feat: support bot (#579)

* feat: support bots

* refactor with RoleLike

* improve exiting session

* make bot works with rag

* refactor repl assert state

* add bot banner

* repl complete bots according bots.txt

* fix on windows

* remove threadpool executing function callings

* adjust repl left_prompt

* move bot config to global config.yaml

* `.bot` throw err if funciton callings is not configured

1 files changed, 6 insertions, 7 deletions

diff --git a/src/repl/completer.rs b/src/repl/completer.rs
index d026d67..1d68792 100644
--- a/src/repl/completer.rs
+++ b/src/repl/completer.rs
@@ -49,13 +49,12 @@ impl Completer for ReplCompleter {
         if parts_len > 1 {
             let span = Span::new(parts[parts_len - 1].1, pos);
             let args: Vec<&str> = parts.iter().skip(1).map(|(v, _)| *v).collect();
-            suggestions.extend(
-                self.config
-                    .read()
-                    .repl_complete(cmd, &args)
-                    .iter()
-                    .map(|(value, description)| create_suggestion(value, description, span)),
-            )
+            suggestions.extend(self.config.read().repl_complete(cmd, &args).iter().map(
+                |(value, description)| {
+                    let description = description.as_deref().unwrap_or_default();
+                    create_suggestion(value, description, span)
+                },
+            ))
         }
 
         if suggestions.is_empty() {