Removed fixed dependencies

packages/analyzer/lib/src/summary/summarize_elements.dart

+// Copyright (c) 2015, 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.
+
+library serialization.elements;
+
+import 'dart:convert';
+
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/summary/api_signature.dart';
+import 'package:analyzer/src/summary/format.dart';
+import 'package:analyzer/src/summary/idl.dart';
+import 'package:analyzer/src/summary/package_bundle_reader.dart';
+import 'package:convert/convert.dart';
+import 'package:crypto/crypto.dart';
+
+/**
+ * Object that gathers information uses it to assemble a new
+ * [PackageBundleBuilder].
+ */
+class PackageBundleAssembler {
+  /**
+   * Value that will be stored in [PackageBundle.majorVersion] for any summaries
+   * created by this code.  When making a breaking change to the summary format,
+   * this value should be incremented by 1 and [currentMinorVersion] should be
+   * reset to zero.
+   */
+  static const int currentMajorVersion = 1;
+
+  /**
+   * Value that will be stored in [PackageBundle.minorVersion] for any summaries
+   * created by this code.  When making a non-breaking change to the summary
+   * format that clients might need to be aware of (such as adding a kind of
+   * data that was previously not summarized), this value should be incremented
+   * by 1.
+   */
+  static const int currentMinorVersion = 0;
+
+  final List<String> _linkedLibraryUris = <String>[];
+  final List<LinkedLibraryBuilder> _linkedLibraries = <LinkedLibraryBuilder>[];
+  final List<String> _unlinkedUnitUris = <String>[];
+  final List<UnlinkedUnitBuilder> _unlinkedUnits = <UnlinkedUnitBuilder>[];
+  final Map<String, UnlinkedUnitBuilder> _unlinkedUnitMap =
+      <String, UnlinkedUnitBuilder>{};
+  final List<String> _unlinkedUnitHashes;
+  final List<PackageDependencyInfoBuilder> _dependencies =
+      <PackageDependencyInfoBuilder>[];
+  final bool _excludeHashes;
+
+  /**
+   * Create a [PackageBundleAssembler].  If [excludeHashes] is `true`, hash
+   * computation will be skipped.
+   */
+  PackageBundleAssembler({bool excludeHashes: false})
+      : _excludeHashes = excludeHashes,
+        _unlinkedUnitHashes = excludeHashes ? null : <String>[];
+
+  void addLinkedLibrary(String uri, LinkedLibraryBuilder library) {
+    _linkedLibraries.add(library);
+    _linkedLibraryUris.add(uri);
+  }
+
+  void addUnlinkedUnit(Source source, UnlinkedUnitBuilder unit) {
+    addUnlinkedUnitWithHash(source.uri.toString(), unit,
+        _excludeHashes ? null : _hash(source.contents.data));
+  }
+
+  void addUnlinkedUnitWithHash(
+      String uri, UnlinkedUnitBuilder unit, String hash) {
+    _unlinkedUnitUris.add(uri);
+    _unlinkedUnits.add(unit);
+    _unlinkedUnitMap[uri] = unit;
+    _unlinkedUnitHashes?.add(hash);
+  }
+
+  /**
+   * Assemble a new [PackageBundleBuilder] using the gathered information.
+   */
+  PackageBundleBuilder assemble() {
+    return new PackageBundleBuilder(
+        linkedLibraryUris: _linkedLibraryUris,
+        linkedLibraries: _linkedLibraries,
+        unlinkedUnitUris: _unlinkedUnitUris,
+        unlinkedUnits: _unlinkedUnits,
+        unlinkedUnitHashes: _unlinkedUnitHashes,
+        majorVersion: currentMajorVersion,
+        minorVersion: currentMinorVersion,
+        dependencies: _dependencies,
+        apiSignature: _computeApiSignature());
+  }
+
+  /**
+   * Use the dependency information in [summaryDataStore] to populate the
+   * dependencies in the package bundle being assembled.
+   */
+  void recordDependencies(SummaryDataStore summaryDataStore) {
+    _dependencies.addAll(summaryDataStore.dependencies);
+  }
+
+  /**
+   * Compute the API signature for this package bundle.
+   */
+  String _computeApiSignature() {
+    ApiSignature apiSignature = new ApiSignature();
+    for (String unitUri in _unlinkedUnitMap.keys.toList()..sort()) {
+      apiSignature.addString(unitUri);
+      _unlinkedUnitMap[unitUri].collectApiSignature(apiSignature);
+    }
+    return apiSignature.toHex();
+  }
+
+  /**
+   * Compute a hash of the given file contents.
+   */
+  String _hash(String contents) {
+    return hex.encode(md5.convert(UTF8.encode(contents)).bytes);
+  }
+}