Allow Macaron to be set to log through to gitea.log (#5667)

* Allow Macaron to be set to log through gitea.log

Fix #4291

modules/log/log.go

@@ -154,6 +154,48 @@ type LoggerInterface interface {
 
 type loggerType func() LoggerInterface
 
+// LoggerAsWriter is a io.Writer shim around the gitea log
+type LoggerAsWriter struct {
+	level int
+}
+
+// NewLoggerAsWriter creates a Writer representation of the logger with setable log level
+func NewLoggerAsWriter(level string) *LoggerAsWriter {
+	l := &LoggerAsWriter{}
+	switch strings.ToUpper(level) {
+	case "TRACE":
+		l.level = TRACE
+	case "DEBUG":
+		l.level = DEBUG
+	case "INFO":
+		l.level = INFO
+	case "WARN":
+		l.level = WARN
+	case "ERROR":
+		l.level = ERROR
+	case "CRITICAL":
+		l.level = CRITICAL
+	case "FATAL":
+		l.level = FATAL
+	default:
+		l.level = INFO
+	}
+	return l
+}
+
+// Write implements the io.Writer interface to allow spoofing of macaron
+func (l *LoggerAsWriter) Write(p []byte) (int, error) {
+	l.Log(string(p))
+	return len(p), nil
+}
+
+// Log takes a given string and logs it at the set log-level
+func (l *LoggerAsWriter) Log(msg string) {
+	for _, logger := range loggers {
+		logger.writerMsg(0, l.level, msg)
+	}
+}
+
 var adapters = make(map[string]loggerType)
 
 // Register registers given logger provider to adapters.

modules/setting/setting.go

@@ -393,10 +393,11 @@ var (
 	LibravatarService     *libravatar.Libravatar
 
 	// Log settings
-	LogLevel    string
-	LogRootPath string
-	LogModes    []string
-	LogConfigs  []string
+	LogLevel           string
+	LogRootPath        string
+	LogModes           []string
+	LogConfigs         []string
+	RedirectMacaronLog bool
 
 	// Attachment settings
 	AttachmentPath         string
@@ -767,6 +768,7 @@ func NewContext() {
 	LogLevel = getLogLevel("log", "LEVEL", "Info")
 	LogRootPath = Cfg.Section("log").Key("ROOT_PATH").MustString(path.Join(AppWorkPath, "log"))
 	forcePathSeparator(LogRootPath)
+	RedirectMacaronLog = Cfg.Section("log").Key("REDIRECT_MACARON_LOG").MustBool(false)
 
 	sec := Cfg.Section("server")
 	AppName = Cfg.Section("").Key("APP_NAME").MustString("Gitea: Git with a cup of tea")