Beginning to break out wwbuild into wwctl with proper Go structure and Cobra

internal/pkg/wwlog/wwlog.go

@@ -0,0 +1,59 @@
+package wwlog
+
+import (
+	"log"
+)
+
+const (
+	CRITICAL 	= 0
+	ERROR 		= 1
+	WARN	 	= 2
+	INFO		= 3
+	VERBOSE		= 4
+	DEBUG 		= 5
+)
+
+var (
+	logLevel uint
+)
+
+func SetLevel(level uint) {
+	logLevel = level
+
+	if logLevel == DEBUG {
+		log.SetFlags(log.Lmicroseconds | log.Llongfile)
+	} else {
+		log.SetFlags(0)
+	}
+	Printf(VERBOSE, "Set log level to: %d\n", logLevel)
+}
+
+func prefixLevel(level uint) {
+	if level == DEBUG {
+		log.SetPrefix("[DEBUG]    ")
+	} else if level == VERBOSE {
+		log.SetPrefix("[VERBOSE]  ")
+	} else if level == INFO {
+		log.SetPrefix("[INFO]   ")
+	} else if level == WARN {
+		log.SetPrefix("[WARN]     ")
+	} else if level == ERROR {
+		log.SetPrefix("[ERROR] 	  ")
+	} else if level == CRITICAL {
+		log.SetPrefix("[CRITICAL] ")
+	}
+}
+
+func Println(level uint, message string) {
+	if level <= logLevel {
+		prefixLevel(level)
+		log.Println(message)
+	}
+}
+
+func Printf(level uint, message string, a...interface{}) {
+	if level <= logLevel {
+		prefixLevel(level)
+		log.Printf(message, a...)
+	}
+}