yq/pkg/yqlib/encoder_ini.go
2025-05-17 18:55:53 +10:00

114 lines
3.1 KiB
Go

//go:build !yq_noini
package yqlib
import (
"bytes"
"fmt"
"io"
"github.com/go-ini/ini"
)
type iniEncoder struct {
indentString string
}
// NewINIEncoder creates a new INI encoder
func NewINIEncoder() Encoder {
// Hardcoded indent value of 0, meaning no additional spacing.
return &iniEncoder{""}
}
// CanHandleAliases indicates whether the encoder supports aliases. INI does not support aliases.
func (ie *iniEncoder) CanHandleAliases() bool {
return false
}
// PrintDocumentSeparator is a no-op since INI does not support multiple documents.
func (ie *iniEncoder) PrintDocumentSeparator(_ io.Writer) error {
return nil
}
// PrintLeadingContent is a no-op since INI does not support leading content or comments at the encoder level.
func (ie *iniEncoder) PrintLeadingContent(_ io.Writer, _ string) error {
return nil
}
// Encode converts a CandidateNode into INI format and writes it to the provided writer.
func (ie *iniEncoder) Encode(writer io.Writer, node *CandidateNode) error {
log.Debugf("I need to encode %v", NodeToString(node))
log.Debugf("kids %v", len(node.Content))
if node.Kind == ScalarNode {
return writeStringINI(writer, node.Value+"\n")
}
// Create a new INI configuration.
cfg := ini.Empty()
if node.Kind == MappingNode {
// Default section for key-value pairs at the root level.
defaultSection, err := cfg.NewSection(ini.DefaultSection)
if err != nil {
return err
}
// Process the node's content.
for i := 0; i < len(node.Content); i += 2 {
keyNode := node.Content[i]
valueNode := node.Content[i+1]
key := keyNode.Value
switch valueNode.Kind {
case ScalarNode:
// Add key-value pair to the default section.
_, err := defaultSection.NewKey(key, valueNode.Value)
if err != nil {
return err
}
case MappingNode:
// Create a new section for nested MappingNode.
section, err := cfg.NewSection(key)
if err != nil {
return err
}
// Process nested key-value pairs.
for j := 0; j < len(valueNode.Content); j += 2 {
nestedKeyNode := valueNode.Content[j]
nestedValueNode := valueNode.Content[j+1]
if nestedValueNode.Kind == ScalarNode {
_, err := section.NewKey(nestedKeyNode.Value, nestedValueNode.Value)
if err != nil {
return err
}
} else {
log.Debugf("Skipping nested non-scalar value for key %s: %v", nestedKeyNode.Value, nestedValueNode.Kind)
}
}
default:
log.Debugf("Skipping non-scalar value for key %s: %v", key, valueNode.Kind)
}
}
} else {
return fmt.Errorf("INI encoder supports only MappingNode at the root level, got %v", node.Kind)
}
// Use a buffer to store the INI output as the library doesn't support direct io.Writer with indent.
var buffer bytes.Buffer
_, err := cfg.WriteToIndent(&buffer, ie.indentString)
if err != nil {
return err
}
// Write the buffer content to the provided writer.
_, err = writer.Write(buffer.Bytes())
return err
}
// writeStringINI is a helper function to write a string to the provided writer for INI encoder.
func writeStringINI(writer io.Writer, content string) error {
_, err := writer.Write([]byte(content))
return err
}