libs: add cli, sdk-py, sdk-js and move core langgraph

libs/cli/langgraph_cli/progress.py

@@ -0,0 +1,64 @@
+import sys
+import threading
+import time
+from typing import Callable
+
+
+class Progress:
+    delay: float = 0.1
+
+    @staticmethod
+    def spinning_cursor():
+        while True:
+            yield from "|/-\\"
+
+    def __init__(self, *, message=""):
+        self.message = message
+        self.spinner_generator = self.spinning_cursor()
+
+    def spinner_iteration(self):
+        message = self.message
+        sys.stdout.write(next(self.spinner_generator) + " " + message)
+        sys.stdout.flush()
+        time.sleep(self.delay)
+        # clear the spinner and message
+        sys.stdout.write(
+            "\b" * (len(message) + 2)
+            + " " * (len(message) + 2)
+            + "\b" * (len(message) + 2)
+        )
+        sys.stdout.flush()
+
+    def spinner_task(self):
+        while self.message:
+            message = self.message
+            sys.stdout.write(next(self.spinner_generator) + " " + message)
+            sys.stdout.flush()
+            time.sleep(self.delay)
+            # clear the spinner and message
+            sys.stdout.write(
+                "\b" * (len(message) + 2)
+                + " " * (len(message) + 2)
+                + "\b" * (len(message) + 2)
+            )
+            sys.stdout.flush()
+
+    def __enter__(self) -> Callable[[str], None]:
+        self.thread = threading.Thread(target=self.spinner_task)
+        self.thread.start()
+
+        def set_message(message):
+            self.message = message
+            if not message:
+                self.thread.join()
+
+        return set_message
+
+    def __exit__(self, exception, value, tb):
+        self.message = ""
+        try:
+            self.thread.join()
+        finally:
+            del self.thread
+        if exception is not None:
+            return False