Improvements to error handling

- Add `log` dependency.
- Remove `anyhow` dependency in favor of standard `Result`.
- Handle `unwrap()` calls and report errors with `log::error!`.

Cargo.toml

@@ -11,7 +11,7 @@ build = "build.rs"
 
 [dependencies]
 futures = "0.3.30"
-anyhow = "1.0.79"
+log = "0.4.22"
 
 [dev-dependencies]
 tokio = { version = "1.23.0", features = ["full"] }

examples/notify.rs

@@ -1,7 +1,9 @@
+use std::error::Error;
+
 use futures::StreamExt;
 
 #[tokio::main]
-async fn main() -> anyhow::Result<()> {
+async fn main() -> Result<(), Box<dyn Error>> {
     let mut stream = dark_light::subscribe().await?;
     while let Some(mode) = stream.next().await {
         println!("System theme changed: {:?}", mode);

src/platforms/freedesktop/detect.rs

@@ -1,6 +1,5 @@
-use super::initial_value;
 use crate::Mode;
 
 pub fn detect() -> Mode {
-    pollster::block_on(initial_value())
+    pollster::block_on(super::get_color_scheme())
 }

src/platforms/freedesktop/mod.rs

@@ -16,12 +16,16 @@ impl From<PortalColorScheme> for Mode {
     }
 }
 
-pub(crate) async fn initial_value() -> Mode {
-    XdgPortalSettings::new()
-        .await
-        .unwrap()
-        .color_scheme()
-        .await
-        .unwrap()
-        .into()
+pub(crate) async fn get_color_scheme() -> Mode {
+    let Ok(settings) = XdgPortalSettings::new().await else {
+        log::error!("Failed to create a new portal settings instance.");
+        return Mode::Default;
+    };
+
+    let Ok(color_scheme) = settings.color_scheme().await else {
+        log::error!("Failed to get the current color scheme, defaulting to Mode::Default.");
+        return Mode::Default;
+    };
+
+    color_scheme.into()
 }

src/platforms/freedesktop/notify.rs

@@ -1,10 +1,12 @@
+use std::error::Error;
+
 use ashpd::desktop::settings::Settings;
 use futures::{stream, Stream, StreamExt};
 
 use crate::Mode;
 
-pub async fn subscribe() -> anyhow::Result<impl Stream<Item = Mode> + Send> {
-    let initial = stream::once(super::initial_value()).boxed();
+pub async fn subscribe() -> Result<impl Stream<Item = Mode> + Send, Box<dyn Error>> {
+    let initial = stream::once(super::get_color_scheme()).boxed();
     let later_updates = Settings::new()
         .await?
         .receive_color_scheme_changed()

src/platforms/macos/notify.rs

@@ -1,10 +1,11 @@
+use std::error::Error;
 use std::task::Poll;
 
 use futures::{stream, Stream};
 
 use crate::{detect, Mode};
 
-pub async fn subscribe() -> anyhow::Result<impl Stream<Item = Mode> + Send> {
+pub async fn subscribe() -> Result<impl Stream<Item = Mode> + Send, Box<dyn Error>> {
     let mut last_mode = detect();
 
     let stream = stream::poll_fn(move |ctx| -> Poll<Option<Mode>> {

src/platforms/websys/notify.rs

@@ -1,10 +1,11 @@
+use std::error::Error;
 use std::task::Poll;
 
 use futures::{stream, Stream};
 
 use crate::{detect, Mode};
 
-pub async fn subscribe() -> anyhow::Result<impl Stream<Item = Mode> + Send> {
+pub async fn subscribe() -> Result<impl Stream<Item = Mode> + Send, Box<dyn Error>> {
     let mut last_mode = detect();
 
     let stream = stream::poll_fn(move |ctx| -> Poll<Option<Mode>> {

src/platforms/windows/notify.rs

@@ -1,10 +1,11 @@
+use std::error::Error;
 use std::task::Poll;
 
 use futures::{stream, Stream};
 
 use crate::{detect, Mode};
 
-pub async fn subscribe() -> anyhow::Result<impl Stream<Item = Mode> + Send> {
+pub async fn subscribe() -> Result<impl Stream<Item = Mode> + Send, Box<dyn Error>> {
     let mut last_mode = detect();
 
     let stream = stream::poll_fn(move |ctx| -> Poll<Option<Mode>> {