Use runtime install with --no-build-isolation (fix for ZeroGPU build)

app.py

@@ -112,9 +112,17 @@ except ImportError:
     # (Optional) side-step allocator+NVML quirks in restrictive containers
     env.setdefault("PYTORCH_NO_CUDA_MEMORY_CACHING", "1")
 
-# FIX: Use pre-built wheel from requirements.txt to avoid build errors
-# subprocess.check_call([sys.executable, "-m", "pip", "install", "git+https://github.com/graphdeco-inria/diff-gaussian-rasterization"], env=env)
-import diff_gaussian_rasterization  # noqa: F401
+# FIX: Install from source with --no-build-isolation to use existing torch
+    try:
+        import diff_gaussian_rasterization
+    except ImportError:
+        print("Installing diff-gaussian-rasterization...")
+        subprocess.check_call(
+            [sys.executable, "-m", "pip", "install", "--no-build-isolation",
+             "git+https://github.com/graphdeco-inria/diff-gaussian-rasterization"],
+            env=env,
+        )
+    import diff_gaussian_rasterization  # noqa: F401
 
 
 from gslrm.model.gaussians_renderer import render_turntable, imageseq2video

requirements.txt

@@ -26,4 +26,4 @@ pytorch-msssim==1.0.0
 ffmpeg-python==0.2.0
 tqdm
 spaces
-https://huggingface.co/camenduru/gaussian-splatting/resolve/main/diff_gaussian_rasterization-0.0.0-cp310-cp310-linux_x86_64.whl
+