Fix triposg: clone source at runtime (no setup.py); remove bad pip install attempt

app.py

@@ -160,18 +160,21 @@ def load_triposg():
 
     print("[load_triposg] Loading TripoSG pipeline...")
     from huggingface_hub import snapshot_download
-    weights_path = snapshot_download("VAST-AI/TripoSG")
 
-    # TripoSG ships its own pipeline — add to path
-    triposg_pkg = Path(weights_path)
-    if (triposg_pkg / "triposg").exists():
-        sys.path.insert(0, str(triposg_pkg))
-    else:
-        # Try installed package from the cloned repo (if installed with pip -e)
-        import importlib.util
-        if importlib.util.find_spec("triposg") is None:
-            import subprocess
-            subprocess.run([sys.executable, "-m", "pip", "install", "-e", str(triposg_pkg), "-q"], check=False)
+    # TripoSG source has no setup.py — clone GitHub repo and add to sys.path
+    triposg_src = Path("/tmp/triposg-src")
+    if not triposg_src.exists():
+        print("[load_triposg] Cloning TripoSG source...")
+        subprocess.run(
+            ["git", "clone", "--depth=1",
+             "https://github.com/VAST-AI-Research/TripoSG.git",
+             str(triposg_src)],
+            check=True
+        )
+    if str(triposg_src) not in sys.path:
+        sys.path.insert(0, str(triposg_src))
+
+    weights_path = snapshot_download("VAST-AI/TripoSG")
 
     from triposg.pipelines.pipeline_triposg import TripoSGPipeline
     _triposg_pipe = TripoSGPipeline.from_pretrained(
@@ -250,12 +253,6 @@ def generate_shape(input_image, remove_background, num_steps, guidance_scale,
         return None, "Please upload an image."
     try:
         progress(0.1, desc="Loading TripoSG...")
-
-        # Add TripoSG scripts to path after model download
-        from huggingface_hub import snapshot_download
-        weights_path = snapshot_download("VAST-AI/TripoSG")
-        sys.path.insert(0, weights_path)
-
         pipe, rmbg_net = load_triposg()
 
         img = Image.fromarray(input_image).convert("RGB")

requirements.txt

@@ -10,7 +10,7 @@ numpy>=2
 #     in pip>=21 isolated builds. Fix: --no-build-isolation at runtime.
 #   - nvdiffrast/diso/detectron2 require nvcc (NVIDIA CUDA compiler) which is only
 #     available in the ZeroGPU runtime container, not the Docker build stage.
-triposg @ git+https://github.com/VAST-AI-Research/TripoSG.git@fc5c40990181e2a756c4e0b1c2f4d6b5202faf8c
+# triposg has no setup.py — cloned at runtime in app.py and added to sys.path
 clip @ git+https://github.com/openai/CLIP.git@d05afc436d78f1c48dc0dbf8e5980a9d471f35f6
 # mvadapter and stablenormal use over-pinned deps (opencv-python vs headless, diffusers==0.28.0)
 # installed at runtime with --no-deps in app.py