fix(scripts): guard empty arrays under set -u; opt sample-service vats into crypto

Author: FUDCo

packages/sample-services/scripts/reset-services.sh

@@ -86,7 +86,7 @@ rm -f "$SERVICES_HOME/daemon.log"
 # ---------------------------------------------------------------------------
 
 info "Starting sample-services daemon..."
-"$START_SERVICES_SCRIPT" "$MATCHER_URL" "${PASSTHROUGH_ARGS[@]}" >&2
+"$START_SERVICES_SCRIPT" "$MATCHER_URL" ${PASSTHROUGH_ARGS[@]+"${PASSTHROUGH_ARGS[@]}"} >&2
 
 cat <<EOF >&2
 

packages/sample-services/scripts/start-services.sh

@@ -211,7 +211,10 @@ launch_service() {
         vats: {
           [process.env.VAT_NAME]: {
             bundleSpec: process.env.BUNDLE,
-            parameters: { matcherUrl: process.env.MATCHER_URL }
+            parameters: { matcherUrl: process.env.MATCHER_URL },
+            // Both services use crypto.getRandomValues for registration
+            // tokens; RandomNumber also uses it for its draws.
+            globals: ['crypto']
           }
         }
       }

packages/service-matcher/scripts/reset-everything.sh

@@ -115,7 +115,7 @@ rm -f \
 # ---------------------------------------------------------------------------
 
 info "Starting matcher..."
-MATCHER_URL="$("$SCRIPT_DIR/start-matcher.sh" "${START_MATCHER_ARGS[@]}")"
+MATCHER_URL="$("$SCRIPT_DIR/start-matcher.sh" ${START_MATCHER_ARGS[@]+"${START_MATCHER_ARGS[@]}"})"
 if [[ -z "$MATCHER_URL" ]]; then
   echo "[reset] ERROR: start-matcher.sh produced no URL." >&2
   exit 1