handle error when deleting non existing key

cmd/ppass/ppass.go

@@ -17,6 +17,20 @@ var (
 	rpcClient *RPC.Client
 )
 
+
+func parseSingleArgWithOptionalVault(args []string) (vault string, arg string){
+	if len(args) == 1 {
+		vault = "root"
+		arg = args[0]
+	} else {
+		vault = args[0]
+		arg = args[1]
+	}
+
+	return vault, arg
+}
+
+
 // Create the root command
 var rootCmd = &cobra.Command{
 	Use:   "ppass",
@@ -25,11 +39,17 @@ var rootCmd = &cobra.Command{
 
 // Create the 'list' subcommand
 var listCmd = &cobra.Command{
-	Use:   "list",
+	Use:   "list [vault]",
 	Short: "List all passwords",
+	Args: cobra.RangeArgs(0, 1),
 	Run: func(cmd *cobra.Command, args []string) {
-		var names []string
 		vault := "root"
+
+		if len(args) == 1 {
+			vault = args[0]
+		}
+
+		var names []string
 		err := rpcClient.Call("Query.GetAllNames", &vault, &names)
 
 		if err != nil {
@@ -46,12 +66,12 @@ var listCmd = &cobra.Command{
 var generateCmd = &cobra.Command{
 	Use:   "generate",
 	Short: "Generate a Password",
-	Args: cobra.ExactArgs(1),
+	Args: cobra.RangeArgs(1, 2),
 	Run: func(cmd *cobra.Command, args []string) {
-		serviceName := args[0]
+		vault, serviceName := parseSingleArgWithOptionalVault(args)
 
 		var password *crypto.Password
-		np := rpc.VaultService{ Vault: "root", Service: serviceName }
+		np := rpc.VaultService{ Vault: vault, Service: serviceName }
 		err := rpcClient.Call("Query.Generate", &np, &password)
 
 		if err != nil {
@@ -65,12 +85,12 @@ var generateCmd = &cobra.Command{
 var showCmd = &cobra.Command{
 	Use:   "show",
 	Short: "show a Password",
-	Args: cobra.ExactArgs(1),
+	Args: cobra.RangeArgs(1, 2),
 	Run: func(cmd *cobra.Command, args []string) {
-		serviceName := args[0]
+		vault, serviceName := parseSingleArgWithOptionalVault(args)
 
 		var password *crypto.Password
-		np := rpc.VaultService{ Vault: "root", Service: serviceName }
+		np := rpc.VaultService{ Vault: vault, Service: serviceName }
 		err := rpcClient.Call("Query.Get", &np, &password)
 
 		if err != nil {
@@ -172,16 +192,7 @@ var addPeerCmd = &cobra.Command{
 	Short: "add a peer",
 	Args: cobra.RangeArgs(1, 2),
 	Run: func(cmd *cobra.Command, args []string) {
-		var vault string
-		var peerString string
-
-		if len(args) == 1 {
-			vault = "root"
-			peerString = args[0]
-		} else {
-			vault = args[0]
-			peerString = args[1]
-		}
+		vault, peerString := parseSingleArgWithOptionalVault(args)
 
 		var success *bool
 		np := rpc.VaultPeer{ Vault: vault, Peer: peerString }
@@ -205,16 +216,7 @@ var removePeerCmd = &cobra.Command{
 	Short: "remove a peer",
 	Args: cobra.RangeArgs(1, 2),
 	Run: func(cmd *cobra.Command, args []string) {
-		var vault string
-		var peerString string
-
-		if len(args) == 1 {
-			vault = "root"
-			peerString = args[0]
-		} else {
-			vault = args[0]
-			peerString = args[1]
-		}
+		vault, peerString := parseSingleArgWithOptionalVault(args)
 
 		var success *bool
 		np := rpc.VaultPeer{ Vault: vault, Peer: peerString }
@@ -238,16 +240,7 @@ var deleteCmd = &cobra.Command{
 	Short: "delete a Password",
 	Args: cobra.RangeArgs(1, 2),
 	Run: func(cmd *cobra.Command, args []string) {
-		var vault string
-		var serviceName string
-
-		if len(args) == 1 {
-			vault = "root"
-			serviceName = args[0]
-		} else {
-			vault = args[0]
-			serviceName = args[1]
-		}
+		vault, serviceName := parseSingleArgWithOptionalVault(args)
 
 		var success *bool
 		np := rpc.VaultService{ Vault: vault, Service: serviceName }
@@ -255,6 +248,7 @@ var deleteCmd = &cobra.Command{
 
 		if err != nil {
 			Logger.Error(err)
+			return
 		}
 
 		if *success {

internal/rpc/rpc.go

@@ -140,6 +140,9 @@ func (t *Query) Delete(np *VaultService, success *bool) error {
 	err := val.Delete(np.Service)
 	if err != nil {
 		*success = false
+		if err == storage.ErrNotFound {
+			return nil
+		}
 		return err
 	}
 

internal/storage/vault.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"time"
+	"errors"
 
 	"github.com/ipfs/go-datastore/query"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
@@ -18,6 +19,8 @@ import (
 	. "github.com/k4lipso/pentapass/internal/log"
 )
 
+var ErrNotFound error = errors.New("Not found")
+
 type Vault struct {
 	ID string
 	Datastore *crdt.Datastore
@@ -73,8 +76,15 @@ func (n *Vault) Put(k string, v string) error {
 }
 
 func (n *Vault) Delete(k string) error {
+	_, err := n.GetPassword(k)
+
+	if err != nil {
+		return ErrNotFound
+	}
+
 	key := ds.NewKey(k)
-	err := n.Datastore.Delete(n.ctx, key)
+
+	err = n.Datastore.Delete(n.ctx, key)
 
 	if err != nil {
 		printErr(err)