Migrate from setup.py to pyproject.toml (#440)

* Converted setup.py to pyproject.toml

* Modern package infrastructure as recommended by py docs

trustgraph-cli/trustgraph/cli/stop_flow.py

@@ -0,0 +1,52 @@
+"""
+Stops a processing flow.
+"""
+
+import argparse
+import os
+import tabulate
+from trustgraph.api import Api
+import json
+
+default_url = os.getenv("TRUSTGRAPH_URL", 'http://localhost:8088/')
+
+def stop_flow(url, flow_id):
+
+    api = Api(url).flow()
+
+    api.stop(id = flow_id)
+
+def main():
+
+    parser = argparse.ArgumentParser(
+        prog='tg-stop-flow',
+        description=__doc__,
+    )
+
+    parser.add_argument(
+        '-u', '--api-url',
+        default=default_url,
+        help=f'API URL (default: {default_url})',
+    )
+
+    parser.add_argument(
+        '-i', '--flow-id',
+        required=True,
+        help=f'Flow ID',
+    )
+
+    args = parser.parse_args()
+
+    try:
+
+        stop_flow(
+            url=args.api_url,
+            flow_id=args.flow_id,
+        )
+
+    except Exception as e:
+
+        print("Exception:", e, flush=True)
+
+if __name__ == "__main__":
+    main()