chore: move exporter binary to cmd package (#1768)

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>

internal/windowsservice/log.go

@@ -0,0 +1,44 @@
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build windows
+
+package windowsservice
+
+import (
+	"fmt"
+
+	wineventlog "github.com/prometheus-community/windows_exporter/internal/log/eventlog"
+	"golang.org/x/sys/windows"
+	"golang.org/x/sys/windows/svc/eventlog"
+)
+
+// logToEventToLog logs a message to the Windows event log.
+func logToEventToLog(eType uint16, msg string) error {
+	eventLog, err := eventlog.Open("windows_exporter")
+	if err != nil {
+		return fmt.Errorf("failed to open event log: %w", err)
+	}
+	defer func(eventLog *eventlog.Log) {
+		_ = eventLog.Close()
+	}(eventLog)
+
+	p, err := windows.UTF16PtrFromString(msg)
+	if err != nil {
+		return fmt.Errorf("error convert string to UTF-16: %w", err)
+	}
+
+	ss := []*uint16{p, nil, nil, nil, nil, nil, nil, nil, nil}
+
+	return windows.ReportEvent(eventLog.Handle, eType, 0, wineventlog.NeLogOemCode, 0, 9, 0, &ss[0], nil)
+}