Two dependencies get installed and used here:

- cmake, 3.21

- Darknet, recent master tip

---

= cmake 3.21, needed to build the latest version of darknet.

Gets installed from a custom repository provided by Kitware, the developers of cmake.

RUN sudo apt update \

&& sudo apt install -y gpg wget \

&& wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | gpg --dearmor - | sudo tee /usr/share/keyrings/kitware-archive-keyring.gpg >/dev/null \

&& echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ bionic main' | sudo tee /etc/apt/sources.list.d/kitware.list >/dev/null \

&& sudo apt-get update \

&& sudo rm /usr/share/keyrings/kitware-archive-keyring.gpg \

&& sudo apt-get install -y kitware-archive-keyring \

&& sudo apt-get install -y cmake \

&& apt clean

---

Darknet, latest version

Installed and built from source, from the official repository.

RUN git clone https://github.com/AlexeyAB/darknet.git \

&& cd darknet \

&& git checkout 9ff8653d999c8a22bc8f1ff4f4a8a3cc5b63d255 \

&& mkdir -p build_release && cd build_release \

&& cmake .. \

&& cmake --build . --target install -- -j$(expr `nproc` - 4)