Move pub into sdk/lib/_internal.

utils/pub/package.dart

Index: utils/pub/package.dart
diff --git a/utils/pub/package.dart b/utils/pub/package.dart
deleted file mode 100644
index ce1ad35d7a370699e156466a02c7f3e1cb5fc538..0000000000000000000000000000000000000000
--- a/utils/pub/package.dart
+++ /dev/null
@@ -1,238 +0,0 @@
-// Copyright (c) 2012, 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 package;
-
-import 'dart:async';
-
-import 'package:pathos/path.dart' as path;
-
-import 'io.dart';
-import 'pubspec.dart';
-import 'source.dart';
-import 'source_registry.dart';
-import 'version.dart';
-
-final _README_REGEXP = new RegExp(r"^README($|\.)", caseSensitive: false);
-
-/// A named, versioned, unit of code and resource reuse.
-class Package {
-  /// The path to the directory containing the package.
-  final String dir;
-
-  /// The name of the package.
-  String get name {
-    if (pubspec.name != null) return pubspec.name;
-    if (dir != null) return path.basename(dir);
-    return null;
-  }
-
-  /// The package's version.
-  Version get version => pubspec.version;
-
-  /// The parsed pubspec associated with this package.
-  final Pubspec pubspec;
-
-  /// The ids of the packages that this package depends on. This is what is
-  /// specified in the pubspec when this package depends on another.
-  List<PackageRef> get dependencies => pubspec.dependencies;
-
-  /// Returns the path to the README file at the root of the entrypoint, or null
-  /// if no README file is found. If multiple READMEs are found, this uses the
-  /// same conventions as pub.dartlang.org for choosing the primary one: the
-  /// README with the fewest extensions that is lexically ordered first is
-  /// chosen.
-  String get readmePath {
-    var readmes = listDir(dir).map(path.basename).
-        where((entry) => entry.contains(_README_REGEXP));
-    if (readmes.isEmpty) return null;
-
-    return path.join(dir, readmes.reduce((readme1, readme2) {
-      var extensions1 = ".".allMatches(readme1).length;
-      var extensions2 = ".".allMatches(readme2).length;
-      var comparison = extensions1.compareTo(extensions2);
-      if (comparison == 0) comparison = readme1.compareTo(readme2);
-      return (comparison <= 0) ? readme1 : readme2;
-    }));
-  }
-
-  /// Loads the package whose root directory is [packageDir]. [name] is the
-  /// expected name of that package (e.g. the name given in the dependency), or
-  /// `null` if the package being loaded is the entrypoint package.
-  Package.load(String name, String packageDir, SourceRegistry sources)
-      : dir = packageDir,
-        pubspec = new Pubspec.load(name, packageDir, sources);
-
-  /// Constructs a package with the given pubspec. The package will have no
-  /// directory associated with it.
-  Package.inMemory(this.pubspec)
-    : dir = null;
-
-  /// Constructs a package. This should not be called directly. Instead, acquire
-  /// packages from [load()].
-  Package._(this.dir, this.pubspec);
-
-  /// Returns a debug string for the package.
-  String toString() => '$name $version ($dir)';
-}
-
-/// An unambiguous resolved reference to a package. A package ID contains enough
-/// information to correctly install the package.
-///
-/// Note that it's possible for multiple distinct package IDs to point to
-/// different directories that happen to contain identical packages. For
-/// example, the same package may be available from multiple sources. As far as
-/// Pub is concerned, those packages are different.
-class PackageId implements Comparable<PackageId> {
-  /// The name of the package being identified.
-  final String name;
-
-  /// The [Source] used to look up this package given its [description]. If
-  /// this is a root package ID, this will be `null`.
-  final Source source;
-
-  /// The package's version.
-  final Version version;
-
-  /// The metadata used by the package's [source] to identify and locate it. It
-  /// contains whatever [Source]-specific data it needs to be able to install
-  /// the package. For example, the description of a git sourced package might
-  /// by the URL "git://github.com/dart/uilib.git".
-  final description;
-
-  PackageId(this.name, this.source, this.version, this.description);
-
-  /// Creates an ID for the given root package.
-  PackageId.root(Package package)
-      : name = package.name,
-        source = null,
-        version = package.version,
-        description = package.name;
-
-  /// Whether this ID identifies the root package.
-  bool get isRoot => source == null;
-
-  int get hashCode => name.hashCode ^ source.hashCode ^ version.hashCode;
-
-  /// Gets the directory where this package is or would be found in the
-  /// [SystemCache].
-  Future<String> get systemCacheDirectory => source.systemCacheDirectory(this);
-
-  bool operator ==(other) {
-    if (other is! PackageId) return false;
-    // TODO(rnystrom): We're assuming here the name/version/source tuple is
-    // enough to uniquely identify the package and that we don't need to delve
-    // into the description.
-    return other.name == name &&
-           other.source == source &&
-           other.version == version;
-  }
-
-  String toString() {
-    if (isRoot) return "$name $version (root)";
-    if (source.isDefault) return "$name $version";
-    return "$name $version from $source";
-  }
-
-  int compareTo(PackageId other) {
-    var sourceComp = source.name.compareTo(other.source.name);
-    if (sourceComp != 0) return sourceComp;
-
-    var nameComp = name.compareTo(other.name);
-    if (nameComp != 0) return nameComp;
-
-    return version.compareTo(other.version);
-  }
-
-  /// Returns the pubspec for this package.
-  Future<Pubspec> describe() => source.systemCache.describe(this);
-
-  /// Returns a future that completes to the resovled [PackageId] for this id.
-  Future<PackageId> get resolved => source.resolveId(this);
-
-  /// Returns a [PackageRef] that references this package and constrains its
-  /// version to exactly match [version].
-  PackageRef toRef() {
-    return new PackageRef(name, source, version, description);
-  }
-
-  /// Returns `true` if this id's description matches [other]'s.
-  bool descriptionEquals(PackageRef other) {
-    return source.descriptionsEqual(description, other.description);
-  }
-}
-
-/// A reference to a package. Unlike a [PackageId], a PackageRef may not
-/// unambiguously refer to a single package. It may describe a range of allowed
-/// packages.
-class PackageRef {
-  /// The name of the package being identified.
-  final String name;
-
-  /// The [Source] used to look up the package. If this refers to a root
-  /// package, this will be `null`.
-  final Source source;
-
-  /// The allowed package versions.
-  final VersionConstraint constraint;
-
-  /// The metadata used to identify the package being referenced. The
-  /// interpretation of this will vary based on the [source].
-  final description;
-
-  PackageRef(this.name, this.source, this.constraint, this.description);
-
-  // TODO(rnystrom): Remove this if the old version solver is removed.
-  /// Creates a reference to the given root package.
-  PackageRef.root(Package package)
-      : name = package.name,
-        source = null,
-        constraint = package.version,
-        description = package.name;
-
-  /// Whether this refers to the root package.
-  bool get isRoot => source == null;
-
-  String toString() {
-    if (isRoot) return "$name $constraint (root)";
-    return "$name $constraint from $source ($description)";
-  }
-
-  /// Returns a [PackageId] generated from this [PackageRef] with the given
-  /// concrete version.
-  PackageId atVersion(Version version) =>
-    new PackageId(name, source, version, description);
-
-  /// Returns `true` if this reference's description matches [other]'s.
-  bool descriptionEquals(PackageRef other) {
-    return source.descriptionsEqual(description, other.description);
-  }
-}
-
-class PubspecNotFoundException implements Exception {
-  final String name;
-
-  PubspecNotFoundException(this.name);
-
-  String toString() => 'Package "$name" doesn\'t have a pubspec.yaml file.';
-}
-
-class PubspecHasNoNameException implements Exception {
-  final String name;
-
-  PubspecHasNoNameException(this.name);
-
-  String toString() => 'Package "$name"\'s pubspec.yaml file is missing the '
-    'required "name" field (e.g. "name: $name").';
-}
-
-class PubspecNameMismatchException implements Exception {
-  final String expectedName;
-  final String actualName;
-
-  PubspecNameMismatchException(this.expectedName, this.actualName);
-
-  String toString() => 'The name you specified for your dependency, '
-    '"$expectedName", doesn\'t match the name "$actualName" in its pubspec.';
-}