binary data nope

api/internal/generators/utils.go

@@ -0,0 +1,139 @@
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package generators
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/go-errors/errors"
+	"sigs.k8s.io/kustomize/api/filters/filtersutil"
+	"sigs.k8s.io/kustomize/api/ifc"
+	"sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+func makeBaseNode(kind, name, namespace string) (*yaml.RNode, error) {
+	rn, err := yaml.Parse(fmt.Sprintf(`
+apiVersion: v1
+kind: %s
+`, kind))
+	if err != nil {
+		return nil, err
+	}
+	if name == "" {
+		return nil, errors.Errorf("a configmap must have a name")
+	}
+	if _, err := rn.Pipe(yaml.SetK8sName(name)); err != nil {
+		return nil, err
+	}
+	if namespace != "" {
+		if _, err := rn.Pipe(yaml.SetK8sNamespace(namespace)); err != nil {
+			return nil, err
+		}
+	}
+	return rn, nil
+}
+
+func makeValidatedDataMap(
+	ldr ifc.KvLoader, name string, sources types.KvPairSources) (map[string]string, error) {
+	pairs, err := ldr.Load(sources)
+	if err != nil {
+		return nil, errors.WrapPrefix(err, "loading KV pairs", 0)
+	}
+	knownKeys := make(map[string]string)
+	for _, p := range pairs {
+		// legal key: alphanumeric characters, '-', '_' or '.'
+		if err := ldr.Validator().ErrIfInvalidKey(p.Key); err != nil {
+			return nil, err
+		}
+		if _, ok := knownKeys[p.Key]; ok {
+			return nil, errors.Errorf(
+				"configmap %s illegally repeats the key `%s`", name, p.Key)
+		}
+		knownKeys[p.Key] = p.Value
+	}
+	return knownKeys, nil
+}
+
+// copyLabelsAndAnnotations copies labels and annotations from
+// GeneratorOptions into the given object.
+func copyLabelsAndAnnotations(
+	rn *yaml.RNode, opts *types.GeneratorOptions) error {
+	if opts == nil {
+		return nil
+	}
+	for _, k := range filtersutil.SortedMapKeys(opts.Labels) {
+		v := opts.Labels[k]
+		if _, err := rn.Pipe(yaml.SetLabel(k, v)); err != nil {
+			return err
+		}
+	}
+	for _, k := range filtersutil.SortedMapKeys(opts.Annotations) {
+		v := opts.Annotations[k]
+		if _, err := rn.Pipe(yaml.SetAnnotation(k, v)); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// In a secret, all data is base64 encoded, regardless of its conformance
+// or lack thereof to UTF-8.
+func makeSecretValueRNode(s string) *yaml.RNode {
+	yN := &yaml.Node{Kind: yaml.ScalarNode}
+	// Purposely don't use YAML tags to identify the data as being plain text or
+	// binary.  It kubernetes Secrets the values in the `data` map are expected
+	// to be base64 encoded, and in ConfigMaps that same can be said for the
+	// values in the `binaryData` field.
+	yN.Tag = yaml.NodeTagString
+	yN.Value = encodeBase64(s)
+	if strings.Contains(yN.Value, "\n") {
+		yN.Style = yaml.LiteralStyle
+	}
+	return yaml.NewRNode(yN)
+}
+
+func makeConfigMapValueRNode(s string) (field string, rN *yaml.RNode) {
+	yN := &yaml.Node{Kind: yaml.ScalarNode}
+	yN.Tag = yaml.NodeTagString
+	if utf8.ValidString(s) {
+		field = yaml.DataField
+		yN.Value = s
+	} else {
+		field = yaml.BinaryDataField
+		yN.Value = encodeBase64(s)
+	}
+	if strings.Contains(yN.Value, "\n") {
+		yN.Style = yaml.LiteralStyle
+	}
+	return field, yaml.NewRNode(yN)
+}
+
+// encodeBase64 encodes s as base64 that is broken up into multiple lines
+// as appropriate for the resulting length.
+func encodeBase64(s string) string {
+	const lineLen = 70
+	encLen := base64.StdEncoding.EncodedLen(len(s))
+	lines := encLen/lineLen + 1
+	buf := make([]byte, encLen*2+lines)
+	in := buf[0:encLen]
+	out := buf[encLen:]
+	base64.StdEncoding.Encode(in, []byte(s))
+	k := 0
+	for i := 0; i < len(in); i += lineLen {
+		j := i + lineLen
+		if j > len(in) {
+			j = len(in)
+		}
+		k += copy(out[k:], in[i:j])
+		if lines > 1 {
+			out[k] = '\n'
+			k++
+		}
+	}
+	return string(out[:k])
+}