cloudapi: Use distro repos if none included in imageRequest

In order to support cloudapi blueprint requests from the cmdline using
composer-cli it needs to select the repositories based on the selected
distribution instead of requiring the user to include them with the
request.

If the image request includes repositories they are used, which matches
the current behavior. If the repository list is empty it will use the
distribution name to select from the repositories shipped with
osbuild-composer.

internal/cloudapi/v2/handler.go

@@ -212,6 +212,15 @@ func (h *apiHandlers) PostCompose(ctx echo.Context) error {
 			return err
 		}
 
+		// If no repositories are included with the imageRequest use the defaults for the distro
+		if len(ir.Repositories) == 0 {
+			dr, err := h.server.repos.ReposByImageTypeName(distribution.Name(), arch.Name(), imageType.Name())
+			if err != nil {
+				return err
+			}
+			repos = append(repos, dr...)
+		}
+
 		// Get the initial ImageOptions with image size set
 		imageOptions := ir.GetImageOptions(imageType, bp)
 

internal/cloudapi/v2/v2_test.go

@@ -35,7 +35,6 @@ func newV2Server(t *testing.T, dir string, depsolveChannels []string, enableJWT
 	distros := distrofactory.NewTestDefault()
 	require.NotNil(t, distros)
 
-	// TODO pass it a real path?
 	repos, err := reporegistry.NewTestedDefault()
 	require.Nil(t, err)
 	require.NotNil(t, repos)