feat(main): make use of the new results and backtrace

src/bin/main.rs

@@ -75,6 +75,32 @@ struct Args {
 }
 
 fn main() {
+    let res = actual_main();
+
+    if let Err(err) = res {
+        eprintln!("Error:\n{err}");
+        #[cfg(feature = "backtrace")]
+        {
+            let backtrace = err.backtrace().to_string();
+
+            if backtrace == "disabled backtrace" {
+                eprintln!(
+                    "note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace"
+                );
+            } else {
+                eprintln!("{}", backtrace);
+            }    
+        }
+        #[cfg(not(feature = "backtrace"))]
+        {
+            eprintln!("backtrace support is disabled, enable feature \"backtrace\"");
+        }
+
+        std::process::exit(1);
+    }
+}
+
+fn actual_main() -> anyhow::Result<()> {
     let args: Args = Args::from_args();
     let cols = args.autogenerated_columns.unwrap_or_default();
     let mut default_table_options = TableOptions::default()
@@ -104,5 +130,7 @@ fn main() {
             schema_path: args.schema_path.unwrap_or("crate::schema::".to_owned()),
             model_path: args.model_path.unwrap_or("crate::models::".to_owned()),
         },
-    );
+    )?;
+
+    Ok(())
 }