Link with exports dependencies.

pkg/analyzer/lib/src/summary/pub_summary.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:core' hide Resource;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 510 matching lines @@
   bool failed = false;
 
   _LinkedNode(this.package, this.unlinked, this.packageToNode);
 
   @override
   bool get isEvaluated => linkedBuilder != null || failed;
 
   @override
   List<_LinkedNode> computeDependencies() {
     Set<_LinkedNode> dependencies = new Set<_LinkedNode>();
+
+    void appendDependency(String uriStr) {
+      Uri uri = FastUri.parse(uriStr);
+      if (!uri.hasScheme) {
+        // A relative path in this package, skip it.
+      } else if (uri.scheme == 'dart') {
+        // Dependency on the SDK is implicit and always added.
+        // The SDK linked bundle is precomputed before linking packages.
+      } else if (uriStr.startsWith('package:')) {
+        String package = PubSummaryManager.getPackageName(uriStr);
+        _LinkedNode packageNode = packageToNode[package];
+        if (packageNode == null) {
+          failed = true;
+        }
+        dependencies.add(packageNode);
+      } else {
+        failed = true;
+      }
+    }
+
     for (UnlinkedUnit unit in unlinked.unlinkedUnits) {
       for (UnlinkedImport import in unit.imports) {
-        String uriStr = import.isImplicit ? 'dart:core' : import.uri;
-        Uri uri = FastUri.parse(uriStr);
-        if (!uri.hasScheme) {
-          // A relative path in this package, skip it.
-        } else if (uri.scheme == 'dart') {
-          // Dependency on the SDK is implicit and always added.
-          // The SDK linked bundle is precomputed before linking packages.
-        } else if (uriStr.startsWith('package:')) {
-          String package = PubSummaryManager.getPackageName(uriStr);
-          _LinkedNode packageNode = packageToNode[package];
-          if (packageNode == null) {
-            failed = true;
-            return const <_LinkedNode>[];
-          }
-          dependencies.add(packageNode);
-        } else {
-          failed = true;
-          return const <_LinkedNode>[];
+        if (!import.isImplicit) {
+          appendDependency(import.uri);
         }
       }
+      for (UnlinkedExportPublic export in unit.publicNamespace.exports) {
+        appendDependency(export.uri);
+      }
+    }
+
+    if (failed) {
+      return const <_LinkedNode>[];
     }
     return dependencies.toList();
   }
 
   @override
   String toString() => package.toString();
 }
 
 /**
  * Specialization of [DependencyWalker] for linking packages.
@@ skipping 44 matching lines @@
           }
         });
         node.linkedBuilder = assembler.assemble();
         store.addBundle(null, node.linkedBuilder);
       }
     } else {
       scc.forEach((node) => node.failed = true);
     }
   }
 }