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chartapplier.go
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/
chartapplier.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package kubernetes
import (
"context"
"embed"
"k8s.io/client-go/rest"
"github.com/gardener/gardener/pkg/chartrenderer"
)
// ChartApplier is an interface that describes needed methods that render and apply
// Helm charts in Kubernetes clusters.
type ChartApplier interface {
chartrenderer.Interface
ApplyFromEmbeddedFS(ctx context.Context, embeddedFS embed.FS, chartPath, namespace, name string, opts ...ApplyOption) error
DeleteFromEmbeddedFS(ctx context.Context, embeddedFS embed.FS, chartPath, namespace, name string, opts ...DeleteOption) error
}
// chartApplier is a structure that contains a chart renderer and a manifest applier.
type chartApplier struct {
chartrenderer.Interface
Applier
}
// NewChartApplier returns a new chart applier.
func NewChartApplier(renderer chartrenderer.Interface, applier Applier) ChartApplier {
return &chartApplier{renderer, applier}
}
// NewChartApplierForConfig returns a new chart applier based on the given REST config.
func NewChartApplierForConfig(config *rest.Config) (ChartApplier, error) {
renderer, err := chartrenderer.NewForConfig(config)
if err != nil {
return nil, err
}
applier, err := NewApplierForConfig(config)
if err != nil {
return nil, err
}
return NewChartApplier(renderer, applier), nil
}
func (c *chartApplier) ApplyFromEmbeddedFS(ctx context.Context, embeddedFS embed.FS, chartPath, namespace, name string, opts ...ApplyOption) error {
applyOpts := &ApplyOptions{}
for _, o := range opts {
if o != nil {
o.MutateApplyOptions(applyOpts)
}
}
if len(applyOpts.MergeFuncs) == 0 {
applyOpts.MergeFuncs = DefaultMergeFuncs
}
manifestReader, err := c.newManifestReader(embeddedFS, chartPath, namespace, name, applyOpts.Values)
if err != nil {
return err
}
if applyOpts.ForceNamespace {
manifestReader = NewNamespaceSettingReader(manifestReader, namespace)
}
return c.ApplyManifest(ctx, manifestReader, applyOpts.MergeFuncs)
}
func (c *chartApplier) DeleteFromEmbeddedFS(ctx context.Context, embeddedFS embed.FS, chartPath, namespace, name string, opts ...DeleteOption) error {
deleteOpts := &DeleteOptions{}
for _, o := range opts {
if o != nil {
o.MutateDeleteOptions(deleteOpts)
}
}
manifestReader, err := c.newManifestReader(embeddedFS, chartPath, namespace, name, deleteOpts.Values)
if err != nil {
return err
}
if deleteOpts.ForceNamespace {
manifestReader = NewNamespaceSettingReader(manifestReader, namespace)
}
deleteManifestOpts := []DeleteManifestOption{}
for _, tf := range deleteOpts.TolerateErrorFuncs {
if tf != nil {
deleteManifestOpts = append(deleteManifestOpts, tf)
}
}
return c.DeleteManifest(ctx, manifestReader, deleteManifestOpts...)
}
func (c *chartApplier) newManifestReader(embeddedFS embed.FS, chartPath, namespace, name string, values interface{}) (UnstructuredReader, error) {
var (
release *chartrenderer.RenderedChart
err error
)
release, err = c.RenderEmbeddedFS(embeddedFS, chartPath, name, namespace, values)
if err != nil {
return nil, err
}
return NewManifestReader(release.Manifest()), nil
}