Record information about a summary's dependencies in the summary itself.

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

Index: pkg/analyzer/lib/src/summary/package_bundle_reader.dart
diff --git a/pkg/analyzer/lib/src/summary/package_bundle_reader.dart b/pkg/analyzer/lib/src/summary/package_bundle_reader.dart
index 062ce82466032020f5e85ac5978e60a079f4c9d2..f56557ea236aba0f1e2ab75bb28f4c65032adbfe 100644
--- a/pkg/analyzer/lib/src/summary/package_bundle_reader.dart
+++ b/pkg/analyzer/lib/src/summary/package_bundle_reader.dart
@@ -10,6 +10,7 @@ import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
+import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
 import 'package:analyzer/src/summary/resynthesize.dart';
 import 'package:analyzer/src/task/dart.dart';
@@ -273,6 +274,15 @@ class SummaryDataStore {
   final List<PackageBundle> bundles = <PackageBundle>[];
 
   /**
+   * List of dependency information for the package bundles in this
+   * [SummaryDataStore], in a form that is ready to store in a newly generated.

[scheglov, 2016/08/09 02:39:44]

Extra '.' at the end.

[Paul Berry, 2016/08/09 16:30:30]

Fixed.

+   * summary.  Computing this information has nonzero cost, so it is only
+   * recorded if the [SummaryDataStore] is constructed with the argument
+   * `recordDependencies`.  Otherwise `null`.
+   */
+  final List<PackageDependencyInfoBuilder> dependencies;
+
+  /**
    * Map from the URI of a compilation unit to the unlinked summary of that
    * compilation unit.
    */
@@ -288,7 +298,16 @@ class SummaryDataStore {
    */
   final Map<String, String> uriToSummaryPath = <String, String>{};
 
-  SummaryDataStore(Iterable<String> summaryPaths) {
+  /**
+   * Create a [SummaryDataStore] and populate it with the summaries in
+   * [summaryPaths].  If [recordDependencyInfo] is `true`, record
+   * [PackageDependencyInfo] for each summary, for later access via
+   * [dependencies].
+   */
+  SummaryDataStore(Iterable<String> summaryPaths,
+      {bool recordDependencyInfo: false})
+      : dependencies =
+            recordDependencyInfo ? <PackageDependencyInfoBuilder>[] : null {
     summaryPaths.forEach(_fillMaps);
   }
 
@@ -297,6 +316,29 @@ class SummaryDataStore {
    */
   void addBundle(String path, PackageBundle bundle) {
     bundles.add(bundle);
+    if (dependencies != null) {
+      Set<String> includedPackageNames = new Set<String>();
+      bool includesDartUris = false;
+      bool includesFileUris = false;
+      for (String uriString in bundle.unlinkedUnitUris) {
+        Uri uri = FastUri.parse(uriString);
+        String scheme = uri.scheme;
+        if (scheme == 'package') {
+          List<String> pathSegments = uri.pathSegments;
+          includedPackageNames.add(pathSegments.isEmpty ? '' : pathSegments[0]);
+        } else if (scheme == 'file') {
+          includesFileUris = true;
+        } else if (scheme == 'dart') {
+          includesDartUris = true;
+        }
+      }
+      dependencies.add(new PackageDependencyInfoBuilder(
+          includedPackageNames: includedPackageNames.toList()..sort(),
+          includesDartUris: includesDartUris,
+          includesFileUris: includesFileUris,
+          apiSignature: bundle.apiSignature,
+          summaryPath: path));
+    }
     for (int i = 0; i < bundle.unlinkedUnitUris.length; i++) {
       String uri = bundle.unlinkedUnitUris[i];
       uriToSummaryPath[uri] = path;