feat(convertNetconf): Add support for network config conversion

Adding the flag -convertNetconf which is used to specify the config
format to convert from (right now, only 'debian' is supported).
Once the network configs are generated, they are written to
systemd's runtime network directory and the network is restarted.

network/network.go

@@ -1,10 +1,6 @@
 package network
 
 import (
-	"fmt"
-	"io"
-	"os"
-	"path"
 	"strings"
 )
 
@@ -26,43 +22,6 @@ func ProcessDebianNetconf(config string) ([]InterfaceGenerator, error) {
 	return buildInterfaces(interfaces), nil
 }
 
-func WriteConfigs(configPath string, interfaces []InterfaceGenerator) error {
-	if err := os.MkdirAll(configPath, os.ModePerm+os.ModeDir); err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
-
-	for _, iface := range interfaces {
-		filename := path.Join(configPath, fmt.Sprintf("%s.netdev", iface.Name()))
-		if err := writeConfig(filename, iface.GenerateNetdevConfig()); err != nil {
-			return err
-		}
-		filename = path.Join(configPath, fmt.Sprintf("%s.link", iface.Name()))
-		if err := writeConfig(filename, iface.GenerateLinkConfig()); err != nil {
-			return err
-		}
-		filename = path.Join(configPath, fmt.Sprintf("%s.network", iface.Name()))
-		if err := writeConfig(filename, iface.GenerateNetworkConfig()); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func writeConfig(filename string, config string) error {
-	if config == "" {
-		return nil
-	}
-
-	if file, err := os.Create(filename); err == nil {
-		io.WriteString(file, config)
-		file.Close()
-		return nil
-	} else {
-		return err
-	}
-}
-
 func formatConfig(config string) []string {
 	lines := []string{}
 	config = strings.Replace(config, "\\\n", "", -1)