PKGBUILD patch to make monado search $XRT_DATA_DIR for Mercury Hand Tracking ONNX files.

pkgbuild.handtracking.patch

5c5
< pkgver=25.0.0.r227.g0d513229f
---
> pkgver=25.1.0.r412.gc32301dd1
37a38,56
>    msg2 "Patching Mercury hand tracking to respect XRT_DATA_DIR..."
>
>     # 1. Inject the path resolution helper function at the very top of the file
>     sed -i '1i \
> #include <cstdlib>\n\
> #include <string>\n\
> static std::string get_mercury_model_path(const char* filename) {\n\
>     const char* data_dir = std::getenv("XRT_DATA_DIR");\n\
>     if (data_dir) {\n\
>         /* Look in the data dir first. Assuming files are directly inside it based on your install script. */\n\
>         return std::string(data_dir) + "/" + filename;\n\
>     }\n\
>     /* Fallback to current working directory */\n\
>     return std::string(filename);\n\
> }' src/xrt/tracking/hand/mercury/hg_model.cpp
>
>     # 2. Replace the hardcoded string literals with the function call
>     sed -i 's|"grayscale_detection_160x160.onnx"|get_mercury_model_path("grayscale_detection_160x160.onnx").c_str()|g' src/xrt/tracking/hand/mercury/hg_model.cpp
>     sed -i 's|"grayscale_keypoint_jan18.onnx"|get_mercury_model_path("grayscale_keypoint_jan18.onnx").c_str()|g' src/xrt/tracking/hand/mercury/hg_model.cpp