fix warning+clippy; fix wrong error message

more-wallpapers/src/error.rs

@@ -40,7 +40,7 @@ pub enum WallpaperError {
 	Dbus(#[from] rustbus::connection::Error),
 
 	#[cfg(target_os = "linux")]
-	#[error("Dbus error: {0}")]
+	#[error("failed to serialize json output: {0}")]
 	SerdeJson(#[from] serde_json::Error),
 
 	#[cfg(target_os = "linux")]

more-wallpapers/src/lib.rs

@@ -270,7 +270,7 @@ impl WallpaperBuilder {
 		P: AsRef<Utf8Path>,
 		F: FnMut(&Screen) -> (P, Mode),
 	{
-		for mut screen in self.screens.iter_mut() {
+		for screen in self.screens.iter_mut() {
 			let tuple = f(screen);
 			let path = tuple.0.as_ref();
 			let path = path.canonicalize_utf8().context(path)?;

more-wallpapers/src/linux/sway.rs

@@ -1,11 +1,7 @@
 use super::check_command_error;
-use crate::{
-	error::{CommandError, WallpaperError},
-	linux::{run, x11},
-	Mode, Screen,
-};
+use crate::{error::WallpaperError, Mode, Screen};
 use serde::Deserialize;
-use std::{io::StdoutLock, process::Command};
+use std::process::Command;
 use strum_macros::{Display, EnumString};
 
 #[derive(Debug, Clone, Copy, EnumString, Display, PartialEq, Eq)]
@@ -45,16 +41,9 @@ impl From<SMode> for Mode {
 #[derive(Deserialize, Debug)]
 struct OutputScreens {
 	name: String,
-	current_mode: OutputMode,
 	active: bool,
 }
 
-#[derive(Deserialize, Debug)]
-struct OutputMode {
-	width: usize,
-	height: usize,
-}
-
 pub(crate) fn get_screens() -> Result<Vec<Screen>, WallpaperError> {
 	let mut command = Command::new("swaymsg");
 	command.args(["-t", "get_outputs"]);