log-file param added

.gitignore

@@ -1,4 +1,5 @@
 .idea
 .indihub-agent
 indihub.json
+*.log
 bin/

main.go

@@ -43,6 +43,7 @@ var (
 	flagAPIPort               uint64
 	flagAPIOrigins            string
 	flagMode                  string
+	flagLogFile               string
 
 	indiServerAddr string
 
@@ -123,11 +124,27 @@ robotic - equipment sharing is not possible, your equipment is controlled by IND
 		"",
 		"comma-separated list of origins allowed to connect to API-server",
 	)
+	flag.StringVar(
+		&flagLogFile,
+		"log-file",
+		"",
+		"path to log file (STDOUT by default)",
+	)
 }
 
 func main() {
 	flag.Parse()
 
+	if flagLogFile != "" {
+		// redirect log output to file
+		logFile, err := os.OpenFile(flagLogFile, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
+		if err != nil {
+			log.Fatalf("error opening log file '%s': %s\n", flagLogFile, err)
+		}
+		defer logFile.Close()
+		log.SetOutput(logFile)
+	}
+
 	if flagMode != lib.ModeSolo && flagMode != lib.ModeShare && flagMode != lib.ModeRobotic {
 		log.Fatalf("Unknown mode '%s' provided\n", flagMode)
 	}

version/version.go

@@ -10,9 +10,9 @@ var AgentVersion = "1.0.4"
 
 func CheckAgentVersion(latestVer string) {
 	log.Println("Current agent version:", AgentVersion)
-	log.Println("Latest agent version:", latestVer)
 
 	if AgentVersion < latestVer {
+		log.Println("Latest agent version:", latestVer)
 		yc := color.New(color.FgYellow)
 		yc.Println()
 		yc.Println("                                ************************************************************")