[AUR-424] Setup CLI interface (#25)

* [AUR-424] Setup CLI interface

* [AUR-424] fix test_vectorstore:test_query

* [AUR-424] exclude examples when setup CLI

* [AUR-424] create kh and kh --export

* [AUR-426] revise cli by using click.group

* Fix dynamic import

* [AUR-426] revert the format of import packages

* [AUR-426] set argument default

* [AUR-426] set click dependencies in setup.py

---------

Co-authored-by: trducng <trungduc1992@gmail.com>

knowledgehub/cli.py

@@ -0,0 +1,56 @@
+import os
+
+import click
+import yaml
+
+from kotaemon.contribs.promptui.config import export_pipeline_to_config
+from kotaemon.contribs.promptui.ui import build_from_dict
+
+
+# check if the output is not a .yml file -> raise error
+def check_config_format(config):
+    if os.path.exists(config):
+        if isinstance(config, str):
+            with open(config) as f:
+                yaml.safe_load(f)
+        else:
+            raise ValueError("config must be yaml format.")
+
+
+@click.group()
+def main():
+    pass
+
+
+@click.group()
+def promptui():
+    pass
+
+
+main.add_command(promptui)
+
+
+@promptui.command()
+@click.argument("export_path", nargs=1)
+@click.option("--output", default="promptui.yml", required=False)
+def export(export_path, output):
+
+    import sys
+
+    from theflow.utils.modules import import_dotted_string
+
+    sys.path.append(os.getcwd())
+    cls = import_dotted_string(export_path, safe=False)
+    export_pipeline_to_config(cls, output)
+    check_config_format(output)
+
+
+@promptui.command()
+@click.argument("run_path", required=False, default="promptui.yml")
+def run(run_path):
+    build_from_dict(run_path)
+    check_config_format(run_path)
+
+
+if __name__ == "__main__":
+    main()