[Spring] Fix the crash in windows.

src/spring/HISTORY.md

@@ -1,6 +1,10 @@
 Release History
 ===============
 
+1.1.9
+---
+* Fix the crash in windows.
+
 1.1.8
 ---
 * Add command `az spring app connect`.

src/spring/azext_spring/custom.py

@@ -9,7 +9,6 @@
 import re
 import os
 import time
-import tty
 from azure.cli.core._profile import Profile
 
 from ._websocket import WebSocketConnection, recv_remote, send_stdin, EXEC_PROTOCOL_CTRL_C_MSG
@@ -1499,7 +1498,13 @@ def app_connect(cmd, client, resource_group, service, name,
     reader.daemon = True
     reader.start()
 
-    tty.setcbreak(sys.stdin.fileno())  # needed to prevent printing arrow key characters
+    try:
+        import tty
+        tty.setcbreak(sys.stdin.fileno())  # needed to prevent printing arrow key characters
+    except ModuleNotFoundError:
+        # tty works only on Unix
+        pass
+
     writer = Thread(target=send_stdin, args=(conn,))
     writer.daemon = True
     writer.start()

src/spring/setup.py

@@ -16,7 +16,7 @@
 
 # TODO: Confirm this is the right version number you want and it matches your
 # HISTORY.rst entry.
-VERSION = '1.1.8'
+VERSION = '1.1.9'
 
 # The full list of classifiers is available at
 # https://pypi.python.org/pypi?%3Aaction=list_classifiers