chore: vendor

vendor/go.opentelemetry.io/otel/internal/global/internal_logging.go

@@ -0,0 +1,62 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package global // import "go.opentelemetry.io/otel/internal/global"
+
+import (
+	"log"
+	"os"
+	"sync/atomic"
+
+	"github.com/go-logr/logr"
+	"github.com/go-logr/stdr"
+)
+
+// globalLogger holds a reference to the [logr.Logger] used within
+// go.opentelemetry.io/otel.
+//
+// The default logger uses stdr which is backed by the standard `log.Logger`
+// interface. This logger will only show messages at the Error Level.
+var globalLogger = func() *atomic.Pointer[logr.Logger] {
+	l := stdr.New(log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile))
+
+	p := new(atomic.Pointer[logr.Logger])
+	p.Store(&l)
+	return p
+}()
+
+// SetLogger sets the global Logger to l.
+//
+// To see Warn messages use a logger with `l.V(1).Enabled() == true`
+// To see Info messages use a logger with `l.V(4).Enabled() == true`
+// To see Debug messages use a logger with `l.V(8).Enabled() == true`.
+func SetLogger(l logr.Logger) {
+	globalLogger.Store(&l)
+}
+
+// GetLogger returns the global logger.
+func GetLogger() logr.Logger {
+	return *globalLogger.Load()
+}
+
+// Info prints messages about the general state of the API or SDK.
+// This should usually be less than 5 messages a minute.
+func Info(msg string, keysAndValues ...interface{}) {
+	GetLogger().V(4).Info(msg, keysAndValues...)
+}
+
+// Error prints messages about exceptional states of the API or SDK.
+func Error(err error, msg string, keysAndValues ...interface{}) {
+	GetLogger().Error(err, msg, keysAndValues...)
+}
+
+// Debug prints messages about all internal changes in the API or SDK.
+func Debug(msg string, keysAndValues ...interface{}) {
+	GetLogger().V(8).Info(msg, keysAndValues...)
+}
+
+// Warn prints messages about warnings in the API or SDK.
+// Not an error but is likely more important than an informational event.
+func Warn(msg string, keysAndValues ...interface{}) {
+	GetLogger().V(1).Info(msg, keysAndValues...)
+}