feat(username): add aliases option (#5855)

* Create place to put it in the config

* Initial functional version

* Fix grammar

* Add option documentation to README

* Add test for two aliases and emoji translation

* Remove println

* Rewrite match as iflet

* Improve converting the reference

* Format file

* Try to restore autoformat of markdown

* Replace toml:Map with concrete IndexMap

* Update schema

* Add option that got lost

src/configs/username.rs

@@ -1,3 +1,4 @@
+use indexmap::IndexMap;
 use serde::{Deserialize, Serialize};
 
 #[derive(Clone, Deserialize, Serialize)]
@@ -14,6 +15,7 @@ pub struct UsernameConfig<'a> {
     pub style_user: &'a str,
     pub show_always: bool,
     pub disabled: bool,
+    pub aliases: IndexMap<String, &'a str>,
 }
 
 impl<'a> Default for UsernameConfig<'a> {
@@ -25,6 +27,7 @@ impl<'a> Default for UsernameConfig<'a> {
             style_user: "yellow bold",
             show_always: false,
             disabled: false,
+            aliases: IndexMap::new(),
         }
     }
 }

src/modules/username.rs

@@ -40,6 +40,10 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
         return None; // [A]
     }
 
+    if let Some(&alias) = config.aliases.get(&username) {
+        username = alias.to_string();
+    }
+
     let parsed = StringFormatter::new(config.format).and_then(|formatter| {
         formatter
             .map_style(|variable| match variable {
@@ -323,4 +327,40 @@ mod tests {
 
         assert_eq!(expected, actual.as_deref());
     }
+
+    #[test]
+    fn test_alias() {
+        let actual = ModuleRenderer::new("username")
+            .env(super::USERNAME_ENV_VAR, "astronaut")
+            .config(toml::toml! {
+                [username]
+                show_always = true
+                aliases = { "astronaut" = "skywalker" }
+
+                style_root = ""
+                style_user = ""
+            })
+            .collect();
+        let expected = Some("skywalker in ");
+
+        assert_eq!(expected, actual.as_deref());
+    }
+
+    #[test]
+    fn test_alias_emoji() {
+        let actual = ModuleRenderer::new("username")
+            .env(super::USERNAME_ENV_VAR, "kaas")
+            .config(toml::toml! {
+                [username]
+                show_always = true
+                aliases = { "a" = "b", "kaas" = "🧀" }
+
+                style_root = ""
+                style_user = ""
+            })
+            .collect();
+        let expected = Some("🧀 in ");
+
+        assert_eq!(expected, actual.as_deref());
+    }
 }