Move where help is computed

schala-repl/src/repl/mod.rs

@@ -141,13 +141,15 @@ impl Repl {
     }
   }
 
-  fn print_help_message(&mut self) -> String {
+  fn print_help_message(&mut self, commands_passed_to_help: &[&str] ) -> String {
     let mut buf = String::new();
     let directives = match self.get_directives() {
       CommandTree::Top(children) => children,
       _ => panic!("Top-level CommandTree not Top")
     };
 
+    match commands_passed_to_help {
+      [] => {
         writeln!(buf, "MetaInterpreter options").unwrap();
         writeln!(buf, "-----------------------").unwrap();
 
@@ -160,12 +162,14 @@ impl Repl {
         writeln!(buf, "").unwrap();
         writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
         writeln!(buf, "-----------------------").unwrap();
-    //writeln!(buf, "{}", lang.custom_interpreter_directives_help()).unwrap();
-    //writeln!(buf, "{}", "<not implemented>").unwrap();
+      },
+      _ => {
+        writeln!(buf, "Command-specific help not available yet").unwrap();
+      }
+    };
     buf
   }
 
-
   fn get_cur_language_state(&mut self) -> &mut Box<ProgrammingLanguageInterface> {
     //TODO this is obviously not complete
     &mut self.language_states[0]
@@ -209,10 +213,7 @@ impl Repl {
         ::std::process::exit(0)
       })),
       CommandTree::term_with_function("help", Some("Print this help message"), Box::new(|repl: &mut Repl, cmds: &[&str]| {
-        Some(match cmds {
-          [] => repl.print_help_message(),
-          _ => format!("ARGS: {:?}", cmds)
-        })
+        Some(repl.print_help_message(cmds))
       })),
       CommandTree::nonterm("debug",
         Some("show or hide pass debug info for a given pass, or display the names of all passes, or turn timing on/off"),