push sheeet

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

@@ -0,0 +1,47 @@
+{
+  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"
+  ''