74 lines
1.2 KiB
Go
74 lines
1.2 KiB
Go
package test
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import (
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"bufio"
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"bytes"
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"io"
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k8syaml "k8s.io/apimachinery/pkg/util/yaml"
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)
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const maxExecutiveEmpties = 100
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// Scanner scans a yaml manifest file for manifest tokens delimited by "---".
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// See bufio.Scanner for semantics.
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type Scanner struct {
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reader *k8syaml.YAMLReader
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token []byte // Last token returned by split.
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err error // Sticky error.
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empties int // Count of successive empty tokens.
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done bool // Scan has finished.
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}
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func NewYAMLScanner(b []byte) *Scanner {
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r := bufio.NewReader(bytes.NewBuffer(b))
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return &Scanner{reader: k8syaml.NewYAMLReader(r)}
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}
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func (s *Scanner) Err() error {
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if s.err == io.EOF {
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return nil
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}
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return s.err
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}
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func (s *Scanner) Scan() bool {
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if s.done {
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return false
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}
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var (
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tok []byte
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err error
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)
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for {
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tok, err = s.reader.Read()
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if err != nil {
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if err == io.EOF {
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s.done = true
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}
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s.err = err
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return false
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}
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if len(bytes.TrimSpace(tok)) == 0 {
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s.empties++
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if s.empties > maxExecutiveEmpties {
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panic("yaml.Scan: too many empty tokens without progressing")
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}
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continue
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}
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s.empties = 0
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s.token = tok
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return true
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}
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}
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func (s *Scanner) Text() string {
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return string(s.token)
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}
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func (s *Scanner) Bytes() []byte {
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return s.token
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}
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