uhd: cleanup deps & add many enable / disable flags

pkgs/applications/radio/uhd/default.nix

@@ -3,9 +3,32 @@
 , fetchFromGitHub
 , cmake
 , pkgconfig
-, python
-, libusb1
+# See https://files.ettus.com/manual_archive/v3.15.0.0/html/page_build_guide.html for dependencies explanations
 , boost
+, enableLibuhd_C_api ? true
+# requires numpy
+, enableLibuhd_Python_api ? false
+, python ? null
+, enableExamples ? false
+, enableUtils ? false
+, enableLiberio ? false
+, liberio ? null
+, libusb1 ? null
+, enableDpdk ? false
+, dpdk ? null
+# Devices
+, enableOctoClock ? true
+, enableMpmd ? true
+, enableB100 ? true
+, enableB200 ? true
+, enableUsrp1 ? true
+, enableUsrp2 ? true
+, enableX300 ? true
+, enableN230 ? true
+, enableN300 ? true
+, enableN320 ? true
+, enableE300 ? true
+, enableE320 ? true
 }:
 
 # You need these udev rules to not have to run as root (copied from
@@ -14,6 +37,11 @@
 #   SUBSYSTEMS=="usb", ATTRS{idVendor}=="fffe", ATTRS{idProduct}=="0002", MODE:="0666"
 #   SUBSYSTEMS=="usb", ATTRS{idVendor}=="2500", ATTRS{idProduct}=="0002", MODE:="0666"
 
+let
+  onOffBool = b: if b then "ON" else "OFF";
+  inherit (stdenv.lib) optionals;
+in
+
 stdenv.mkDerivation rec {
   pname = "uhd";
   # UHD seems to use three different version number styles: x.y.z, xxx_yyy_zzz
@@ -35,6 +63,28 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   cmakeFlags = [
+    "-DENABLE_LIBUHD=ON"
+    "-DENABLE_USB=ON"
+    "-DENABLE_TESTS=ON" # This installs tests as well so we delete them via postPhases
+    "-DENABLE_EXAMPLES=${onOffBool enableExamples}"
+    "-DENABLE_UTILS=${onOffBool enableUtils}"
+    "-DENABLE_LIBUHD_C_API=${onOffBool enableLibuhd_C_api}"
+    "-DENABLE_LIBUHD_PYTHON_API=${onOffBool enableLibuhd_Python_api}"
+    "-DENABLE_LIBERIO=${onOffBool enableLiberio}"
+    "-DENABLE_DPDK=${onOffBool enableDpdk}"
+    # Devices
+    "-DENABLE_OCTOCLOCK=${onOffBool enableOctoClock}"
+    "-DENABLE_MPMD=${onOffBool enableMpmd}"
+    "-DENABLE_B100=${onOffBool enableB100}"
+    "-DENABLE_B200=${onOffBool enableB200}"
+    "-DENABLE_USRP1=${onOffBool enableUsrp1}"
+    "-DENABLE_USRP2=${onOffBool enableUsrp2}"
+    "-DENABLE_X300=${onOffBool enableX300}"
+    "-DENABLE_N230=${onOffBool enableN230}"
+    "-DENABLE_N300=${onOffBool enableN300}"
+    "-DENABLE_N320=${onOffBool enableN320}"
+    "-DENABLE_E300=${onOffBool enableE300}"
+    "-DENABLE_E320=${onOffBool enableE320}"
   ]
     # TODO: Check if this still needed
     # ABI differences GCC 7.1
@@ -42,16 +92,34 @@ stdenv.mkDerivation rec {
     ++ [ (stdenv.lib.optionalString stdenv.isAarch32 "-DCMAKE_CXX_FLAGS=-Wno-psabi") ]
   ;
 
+  # Python + Mako are always required for the build itself but not necessary for runtime.
+  pythonEnv = python.withPackages (ps: with ps; [ Mako ]
+    ++ optionals (enableLibuhd_Python_api) [ numpy setuptools ]
+    ++ optionals (enableUtils) [ requests six ]
+  );
+
   nativeBuildInputs = [
     cmake
     pkgconfig
-    # Python + Mako are always required for the build itself but not necessary for runtime
-    (python.withPackages (ps: with ps; [ Mako ]))
-  ];
+  ]
+    # If both enableLibuhd_Python_api and enableUtils are off, we don't need
+    # pythonEnv in buildInputs as it's a 'build' dependency and not a runtime
+    # dependency
+    ++ optionals (!enableLibuhd_Python_api && !enableUtils) [ pythonEnv ]
+  ;
   buildInputs = [
-    libusb1
     boost
-  ];
+    libusb1
+  ]
+    # However, if enableLibuhd_Python_api *or* enableUtils is on, we need
+    # pythonEnv for runtime as well. The utilities' runtime dependencies are
+    # handled at the environment
+    ++ optionals (enableLibuhd_Python_api || enableUtils) [ pythonEnv ]
+    ++ optionals (enableLiberio) [ liberio ]
+    ++ optionals (enableDpdk) [ dpdk ]
+  ;
+
+  doCheck = true;
 
   # Build only the host software
   preConfigure = "cd host";
@@ -59,7 +127,7 @@ stdenv.mkDerivation rec {
   # https://files.ettus.com/manual_archive/v3.15.0.0/html/page_build_guide.html#build_instructions_unix_arm
   patches = if stdenv.isAarch32 then ./neon.patch else null;
 
-  postPhases = [ "installFirmware" ];
+  postPhases = [ "installFirmware" "removeInstalledTests" ];
 
   # UHD expects images in `$CMAKE_INSTALL_PREFIX/share/uhd/images`
   installFirmware = ''
@@ -67,6 +135,11 @@ stdenv.mkDerivation rec {
     tar --strip-components=1 -xvf "${uhdImagesSrc}" -C "$out/share/uhd/images"
   '';
 
+  # -DENABLE_TESTS=ON installs the tests, we don't need them in the output
+  removeInstalledTests = ''
+    rm -r $out/lib/uhd/tests
+  '';
+
   meta = with stdenv.lib; {
     description = "USRP Hardware Driver (for Software Defined Radio)";
     longDescription = ''