Group alias commands under `alias` subcommand

src/main.rs

@@ -13,12 +13,7 @@ use clap::SubCommand;
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    let matches = app_from_crate!()
-        .args_from_usage(
-            "-c, --config=[FILE] 'Sets custom config file'
-             -v, --verbose       'Prints more details when running'
-             -T, --token=[TOKEN] 'Specifies token for authentication'",
-        )
+    let app = app_from_crate!()
         .subcommand(
             SubCommand::with_name("login")
                 .about("authenticates and saves the session details")
@@ -28,35 +23,47 @@ async fn main() -> Result<()> {
         .subcommand(SubCommand::with_name("status").about("displays current session status"))
         .subcommand(SubCommand::with_name("list-rooms").about("lists rooms available to the user"))
         .subcommand(
-            SubCommand::with_name("add-alias")
-                .about("adds an alias to a room")
-                .args_from_usage(
-                    "<ROOM_ID>  'The ID of the room to alias'
-                     <ALIAS>    'The new alias to add'",
+            SubCommand::with_name("alias")
+                .about("alias subcommands")
+                .subcommand(
+                    SubCommand::with_name("add")
+                        .about("adds an alias to a room")
+                        .args_from_usage(
+                            "<ROOM_ID>  'The ID of the room to alias'
+                             <ALIAS>    'The new alias to add'",
+                        ),
+                )
+                .subcommand(
+                    SubCommand::with_name("delete")
+                        .about("deletes an existing alias")
+                        .args_from_usage("<ALIAS>    'The alias to delete'"),
                 ),
-        )
-        .subcommand(
-            SubCommand::with_name("del-alias")
-                .about("deletes an existing alias")
-                .args_from_usage("<ALIAS>    'The alias to delete'"),
-        )
-        .get_matches();
+        );
+    let matches = app.get_matches();
 
     match matches.subcommand() {
         ("login", Some(submatches)) => commands::login(submatches.value_of("user")).await?,
         ("status", Some(_)) => commands::status().await?,
         ("list-rooms", Some(_)) => commands::list_rooms().await?,
-        ("add-alias", Some(submatches)) => {
-            commands::add_alias(
-                submatches.value_of("ROOM_ID").unwrap(),
-                submatches.value_of("ALIAS").unwrap(),
-            )
-            .await?
+        ("alias", Some(alias)) => match alias.subcommand() {
+            ("add", Some(submatches)) => {
+                commands::add_alias(
+                    submatches.value_of("ROOM_ID").unwrap(),
+                    submatches.value_of("ALIAS").unwrap(),
+                )
+                .await?
+            }
+            ("delete", Some(submatches)) => {
+                commands::del_alias(submatches.value_of("ALIAS").unwrap()).await?
+            }
+            (c, _) => {
+                todo!("Subcommand '{}' not implemented yet!", c);
+            }
+        },
+        ("", None) => {
+            let mut out = io::stdout();
+            app.write_long_help(&mut out).unwrap();
         }
-        ("del-alias", Some(submatches)) => {
-            commands::del_alias(submatches.value_of("ALIAS").unwrap()).await?
-        }
-        ("", None) => bail!("No subcommand given"),
         (c, _) => {
             todo!("Subcommand '{}' not implemented yet!", c);
         }