1 files changed, 43 insertions, 0 deletions
diff --git a/gopls/internal/lsp/debug/log/log.go b/gopls/internal/lsp/debug/log/log.go
new file mode 100644
index 000000000..e3eaa106f
--- /dev/null
+++ b/gopls/internal/lsp/debug/log/log.go
@@ -0,0 +1,43 @@
+// Copyright 2020 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 log provides helper methods for exporting log events to the
+// internal/event package.
+package log
+
+import (
+	"context"
+	"fmt"
+
+	"golang.org/x/tools/internal/event"
+	"golang.org/x/tools/internal/event/label"
+	"golang.org/x/tools/internal/event/tag"
+)
+
+// Level parameterizes log severity.
+type Level int
+
+const (
+	_ Level = iota
+	Error
+	Warning
+	Info
+	Debug
+	Trace
+)
+
+// Log exports a log event labeled with level l.
+func (l Level) Log(ctx context.Context, msg string) {
+	event.Log(ctx, msg, tag.Level.Of(int(l)))
+}
+
+// Logf formats and exports a log event labeled with level l.
+func (l Level) Logf(ctx context.Context, format string, args ...interface{}) {
+	l.Log(ctx, fmt.Sprintf(format, args...))
+}
+
+// LabeledLevel extracts the labeled log l
+func LabeledLevel(lm label.Map) Level {
+	return Level(tag.Level.Get(lm))
+}