name: Build wheels and upload to GitHub Releases

on:
  push:
    tags:
      - "v*"

jobs:
  create_releases:
    name: Create Releases
    runs-on: ubuntu-latest
    steps:
      - name: Get the tag version
        id: extract_branch
        run: echo "branch=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
        shell: bash
      - name: Create Release
        id: create_release
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ steps.extract_branch.outputs.branch }}
          release_name: ${{ steps.extract_branch.outputs.branch }}
          body: |
            ## Windows x86_64

            | Flash-Attention | Python | PyTorch | CUDA |
            | --- | --- | --- | --- |
            | 2.6.3 | 3.11 | 2.6.0 | 12.6.3 |

  # #########################################################
  # 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: ["2.8.0.dev20250523"]
  #       # # https://developer.nvidia.com/cuda-toolkit-archive
  #       # cuda-version: ["12.8.1"]
  #       flash-attn-version: []
  #       python-version: []
  #       torch-version: []
  #       # https://developer.nvidia.com/cuda-toolkit-archive
  #       cuda-version: []
  #       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 }}
  #         linux-local-args: '["--toolkit"]'
  #         method: "network"

  #     - name: Set CUDA and PyTorch versions
  #       run: |
  #         echo "MATRIX_CUDA_VERSION=$(echo ${{ matrix.cuda-version }} | awk -F \. {'print $1 $2'})" >> $GITHUB_ENV
  #         echo "MATRIX_TORCH_VERSION=$(echo ${{ matrix.torch-version }} | awk -F \. {'print $1 "." $2'})" >> $GITHUB_ENV

  #     - 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: Install PyTorch ${{ matrix.torch-version }}+cu${{ matrix.cuda-version }}
  #       run: |
  #         export TORCH_CUDA_VERSION=$(python -c "from os import environ as env; \
  #             support_cuda_versions = { \
  #                 '2.0': [117, 118], \
  #                 '2.1': [118, 121], \
  #                 '2.2': [118, 121], \
  #                 '2.3': [118, 121], \
  #                 '2.4': [118, 121, 124], \
  #                 '2.5': [118, 121, 124], \
  #                 '2.6': [118, 124, 126], \
  #                 '2.7': [118, 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 [[ ${{ matrix.torch-version }} == *"dev"* ]]; then
  #           pip install --pre torch==${{ matrix.torch-version }} --index-url https://download.pytorch.org/whl/nightly/cu${TORCH_CUDA_VERSION}
  #         else
  #           pip install --no-cache-dir torch==${{ matrix.torch-version }} --index-url https://download.pytorch.org/whl/cu${TORCH_CUDA_VERSION}
  #         fi

  #         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)"

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

  #     - name: Build wheels
  #       timeout-minutes: 800
  #       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
  #         export FLASH_ATTENTION_FORCE_BUILD=TRUE

  #         cd flash-attention
  #         python setup.py bdist_wheel --dist-dir=dist
  #         base_wheel_name=$(basename $(ls dist/*.whl | head -n 1))
  #         wheel_name=$(echo $base_wheel_name | sed "s/${{ matrix.flash-attn-version }}/${{ matrix.flash-attn-version }}+cu${{ env.MATRIX_CUDA_VERSION }}torch${{ env.MATRIX_TORCH_VERSION }}/")
  #         mv dist/$base_wheel_name dist/$wheel_name
  #         echo "wheel_name=$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: Get the tag version
  #       id: extract_branch
  #       run: echo "branch=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT

  #     - name: Get Release with Tag
  #       id: get_release
  #       uses: joutvhu/get-release@v1
  #       env:
  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  #       with:
  #         tag_name: ${{ steps.extract_branch.outputs.branch }}

  #     - name: Upload Release Asset
  #       uses: actions/upload-release-asset@v1
  #       env:
  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  #       with:
  #         upload_url: ${{ steps.get_release.outputs.upload_url }}
  #         asset_path: flash-attention/dist/${{ env.wheel_name }}
  #         asset_name: ${{ env.wheel_name }}
  #         asset_content_type: application/*

  # # #########################################################
  # # 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: ["2.8.0.dev20250523"]
  #       # https://developer.nvidia.com/cuda-toolkit-archive
  #       # cuda-version: ["12.8.1"]
  #       flash-attn-version: []
  #       python-version: []
  #       torch-version: []
  #       cuda-version: []
  #       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
  #       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

  #     - uses: actions/checkout@v4

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

  #     - uses: Jimver/cuda-toolkit@master
  #       env:
  #         DEBIAN_FRONTEND: noninteractive
  #       with:
  #         cuda: ${{ matrix.cuda-version }}
  #         linux-local-args: '["--toolkit"]'
  #         method: "network"

  #     - name: Set CUDA and PyTorch versions
  #       run: |
  #         echo "MATRIX_CUDA_VERSION=$(echo ${{ matrix.cuda-version }} | awk -F \. {'print $1 $2'})" >> $GITHUB_ENV
  #         echo "MATRIX_TORCH_VERSION=$(echo ${{ matrix.torch-version }} | awk -F \. {'print $1 "." $2'})" >> $GITHUB_ENV
  #       shell: bash

  #     - 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: Install PyTorch ${{ matrix.torch-version }}+cu${{ matrix.cuda-version }}
  #       shell: bash
  #       run: |
  #         export TORCH_CUDA_VERSION=$(python -c "from os import environ as env; \
  #             support_cuda_versions = { \
  #                 '2.0': [117, 118], \
  #                 '2.1': [118, 121], \
  #                 '2.2': [118, 121], \
  #                 '2.3': [118, 121], \
  #                 '2.4': [118, 121, 124], \
  #                 '2.5': [118, 121, 124], \
  #                 '2.6': [118, 124, 126], \
  #                 '2.7': [118, 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 [[ ${{ matrix.torch-version }} == *"dev"* ]]; then
  #           pip install --pre --force-reinstall --no-cache-dir torch==${{ matrix.torch-version }} --index-url https://download.pytorch.org/whl/nightly/cu${TORCH_CUDA_VERSION}
  #         else
  #           pip install --force-reinstall --no-cache-dir torch==${{ matrix.torch-version }} --index-url https://download.pytorch.org/whl/cu${TORCH_CUDA_VERSION}
  #         fi

  #         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)"

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

  #     - name: Build wheels
  #       timeout-minutes: 800
  #       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=4
  #         export FLASH_ATTENTION_FORCE_BUILD=TRUE

  #         cd flash-attention
  #         python setup.py bdist_wheel --dist-dir=dist
  #         base_wheel_name=$(basename $(ls dist/*.whl | head -n 1))
  #         wheel_name=$(echo $base_wheel_name | sed "s/${{ matrix.flash-attn-version }}/${{ matrix.flash-attn-version }}+cu${{ env.MATRIX_CUDA_VERSION }}torch${{ env.MATRIX_TORCH_VERSION }}/")
  #         mv dist/$base_wheel_name dist/$wheel_name
  #         echo "wheel_name=$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: Get the tag version
  #       id: extract_branch
  #       shell: bash
  #       run: echo "branch=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT

  #     - name: Get Release with Tag
  #       id: get_release
  #       uses: joutvhu/get-release@v1
  #       env:
  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  #       with:
  #         tag_name: ${{ steps.extract_branch.outputs.branch }}

  #     - name: Upload Release Asset
  #       uses: actions/upload-release-asset@v1
  #       env:
  #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  #       with:
  #         upload_url: ${{ steps.get_release.outputs.upload_url }}
  #         asset_path: flash-attention/dist/${{ env.wheel_name }}
  #         asset_name: ${{ env.wheel_name }}
  #         asset_content_type: application/*

  #     - name: Clean up
  #       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: ["2.6.3"]
        python-version: ["3.11"]
        torch-version: ["2.6.0"]
        # https://developer.nvidia.com/cuda-toolkit-archive
        cuda-version: ["12.6.3"]
        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: Enable Git long paths
        run: git config --system core.longpaths true
        shell: pwsh

      - name: Install VS2022 BuildTools 17.9.7
        run: choco install -y visualstudio2022buildtools --version=117.9.7.0 --params "--add Microsoft.VisualStudio.Component.VC.Tools.x86.x64 --installChannelUri https://aka.ms/vs/17/release/180911598_-255012421/channel"
        shell: pwsh

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

      - uses: Jimver/cuda-toolkit@master
        with:
          cuda: ${{ matrix.cuda-version }}
          method: "network"

      - 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 = { '2.0': [117, 118], '2.1': [118, 121], '2.2': [118, 121], '2.3': [118, 121], '2.4': [118, 121, 124], '2.5': [118, 121, 124], '2.6': [118, 124, 126], '2.7': [118, 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: Get the tag version
        id: extract_branch
        shell: bash
        run: echo "branch=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT

      - name: Get Release with Tag
        id: get_release
        uses: joutvhu/get-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ steps.extract_branch.outputs.branch }}

      - name: Upload Release Asset
        uses: actions/upload-release-asset@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          upload_url: ${{ steps.get_release.outputs.upload_url }}
          asset_path: flash-attention/dist/${{ env.wheel_name }}
          asset_name: ${{ env.wheel_name }}
          asset_content_type: application/*