     - name: Install Test
  #       run: |
  #         pip install flash-attention/dist/${{ env.wheel_name }}
  #         python -c "import flash_attn; print(flash_attn.__version__)"

  #     - name: Upload Release Asset
  #       env:
  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  #       run: |
  #         tag_name=${{ github.ref_name }}
  #         wheel_path="flash-attention/dist/${{ env.wheel_name }}"

  #         # Check if the file exists
  #         if [ ! -f "$wheel_path" ]; then
  #           echo "Error: Wheel file not found at $wheel_path"
  #           exit 1
  #         fi

  #         # Upload the release asset using GitHub CLI
  #         gh release upload "$tag_name" "$wheel_path" --clobber

  #         echo "Successfully uploaded $wheel_name to release $tag_name"

  # #########################################################
  # Build wheels with self-hosted runner
  # #########################################################
  build_wheels_self_hosted:
    name: Build wheels and Upload
    needs: create_releases
    runs-on: self-hosted
    container:
      image: ubuntu:22.04
    defaults:
      run:
        shell: bash
    env:
      DEBIAN_FRONTEND: noninteractive
      TERM: xterm-256color
    timeout-minutes: 1000
    strategy:
      fail-fast: false
      matrix:
        flash-attn-version: ["2.7.4"]
        python-version: ["3.10", "3.11", "3.12"]
        torch-version: ["2.7.1"]
        # https://developer.nvidia.com/cuda-toolkit-archive
        cuda-version: ["12.8.1"]
        exclude:
          # torch < 2.2 does not support Python 3.12
          - python-version: "3.12"
            torch-version: "2.0.1"
          - python-version: "3.12"
            torch-version: "2.1.2"
          # torch 2.0.1 does not support CUDA 12.x
          - torch-version: "2.0.1"
            cuda-version: "12.1.1"
          - torch-version: "2.0.1"
            cuda-version: "12.4.1"
          - torch-version: "2.0.1"
            cuda-version: "12.6.3"
          - torch-version: "2.0.1"
            cuda-version: "12.8.1"
          # torch 2.7.0 does not support CUDA 12.4
          - torch-version: "2.7.0"
            cuda-version: "12.4.1"
    steps:
      - name: Install tools
        shell: bash
        run: |
          apt-get update && apt-get install -y --no-install-recommends \
            curl \
            ca-certificates \
            sudo \
            software-properties-common \
            wget \
            unzip \
            zip \
            git \
            build-essential \
            gcc \
            g++ \
            clang \
            ninja-build \
            keyboard-configuration

      - name: Install gh
        shell: bash
        run: |
          sudo mkdir -p -m 755 /etc/apt/keyrings
          out=$(mktemp)
          wget -nv -O$out https://cli.github.com/packages/githubcli-archive-keyring.gpg
          cat $out | sudo tee /etc/apt/keyrings/githubcli-archive-keyring.gpg > /dev/null
          sudo chmod go+r /etc/apt/keyrings/githubcli-archive-keyring.gpg
          echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | sudo tee /etc/apt/sources.list.d/github-cli.list > /dev/null
          sudo apt update
          sudo apt install gh -y

      - uses: actions/checkout@v4

      - name: Configure Git safe directory
        shell: bash
        run: |
          git config --global --add safe.directory $(pwd)

      - uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}

      - uses: Jimver/cuda-toolkit@master
        with:
          cuda: ${{ matrix.cuda-version }}
          sub-packages: '["nvcc", "toolkit"]'
          method: "network"
          use-github-cache: false
          use-local-cache: false

      - name: Install build dependencies
        shell: bash
        run: |
          sudo apt install -y ninja-build clang
          pip install -U pip setuptools==75.8.0 wheel setuptools packaging psutil

      - name: Set environment variables
        shell: bash
        run: |
          export PATH=/usr/local/nvidia/bin:/usr/local/nvidia/lib64:$PATH
          export LD_LIBRARY_PATH=/usr/local/nvidia/lib64:/usr/local/cuda/lib64:$LD_LIBRARY_PATH
          export MAX_JOBS=2
          export NVCC_THREADS=2

      - name: Build wheels
        timeout-minutes: 800
        shell: bash
        run: |
          chmod +x build_linux.sh
          ./build_linux.sh ${{ matrix.flash-attn-version }} ${{ matrix.python-version }} ${{ matrix.torch-version }} ${{ matrix.cuda-version }}
          wheel_name=$(basename $(ls flash-attention/dist/*.whl | head -n 1))
          echo "wheel_name=$wheel_name" >> $GITHUB_ENV

      - name: Install Test
        shell: bash
        run: |
          pip install flash-attention/dist/${{ env.wheel_name }}
          python -c "import flash_attn; print(flash_attn.__version__)"

      - name: Upload Release Asset
        shell: bash
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          tag_name=${{ github.ref_name }}
          wheel_path="flash-attention/dist/${{ env.wheel_name }}"

          # Check if the file exists
          if [ ! -f "$wheel_path" ]; then
            echo "Error: Wheel file not found at $wheel_path"
            exit 1
          fi

          # Upload the release asset using GitHub CLI
          gh release upload "$tag_name" "$wheel_path" --clobber

          echo "Successfully uploaded $wheel_name to release $tag_name"

      - name: Clean up
        shell: bash
        if: always()
        run: |
          sudo rm -rf /opt/hostedtoolcache/Python/${{ matrix.python-version }}*

  # build_windows_wheels:
  #   name: Build wheels and Upload
  #   runs-on: windows-latest
  #   timeout-minutes: 1000
  #   strategy:
  #     fail-fast: false
  #     matrix:
  #       flash-attn-version: ["2.5.9", "2.6.3", "2.7.4"]
  #       python-version: ["3.10", "3.11", "3.12"]
  #       torch-version: ["2.4.1", "2.5.1", "2.6.0", "2.7.1"]
  #       # https://developer.nvidia.com/cuda-toolkit-archive
  #       # CUDA 11.8 cannot build flash-attn.
  #       # https://github.com/Dao-AILab/flash-attention/issues/595
  #       cuda-version: ["12.4.1", "12.8.1"]
  #   steps:
  #     - uses: actions/checkout@v4

  #     - name: Enable Git long paths
  #       run: git config --system core.longpaths true
  #       shell: pwsh

  #     - name: Install VS2022 BuildTools
  #       run: |
  #         choco install -y visualstudio2022buildtools `
  #           --version=117.14.1 `
  #           --params "--add Microsoft.VisualStudio.Component.VC.Tools.x86.x64"
  #       shell: pwsh

  #     - uses: actions/setup-python@v5
  #       with:
  #         python-version: ${{ matrix.python-version }}

  #     - uses: Jimver/cuda-toolkit@v0.2.24
  #       with:
  #         cuda: ${{ matrix.cuda-version }}
  #         method: "network"
  #         use-github-cache: false
  #         use-local-cache: false

  #     - name: Set CUDA and PyTorch versions
  #       run: |
  #         $cudaVersion = "${{ matrix.cuda-version }}" -replace '\.', ''
  #         $cudaVersion = $cudaVersion.Substring(0, [Math]::Min(3, $cudaVersion.Length))
  #         echo "MATRIX_CUDA_VERSION=$cudaVersion" >> $env:GITHUB_ENV
  #         $torchVersion = "${{ matrix.torch-version }}" -replace '^(\d+\.\d+).*', '$1'
  #         echo "MATRIX_TORCH_VERSION=$torchVersion" >> $env:GITHUB_ENV
  #       shell: pwsh

  #     - name: Install build dependencies
  #       run: |
  #         pip install -U pip setuptools==75.8.0 wheel setuptools packaging psutil ninja
  #       shell: pwsh

  #     - name: Install PyTorch ${{ matrix.torch-version }}+cu${{ matrix.cuda-version }}
  #       run: |
  #         $env:TORCH_CUDA_VERSION = python -c "from os import environ as env; support_cuda_versions = { '2.1': [121], '2.2': [121], '2.3': [121], '2.4': [121, 124], '2.5': [121, 124], '2.6': [124, 126], '2.7': [126, 128], '2.8': [128], }; target_cuda_versions = support_cuda_versions[env['MATRIX_TORCH_VERSION']]; cuda_version = int(env['MATRIX_CUDA_VERSION']); closest_version = min(target_cuda_versions, key=lambda x: abs(x - cuda_version)); print(closest_version)"

  #         if ("${{ matrix.torch-version }}" -like "*dev*") {
  #           pip install --pre torch==${{ matrix.torch-version }} --index-url https://download.pytorch.org/whl/nightly/cu$env:TORCH_CUDA_VERSION
  #         } else {
  #           pip install --no-cache-dir torch==${{ matrix.torch-version }} --index-url https://download.pytorch.org/whl/cu$env:TORCH_CUDA_VERSION
  #         }

  #         nvcc --version
  #         python -V
  #         python -c "import torch; print('PyTorch:', torch.__version__)"
  #         python -c "import torch; print('CUDA:', torch.version.cuda)"
  #         python -c "from torch.utils import cpp_extension; print(cpp_extension.CUDA_HOME)"
  #       shell: pwsh

  #     - name: Checkout flash-attn
  #       run: |
  #         git clone https://github.com/Dao-AILab/flash-attention.git -b "v${{ matrix.flash-attn-version }}"
  #       shell: pwsh

  #     - name: Build wheels
  #       timeout-minutes: 800
  #       run: |
  #         Import-Module 'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\Tools\Microsoft.VisualStudio.DevShell.dll'
  #         Enter-VsDevShell -VsInstallPath 'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools' -DevCmdArguments '-arch=x64 -host_arch=x64'
  #         $env:DISTUTILS_USE_SDK = 1
  #         $env:BUILD_TARGET = "cuda"

  #         $env:MAX_JOBS = "2"
  #         $env:NVCC_THREADS = "2"
  #         $env:FLASH_ATTENTION_FORCE_BUILD = "TRUE"

  #         cd flash-attention
  #         python setup.py bdist_wheel --dist-dir=dist
  #         $baseWheelName = Get-ChildItem -Path "dist\*.whl" | Select-Object -First 1 | ForEach-Object { $_.Name }
  #         $wheelName = $baseWheelName.Replace("${{ matrix.flash-attn-version }}", "${{ matrix.flash-attn-version }}+cu$env:MATRIX_CUDA_VERSION" + "torch$env:MATRIX_TORCH_VERSION")
  #         Move-Item "dist\$baseWheelName" "dist\$wheelName"
  #         echo "wheel_name=$wheelName" >> $env:GITHUB_ENV
  #       shell: pwsh

  #     - name: Install Test
  #       run: |
  #         pip install flash-attention/dist/$env:wheel_name
  #         python -c "import flash_attn; print(flash_attn.__version__)"
  #       shell: pwsh

  #     - name: Upload Release Asset
  #       env:
  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  #       run: |
  #         $tag_name = "${env:GITHUB_REF}".Replace("refs/tags/", "")
  #         $wheel_path = "flash-attention/dist/$env:wheel_name"

  #         # Check if the file exists
  #         if (-not (Test-Path $wheel_path)) {
  #           Write-Host "Error: Wheel file not found at $wheel_path"
  #           exit 1
  #         }

  #         # Upload the release asset using GitHub CLI
  #         gh release upload "$tag_name" "$wheel_path" --clobber

  #         Write-Host "Successfully uploaded $env:wheel_name to release $tag_name"
  #       shell: pwsh