feat(cli): gRPC command to debug CDK components (#1507)

Signed-off-by: Salim Afiune Maya <[email protected]>

Author: afiune

cli/cmd/grpc.go

@@ -0,0 +1,50 @@
+//
+// Author:: Salim Afiune Maya (<[email protected]>)
+// Copyright:: Copyright 2024, Lacework Inc.
+// License:: Apache License, Version 2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package cmd
+
+import (
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	// grpcCmd is a hidden command that developers use to debug CDK components
+	grpcCmd = &cobra.Command{
+		Use:    "grpc",
+		Hidden: true,
+		Short:  "Starts a CDK gRPC server (developer mode)",
+		Args:   cobra.NoArgs,
+		RunE: func(_ *cobra.Command, _ []string) error {
+			cli.OutputHuman("\nDevelopment mode for CDK components")
+			cli.OutputHuman("\n===================================\n\n")
+			cli.OutputHuman("When debugging a component, it might expect some environment variables and a\n")
+			cli.OutputHuman("running gRPC server, this command starts the CDK server and shows the variables\n")
+			cli.OutputHuman("that your component might need:\n\n")
+			vars := cli.envs()
+			cli.OutputHuman("export %s", strings.Join(vars, " \\\n  "))
+			cli.OutputHuman("\n\n'Ctrl+c' to stop the server. ")
+			return cli.Serve()
+		},
+	}
+)
+
+func init() {
+	rootCmd.AddCommand(grpcCmd)
+}