/
options.go
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/
options.go
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// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 kubernetes
import (
"errors"
"time"
"k8s.io/client-go/rest"
baseconfig "k8s.io/component-base/config"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type config struct {
clientOptions client.Options
restConfig *rest.Config
cacheResync *time.Duration
}
// ConfigFunc is a function that mutates a Config struct.
// It implements the functional options pattern. See
// https://github.com/tmrts/go-patterns/blob/master/idiom/functional-options.md.
type ConfigFunc func(config *config) error
// WithRESTConfig returns a ConfigFunc that sets the passed rest.Config on the config object.
func WithRESTConfig(restConfig *rest.Config) ConfigFunc {
return func(config *config) error {
config.restConfig = restConfig
return nil
}
}
// WithClientConnectionOptions returns a ConfigFunc that transfers settings from
// the passed ClientConnectionConfiguration.
// The kubeconfig location in ClientConnectionConfiguration is disregarded, though!
func WithClientConnectionOptions(cfg baseconfig.ClientConnectionConfiguration) ConfigFunc {
return func(config *config) error {
if config.restConfig == nil {
return errors.New("REST config must be set before setting connection options")
}
config.restConfig.Burst = int(cfg.Burst)
config.restConfig.QPS = cfg.QPS
config.restConfig.AcceptContentTypes = cfg.AcceptContentTypes
config.restConfig.ContentType = cfg.ContentType
return nil
}
}
// WithClientOptions returns a ConfigFunc that sets the passed Options on the config object.
func WithClientOptions(opt client.Options) ConfigFunc {
return func(config *config) error {
config.clientOptions = opt
return nil
}
}
// WithCacheResyncPeriod returns a ConfigFunc that set the client's cache's resync period to the given duration.
func WithCacheResyncPeriod(resync time.Duration) ConfigFunc {
return func(config *config) error {
config.cacheResync = &resync
return nil
}
}