mirror of
https://github.com/kubernetes-sigs/kustomize.git
synced 2026-05-22 23:07:00 +00:00
115 lines
3.0 KiB
Go
115 lines
3.0 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 config
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import (
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"log"
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"github.com/ghodss/yaml"
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"sigs.k8s.io/kustomize/pkg/ifc"
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)
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// Factory makes instances of TransformerConfig.
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type Factory struct {
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ldr ifc.Loader
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}
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// TODO(#606): Setting this to false satisfies the feature
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// request in 606. The todo is to delete the non-active
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// code path in a subsequent PR.
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const demandExplicitConfig = false
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func MakeTransformerConfig(
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ldr ifc.Loader, paths []string) (*TransformerConfig, error) {
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if demandExplicitConfig {
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return loadConfigFromDiskOrDefaults(ldr, paths)
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}
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return mergeCustomConfigWithDefaults(ldr, paths)
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}
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// loadConfigFromDiskOrDefaults returns a TransformerConfig object
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// built from either files or the hardcoded default configs.
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// There's no merging, it's one or the other. This is preferred
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// if one wants all configuration to be explicit in version
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// control, as opposed to relying on a mix of files and
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// hard-coded config.
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func loadConfigFromDiskOrDefaults(
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ldr ifc.Loader, paths []string) (*TransformerConfig, error) {
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if paths == nil || len(paths) == 0 {
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return MakeDefaultConfig(), nil
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}
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return NewFactory(ldr).FromFiles(paths)
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}
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// mergeCustomConfigWithDefaults returns a merger of custom config,
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// if any, with default config.
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func mergeCustomConfigWithDefaults(
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ldr ifc.Loader, paths []string) (*TransformerConfig, error) {
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t1 := MakeDefaultConfig()
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if len(paths) == 0 {
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return t1, nil
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}
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t2, err := NewFactory(ldr).FromFiles(paths)
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if err != nil {
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return nil, err
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}
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return t1.Merge(t2)
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}
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func NewFactory(l ifc.Loader) *Factory {
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return &Factory{ldr: l}
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}
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func (tf *Factory) loader() ifc.Loader {
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if tf.ldr.(ifc.Loader) == nil {
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log.Fatal("no loader")
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}
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return tf.ldr
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}
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// FromFiles returns a TranformerConfig object from a list of files
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func (tf *Factory) FromFiles(
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paths []string) (*TransformerConfig, error) {
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result := &TransformerConfig{}
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for _, path := range paths {
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data, err := tf.loader().Load(path)
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if err != nil {
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return nil, err
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}
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t, err := makeTransformerConfigFromBytes(data)
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if err != nil {
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return nil, err
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}
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result, err = result.Merge(t)
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if err != nil {
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return nil, err
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}
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}
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return result, nil
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}
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// makeTransformerConfigFromBytes returns a TransformerConfig object from bytes
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func makeTransformerConfigFromBytes(data []byte) (*TransformerConfig, error) {
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var t TransformerConfig
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err := yaml.Unmarshal(data, &t)
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if err != nil {
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return nil, err
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}
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t.sortFields()
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return &t, nil
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}
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