Function convertServiceConfigObjs

cli/compose/convert/service.go:290–357

convertServiceConfigObjs takes an API client, a namespace, a ServiceConfig, and a set of compose Config specs, and creates the swarm ConfigReferences required by the service. Unlike convertServiceSecrets, this takes the whole ServiceConfig, because some Configs may be needed as a result of other fie

(
	ctx context.Context,
	apiClient client.ConfigAPIClient,
	namespace Namespace,
	service composetypes.ServiceConfig,
	configSpecs map[string]composetypes.ConfigObjConfig,
)

//
// TODO: fix configs API so that ConfigsAPIClient is not required here
func convertServiceConfigObjs(
	ctx context.Context,
	apiClient client.ConfigAPIClient,
	namespace Namespace,
	service composetypes.ServiceConfig,
	configSpecs map[string]composetypes.ConfigObjConfig,
) ([]*swarm.ConfigReference, error) {
	refs := []*swarm.ConfigReference{}

	lookup := func(key string) (composetypes.FileObjectConfig, error) {
		configSpec, exists := configSpecs[key]
		if !exists {
			return composetypes.FileObjectConfig{}, fmt.Errorf("undefined config %q", key)
		}
		return composetypes.FileObjectConfig(configSpec), nil
	}
	for _, config := range service.Configs {
		obj, err := convertFileObject(namespace, composetypes.FileReferenceConfig(config), lookup)
		if err != nil {
			return nil, err
		}

		file := swarm.ConfigReferenceFileTarget(obj.File)
		refs = append(refs, &swarm.ConfigReference{
			File:       &file,
			ConfigName: obj.Name,
		})
	}

	// finally, after converting all file objects, create any
	// Runtime-type configs that are needed. these are configs that are not
	// mounted into the container, but are used in some other way by the
	// container runtime. Currently, this only means CredentialSpecs, but in
	// the future it may be used for other fields

	// grab the CredentialSpec out of the Service
	credSpec := service.CredentialSpec
	// if the credSpec uses a config, then we should grab the config name, and
	// create a config reference for it. A File or Registry-type CredentialSpec
	// does not need this operation.
	if credSpec.Config != "" {
		// look up the config in the configSpecs.
		obj, err := lookup(credSpec.Config)
		if err != nil {
			return nil, err
		}

		// get the actual correct name.
		name := namespace.Scope(credSpec.Config)
		if obj.Name != "" {
			name = obj.Name
		}

		// now append a Runtime-type config.
		refs = append(refs, &swarm.ConfigReference{
			ConfigName: name,
			Runtime:    &swarm.ConfigReferenceRuntimeTarget{},
		})