shell fully configurable

src/run.rs

@@ -25,8 +25,16 @@ use std::iter::FromIterator;
 use std::env::{vars, var, current_dir};
 use std::rc::Rc;
 
-fn prompt_default_callback(_: &Seg, _: &mut SymTable) -> Result<Ctr, String> {
-    Ok(Ctr::Symbol("λ".to_string()))
+fn l_prompt_default_callback(_: &Seg, _: &mut SymTable) -> Result<Ctr, String> {
+    Ok(Ctr::String("λ".to_string()))
+}
+
+fn r_prompt_default_callback(_: &Seg, _: &mut SymTable) -> Result<Ctr, String> {
+    Ok(Ctr::String(String::new()))
+}
+
+fn prompt_delimiter_default_callback(_: &Seg, _: &mut SymTable) -> Result<Ctr, String> {
+    Ok(Ctr::String(">".to_string()))
 }
 
 fn get_paths() -> Vec<String> {
@@ -70,15 +78,40 @@ default value: 1 (set)
     );
 
     syms.insert(
-        "CFG_RELISH_PROMPT".to_string(),
+        "CFG_RELISH_L_PROMPT".to_string(),
         Symbol {
-            name: String::from("default relish prompt"),
+            name: String::from("default relish left prompt"),
             args: Args::None,
             conditional_branches: false,
-            docs: "function called to output prompt. this function is called with no arguments.
-default value (<lambda>)"
+            docs: "function called to output prompt on left hand. this function is called with no arguments."
                 .to_string(),
-            value: ValueType::Internal(Rc::new(prompt_default_callback)),
+            value: ValueType::Internal(Rc::new(l_prompt_default_callback)),
+            ..Default::default()
+        },
+    );
+
+    syms.insert(
+        "CFG_RELISH_R_PROMPT".to_string(),
+        Symbol {
+            name: String::from("default relish right prompt"),
+            args: Args::None,
+            conditional_branches: false,
+            docs: "function called to output prompt on right hand. this function is called with no arguments."
+                .to_string(),
+            value: ValueType::Internal(Rc::new(r_prompt_default_callback)),
+            ..Default::default()
+        },
+    );
+
+    syms.insert(
+        "CFG_RELISH_PROMPT_DELIMITER".to_string(),
+        Symbol {
+            name: String::from("default relish prompt delimiter"),
+            args: Args::None,
+            conditional_branches: false,
+            docs: "function called to output prompt delimiter. this function is called with no arguments."
+                .to_string(),
+            value: ValueType::Internal(Rc::new(prompt_delimiter_default_callback)),
             ..Default::default()
         },
     );