mirror of https://github.com/mikefarah/yq.git
71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
package yqlib
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import (
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"encoding/csv"
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"fmt"
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"io"
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yaml "gopkg.in/yaml.v3"
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)
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type csvEncoder struct {
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separator rune
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}
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func NewCsvEncoder(separator rune) Encoder {
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return &csvEncoder{separator}
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}
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func (e *csvEncoder) CanHandleAliases() bool {
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return false
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}
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func (e *csvEncoder) PrintDocumentSeparator(writer io.Writer) error {
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return nil
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}
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func (e *csvEncoder) PrintLeadingContent(writer io.Writer, content string) error {
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return nil
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}
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func (e *csvEncoder) encodeRow(csvWriter *csv.Writer, contents []*yaml.Node) error {
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stringValues := make([]string, len(contents))
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for i, child := range contents {
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if child.Kind != yaml.ScalarNode {
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return fmt.Errorf("csv encoding only works for arrays of scalars (string/numbers/booleans), child[%v] is a %v", i, child.Tag)
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}
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stringValues[i] = child.Value
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}
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return csvWriter.Write(stringValues)
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}
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func (e *csvEncoder) Encode(writer io.Writer, originalNode *yaml.Node) error {
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csvWriter := csv.NewWriter(writer)
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csvWriter.Comma = e.separator
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// node must be a sequence
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node := unwrapDoc(originalNode)
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if node.Kind != yaml.SequenceNode {
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return fmt.Errorf("csv encoding only works for arrays, got: %v", node.Tag)
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} else if len(node.Content) == 0 {
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return nil
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}
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if node.Content[0].Kind == yaml.ScalarNode {
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return e.encodeRow(csvWriter, node.Content)
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}
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for i, child := range node.Content {
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if child.Kind != yaml.SequenceNode {
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return fmt.Errorf("csv encoding only works for arrays of scalars (string/numbers/booleans), child[%v] is a %v", i, child.Tag)
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}
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err := e.encodeRow(csvWriter, child.Content)
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if err != nil {
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return err
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}
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}
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return nil
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}
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