share rollup onLog across all builds

rollup.config.mjs

@@ -48,27 +48,7 @@ function esmConfig() {
   ];
 
   return {
-    onLog(level, log, handler) {
-      switch (log.code) {
-        case 'CIRCULAR_DEPENDENCY':
-          if (log.ids.some((id) => id.includes('node_modules/rsvp/lib/rsvp'))) {
-            // rsvp has some internal cycles but they don't bother us
-            return;
-          }
-          process.stderr.write(
-            `Circular dependency:\n${log.ids.map((id) => '    ' + id).join('\n')}\n`
-          );
-          throw new Error(`Circular dependencies are forbidden`);
-        case 'EMPTY_BUNDLE':
-          // Some of our entrypoints are type-only and result in empty bundles.
-          // We prune the actual empty files elsewhere in this config (see
-          // pruneEmptyBundles). This silences the warning from rollup about
-          // them.
-          return;
-        default:
-          handler(level, log);
-      }
-    },
+    onLog: handleRollupWarnings,
     input: {
       ...renameEntrypoints(exposedDependencies(), (name) => join('packages', name, 'index')),
       ...renameEntrypoints(packages(), (name) => join('packages', name)),
@@ -126,6 +106,7 @@ function legacyBundleConfig(input, output, { isDeveloping, isExternal }) {
 
       interop: 'esModule',
     },
+    onLog: handleRollupWarnings,
     plugins: [
       amdDefineSupport(),
       ...(isDeveloping ? [concatenateAMDEntrypoints()] : []),
@@ -516,3 +497,25 @@ function pruneEmptyBundles() {
     },
   };
 }
+
+function handleRollupWarnings(level, log, handler) {
+  switch (log.code) {
+    case 'CIRCULAR_DEPENDENCY':
+      if (log.ids.some((id) => id.includes('node_modules/rsvp/lib/rsvp'))) {
+        // rsvp has some internal cycles but they don't bother us
+        return;
+      }
+      process.stderr.write(
+        `Circular dependency:\n${log.ids.map((id) => '    ' + id).join('\n')}\n`
+      );
+      throw new Error(`Circular dependencies are forbidden`);
+    case 'EMPTY_BUNDLE':
+      // Some of our entrypoints are type-only and result in empty bundles.
+      // We prune the actual empty files elsewhere in this config (see
+      // pruneEmptyBundles). This silences the warning from rollup about
+      // them.
+      return;
+    default:
+      handler(level, log);
+  }
+}