github.com/GoogleContainerTools/skaffold@v1.39.18/pkg/skaffold/deploy/helm/parse.go (about)

     1  /*
     2  Copyright 2020 The Skaffold Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package helm
    18  
    19  import (
    20  	"bufio"
    21  	"bytes"
    22  	"context"
    23  	"fmt"
    24  	"io"
    25  
    26  	k8syaml "k8s.io/apimachinery/pkg/util/yaml"
    27  	"k8s.io/client-go/kubernetes/scheme"
    28  
    29  	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/deploy/types"
    30  	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/kubernetes/manifest"
    31  	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/output/log"
    32  )
    33  
    34  // parseReleaseManifests parses a set of Kubernetes manifests extracting a set of
    35  // objects with their corresponding namespace.  If no namespace is specified,
    36  // then assume `namespace`.
    37  func parseReleaseManifests(namespace string, b *bufio.Reader) []types.Artifact {
    38  	var results []types.Artifact
    39  
    40  	r := k8syaml.NewYAMLReader(b)
    41  	for i := 0; ; i++ {
    42  		doc, err := r.Read()
    43  		if err == io.EOF {
    44  			break
    45  		}
    46  		if err != nil {
    47  			log.Entry(context.TODO()).Infof("error parsing object %d from string: %s", i, err.Error())
    48  			continue
    49  		}
    50  		objNamespace, err := getObjectNamespaceIfDefined(doc, namespace)
    51  		if err != nil {
    52  			log.Entry(context.TODO()).Infof("error parsing object %d from string: %s", i, err.Error())
    53  			continue
    54  		}
    55  		obj, err := parseRuntimeObject(objNamespace, doc)
    56  		if err != nil {
    57  			log.Entry(context.TODO()).Infof("error parsing object %d from string: %s", i, err.Error())
    58  		} else {
    59  			results = append(results, *obj)
    60  			log.Entry(context.TODO()).Debugf("found deployed object %d: %+v", i, obj.Obj)
    61  		}
    62  	}
    63  
    64  	return results
    65  }
    66  
    67  func parseRuntimeObject(namespace string, b []byte) (*types.Artifact, error) {
    68  	d := scheme.Codecs.UniversalDeserializer()
    69  	obj, _, err := d.Decode(b, nil, nil)
    70  	if err != nil {
    71  		return nil, fmt.Errorf("error decoding parsed yaml: %s", err.Error())
    72  	}
    73  	return &types.Artifact{
    74  		Obj:       obj,
    75  		Namespace: namespace,
    76  	}, nil
    77  }
    78  
    79  func getObjectNamespaceIfDefined(doc []byte, ns string) (string, error) {
    80  	if i := bytes.Index(doc, []byte("apiVersion")); i >= 0 {
    81  		manifests := manifest.ManifestList{doc[i:]}
    82  		namespaces, err := manifests.CollectNamespaces()
    83  		if err != nil {
    84  			return ns, err
    85  		}
    86  		if len(namespaces) > 0 {
    87  			return namespaces[0], nil
    88  		}
    89  	}
    90  	return ns, nil
    91  }