133 lines
3.5 KiB
Go
133 lines
3.5 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package resource
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import (
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"fmt"
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"strings"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/util/validation"
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manifest "k8s.io/kubectl/pkg/apis/manifest/v1alpha1"
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cutil "k8s.io/kubectl/pkg/kinflate/configmapandsecret/util"
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"k8s.io/kubectl/pkg/loader"
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)
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// NewFromConfigMap returns a Resource given a configmap metadata from manifest file.
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func NewFromConfigMap(cm manifest.ConfigMap, l loader.Loader) (*Resource, error) {
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corev1CM, err := makeConfigMap(cm, l)
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if err != nil {
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return nil, err
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}
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data, err := objectToUnstructured(corev1CM)
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if err != nil {
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return nil, err
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}
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return &Resource{Data: data}, nil
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}
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func makeConfigMap(cm manifest.ConfigMap, l loader.Loader) (*corev1.ConfigMap, error) {
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var envPairs, literalPairs, filePairs []kvPair
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var err error
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corev1cm := &corev1.ConfigMap{}
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corev1cm.APIVersion = "v1"
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corev1cm.Kind = "ConfigMap"
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corev1cm.Name = cm.Name
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corev1cm.Data = map[string]string{}
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if cm.EnvSource != "" {
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envPairs, err = keyValuesFromEnvFile(l, cm.EnvSource)
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if err != nil {
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return nil, fmt.Errorf("error reading keys from env source file: %s %v", cm.EnvSource, err)
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}
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}
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literalPairs, err = keyValuesFromLiteralSources(cm.LiteralSources)
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if err != nil {
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return nil, fmt.Errorf("error reading key values from literal sources: %v", err)
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}
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filePairs, err = keyValuesFromFileSources(l, cm.FileSources)
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if err != nil {
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return nil, fmt.Errorf("error reading key values from file sources: %v", err)
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}
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allPairs := append(append(envPairs, literalPairs...), filePairs...)
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// merge key value pairs from all the sources
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for _, kv := range allPairs {
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err = addKV(corev1cm.Data, kv)
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if err != nil {
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return nil, fmt.Errorf("error adding key in configmap: %v", err)
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}
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}
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return corev1cm, nil
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}
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func keyValuesFromEnvFile(l loader.Loader, path string) ([]kvPair, error) {
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content, err := l.Load(path)
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if err != nil {
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return nil, err
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}
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return keyValuesFromLines(content)
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}
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func keyValuesFromLiteralSources(sources []string) ([]kvPair, error) {
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var kvs []kvPair
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for _, s := range sources {
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// TODO: move ParseLiteralSource in this file
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k, v, err := cutil.ParseLiteralSource(s)
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if err != nil {
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return nil, err
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}
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kvs = append(kvs, kvPair{key: k, value: v})
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}
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return kvs, nil
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}
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func keyValuesFromFileSources(l loader.Loader, sources []string) ([]kvPair, error) {
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var kvs []kvPair
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for _, s := range sources {
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key, path, err := cutil.ParseFileSource(s)
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if err != nil {
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return nil, err
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}
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fileContent, err := l.Load(path)
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if err != nil {
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return nil, err
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}
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kvs = append(kvs, kvPair{key: key, value: string(fileContent)})
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}
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return kvs, nil
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}
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// addKV adds key-value pair to the provided map.
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func addKV(m map[string]string, kv kvPair) error {
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if errs := validation.IsConfigMapKey(kv.key); len(errs) != 0 {
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return fmt.Errorf("%q is not a valid key name: %s", kv.key, strings.Join(errs, ";"))
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}
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if _, exists := m[kv.key]; exists {
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return fmt.Errorf("key %s already exists: %v.", kv.key, m)
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}
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m[kv.key] = kv.value
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return nil
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}
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