flake.nix

@@ -20,9 +20,6 @@
         name = cargoToml.package.name;
 
         dlDeps = with pkgs; [
-          # libdbus, for rfd
-          dbus
-
           # needed for both x11 and wayland
           libxkbcommon
           libGL
@@ -80,13 +77,19 @@
             // {
               inherit cargoArtifacts;
 
-              nativeBuildInputs = commonArgs.nativeBuildInputs ++ [
+              nativeBuildInputs =
+                commonArgs.nativeBuildInputs
+                ++ [
                   pkgs.autoPatchelfHook
-              ];
+                ]
+                ++ lib.optional pkgs.stdenv.hostPlatform.isLinux pkgs.makeBinaryWrapper;
 
-              buildInputs = commonArgs.buildInputs ++ [
+              buildInputs =
+                commonArgs.buildInputs
+                ++ [
                   pkgs.libgcc
-              ];
+                ]
+                ++ lib.optional pkgs.stdenv.hostPlatform.isLinux pkgs.zenity;
 
               runtimeDependencies = dlDeps;
 
@@ -95,6 +98,10 @@
               postFixup = ''
                 mkdir -p "$out/share/applications"
                 ln -s "${desktopItem}"/share/applications/* "$out/share/applications/"
+              ''
+              + lib.optionalString pkgs.stdenv.hostPlatform.isLinux /* sh */ ''
+                wrapProgram $out/bin/${name} \
+                  --prefix PATH : ${lib.makeBinPath [ pkgs.zenity ]}
               '';
             }
           );

src/utils.rs

@@ -1,20 +1,48 @@
 use std::path::{Path, PathBuf};
 
 use iced::widget;
-use image::{DynamicImage, ImageDecoder, ImageReader, ImageResult, RgbaImage};
+use image::{DynamicImage, ImageDecoder, ImageReader, RgbaImage};
 use rfd::FileDialog;
 
 pub fn load_image(path: impl AsRef<Path>) -> Result<RgbaImage, String> {
-    _load_image(path).map_err(|e| e.to_string())
+    let path = path.as_ref();
+
+    let image_reader = match ImageReader::open(path).and_then(|r| r.with_guessed_format()) {
+        Ok(r) => r,
+        Err(e) => {
+            return Err(format!(
+                "failed to create image reader for '{}': {e}",
+                path.display()
+            ));
         }
-fn _load_image(path: impl AsRef<Path>) -> ImageResult<RgbaImage> {
+    };
-    let mut decoder = ImageReader::open(path)?
-        .with_guessed_format()?
-        .into_decoder()?;
 
-    let oreintation = decoder.orientation()?;
+    let mut decoder = match image_reader.into_decoder() {
+        Ok(d) => d,
+        Err(e) => {
+            return Err(format!(
+                "failed to create decoder for '{}': {e}",
+                path.display()
+            ));
+        }
+    };
 
-    let mut decoded_image = DynamicImage::from_decoder(decoder)?;
+    let oreintation = match decoder.orientation() {
+        Ok(o) => o,
+        Err(e) => {
+            return Err(format!(
+                "failed to get oreintation of '{}': {e}",
+                path.display()
+            ));
+        }
+    };
+
+    let mut decoded_image = match DynamicImage::from_decoder(decoder) {
+        Ok(i) => i,
+        Err(e) => {
+            return Err(format!("failed to decode image '{}': {e}", path.display()));
+        }
+    };
 
     decoded_image.apply_orientation(oreintation);
 
@@ -47,7 +75,7 @@ pub fn save_image(image: Option<&RgbaImage>) -> Result<(), String> {
     };
 
     if let Err(e) = image.save(&path) {
-        return Err(e.to_string());
+        return Err(format!("failed to save '{}': {e}", path.display()));
     };
 
     Ok(())