Update Rollup config to hide known circular dependency warnings.

rollup.mjs

@@ -1,8 +1,51 @@
+/* eslint-disable func-style */
+
 import { makeRollupConfig as jsPsychMakeRollupConfig } from "@jspsych/config/rollup";
 import { iifeNameData } from "./packages/data/rollup.config.mjs";
 
+/**
+ * Create rollup config for any package.
+ *
+ * @param iifeName - IIFE Name for this package
+ * @returns Rollup config
+ */
 export function makeRollupConfig(iifeName) {
   const dataPackageName = "@lookit/data";
+
+  const knownCircularDeps = [
+    "@smithy/util-stream/dist-es/blob/Uint8ArrayBlobAdapter.js",
+    "@smithy/util-endpoints/dist-es/utils/callFunction.js",
+    "@smithy/util-endpoints/dist-es/utils/getEndpointProperties.js",
+    "@smithy/util-endpoints/dist-es/utils/evaluateRules.js",
+    "@aws-crypto/crc32/build/module/index.js",
+    "@aws-crypto/crc32c/build/module/index.js",
+  ];
+
+  /**
+   * Change warnings into errors. This will help us catch build concerns before
+   * they are in production. Also, hide known circular dependency warnings. This is
+   * copied from Rollup's documentation:
+   * https://rollupjs.org/configuration-options/#onlog
+   *
+   * @param level - Message level
+   * @param log - Log object containing location, frame, and message.
+   * @param handler - Function called to record log.
+   */
+  const onLog = (level, log, handler) => {
+    // Don't log known circular dependencies with the data package.
+    if (log.code === "CIRCULAR_DEPENDENCY" && iifeName === "chsData") {
+      if (knownCircularDeps.some((value) => log.message.includes(value))) {
+        return;
+      }
+    }
+
+    if (level === "warn") {
+      handler("error", log);
+    } else {
+      handler(level, log);
+    }
+  };
+
   return jsPsychMakeRollupConfig(iifeName).map((config) => {
     return {
       ...config,
@@ -18,6 +61,7 @@ export function makeRollupConfig(iifeName) {
           },
         };
       }),
+      onLog,
     };
   });
 }