Test github workflow for standalone build with cu118 torch+xformers.

.ci/update_windows_cu118/update_comfyui_and_python_dependencies.bat

+..\python_embeded\python.exe .\update.py ..\ComfyUI\
+..\python_embeded\python.exe -s -m pip install --upgrade torch torchvision torchaudio --extra-index-url https://download.pytorch.org/whl/cu118 xformers -r ../ComfyUI/requirements.txt pygit2
+pause

.ci/windows_base_files/README_VERY_IMPORTANT.txt

@@ -22,6 +22,6 @@ To update the ComfyUI code: update\update_comfyui.bat
 
 
 
-To update ComfyUI with the python dependencies:
+To update ComfyUI with the python dependencies, note that you should ONLY run this if you have issues with python dependencies.
 update\update_comfyui_and_python_dependencies.bat
 

.github/workflows/windows_release_cu118.yml

@@ -7,17 +7,94 @@ on:
 #      - master
 
 jobs:
-  build:
+  build_dependencies:
+    env:
+        # you need at least cuda 5.0 for some of the stuff compiled here.
+        TORCH_CUDA_ARCH_LIST: "5.0+PTX 6.0 6.1 7.0 7.5 8.0 8.6 8.9"
+        FORCE_CUDA: 1
+        MAX_JOBS: 1 # will crash otherwise
+        DISTUTILS_USE_SDK: 1 # otherwise distutils will complain on windows about multiple versions of msvc
+        XFORMERS_BUILD_TYPE: "Release"
+    runs-on: windows-latest
+    steps:
+        - name: Cache Built Dependencies
+          uses: actions/cache@v3
+          id: cache-cu118_python_stuff
+          with:
+            path: cu118_python_deps.tar
+            key: ${{ runner.os }}-build-cu118
+
+        - if: ${{ steps.cache-cu118_python_stuff.cache-hit != 'true' }}
+          uses: actions/checkout@v3
+
+        - if: ${{ steps.cache-cu118_python_stuff.cache-hit != 'true' }}
+          uses: actions/setup-python@v4
+          with:
+            python-version: '3.10.9'
+
+        - if: ${{ steps.cache-cu118_python_stuff.cache-hit != 'true' }}
+          uses: comfyanonymous/cuda-toolkit@test
+          id: cuda-toolkit
+          with:
+            cuda: '11.8.0'
+        # copied from xformers github
+        - name: Setup MSVC
+          uses: ilammy/msvc-dev-cmd@v1
+        - name: Configure Pagefile
+          # windows runners will OOM with many CUDA architectures
+          # we cheat here with a page file
+          uses: al-cheb/configure-pagefile-action@v1.3
+          with:
+            minimum-size: 2GB
+        # really unfortunate: https://github.com/ilammy/msvc-dev-cmd#name-conflicts-with-shell-bash
+        - name: Remove link.exe
+          shell: bash
+          run: rm /usr/bin/link
+
+        - if: ${{ steps.cache-cu118_python_stuff.cache-hit != 'true' }}
+          shell: bash
+          run: |
+            python -m pip wheel --no-cache-dir torch torchvision torchaudio --extra-index-url https://download.pytorch.org/whl/cu118 -r requirements.txt pygit2 -w ./temp_wheel_dir
+            python -m pip install --no-cache-dir ./temp_wheel_dir/*
+            echo installed basic
+            git clone --recurse-submodules https://github.com/facebookresearch/xformers.git
+            cd xformers
+            python -m pip install --no-cache-dir wheel setuptools twine
+            echo building xformers
+            python setup.py bdist_wheel -d ../temp_wheel_dir/
+            cd ..
+            rm -rf xformers
+            ls -lah temp_wheel_dir
+            mv temp_wheel_dir cu118_python_deps
+            tar cf cu118_python_deps.tar cu118_python_deps
+        - uses: actions/upload-artifact@v3
+          with:
+            name: cu118_python_deps
+            path: cu118_python_deps.tar
+
+
+  package_comfyui:
+    needs: build_dependencies
     permissions:
         contents: "write"
         packages: "write"
         pull-requests: "read"
     runs-on: windows-latest
     steps:
+        - uses: actions/download-artifact@v3
+          with:
+            name: cu118_python_deps
+        - shell: bash
+          run: |
+            mv cu118_python_deps.tar ../
+            cd ..
+            tar xf cu118_python_deps.tar
+            pwd
+            ls
+
         - uses: actions/checkout@v3
           with:
             fetch-depth: 0
-
         - shell: bash
           run: |
             cd ..
@@ -28,7 +105,7 @@ jobs:
             echo 'import site' >> ./python310._pth
             curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
             ./python.exe get-pip.py
-            ./python.exe -s -m pip install torch torchvision torchaudio --extra-index-url https://download.pytorch.org/whl/cu118 xformers -r ../ComfyUI/requirements.txt pygit2
+            ./python.exe -s -m pip install ../cu118_python_deps/*
             sed -i '1i../ComfyUI' ./python310._pth
             cd ..
 
@@ -41,6 +118,7 @@ jobs:
 
             mkdir update
             cp -r ComfyUI/.ci/update_windows/* ./update/
+            cp -r ComfyUI/.ci/update_windows_cu118/* ./update/
             cp -r ComfyUI/.ci/windows_base_files/* ./
 
             cd ..