[nsh] Fix broken wait_for() implementation

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.5.5
+
+- Fix NSH protocol `wait_for()` function implementation.
+
 ## 1.5.4
 
 - Allow NSH port to be opened by filepath.

pyproject.toml

@@ -40,6 +40,7 @@ dependencies = [
 dynamic = ["version"]
 
 [project.urls]
+"Docs" = "https://auterion.github.io/embedded-debug-tools/emdbg.html"
 "GitHub" = "https://github.com/auterion/embedded-debug-tools"
 "Changelog" = "https://github.com/auterion/embedded-debug-tools/blob/main/CHANGELOG.md"
 

src/emdbg/serial/protocol.py

@@ -165,16 +165,15 @@ def wait_for(self, pattern: str, timeout: float = _TIMEOUT) -> str | None:
 
         :return: received lines until matched pattern or None on timeout
         """
-        lines = []
+        lines = ""
         start = time.time()
         while True:
             if time.time() - start > timeout:
                 break
-            new_lines = self.read_lines(0)
-            lines.append(new_lines)
-            for line in new_lines:
-                if re.search(pattern, line):
-                    return self._join(lines)
+            if (new_lines := self.read_lines(0)) is not None:
+                lines += new_lines
+                if re.search(pattern, new_lines):
+                    return lines
             time.sleep(0.1)
         _LOGGER.warning(f"Waiting for '{pattern}' timed out after {timeout:.1f}s!")
         return None