Add provider entry_points for airflow UI (#626)

* Add provider entry_points for airflow UI

astronomer/providers/package.py

@@ -0,0 +1,21 @@
+import configparser
+from pathlib import Path
+from typing import Any, Dict
+
+config = configparser.ConfigParser(strict=False)
+_REPO_DIR = Path(__file__).parent.parent.parent
+config.read(_REPO_DIR / "setup.cfg")
+
+
+def get_provider_info() -> Dict[str, Any]:
+    """Return provider metadata to Airflow"""
+    return {
+        # Required.
+        "package-name": "astronomer-providers",
+        "name": "Astronomer Providers",
+        "description": config["metadata"]["description"],
+        "versions": [config["metadata"]["version"]],
+        # Optional.
+        "hook-class-names": [],
+        "extra-links": [],
+    }

setup.cfg

@@ -134,6 +134,10 @@ all =
 include =
     astronomer.*
 
+[options.entry_points]
+apache_airflow_provider=
+  provider_info=astronomer.providers.package:get_provider_info
+
 [flake8]
 enable-extensions=G
 exclude = venv/*,tox/*,specs/*