Add configuration mode command to jump to the top config level

src/internal_commands.rs

@@ -470,6 +470,17 @@ pub fn cmd_pwd(
     Ok(false)
 }
 
+// ===== "top" =====
+
+pub fn cmd_top(
+    _commands: &Commands,
+    session: &mut Session,
+    _args: ParsedArgs,
+) -> Result<bool, String> {
+    session.mode_config_top();
+    Ok(false)
+}
+
 // ===== "discard" =====
 
 pub fn cmd_discard(

src/internal_commands.xml

@@ -177,6 +177,7 @@
     <token name="exit" help="Exit from current mode." cmd="cmd_exit_config"/>
     <token name="list" help="Print command list." cmd="cmd_list"/>
     <token name="pwd" help="Display current mode path." cmd="cmd_pwd"/>
+    <token name="top" help="Return to top-level configuration mode." cmd="cmd_top"/>
     <token name="show" help="Show information about the system.">
       <token name="candidate" argument="configuration" help="Show candidate configuration." cmd="cmd_show_config">
         <token name="format" help="Configuration format.">

src/session.rs

@@ -149,6 +149,12 @@ impl Session {
         self.update_prompt();
     }
 
+    pub fn mode_config_top(&mut self) {
+        let nodes = self.mode.as_configure_mut().unwrap();
+        nodes.clear();
+        self.update_prompt();
+    }
+
     pub fn edit_candidate(
         &mut self,
         negate: bool,

src/token_xml.rs

@@ -76,6 +76,7 @@ fn parse_tag_token(
         "cmd_exit_config" => internal_commands::cmd_exit_config,
         "cmd_end" => internal_commands::cmd_end,
         "cmd_pwd" => internal_commands::cmd_pwd,
+        "cmd_top" => internal_commands::cmd_top,
         "cmd_discard" => internal_commands::cmd_discard,
         "cmd_commit" => internal_commands::cmd_commit,
         "cmd_validate" => internal_commands::cmd_validate,