depot/third_party/nixpkgs/nixos/modules/hardware/video/uvcvideo/uvcdynctrl-udev-rules.nix

{ buildEnv
, libwebcam
, makeWrapper
, runCommand
, drivers ? []
, udevDebug ? false
}:

let
  version = "0.0.0";

  dataPath = buildEnv {
    name = "uvcdynctrl-with-drivers-data-path";
    paths = drivers ++ [ libwebcam ];
    pathsToLink = [ "/share/uvcdynctrl/data" ];
    ignoreCollisions = false;
  };

  dataDir = "${dataPath}/share/uvcdynctrl/data";
  udevDebugVarValue = if udevDebug then "1" else "0";
in

runCommand "uvcdynctrl-udev-rules-${version}"
{
  inherit dataPath;
  nativeBuildInputs = [
    makeWrapper
  ];
  buildInputs = [
    libwebcam
  ];
  dontPatchELF = true;
  dontStrip = true;
  preferLocalBuild = true;
}
''
  mkdir -p "$out/lib/udev"
  makeWrapper "${libwebcam}/lib/udev/uvcdynctrl" "$out/lib/udev/uvcdynctrl" \
    --set NIX_UVCDYNCTRL_DATA_DIR "${dataDir}" \
    --set NIX_UVCDYNCTRL_UDEV_DEBUG "${udevDebugVarValue}"

  mkdir -p "$out/lib/udev/rules.d"
  cat "${libwebcam}/lib/udev/rules.d/80-uvcdynctrl.rules" | \
    sed -r "s#RUN\+\=\"([^\"]+)\"#RUN\+\=\"$out/lib/udev/uvcdynctrl\"#g" > \
    "$out/lib/udev/rules.d/80-uvcdynctrl.rules"
''