Suggested changes

kyaml/yaml/alias.go

@@ -11,19 +11,19 @@ import (
 )
 
 const (
-	WideSeqIndent    SeqIndentType = "wide"
-	CompactSeqIndent SeqIndentType = "compact"
-	DefaultIndent                  = 2
+	WideSequenceStyle    SequenceIndentStyle = "wide"
+	CompactSequenceStyle SequenceIndentStyle = "compact"
+	DefaultIndent                            = 2
 )
 
 // SeqIndentType holds the indentation style for sequence nodes
-type SeqIndentType string
+type SequenceIndentStyle string
 
 // EncoderOptions are options that can be used to configure the encoder,
 // do not expose new options without considerable justification
 type EncoderOptions struct {
 	// SeqIndent is the indentation style for YAML Sequence nodes
-	SeqIndent SeqIndentType
+	SeqIndent SequenceIndentStyle
 }
 
 // Expose the yaml.v3 functions so this package can be used as a replacement
@@ -69,7 +69,7 @@ func MarshalWithOptions(in interface{}, opts *EncoderOptions) ([]byte, error) {
 func NewEncoderWithOptions(w io.Writer, opts *EncoderOptions) *yaml.Encoder {
 	encoder := NewEncoder(w)
 	encoder.SetIndent(DefaultIndent)
-	if opts.SeqIndent == WideSeqIndent {
+	if opts.SeqIndent == WideSequenceStyle {
 		encoder.DefaultSeqIndent()
 	} else {
 		encoder.CompactSeqIndent()

kyaml/yaml/util.go

@@ -29,20 +29,21 @@ func DeriveSeqIndentStyle(originalYAML string) string {
 
 		numSpacesBeforeKeyElem := len(keyLine) - len(strings.TrimLeft(keyLine, " "))
 		trimmedKeyLine := strings.Trim(keyLine, " ")
-		if strings.HasSuffix(trimmedKeyLine, "|") || strings.HasSuffix(trimmedKeyLine, "|-") {
+		if strings.Count(trimmedKeyLine, ":") != 1 || !strings.HasSuffix(trimmedKeyLine, ":") {
+			// if the key line doesn't contain only one : that too at the end,
 			// this is not a sequence node, it is a wrapped sequence node string
 			// ignore it
 			continue
 		}
 
 		if numSpacesBeforeSeqElem == numSpacesBeforeKeyElem {
-			return string(CompactSeqIndent)
+			return string(CompactSequenceStyle)
 		}
 
 		if numSpacesBeforeSeqElem-numSpacesBeforeKeyElem == 2 {
-			return string(WideSeqIndent)
+			return string(WideSequenceStyle)
 		}
 	}
 
-	return string(CompactSeqIndent)
+	return string(CompactSequenceStyle)
 }

kyaml/yaml/util_test.go

@@ -79,16 +79,42 @@ env:
 			expectedOutput: `compact`,
 		},
 		{
-			name: "skip wrapped sequence strings",
+			name: "skip wrapped sequence strings, pipe hyphen",
 			input: `apiVersion: apps/v1
 kind: Deployment
 spec: |-
   - foo
   - bar
-env:
-- foo
-- bar
-- baz
+`,
+			expectedOutput: `compact`,
+		},
+		{
+			name: "skip wrapped sequence strings, pipe",
+			input: `apiVersion: apps/v1
+kind: Deployment
+spec: |
+  - foo
+  - bar
+`,
+			expectedOutput: `compact`,
+		},
+		{
+			name: "skip wrapped sequence strings, right angle bracket",
+			input: `apiVersion: apps/v1
+kind: Deployment
+spec: >
+  - foo
+  - bar
+`,
+			expectedOutput: `compact`,
+		},
+		{
+			name: "skip wrapped sequence strings, plus",
+			input: `apiVersion: apps/v1
+kind: Deployment
+spec: +
+  - foo
+  - bar
 `,
 			expectedOutput: `compact`,
 		},