Fix Parsing of Nested Subcommands (#9236)

(cherry picked from commit 2ffe833)

shared/cmd/flags.go

@@ -257,13 +257,28 @@ func LoadFlagsFromConfig(cliCtx *cli.Context, flags []cli.Flag) error {
 // ValidateNoArgs insures that the application is not run with erroneous arguments or flags.
 // This function should be used in the app.Before, whenever the application supports a default command.
 func ValidateNoArgs(ctx *cli.Context) error {
+	commandList := ctx.App.Commands
 	for _, a := range ctx.Args().Slice() {
 		if strings.HasPrefix(a, "-") {
 			continue
 		}
-		if c := ctx.App.Command(a); c == nil {
+		c := checkCommandList(commandList, a)
+		if c == nil {
 			return fmt.Errorf("unrecognized argument: %s", a)
 		}
+		// Set the command list as the subcommand's
+		// from the current selected parent command.
+		commandList = c.Subcommands
+	}
+	return nil
+}
+
+// verifies that the provided command is in the command list.
+func checkCommandList(commands []*cli.Command, name string) *cli.Command {
+	for _, c := range commands {
+		if c.Name == name {
+			return c
+		}
 	}
 	return nil
 }

shared/cmd/flags_test.go

@@ -55,6 +55,24 @@ func TestValidateNoArgs(t *testing.T) {
 		Commands: []*cli.Command{
 			{
 				Name: "bar",
+				Subcommands: []*cli.Command{
+					{
+						Name: "subComm1",
+						Subcommands: []*cli.Command{
+							{
+								Name: "subComm3",
+							},
+						},
+					},
+					{
+						Name: "subComm2",
+						Subcommands: []*cli.Command{
+							{
+								Name: "subComm4",
+							},
+						},
+					},
+				},
 			},
 		},
 	}
@@ -71,4 +89,39 @@ func TestValidateNoArgs(t *testing.T) {
 	// It should fail on unregistered flag (default logic in urfave/cli).
 	err = app.Run([]string{"command", "bar", "--baz"})
 	require.ErrorContains(t, "flag provided but not defined", err)
+
+	// Handle Nested Subcommands
+
+	err = app.Run([]string{"command", "bar", "subComm1"})
+	require.NoError(t, err)
+
+	err = app.Run([]string{"command", "bar", "subComm2"})
+	require.NoError(t, err)
+
+	// Should fail from unknown subcommands.
+	err = app.Run([]string{"command", "bar", "subComm3"})
+	require.ErrorContains(t, "unrecognized argument: subComm3", err)
+
+	err = app.Run([]string{"command", "bar", "subComm4"})
+	require.ErrorContains(t, "unrecognized argument: subComm4", err)
+
+	// Should fail with invalid double nested subcommands.
+	err = app.Run([]string{"command", "bar", "subComm1", "subComm2"})
+	require.ErrorContains(t, "unrecognized argument: subComm2", err)
+
+	err = app.Run([]string{"command", "bar", "subComm1", "subComm4"})
+	require.ErrorContains(t, "unrecognized argument: subComm4", err)
+
+	err = app.Run([]string{"command", "bar", "subComm2", "subComm1"})
+	require.ErrorContains(t, "unrecognized argument: subComm1", err)
+
+	err = app.Run([]string{"command", "bar", "subComm2", "subComm3"})
+	require.ErrorContains(t, "unrecognized argument: subComm3", err)
+
+	// Should pass with correct nested double subcommands.
+	err = app.Run([]string{"command", "bar", "subComm1", "subComm3"})
+	require.NoError(t, err)
+
+	err = app.Run([]string{"command", "bar", "subComm2", "subComm4"})
+	require.NoError(t, err)
 }