Add AdapterRegistered event log message (#7862)

* Add AdapterRegistered event log message

* Add AdapterRegistered to unit test

* make versioning and logging consistent

* make versioning and logging consistent

* add to_version_string

* remove extra equals

* format fire_event

.changes/unreleased/Features-20230613-151507.yaml

@@ -0,0 +1,6 @@
+kind: Features
+body: Add AdapterRegistered event log message
+time: 2023-06-13T15:15:07.367371-07:00
+custom:
+  Author: colin-rogers-dbt
+  Issue: "7038"

core/dbt/adapters/factory.py

@@ -9,10 +9,11 @@
 from dbt.adapters.protocol import AdapterConfig, AdapterProtocol, RelationProtocol
 from dbt.contracts.connection import AdapterRequiredConfig, Credentials
 from dbt.events.functions import fire_event
-from dbt.events.types import AdapterImportError, PluginLoadError
+from dbt.events.types import AdapterImportError, PluginLoadError, AdapterRegistered
 from dbt.exceptions import DbtInternalError, DbtRuntimeError
 from dbt.include.global_project import PACKAGE_PATH as GLOBAL_PROJECT_PATH
 from dbt.include.global_project import PROJECT_NAME as GLOBAL_PROJECT_NAME
+from dbt.semver import VersionSpecifier
 
 Adapter = AdapterProtocol
 
@@ -89,7 +90,13 @@ def load_plugin(self, name: str) -> Type[Credentials]:
     def register_adapter(self, config: AdapterRequiredConfig) -> None:
         adapter_name = config.credentials.type
         adapter_type = self.get_adapter_class_by_name(adapter_name)
-
+        adapter_version = import_module(f".{adapter_name}.__version__", "dbt.adapters").version
+        adapter_version_specifier = VersionSpecifier.from_version_string(
+            adapter_version
+        ).to_version_string()
+        fire_event(
+            AdapterRegistered(adapter_name=adapter_name, adapter_version=adapter_version_specifier)
+        )
         with self.lock:
             if adapter_name in self.adapters:
                 # this shouldn't really happen...

core/dbt/events/types.proto

@@ -671,6 +671,19 @@ message CacheDumpGraphMsg {
 
 // Skipping E032, E033, E034
 
+
+
+// E034
+message AdapterRegistered {
+    string adapter_name = 1;
+    string adapter_version = 2;
+}
+
+message AdapterRegisteredMsg {
+    EventInfo info = 1;
+    AdapterRegistered data = 2;
+}
+
 // E035
 message AdapterImportError {
     string exc = 1;

core/dbt/events/types.py

@@ -655,6 +655,14 @@ def message(self) -> str:
 # Skipping E032, E033, E034
 
 
+class AdapterRegistered(InfoLevel):
+    def code(self):
+        return "E034"
+
+    def message(self) -> str:
+        return f"Registered adapter: {self.adapter_name}{self.adapter_version}"
+
+
 class AdapterImportError(InfoLevel):
     def code(self):
         return "E035"

tests/unit/test_events.py

@@ -139,6 +139,7 @@ def test_event_codes(self):
     types.AdapterEventInfo(),
     types.AdapterEventWarning(),
     types.AdapterEventError(),
+    types.AdapterRegistered(adapter_name="dbt-awesome", adapter_version="1.2.3"),
     types.NewConnection(conn_type="", conn_name=""),
     types.ConnectionReused(conn_name=""),
     types.ConnectionLeftOpenInCleanup(conn_name=""),