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runner-go/pipeline/streamer.go

34 lines
837 B
Go

// Copyright 2019 Drone.IO Inc. All rights reserved.
// Use of this source code is governed by the Parity Public License
// that can be found in the LICENSE file.
package pipeline
import (
"context"
"io"
)
// A Streamer streams the pipeline logs.
type Streamer interface {
// Stream returns an io.WriteCloser to stream the stdout
// and stderr of the pipeline step.
Stream(context.Context, *State, string) io.WriteCloser
}
// NopStreamer returns a noop streamer.
func NopStreamer() Streamer {
return new(nopStreamer)
}
type nopStreamer struct{}
func (*nopStreamer) Stream(context.Context, *State, string) io.WriteCloser {
return new(nopWriteCloser)
}
type nopWriteCloser struct{}
func (*nopWriteCloser) Close() error { return nil }
func (*nopWriteCloser) Write(p []byte) (int, error) { return len(p), nil }