SCSI support: ROG Arion external drive LED control

rog-scsi/src/error.rs

@@ -0,0 +1,41 @@
+use std::{error, fmt};
+
+#[derive(Debug)]
+pub enum Error {
+    ParseMode,
+    ParseColour,
+    ParseSpeed,
+    ParseDirection,
+    IoPath(String, std::io::Error),
+    Ron(ron::Error),
+    RonParse(ron::error::SpannedError),
+}
+
+impl fmt::Display for Error {
+    // This trait requires `fmt` with this exact signature.
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Error::ParseColour => write!(f, "Could not parse colour"),
+            Error::ParseSpeed => write!(f, "Could not parse speed"),
+            Error::ParseDirection => write!(f, "Could not parse direction"),
+            Error::ParseMode => write!(f, "Could not parse mode"),
+            Error::IoPath(path, io) => write!(f, "IO Error: {path}, {io}"),
+            Error::Ron(e) => write!(f, "RON Parse Error: {e}"),
+            Error::RonParse(e) => write!(f, "RON Parse Error: {e}"),
+        }
+    }
+}
+
+impl error::Error for Error {}
+
+impl From<ron::Error> for Error {
+    fn from(e: ron::Error) -> Self {
+        Self::Ron(e)
+    }
+}
+
+impl From<ron::error::SpannedError> for Error {
+    fn from(e: ron::error::SpannedError) -> Self {
+        Self::RonParse(e)
+    }
+}