manifests

Documentation

Overview

Package manifests contains types and functionality around generating (rendering) the descriptors of the component's dependent resources. Most prominently, this is the Generator interface itself, and some tooling to enhance or transform existing generators.

Index

• func MergeMapInto(x map[string]any, y map[string]any)
• func MergeMaps(x, y map[string]any) map[string]any
• type DummyGenerator
  • func NewDummyGenerator() (*DummyGenerator, error)
  • func (g *DummyGenerator) Generate(ctx context.Context, namespace string, name string, ...) ([]client.Object, error)
• type Generator
• type ObjectTransformer
• type ParameterTransformer
• type TemplateParameterTransformer
  • func NewTemplateParameterTransformer(fsys fs.FS, path string) (*TemplateParameterTransformer, error)
  • func (t *TemplateParameterTransformer) TransformParameters(namespace string, name string, parameters types.Unstructurable) (types.Unstructurable, error)
• type TransformableGenerator
  • func NewGenerator(generator Generator) TransformableGenerator

Functions

func MergeMapInto

func MergeMapInto(x map[string]any, y map[string]any)

Deep-merge second map (y) over first map (x) with the usual logic. The first map will be changed (unless y is empty or nil), the second map will not be changed. The first map must not be nil, the second map is allowed to be nil.

func MergeMaps

func MergeMaps(x, y map[string]any) map[string]any

Deep-merge two maps with the usual logic and return the result. The first map (x) must be deeply JSON (i.e. consist deeply of JSON values only). The maps given as input will not be changed. Both maps can be passed as nil.

Types

type DummyGenerator

type DummyGenerator struct{}

DummyGenerator is a generator that does nothing.

func NewDummyGenerator

func NewDummyGenerator() (*DummyGenerator, error)

Create a new DummyGenerator.

func (*DummyGenerator) Generate

func (g *DummyGenerator) Generate(ctx context.Context, namespace string, name string, parameters types.Unstructurable) ([]client.Object, error)

Generate resource descriptors.

type Generator

type Generator interface {
	Generate(ctx context.Context, namespace string, name string, parameters types.Unstructurable) ([]client.Object, error)
}

Resource generator interface. When called from the reconciler, the arguments namespace and name will match the component's namespace and name or, if the component or its spec implement the PlacementConfiguration interface, the return values of the GetDeploymentNamespace(), GetDeploymentName() methods (if non-empty). The parameters argument will be assigned the return value of the component's GetSpec() method.

type ObjectTransformer

type ObjectTransformer interface {
	TransformObjects(namespace string, name string, objects []client.Object) ([]client.Object, error)
}

Object transformer interface. Allows to manipulate the parameters returned by an existing generator.

type ParameterTransformer

type ParameterTransformer interface {
	TransformParameters(namespace string, name string, parameters types.Unstructurable) (types.Unstructurable, error)
}

Parameter transformer interface. Allows to manipulate the parameters passed to an existing generator.

type TemplateParameterTransformer

type TemplateParameterTransformer struct {
	// contains filtered or unexported fields
}

TemplateParameterTransformer allows to transform parameters through a given go template. The template can use all functions from the sprig library, plus toYaml, fromYaml, toJson, fromJson, required.

func NewTemplateParameterTransformer

func NewTemplateParameterTransformer(fsys fs.FS, path string) (*TemplateParameterTransformer, error)

Create a new TemplateParameterTransformer (reading the template from the given fsys and path). If fsys is nil, the local OS filesystem will be used.

func (*TemplateParameterTransformer) TransformParameters

func (t *TemplateParameterTransformer) TransformParameters(namespace string, name string, parameters types.Unstructurable) (types.Unstructurable, error)

Transform parameters.

type TransformableGenerator

type TransformableGenerator interface {
	Generator
	WithParameterTransformer(transformer ParameterTransformer) TransformableGenerator
	WithObjectTransformer(transformer ObjectTransformer) TransformableGenerator
}

Interface for generators that can be enhanced with parameter/object transformers.

func NewGenerator

func NewGenerator(generator Generator) TransformableGenerator

Wrap a given Generator into a TransformableGenerator, to allow to attach further parameter or object transformers to it.