Add --memprofile flag

rclone.go

@@ -21,7 +21,8 @@ import (
 // Globals
 var (
 	// Flags
-	cpuprofile    = pflag.StringP("cpuprofile", "", "", "Write cpu profile to file")
+	cpuProfile    = pflag.StringP("cpuprofile", "", "", "Write cpu profile to file")
+	memProfile    = pflag.String("memprofile", "", "Write memory profile to file")
 	statsInterval = pflag.DurationP("stats", "", time.Minute*1, "Interval to print stats (0 to disable)")
 	version       = pflag.BoolP("version", "V", false, "Print the version number")
 	logFile       = pflag.StringP("log-file", "", "", "Log everything to this file")
@@ -282,21 +283,6 @@ func ParseFlags() {
 	pflag.Parse()
 	runtime.GOMAXPROCS(runtime.NumCPU())
 	fs.LoadConfig()
-
-	// Setup profiling if desired
-	if *cpuprofile != "" {
-		f, err := os.Create(*cpuprofile)
-		if err != nil {
-			fs.Stats.Error()
-			log.Fatal(err)
-		}
-		err = pprof.StartCPUProfile(f)
-		if err != nil {
-			fs.Stats.Error()
-			log.Fatal(err)
-		}
-		defer pprof.StopCPUProfile()
-	}
 }
 
 // ParseCommand parses the command from the command line
@@ -391,6 +377,44 @@ func main() {
 		redirectStderr(f)
 	}
 
+	// Setup CPU profiling if desired
+	if *cpuProfile != "" {
+		log.Printf("Creating CPU profile %q\n", *cpuProfile)
+		f, err := os.Create(*cpuProfile)
+		if err != nil {
+			fs.Stats.Error()
+			log.Fatal(err)
+		}
+		err = pprof.StartCPUProfile(f)
+		if err != nil {
+			fs.Stats.Error()
+			log.Fatal(err)
+		}
+		defer pprof.StopCPUProfile()
+	}
+
+	// Setup memory profiling if desired
+	if *memProfile != "" {
+		defer func() {
+			log.Printf("Saving Memory profile %q\n", *memProfile)
+			f, err := os.Create(*memProfile)
+			if err != nil {
+				fs.Stats.Error()
+				log.Fatal(err)
+			}
+			err = pprof.WriteHeapProfile(f)
+			if err != nil {
+				fs.Stats.Error()
+				log.Fatal(err)
+			}
+			err = f.Close()
+			if err != nil {
+				fs.Stats.Error()
+				log.Fatal(err)
+			}
+		}()
+	}
+
 	// Make source and destination fs
 	var fdst, fsrc fs.Fs
 	if len(args) >= 1 {
@@ -407,8 +431,12 @@ func main() {
 		StartStats()
 	}
 
+	// Exit if no command to run
+	if command.Run == nil {
+		return
+	}
+
 	// Run the actual command
-	if command.Run != nil {
 	var err error
 	for try := 1; try <= *retries; try++ {
 		err = command.Run(fdst, fsrc)
@@ -436,8 +464,4 @@ func main() {
 	if fs.Stats.Errored() {
 		os.Exit(1)
 	}
-		os.Exit(0)
-	} else {
-	}
-
 }