139 lines
3.7 KiB
Go
139 lines
3.7 KiB
Go
/*
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Copyright 2017 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 kinflate
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import (
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"path"
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"github.com/ghodss/yaml"
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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime"
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manifest "k8s.io/kubectl/pkg/apis/manifest/v1alpha1"
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)
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const kubeManifestFileName = "Kube-manifest.yaml"
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type resource struct {
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resources []string
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configmaps []manifest.ConfigMap
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secrets []manifest.Secret
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}
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type newNameObject struct {
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newName string
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obj runtime.Object
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}
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// loadBaseAndOverlayPkg returns:
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// - List of FilenameOptions, each FilenameOptions contains all the files and whether recursive for each base defined in overlay kube-manifest.yaml.
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// - Fileoptions for overlay.
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// - Package object for overlay.
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// - A potential error.
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func loadBaseAndOverlayPkg(f string) ([]*resource, *resource, *manifest.Manifest, error) {
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overlay, err := loadManifestPkg(path.Join(f, kubeManifestFileName))
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if err != nil {
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return nil, nil, nil, err
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}
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// TODO: support `recursive` when we figure out what its behavior should be.
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// Recursive: overlay.Recursive
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overlayResource := adjustPathsForConfigMapAndSecret(overlay, []string{f})
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overlayResource.resources, err = adjustPaths(overlay.Patches, []string{f})
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if err != nil {
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return nil, nil, nil, err
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}
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if len(overlay.Resources) == 0 {
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return nil, nil, nil, errors.New("expect at least one base, but got 0")
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}
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var baseResources []*resource
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for _, base := range overlay.Resources {
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baseManifest, err := loadManifestPkg(path.Join(f, base, kubeManifestFileName))
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if err != nil {
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return nil, nil, nil, err
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}
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baseResource := adjustPathsForConfigMapAndSecret(baseManifest, []string{f, base})
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baseResource.resources, err = adjustPaths(baseManifest.Resources, []string{f, base})
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if err != nil {
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return nil, nil, nil, err
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}
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baseResources = append(baseResources, baseResource)
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}
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return baseResources, overlayResource, overlay, nil
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}
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// loadManifestPkg loads a manifest file and parse it in to the Package object.
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func loadManifestPkg(filename string) (*manifest.Manifest, error) {
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bytes, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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var pkg manifest.Manifest
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// TODO: support json
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err = yaml.Unmarshal(bytes, &pkg)
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return &pkg, err
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}
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func populateResourceMap(files []string, m map[groupVersionKindName][]byte, errOut io.Writer) error {
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decoder := unstructured.UnstructuredJSONScheme
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for _, file := range files {
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content, err := ioutil.ReadFile(file)
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if err != nil {
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return err
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}
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// try converting to json, if there is a error, probably because the content is already json.
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jsoncontent, err := yaml.YAMLToJSON(content)
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if err != nil {
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fmt.Fprintf(errOut, "error when trying to convert yaml to json: %v\n", err)
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} else {
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content = jsoncontent
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}
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obj, gvk, err := decoder.Decode(content, nil, nil)
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if err != nil {
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return err
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}
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accessor, err := meta.Accessor(obj)
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if err != nil {
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return err
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}
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name := accessor.GetName()
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gvkn := groupVersionKindName{gvk: *gvk, name: name}
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if err != nil {
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return err
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}
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if _, found := m[gvkn]; found {
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return fmt.Errorf("unexpected same groupVersionKindName: %#v", gvkn)
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}
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m[gvkn] = content
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}
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return nil
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}
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