usable backend for terminal launch

src-tauri/src/errors.rs

@@ -1,5 +1,6 @@
 use std::error::Error;
 use std::convert::AsRef;
+use std::ffi::OsString;
 use std::sync::mpsc;
 use strum_macros::AsRefStr;
 
@@ -216,7 +217,7 @@ pub enum RequestError {
 }
 
 
-// Errors encountered while running a subprocess (via creddy exec)
+// Errors encountered while running a subprocess via creddy exec
 #[derive(Debug, ThisError, AsRefStr)]
 pub enum ExecError {
     #[error("Please specify a command")]
@@ -237,6 +238,18 @@ pub enum CliError {
 }
 
 
+// Errors encountered while trying to launch a child process
+#[derive(Debug, ThisError, AsRefStr)]
+pub enum LaunchError {
+    #[error("Executable not found: {0:?}")]
+    ExeNotFound(OsString),
+    #[error("Failed to execute command: {0}")]
+    ExecutionFailed(#[from] std::io::Error),
+    #[error(transparent)]
+    GetCredentials(#[from] GetCredentialsError),
+}
+
+
 // =========================
 // Serialize implementations
 // =========================
@@ -327,3 +340,18 @@ impl Serialize for UnlockError {
         map.end()
     }
 }
+
+
+impl Serialize for LaunchError {
+    fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
+        let mut map = serializer.serialize_map(None)?;
+        map.serialize_entry("code", self.as_ref())?;
+        map.serialize_entry("msg", &format!("{self}"))?;
+
+        match self {
+            LaunchError::GetCredentials(src) => map.serialize_entry("source", &src)?,
+            _ => serialize_upstream_err(self, &mut map)?,
+        }
+        map.end()
+    }
+}