From 2ea20636251ca85af6125620d4acc138978555c3 Mon Sep 17 00:00:00 2001
From: Senyo Simpson <simpsonsenyo@gmail.com>
Date: Fri, 26 Apr 2024 14:56:43 +0200
Subject: [PATCH] add support for slog logger

---
 log/slog/slog.go | 84 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 log/slog/slog.go

diff --git a/log/slog/slog.go b/log/slog/slog.go
new file mode 100644
index 000000000..76319f1fc
--- /dev/null
+++ b/log/slog/slog.go
@@ -0,0 +1,84 @@
+package slog
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+
+	"github.com/virtual-kubelet/virtual-kubelet/log"
+)
+
+// Ensure log.Logger is fully implemented during compile time.
+var _ log.Logger = (*adapter)(nil)
+
+const LevelFatal = slog.Level(12)
+
+type adapter struct {
+	inner *slog.Logger
+}
+
+func (l *adapter) Debug(args ...interface{}) {
+	msg := args[0].(string)
+	l.inner.Debug(msg)
+}
+
+func (l *adapter) Debugf(format string, args ...interface{}) {
+	formattedArgs := fmt.Sprintf(format, args...)
+	l.inner.Debug(formattedArgs)
+}
+
+func (l *adapter) Info(args ...interface{}) {
+	msg := args[0].(string)
+	l.inner.Info(msg)
+}
+
+func (l *adapter) Infof(format string, args ...interface{}) {
+	formattedArgs := fmt.Sprintf(format, args...)
+	l.inner.Info(formattedArgs)
+}
+
+func (l *adapter) Warn(args ...interface{}) {
+	msg := args[0].(string)
+	l.inner.Warn(msg)
+}
+
+func (l *adapter) Warnf(format string, args ...interface{}) {
+	formattedArgs := fmt.Sprintf(format, args...)
+	l.inner.Warn(formattedArgs)
+}
+
+func (l *adapter) Error(args ...interface{}) {
+	msg := args[0].(string)
+	l.inner.Error(msg)
+}
+
+func (l *adapter) Errorf(format string, args ...interface{}) {
+	formattedArgs := fmt.Sprintf(format, args...)
+	l.inner.Error(formattedArgs)
+}
+
+func (l *adapter) Fatal(args ...interface{}) {
+	msg := args[0].(string)
+	l.inner.Log(context.Background(), LevelFatal, msg)
+}
+
+func (l *adapter) Fatalf(format string, args ...interface{}) {
+	formattedArgs := fmt.Sprintf(format, args...)
+	l.inner.Log(context.Background(), LevelFatal, formattedArgs)
+}
+
+func (l *adapter) WithField(key string, val interface{}) log.Logger {
+	return &adapter{inner: l.inner.With(key, val)}
+}
+
+func (l *adapter) WithFields(f log.Fields) log.Logger {
+	logger := l.inner
+	for k, v := range f {
+		logger = logger.With(k, v)
+	}
+	return &adapter{inner: logger}
+}
+
+func (l *adapter) WithError(err error) log.Logger {
+	return &adapter{inner: l.inner.With("error", err)}
+}