Select an iPhone simulator matching the active Xcode SDK

tools/select_simulator.py

@@ -5,11 +5,13 @@ import uuid
 
 with open(sys.argv[1], encoding="utf-8") as stream:
     runtimes = json.load(stream)["devices"]
+sdk_version = sys.argv[2] if len(sys.argv) > 2 else None
 for runtime in sorted(runtimes, reverse=True):
-    if ".iOS-" not in runtime:
+    if ".iOS-" not in runtime or (sdk_version and not runtime.endswith(".iOS-" + sdk_version.replace(".", "-"))):
         continue
     for device in runtimes[runtime]:
         if device.get("isAvailable") and device.get("name", "").startswith("iPhone"):
-            print("SIMULATOR_ID=" + str(uuid.UUID(device["udid"])))
+            uuid.UUID(device["udid"])  # Validate without changing the case expected by xcodebuild.
+            print("SIMULATOR_ID=" + device["udid"])
             sys.exit(0)
 sys.exit("No available iPhone simulator in selected Xcode runtime.")