huskies: merge 1144 story Gateway trampoline-restart: detached helper survives the gateway's own death

server/src/chat/transport/matrix/rebuild.rs

@@ -40,6 +40,43 @@ pub fn extract_rebuild_command(
     }
 }
 
+/// Parse a "rebuild gateway" command from a raw message body.
+///
+/// Returns `Some(RebuildCommand)` only when the stripped message begins with
+/// "rebuild gateway" (case-insensitive).  A plain "rebuild" without the
+/// "gateway" qualifier returns `None` so it falls through to the standard
+/// server rebuild handler.
+pub fn extract_rebuild_gateway_command(
+    message: &str,
+    bot_name: &str,
+    bot_user_id: &str,
+) -> Option<RebuildCommand> {
+    let stripped = strip_bot_mention(message, bot_name, bot_user_id);
+    let trimmed = stripped
+        .trim()
+        .trim_start_matches(|c: char| !c.is_alphanumeric());
+
+    let (cmd, rest) = trimmed.split_once(char::is_whitespace)?;
+
+    if !cmd.eq_ignore_ascii_case("rebuild") {
+        return None;
+    }
+
+    let qualifier = rest
+        .trim()
+        .trim_start_matches(|c: char| !c.is_alphanumeric());
+    let first_word = match qualifier.split_once(char::is_whitespace) {
+        Some((w, _)) => w,
+        None => qualifier,
+    };
+
+    if first_word.eq_ignore_ascii_case("gateway") {
+        Some(RebuildCommand)
+    } else {
+        None
+    }
+}
+
 /// Handle a rebuild command: trigger server rebuild and restart.
 ///
 /// Returns a string describing the outcome.  On build failure the error