add error handling for missing metadata.yml file

Author: aaronsteers

airbyte_cdk/cli/airbyte_cdk/_image.py

@@ -63,11 +63,16 @@ def build(
         connector_directory=connector_directory,
     )
 
-    metadata = MetadataFile.from_file(connector_directory / "metadata.yaml")
-    click.echo(
-        f"Building Image for Connector: {metadata.data.dockerRepository} "
-        f"(v{metadata.data.dockerImageTag})"
-    )
+    metadata_file_path: Path = connector_directory / "metadata.yaml"
+    try:
+        metadata = MetadataFile.from_file(metadata_file_path)
+    except (FileNotFoundError, ValueError) as e:
+        click.echo(
+            f"Error loading metadata file '{metadata_file_path}': {e!s}",
+            err=True,
+        )
+        sys.exit(1)
+    click.echo(f"Building Image for Connector: {metadata.data.dockerRepository}:{tag}")
     build_connector_image(
         connector_directory=connector_directory,
         connector_name=connector_name,