The Asset-Importer-Lib Viewer repository.
First, you have to check out the code
git clone --recursive https://github.com/assimp/assimp_view.git
Now change into the repo folder and start the build:
cd assimp_view
cmake .\CMakeLists.txt --preset=default
cmake --build .
To run the app go to the bin folder and run it
cd bin/
./assimp_view
cd bin\debug
.\assimp_view.exe