feat: Add apply command to dhclientctl (#12)

Author: pojntfx

cmd/dhclientctl/cmd/apply.go

@@ -0,0 +1,70 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	constants "github.com/pojntfx/godhcpd/cmd"
+	godhcpd "github.com/pojntfx/godhcpd/pkg/proto/generated"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"gitlab.com/bloom42/libs/rz-go"
+	"gitlab.com/bloom42/libs/rz-go/log"
+	"google.golang.org/grpc"
+)
+
+var applyCmd = &cobra.Command{
+	Use:     "apply",
+	Aliases: []string{"a"},
+	Short:   "Apply a dhcp client",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if !(viper.GetString(configFileKey) == configFileDefault) {
+			viper.SetConfigFile(viper.GetString(configFileKey))
+
+			if err := viper.ReadInConfig(); err != nil {
+				return err
+			}
+		}
+
+		conn, err := grpc.Dial(viper.GetString(serverHostPortKey), grpc.WithInsecure(), grpc.WithBlock())
+		if err != nil {
+			return err
+		}
+		defer conn.Close()
+
+		client := godhcpd.NewDHClientManagerClient(conn)
+
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+
+		response, err := client.Create(ctx, &godhcpd.DHClient{
+			Device: viper.GetString(deviceKey),
+		})
+		if err != nil {
+			return err
+		}
+
+		fmt.Printf("dhcp client \"%s\" created\n", response.GetId())
+
+		return nil
+	},
+}
+
+func init() {
+	var (
+		serverHostPortFlag string
+		configFileFlag     string
+		deviceFlag         string
+	)
+
+	applyCmd.PersistentFlags().StringVarP(&serverHostPortFlag, serverHostPortKey, "s", constants.DHClientDHostPortDefault, "Host:port of the dhclientd server to use.")
+	applyCmd.PersistentFlags().StringVarP(&configFileFlag, configFileKey, "f", configFileDefault, "Configuration file to use.")
+	applyCmd.PersistentFlags().StringVarP(&deviceFlag, deviceKey, "d", "edge1", "Device to bind to.")
+
+	if err := viper.BindPFlags(applyCmd.PersistentFlags()); err != nil {
+		log.Fatal(constants.CouldNotBindFlagsErrorMessage, rz.Err(err))
+	}
+
+	viper.AutomaticEnv()
+
+	rootCmd.AddCommand(applyCmd)
+}

cmd/dhcpdctl/cmd/apply.go

@@ -16,7 +16,7 @@ import (
 var applyCmd = &cobra.Command{
 	Use:     "apply",
 	Aliases: []string{"a"},
-	Short:   "Apply an dhcp server",
+	Short:   "Apply a dhcp server",
 	RunE: func(cmd *cobra.Command, args []string) error {
 		var subnets []*godhcpd.Subnet
 
@@ -69,7 +69,7 @@ func init() {
 		subnetsFlag        string
 	)
 
-	applyCmd.PersistentFlags().StringVarP(&serverHostPortFlag, serverHostPortKey, "s", constants.DHCPDDHostPortDefault, "Host:port of the godhcpd server to use.")
+	applyCmd.PersistentFlags().StringVarP(&serverHostPortFlag, serverHostPortKey, "s", constants.DHCPDDHostPortDefault, "Host:port of the dhcpdd server to use.")
 	applyCmd.PersistentFlags().StringVarP(&configFileFlag, configFileKey, "f", configFileDefault, "Configuration file to use.")
 	applyCmd.PersistentFlags().StringVarP(&deviceFlag, deviceKey, "d", "edge0", "Device to bind to.")
 	applyCmd.PersistentFlags().StringVarP(&subnetsFlag, subnetsKey, "n", `[