Add key_timeout config option (#1649)

crates/nu-cli/src/cli.rs

@@ -555,6 +555,13 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
 
         rl.set_edit_mode(edit_mode);
 
+        let key_timeout = config::config(Tag::unknown())?
+            .get("key_timeout")
+            .map(|s| s.value.expect_int())
+            .unwrap_or(1);
+
+        rl.set_keyseq_timeout(key_timeout as i32);
+
         let completion_mode = config::config(Tag::unknown())?
             .get("completion_mode")
             .map(|s| match s.value.expect_string() {

crates/nu-protocol/src/value.rs

@@ -20,6 +20,7 @@ use indexmap::IndexMap;
 use nu_errors::ShellError;
 use nu_source::{AnchorLocation, HasSpan, Span, Spanned, Tag};
 use num_bigint::BigInt;
+use num_traits::ToPrimitive;
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 use std::time::SystemTime;
@@ -122,6 +123,19 @@ impl UntaggedValue {
         }
     }
 
+    /// Expect this value to be an integer and return it
+    pub fn expect_int(&self) -> i64 {
+        let big_int = match self {
+            UntaggedValue::Primitive(Primitive::Int(int)) => Some(int),
+            _ => None,
+        };
+
+        match big_int.and_then(|i| i.to_i64()) {
+            Some(i) => i,
+            _ => panic!("expect_int assumes that the value must be a integer"),
+        }
+    }
+
     /// Helper for creating row values
     pub fn row(entries: IndexMap<String, Value>) -> UntaggedValue {
         UntaggedValue::Row(entries.into())