Rename log functions and factor into own file

fs/log.go

@@ -0,0 +1,67 @@
+// Logging for rclone
+
+package fs
+
+import (
+	"fmt"
+	"log"
+	"os"
+)
+
+// LogLevel describes rclone's logs.  These are a subset of the syslog log levels.
+type LogLevel byte
+
+// Log levels - a subset of the syslog logs
+const (
+	LogLevelEmergency = iota
+	LogLevelAlert
+	LogLevelCritical
+	LogLevelError // Error - can't be suppressed
+	LogLevelWarning
+	LogLevelNotice // Normal logging, -q suppresses
+	LogLevelInfo   // Transfers, needs -v
+	LogLevelDebug  // Debug level, needs -vv
+)
+
+// Outside world interface
+
+// DebugLogger - logs to Stdout
+var DebugLogger = log.New(os.Stdout, "", log.LstdFlags)
+
+// makeLog produces a log string from the arguments passed in
+func makeLog(o interface{}, text string, args ...interface{}) string {
+	out := fmt.Sprintf(text, args...)
+	if o == nil {
+		return out
+	}
+	return fmt.Sprintf("%v: %s", o, out)
+}
+
+// Errorf writes error log output for this Object or Fs.  It
+// unconditionally logs a message regardless of Config.Quiet or
+// Config.Verbose.
+func Errorf(o interface{}, text string, args ...interface{}) {
+	log.Print(makeLog(o, text, args...))
+}
+
+// Logf writes log output for this Object or Fs.  This should be
+// considered to be Info level logging.
+func Logf(o interface{}, text string, args ...interface{}) {
+	if !Config.Quiet {
+		log.Print(makeLog(o, text, args...))
+	}
+}
+
+// Infof writes info on transfers for this Object or Fs
+func Infof(o interface{}, text string, args ...interface{}) {
+	if Config.Verbose {
+		DebugLogger.Print(makeLog(o, text, args...))
+	}
+}
+
+// Debugf writes debugging output for this Object or Fs
+func Debugf(o interface{}, text string, args ...interface{}) {
+	if Config.Verbose {
+		DebugLogger.Print(makeLog(o, text, args...))
+	}
+}