Add debug wait after invocation completes (#16)

Co-authored-by: Daniel Fangl <daniel.fangl@localstack.cloud>

Author: dominikschubert

cmd/localstack/custom_interop.go

@@ -12,6 +12,7 @@ import (
 	"go.amzn.com/lambda/rapidcore/standalone"
 	"io"
 	"net/http"
+	"strconv"
 	"strings"
 	"time"
 )
@@ -139,6 +140,14 @@ func NewCustomInteropServer(lsOpts *LsOpts, delegate rapidcore.InteropServer, lo
 						log.Fatalln(err)
 					}
 				}
+				// optional sleep. can be used for debugging purposes
+				if lsOpts.PostInvokeWaitMS != "" {
+					waitMS, err := strconv.Atoi(lsOpts.PostInvokeWaitMS)
+					if err != nil {
+						log.Fatalln(err)
+					}
+					time.Sleep(time.Duration(waitMS) * time.Millisecond)
+				}
 				timeoutDuration := time.Duration(timeout) * time.Second
 				memorySize := GetEnvOrDie("AWS_LAMBDA_FUNCTION_MEMORY_SIZE")
 				PrintEndReports(invokeR.InvokeId, "", memorySize, invokeStart, timeoutDuration, logCollector)

cmd/localstack/main.go

@@ -27,6 +27,7 @@ type LsOpts struct {
 	InitLogLevel        string
 	EdgePort            string
 	EnableXRayTelemetry string
+	PostInvokeWaitMS     string
 }
 
 func GetEnvOrDie(env string) string {
@@ -54,6 +55,7 @@ func InitLsOpts() *LsOpts {
 		EnableDnsServer:     os.Getenv("LOCALSTACK_ENABLE_DNS_SERVER"),
 		EnableXRayTelemetry: os.Getenv("LOCALSTACK_ENABLE_XRAY_TELEMETRY"),
 		LocalstackIP:        os.Getenv("LOCALSTACK_HOSTNAME"),
+		PostInvokeWaitMS:     os.Getenv("LOCALSTACK_POST_INVOKE_WAIT_MS"),
 	}
 }
 
@@ -71,6 +73,8 @@ func UnsetLsEnvs() {
 		"LOCALSTACK_ENABLE_DNS_SERVER",
 		"LOCALSTACK_ENABLE_XRAY_TELEMETRY",
 		"LOCALSTACK_INIT_LOG_LEVEL",
+		"LOCALSTACK_POST_INVOKE_WAIT_MS",
+
 		// Docker container ID
 		"HOSTNAME",
 		// User