+++ /dev/null
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package export
-
-import (
- "context"
- "fmt"
- "io"
- "sync"
-
- "golang.org/x/tools/internal/event"
- "golang.org/x/tools/internal/event/core"
- "golang.org/x/tools/internal/event/label"
-)
-
-// LogWriter returns an Exporter that logs events to the supplied writer.
-// If onlyErrors is true it does not log any event that did not have an
-// associated error.
-// It ignores all telemetry other than log events.
-func LogWriter(w io.Writer, onlyErrors bool) event.Exporter {
- lw := &logWriter{writer: w, onlyErrors: onlyErrors}
- return lw.ProcessEvent
-}
-
-type logWriter struct {
- mu sync.Mutex
- printer Printer
- writer io.Writer
- onlyErrors bool
-}
-
-func (w *logWriter) ProcessEvent(ctx context.Context, ev core.Event, lm label.Map) context.Context {
- switch {
- case event.IsLog(ev):
- if w.onlyErrors && !event.IsError(ev) {
- return ctx
- }
- w.mu.Lock()
- defer w.mu.Unlock()
- w.printer.WriteEvent(w.writer, ev, lm)
-
- case event.IsStart(ev):
- if span := GetSpan(ctx); span != nil {
- fmt.Fprintf(w.writer, "start: %v %v", span.Name, span.ID)
- if span.ParentID.IsValid() {
- fmt.Fprintf(w.writer, "[%v]", span.ParentID)
- }
- }
- case event.IsEnd(ev):
- if span := GetSpan(ctx); span != nil {
- fmt.Fprintf(w.writer, "finish: %v %v", span.Name, span.ID)
- }
- }
- return ctx
-}