Add deskOS Plymouth theme package

packages/desk-os-plymouth/default.nix

@@ -0,0 +1,16 @@
+{stdenv}:
+stdenv.mkDerivation {
+  pname = "desk-os-plymouth";
+  version = "0.0.1";
+
+  src = ./src;
+
+  installPhase = ''
+    runHook preInstall
+    sed -i 's:\(^ImageDir=\)/usr:\1'"$out"':' desk-os.plymouth
+    sed -i 's:\(^ScriptFile=\)/usr:\1'"$out"':' desk-os.plymouth
+    mkdir -p $out/share/plymouth/themes/desk-os
+    cp * $out/share/plymouth/themes/desk-os
+    runHook postInstall
+  '';
+}

packages/desk-os-plymouth/src/desk-os.plymouth

@@ -0,0 +1,8 @@
+[Plymouth Theme]
+Name=deskOS
+Description=A theme that displays the deskOS logo
+ModuleName=script
+
+[script]
+ImageDir=/usr/share/plymouth/themes/desk-os
+ScriptFile=/usr/share/plymouth/themes/desk-os/desk-os.script

packages/desk-os-plymouth/src/desk-os.script

@@ -0,0 +1,8 @@
+image = Image("desk-os.png");
+
+pos_x = Window.GetWidth()/2 - image.GetWidth()/2;
+pos_y = Window.GetHeight()/2 - image.GetHeight()/2;
+
+sprite = Sprite(image);
+sprite.SetX(pos_x);
+sprite.SetY(pos_y);