Add an option to keep existing enclave when starting local testnet (#6065)

* Add an option to keep existing enclave when starting local testnet.

* Add missing help text.

* Do not add `--image-download always` flag if `-k` is present.

scripts/local_testnet/network_params.yaml

@@ -12,3 +12,6 @@ network_params:
   seconds_per_slot: 3
 global_log_level: debug
 snooper_enabled: false
+additional_services:
+  - dora
+  - prometheus_grafana

scripts/local_testnet/start_local_testnet.sh

@@ -11,15 +11,17 @@ NETWORK_PARAMS_FILE=$SCRIPT_DIR/network_params.yaml
 BUILD_IMAGE=true
 BUILDER_PROPOSALS=false
 CI=false
+KEEP_ENCLAVE=false
 
 # Get options
-while getopts "e:b:n:phc" flag; do
+while getopts "e:b:n:phck" flag; do
   case "${flag}" in
     e) ENCLAVE_NAME=${OPTARG};;
     b) BUILD_IMAGE=${OPTARG};;
     n) NETWORK_PARAMS_FILE=${OPTARG};;
     p) BUILDER_PROPOSALS=true;;
     c) CI=true;;
+    k) KEEP_ENCLAVE=true;;
     h)
         echo "Start a local testnet with kurtosis."
         echo
@@ -31,6 +33,7 @@ while getopts "e:b:n:phc" flag; do
         echo "   -n: kurtosis network params file path           default: $NETWORK_PARAMS_FILE"
         echo "   -p: enable builder proposals"
         echo "   -c: CI mode, run without other additional services like Grafana and Dora explorer"
+        echo "   -k: keeping enclave to allow starting the testnet without destroying the existing one"
         echo "   -h: this help"
         exit
         ;;
@@ -62,9 +65,6 @@ if [ "$CI" = true ]; then
   # TODO: run assertoor tests
   yq eval '.additional_services = []' -i $NETWORK_PARAMS_FILE
   echo "Running without additional services (CI mode)."
-else
-  yq eval '.additional_services = ["dora", "prometheus_grafana"]' -i $NETWORK_PARAMS_FILE
-  echo "Additional services dora and prometheus_grafana added to network_params.yaml"
 fi
 
 if [ "$BUILD_IMAGE" = true ]; then
@@ -75,9 +75,14 @@ else
     echo "Not rebuilding Lighthouse Docker image."
 fi
 
-# Stop local testnet
-kurtosis enclave rm -f $ENCLAVE_NAME 2>/dev/null || true
+IMAGE_DOWNLOAD_FLAG=""
 
-kurtosis run --enclave $ENCLAVE_NAME github.com/ethpandaops/ethereum-package --args-file $NETWORK_PARAMS_FILE
+if [ "$KEEP_ENCLAVE" = false ]; then
+  # Stop local testnet
+  kurtosis enclave rm -f $ENCLAVE_NAME 2>/dev/null || true
+  IMAGE_DOWNLOAD_FLAG="--image-download always"
+fi
+
+kurtosis run --enclave $ENCLAVE_NAME github.com/ethpandaops/ethereum-package $IMAGE_DOWNLOAD_FLAG --args-file $NETWORK_PARAMS_FILE
 
 echo "Started!"