Fix building on Windows (#2008)

Signed-off-by: Till Faelligen <tfaelligen@gmail.com>

internal/log_windows.go

@@ -0,0 +1,48 @@
+// Copyright 2021 The Matrix.org Foundation C.I.C.
+//
+// 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.
+
+package internal
+
+import (
+	"github.com/matrix-org/dendrite/setup/config"
+	"github.com/sirupsen/logrus"
+)
+
+// SetupHookLogging configures the logging hooks defined in the configuration.
+// If something fails here it means that the logging was improperly configured,
+// so we just exit with the error
+func SetupHookLogging(hooks []config.LogrusHook, componentName string) {
+	logrus.SetReportCaller(true)
+	for _, hook := range hooks {
+		// Check we received a proper logging level
+		level, err := logrus.ParseLevel(hook.Level)
+		if err != nil {
+			logrus.Fatalf("Unrecognised logging level %s: %q", hook.Level, err)
+		}
+
+		// Perform a first filter on the logs according to the lowest level of all
+		// (Eg: If we have hook for info and above, prevent logrus from processing debug logs)
+		if logrus.GetLevel() < level {
+			logrus.SetLevel(level)
+		}
+
+		switch hook.Type {
+		case "file":
+			checkFileHookParams(hook.Params)
+			setupFileHook(hook, level, componentName)
+		default:
+			logrus.Fatalf("Unrecognised logging hook type: %s", hook.Type)
+		}
+	}
+}