47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
package streamformatter // import "github.com/docker/docker/pkg/streamformatter"
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import (
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"encoding/json"
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"io"
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"github.com/docker/docker/pkg/jsonmessage"
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)
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type streamWriter struct {
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io.Writer
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lineFormat func([]byte) string
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}
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func (sw *streamWriter) Write(buf []byte) (int, error) {
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formattedBuf := sw.format(buf)
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n, err := sw.Writer.Write(formattedBuf)
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if n != len(formattedBuf) {
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return n, io.ErrShortWrite
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}
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return len(buf), err
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}
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func (sw *streamWriter) format(buf []byte) []byte {
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msg := &jsonmessage.JSONMessage{Stream: sw.lineFormat(buf)}
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b, err := json.Marshal(msg)
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if err != nil {
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return FormatError(err)
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}
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return appendNewline(b)
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}
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// NewStdoutWriter returns a writer which formats the output as json message
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// representing stdout lines
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func NewStdoutWriter(out io.Writer) io.Writer {
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return &streamWriter{Writer: out, lineFormat: func(buf []byte) string {
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return string(buf)
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}}
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}
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// NewStderrWriter returns a writer which formats the output as json message
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// representing stderr lines
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func NewStderrWriter(out io.Writer) io.Writer {
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return &streamWriter{Writer: out, lineFormat: func(buf []byte) string {
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return "\033[91m" + string(buf) + "\033[0m"
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}}
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}
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