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clusterclass_client.go
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clusterclass_client.go
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/*
Copyright 2021 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package repository
import (
"context"
"github.com/pkg/errors"
"sigs.k8s.io/cluster-api/cmd/clusterctl/client/config"
yaml "sigs.k8s.io/cluster-api/cmd/clusterctl/client/yamlprocessor"
logf "sigs.k8s.io/cluster-api/cmd/clusterctl/log"
)
// ClusterClassClient has methods to work with cluster class templates hosted on a provider repository.
// Templates are yaml files to be used for creating a guest cluster.
type ClusterClassClient interface {
Get(ctx context.Context, name, targetNamespace string, skipTemplateProcess bool) (Template, error)
}
type clusterClassClient struct {
version string
provider config.Provider
repository Repository
configVariablesClient config.VariablesClient
processor yaml.Processor
}
// ClusterClassClientInput is an input struct for newClusterClassClient.
type ClusterClassClientInput struct {
version string
provider config.Provider
repository Repository
configVariablesClient config.VariablesClient
processor yaml.Processor
}
func newClusterClassClient(input ClusterClassClientInput) *clusterClassClient {
return &clusterClassClient{
version: input.version,
provider: input.provider,
repository: input.repository,
configVariablesClient: input.configVariablesClient,
processor: input.processor,
}
}
func (cc *clusterClassClient) Get(ctx context.Context, name, targetNamespace string, skipTemplateProcess bool) (Template, error) {
log := logf.Log
if targetNamespace == "" {
return nil, errors.New("invalid arguments: please provide a targetNamespace")
}
version := cc.version
filename := cc.processor.GetClusterClassTemplateName(version, name)
// read the component YAML, reading the local override file if it exists, otherwise read from the provider repository
rawArtifact, err := getLocalOverride(&newOverrideInput{
configVariablesClient: cc.configVariablesClient,
provider: cc.provider,
version: version,
filePath: filename,
})
if err != nil {
return nil, err
}
if rawArtifact == nil {
log.V(5).Info("Fetching", "File", filename, "Provider", cc.provider.Name(), "Type", cc.provider.Type(), "Version", version)
rawArtifact, err = cc.repository.GetFile(ctx, version, filename)
if err != nil {
return nil, errors.Wrapf(err, "failed to read %q from provider's repository %q", filename, cc.provider.ManifestLabel())
}
} else {
log.V(1).Info("Using", "Override", filename, "Provider", cc.provider.ManifestLabel(), "Version", version)
}
return NewTemplate(TemplateInput{
rawArtifact,
cc.configVariablesClient,
cc.processor,
targetNamespace,
skipTemplateProcess,
})
}