Add new logging

logging.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	log "github.com/cihub/seelog"
+)
+
+func init() {
+
+	SetLogLevel("debug")
+}
+
+// SetLogLevel determines the log level
+func SetLogLevel(level string) (err error) {
+
+	// https://en.wikipedia.org/wiki/ANSI_escape_code#3/4_bit
+	// https://github.com/cihub/seelog/wiki/Log-levels
+	appConfig := `
+	<seelog minlevel="` + level + `">
+	<outputs formatid="stdout">
+	<filter levels="debug,trace">
+		<console formatid="debug"/>
+	</filter>
+	<filter levels="info">
+		<console formatid="info"/>
+	</filter>
+	<filter levels="critical,error">
+		<console formatid="error"/>
+	</filter>
+	<filter levels="warn">
+		<console formatid="warn"/>
+	</filter>
+	</outputs>
+	<formats>
+		<format id="stdout"   format="%Date %Time [%LEVEL] %File %FuncShort:%Line %Msg %n" />
+		<format id="debug"   format="%Date %Time %EscM(37)[%LEVEL]%EscM(0) %File %FuncShort:%Line %Msg %n" />
+		<format id="info"    format="%EscM(36)[%LEVEL]%EscM(0) %Msg %n" />
+		<format id="warn"    format="%Date %Time %EscM(33)[%LEVEL]%EscM(0) %File %FuncShort:%Line %Msg %n" />
+		<format id="error"   format="%Date %Time %EscM(31)[%LEVEL]%EscM(0) %File %FuncShort:%Line %Msg %n" />
+	</formats>
+	</seelog>
+	`
+	logger, err := log.LoggerFromConfigAsBytes([]byte(appConfig))
+	if err != nil {
+		return
+	}
+	log.ReplaceLogger(logger)
+	return
+}