Fix python yq filter (#64)

Author: kapoorabhishek24

rust/lit-node/lit-node/scripts/build_and_restart_no_sgx.sh

@@ -5,6 +5,15 @@ if ! command -v yq &> /dev/null; then
     exit 1
 fi
 
+# This script expects Python yq (kislyuk/yq), which uses jq filters.
+merge_rpc_config() {
+    local base_cfg="$1"
+    local overlay_cfg="$2"
+
+    # Slurp both files and merge base with overlay.
+    yq -s -y '.[0] * .[1]' "$base_cfg" "$overlay_cfg"
+}
+
 cargo build
 
 ./scripts/multi-stop.sh
@@ -13,21 +22,21 @@ sleep 2
 
 # Update the rpc-config.yaml file
 if [ -f "./rpc-config.yaml" ]; then
-    echo "rpc-config.yaml file has $(yq '.chains | length' ./rpc-config.yaml) network definitions (pre-update)"
+    echo "rpc-config.yaml file has $(yq -r '.chains | length' ./rpc-config.yaml) network definitions (pre-update)"
 else
     echo "rpc-config.yaml file does not exist, creating it from rpc-config.example.yaml"
 fi
 
 # Check if there's an overlay file and merge on top of the example to create the final rpc-config.yaml file
 if [ -f "./rpc-config.overlay.yaml" ]; then
     echo "Found rpc-config.overlay.yaml, merging with base configuration..."
-    yq eval-all 'select(fileIndex == 0) * select(fileIndex == 1)' ./rpc-config.example.yaml ./rpc-config.overlay.yaml > ./rpc-config.yaml
+    merge_rpc_config ./rpc-config.example.yaml ./rpc-config.overlay.yaml > ./rpc-config.yaml
     echo "Configuration overlay applied successfully."
 else
     echo "No overlay file found, using base configuration."
     cp ./rpc-config.example.yaml ./rpc-config.yaml
 fi
-echo "rpc-config.yaml file has $(yq '.chains | length' ./rpc-config.yaml) network definitions (post-update)"
+echo "rpc-config.yaml file has $(yq -r '.chains | length' ./rpc-config.yaml) network definitions (post-update)"
 
 # Dump the binary to `lit-node/lit-node` so it's in the same folder as its config files
 cp ../target/debug/lit_node ./