Added a package for Warewulf config

internal/pkg/warewulfconf/constructors.go

@@ -0,0 +1,33 @@
+package warewulfconf
+
+import (
+	"fmt"
+	"github.com/hpcng/warewulf/internal/pkg/wwlog"
+	"gopkg.in/yaml.v2"
+	"io/ioutil"
+)
+
+func New() (ControllerConf, error) {
+	var ret ControllerConf
+
+	wwlog.Printf(wwlog.DEBUG, "Opening Warewulf configuration file: %s\n", ConfigFile)
+	data, err := ioutil.ReadFile(ConfigFile)
+	if err != nil {
+		fmt.Printf("error reading node configuration file\n")
+		return ret, err
+	}
+
+	wwlog.Printf(wwlog.DEBUG, "Unmarshaling the Warewulf configuration\n")
+	err = yaml.Unmarshal(data, &ret)
+	if err != nil {
+		return ret, err
+	}
+
+	if ret.Warewulf.Port == 0 {
+		ret.Warewulf.Port = 9873
+	}
+
+	wwlog.Printf(wwlog.DEBUG, "Returning node object\n")
+
+	return ret, nil
+}