add miao battery percentage thing

home/desktop/sway/__waybar.nix

@@ -22,6 +22,7 @@
         ];
         modules-right = [
           "custom/keyboard-state"
+          "custom/miao-battery-percentage"
           "tray"
           "clock"
         ];
@@ -31,6 +32,11 @@
         "sway/window" = {
           max-length = 80;
         };
+        "custom/miao-battery-percentage" = {
+          return-type = "json";
+          exec = "${lib.getExe self.packages.${pkgs.system}.miao-battery-percentage}";
+          restart-interval = "60";
+        };
         "custom/keyboard-state" = {
           return-type = "json";
           exec = "${lib.getExe self.packages.${pkgs.system}.keyboard-state}";

pkgs/default.nix

@@ -5,5 +5,6 @@
     cartograph-cf = pkgs.callPackage ./cartograph-cf {};
     keyboard-state = pkgs.callPackage ./keyboard-state {};
     audio-abtest = pkgs.callPackage ./audio-abtest {};
+    miao-battery-percentage = pkgs.callPackage ./miao-battery-percentage {};
   };
 }

pkgs/miao-battery-percentage/default.nix

@@ -0,0 +1,23 @@
+{
+  rustPlatform,
+  pkg-config,
+  udev,
+  fetchFromGitHub,
+}:
+rustPlatform.buildRustPackage rec {
+  pname = "miao-battery-percentage";
+  version = "0.1.0";
+
+  src = fetchFromGitHub {
+    owner = "xunuwu";
+    repo = "miao-battery-percentage";
+    rev = "e14e72dce9d946503676121759ce6130e42bb637";
+    hash = "sha256-NXJv8dChKPv695XMvmm+Xh0VJ1jdRhbdGMCM0LVIiD8=";
+  };
+  cargoLock.lockFile = "${src}/Cargo.lock";
+
+  nativeBuildInputs = [pkg-config];
+  buildInputs = [udev];
+
+  meta.mainProgram = "miao-battery-percentage";
+}