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65e3620a7a
Change-Id: I5de33edc352a5202fdf9e38538a224dd6adafedb Reviewed-on: https://go-review.googlesource.com/c/tools/+/190799 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org> Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
39 lines
1.1 KiB
Go
39 lines
1.1 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package export
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import (
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"context"
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"fmt"
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"io"
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"golang.org/x/tools/internal/telemetry"
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)
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// LogWriter returns an observer that logs events to the supplied writer.
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// If onlyErrors is true it does not log any event that did not have an
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// associated error.
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// It ignores all telemetry other than log events.
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func LogWriter(w io.Writer, onlyErrors bool) Exporter {
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return &logWriter{writer: w, onlyErrors: onlyErrors}
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}
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type logWriter struct {
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writer io.Writer
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onlyErrors bool
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}
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func (w *logWriter) StartSpan(context.Context, *telemetry.Span) {}
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func (w *logWriter) FinishSpan(context.Context, *telemetry.Span) {}
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func (w *logWriter) Log(ctx context.Context, event telemetry.Event) {
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if event.Error == nil {
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// we only log errors by default
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return
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}
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fmt.Fprintf(w.writer, "%v\n", event)
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}
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func (w *logWriter) Metric(context.Context, telemetry.MetricData) {}
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func (w *logWriter) Flush() {}
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