rqt-{robot,common}-plugins is pulling in multiple python-qt-binding packages and failing to build

[kjeremy]

I threw the following under examples/ and did a nix-build ./ros-blah.nix:

{ pkgs ? import ../. {} }:
with pkgs;
with rosPackages.noetic;

mkShell {
  nativeBuildInputs = [
    (buildEnv {
      paths = [
        rqt-robot-plugins
      ];
    })
  ];
}

I get this error:

building
error: collision between `/nix/store/rhl1f35rrqgm6kz8yjvijdxb17x3h0fv-ros-noetic-python-qt-binding-0.4.4-r1/share/python_qt_binding/cmake/sip_configure.py' and `/nix/store/hk76klg7vwy20n2kpagmp16d3f508kp3-ros-noetic-python-qt-binding-0.4.4-r1/share/python_qt_binding/cmake/sip_configure.py'
error: builder for '/nix/store/ivdccsrwk3m9pa18mbb18v4ds62lxr21-ros-env.drv' failed with exit code 25;
       last 2 log lines:
       > building
       > error: collision between `/nix/store/rhl1f35rrqgm6kz8yjvijdxb17x3h0fv-ros-noetic-python-qt-binding-0.4.4-r1/share/python_qt_binding/cmake/sip_configure.py' and `/nix/store/hk76klg7vwy20n2kpagmp16d3f508kp3-ros-noetic-python-qt-binding-0.4.4-r1/share/python_qt_binding/cmake/sip_configure.py'
       For full logs, run 'nix log /nix/store/ivdccsrwk3m9pa18mbb18v4ds62lxr21-ros-env.drv'.
error: 1 dependencies of derivation '/nix/store/advq9q3s7hhsr4q0cib548wznsgyga11-nix-shell.drv' failed to build

The same thing occurs if you replace rqt-robot-plugins with rqt-common-plugins and enable NIXPKGS_ALLOW_INSECURE=1 for qtwebkit-5.212.0-alpha4

[hacker1024]

This is because rqt-robot-plugins includes rqt-rviz, and RViz uses a modified version of python-qt-binding.

I suggest removing rqt-rviz. You can still use it at the same time by building another environment just for it, if that helps.

{ pkgs ? import ../. {} }:
with pkgs;
with rosPackages.noetic;

mkShell {
  nativeBuildInputs = [
    (buildEnv {
      paths = [
        (rqt-robot-plugins.overrideAttrs ({ propagatedBuildInputs ? [ ], ... }: {
          propagatedBuildInputs = lib.remove rqt-rviz propagatedBuildInputs;
        }))
      ];
    })
  ];
}

[kjeremy]

This is from a much larger derivation:

rqtScript =
    let
      env = (with rosDistro; buildEnv {
        name = "configured-rqt-env";
        paths = [
          ros-environment
          rospack

          rqt-gui-bin
          # rqt-robot-plugins seems to pull in conflicting versions of python-qt5 and python-qt-binding
          # rqt-common-plugins does something similar.
          # https://github.com/lopsided98/nix-ros-overlay/issues/301
          #rqt-common-plugins
          #rqt-robot-plugins
        ] ++ extraMsgs;
      }).override ({ paths, ... }: {
        paths = paths ++ (with rosDistro.python.pkgs; [
          # many plugins require these
          pycryptodomex
          python-gnupg
          defusedxml

          # rqt-bag
          pillow
          pycairo
          cairocffi
          cffi

          # process monitor
          psutil

          # rqt-graph
          pydot

          # rqt-plot requires one of these:
          pyqtgraph
          matplotlib

          # navigation viewer
          pyopengl

          # web
          # JAK: Disable to avoid collisions with gazebo_sims. Maybe there's an alternative for this.
          # pyqt5_with_qtwebkit
        ]
        # We no longer install dev outputs by default, which means we don't get
        # propagatedBuildInputs from non-ROS packages in buildEnv.  Propagate
        # pyqt's PyQt5.sip dependency manually.
        #++ pyqt5_with_qtwebkit.propagatedBuildInputs
        );
      });

      defaultArgs = if (defaultRqtConfig == null) then [ ] else [ defaultRqtConfig ];
    in
    writeConfiguredScriptBin "configured-rqt" ''
      # Fix up the python path so rqt can find its plugins
      export PYTHONPATH="${env}/${rosDistro.python.sitePackages}''${PYTHONPATH:+:$PYTHONPATH}"

      # If no args are explicitly given, use a platform-specific config file
      if [[ $# == 0 ]]; then set -- ${lib.escapeShellArgs defaultArgs}; fi

      exec ${env}/bin/rqt "$@"
    '';

That makes it's way into a .desktop file eventually and is installer in a per-robot development environment.

[ZaneReda]

New to this whole process and working with nix. Is there a way to solve this globally? I have a ROS module being imported from a flake nixosConfiguration and I would like to just be able to use 'desktop' for simplicity sake. I am looking into overriding the package but I am unsure how this works with such a large dependency tree. Can I 'iteratively' override packages and their respective dependencies? Would this even solve the problem? Not sure if I have the domain knowledge to ask this properly so I apologize in advance. Here is my ROS.nix module:

{config, pkgs, ...}:
{

  nixpkgs.config.permittedInsecurePackages = [
    "qtwebkit-5.212.0-alpha4"
  ];
  
imports = let
    nix-ros-overlay = builtins.fetchTarball {
      url = https://github.com/lopsided98/nix-ros-overlay/archive/develop.tar.gz;
      sha256 = "sha256:06mfh4mg8bqm9kbqis4j9xfdrqy2g37lijccdhcf4h371zf2y4yx";
    };
in [ (nix-ros-overlay + "/modules/ros1/ros.nix")
     (nix-ros-overlay + "/modules/ros1/core.nix")
     (nix-ros-overlay + "/modules/ros1/nodes.nix")
     (nix-ros-overlay + "/modules/common.nix") ]; # Makes ros usable and initializes the roscore service, can check with systemctl status roscore.service


  services.ros = {
    enable = true;
    distro = "noetic";
    pkgs = pkgs.rosPackages.noetic;
    systemPackages = p: with p; [ 
    desktop # Some override here??
    ];
  };

  nix = {
    settings = {
      extra-substituters = [ "https://ros.cachix.org" ];
      extra-trusted-public-keys = [ "ros.cachix.org-1:dSyZxI8geDCJrwgvCOHDoAfOm5sV1wCPjBkKL+38Rvo=" ];
    };
  };



}