Partial daemon mode for builtin LED control

src/error.rs

@@ -0,0 +1,36 @@
+use std::error::Error;
+use std::fmt;
+use std::fmt::{Debug, Display};
+
+#[derive(PartialEq)]
+pub(crate) enum AuraError {
+    ParseColour,
+    ParseSpeed,
+    ParseDirection,
+    ParseBrightness,
+}
+
+impl Debug for AuraError {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(self.description(), f)
+    }
+}
+
+impl Display for AuraError {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        Display::fmt(self.description(), f)
+    }
+}
+
+impl Error for AuraError {
+    fn description(&self) -> &str {
+        match self {
+            AuraError::ParseColour => "could not parse colour",
+            AuraError::ParseSpeed => "could not parse speed",
+            AuraError::ParseDirection => "could not parse direction",
+            AuraError::ParseBrightness => "could not parse brightness",
+        }
+    }
+}