Update lightx2v_kernel (#458)

lightx2v_kernel/CMakeLists.txt

@@ -26,16 +26,7 @@ if(CUTLASS_PATH)
     set(repo-cutlass_SOURCE_DIR ${CUTLASS_PATH})
     message(STATUS "Using local CUTLASS from: ${CUTLASS_PATH}")
 else()
-    message(STATUS "Start to git clone CUTLASS from GitHub...")
-    include(FetchContent)
-    FetchContent_Declare(
-        repo-cutlass
-        GIT_REPOSITORY https://github.com/NVIDIA/cutlass
-        GIT_TAG        b995f933179c22d3fe0d871c3a53d11e4681950f
-        GIT_SHALLOW    OFF
-    )
-    FetchContent_MakeAvailable(repo-cutlass)
-    message(STATUS "Using CUTLASS from ${repo-cutlass_SOURCE_DIR}")
+    message(FATAL_ERROR "CUTLASS_PATH is not set. Please manually download CUTLASS first.")
 endif()
 
 

lightx2v_kernel/README.md

@@ -8,17 +8,16 @@ pip install scikit_build_core uv
 ```
 
 ### Build whl
-```
-MAX_JOBS=$(nproc) && CMAKE_BUILD_PARALLEL_LEVEL=$(nproc) \
-uv build --wheel \
-    -Cbuild-dir=build . \
-    --verbose \
-    --color=always \
-    --no-build-isolation
-```
 
-During the above build process, the cutlass source code will be downloaded automatically. If you have already downloaded the source code, you can specify the local cutlass path:
 ```
+git clone https://github.com/NVIDIA/cutlass.git
+
+git clone https://github.com/ModelTC/LightX2V.git
+
+cd LightX2V/lightx2v_kernel
+
+# Set the /path/to/cutlass below to the absolute path of cutlass you download.
+
 MAX_JOBS=$(nproc) && CMAKE_BUILD_PARALLEL_LEVEL=$(nproc) \
 uv build --wheel \
     -Cbuild-dir=build . \