Exclude 'babel-plugin-compact-reexports' during Stage 1 build

packages/compat/src/detect-compact-reexports.ts

@@ -0,0 +1,13 @@
+import { PluginItem } from '@babel/core';
+
+export function isCompactReexports(item: PluginItem): boolean {
+  let pluginPath: string;
+  if (typeof item === 'string') {
+    pluginPath = item;
+  } else if (Array.isArray(item) && item.length > 0 && typeof item[0] === 'string') {
+    pluginPath = item[0];
+  } else {
+    return false;
+  }
+  return /(^|\/)babel-plugin-compact-reexports\//.test(pluginPath);
+}

packages/compat/src/v1-addon.ts

@@ -23,6 +23,7 @@ import modulesCompat from './modules-compat';
 import writeFile from 'broccoli-file-creator';
 import SynthesizeTemplateOnlyComponents from './synthesize-template-only-components';
 import { isEmberAutoImportDynamic } from './detect-ember-auto-import';
+import { isCompactReexports } from './detect-compact-reexports';
 import { ResolvedDep } from '@embroider/core/src/resolver';
 
 const stockTreeNames = Object.freeze([
@@ -1006,6 +1007,12 @@ function babelPluginAllowedInStage1(plugin: PluginItem) {
     return false;
   }
 
+  if (isCompactReexports(plugin)) {
+    // We don't want to replace re-exports at this stage, since that will turn
+    // an `export` statement into a `define`, which is handled in Stage 3
+    return false;
+  }
+
   return true;
 }