Add log module

log/log.go

@@ -0,0 +1,49 @@
+
+package log
+
+import "fmt"
+
+// Colors
+// ---------------------------------------------------------
+const (
+	InfoColor    = "\033[1;34m%s\033[0m"
+	NoticeColor  = "\033[1;36m%s\033[0m"
+	WarningColor = "\033[1;33m%s\033[0m"
+	ErrorColor   = "\033[1;31m%s\033[0m"
+)
+
+// Define LogFunc prototype
+//  Function that takes a format string and variadic number
+//  of arguments (like printf)
+// ---------------------------------------------------------
+type LogFunc func(format string, args ...interface{})
+
+// Create a log function.
+//  This is the base logging function. by providing a prefix
+//  a new log function of LogFunc type will be created
+//  appending "[ <prefix> ]" before the message.
+// ---------------------------------------------------------
+func logfn(prefix string) LogFunc {
+	return func(format string, args ...interface{}) {
+		format = "[" + prefix + "] " + format + "\n"
+		fmt.Printf(format, args...)
+	}
+}
+
+// Declare our different log functions.
+// ---------------------------------------------------------
+var Info LogFunc
+var Notice LogFunc
+var Warning LogFunc
+var Error LogFunc
+
+// Initilize log module
+// ---------------------------------------------------------
+func init() {
+
+	// Initilize functions.
+	Info 	= logfn(fmt.Sprintf(InfoColor, "INFO"))
+	Notice 	= logfn(fmt.Sprintf(NoticeColor, "NOTICE"))
+	Warning = logfn(fmt.Sprintf(WarningColor, "WARN"))
+	Error 	= logfn(fmt.Sprintf(ErrorColor, "ERROR"))
+}