feat: Add configuration to change the character for non-zero sta… (#133)

Prompt can now switch characters in addition to switching character color. Add configuration options in so that users can do either, both, or neither.

src/module.rs

@@ -44,7 +44,7 @@ impl<'a> Module<'a> {
         let mut segment = Segment::new(name);
         segment.set_style(self.style);
         // Use the provided value unless overwritten by config
-        segment.set_value(self.config_value(name).unwrap_or(value));
+        segment.set_value(self.config_value_str(name).unwrap_or(value));
         self.segments.push(segment);
 
         self.segments.last_mut().unwrap()
@@ -96,7 +96,7 @@ impl<'a> Module<'a> {
     }
 
     /// Get a module's config value as a string
-    fn config_value(&self, key: &str) -> Option<&str> {
+    pub fn config_value_str(&self, key: &str) -> Option<&str> {
         self.config.and_then(|config| config.get_as_str(key))
     }
 

src/modules/character.rs

@@ -10,17 +10,29 @@ use ansi_term::Color;
 /// - If the exit-code was anything else, the arrow will be formatted with
 /// `COLOR_FAILURE` (red by default)
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
-    const PROMPT_CHAR: &str = "➜";
+    const SUCCESS_CHAR: &str = "➜";
+    const FAILURE_CHAR: &str = "✖";
     let color_success = Color::Green.bold();
     let color_failure = Color::Red.bold();
 
     let mut module = context.new_module("character")?;
     module.get_prefix().set_value("");
 
-    let symbol = module.new_segment("symbol", PROMPT_CHAR);
-
     let arguments = &context.arguments;
-    if arguments.value_of("status_code").unwrap_or("0") == "0" {
+    let use_symbol = module
+        .config_value_bool("use_symbol_for_status")
+        .unwrap_or(false);
+    let exit_success = arguments.value_of("status_code").unwrap_or("0") == "0";
+
+    /* If an error symbol is set in the config, use symbols to indicate
+    success/failure, in addition to color */
+    let symbol = if use_symbol && !exit_success {
+        module.new_segment("error_symbol", FAILURE_CHAR)
+    } else {
+        module.new_segment("symbol", SUCCESS_CHAR)
+    };
+
+    if exit_success {
         symbol.set_style(color_success.bold());
     } else {
         symbol.set_style(color_failure.bold());