Reapply "Move the linter core to the analyzer package"

pkg/analyzer/lib/src/lint/pub.dart

Index: pkg/analyzer/lib/src/lint/pub.dart
diff --git a/pkg/analyzer/lib/src/lint/pub.dart b/pkg/analyzer/lib/src/lint/pub.dart
new file mode 100644
index 0000000000000000000000000000000000000000..8d12e134bb54aa213c11ad6633cf85897e1a69ce
--- /dev/null
+++ b/pkg/analyzer/lib/src/lint/pub.dart
@@ -0,0 +1,430 @@
+// 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.
+
+import 'dart:collection';
+
+import 'package:source_span/source_span.dart';
+import 'package:yaml/yaml.dart';
+
+PSEntry _findEntry(YamlMap map, String key) {
+  PSEntry entry;
+  map.nodes.forEach((k, v) {
+    if (k is YamlScalar && key == k.toString()) {
+      entry = _processScalar(k, v);
+    }
+  });
+  return entry;
+}
+
+PSDependencyList _processDependencies(YamlScalar key, YamlNode v) {
+  if (v is! YamlMap) {
+    return null;
+  }
+  YamlMap depsMap = v;
+
+  _PSDependencyList deps = new _PSDependencyList(new _PSNode(key));
+  depsMap.nodes.forEach((k, v) => deps.add(new _PSDependency(k, v)));
+  return deps;
+}
+
+PSGitRepo _processGitRepo(YamlScalar key, YamlNode v) {
+  if (v is! YamlMap) {
+    return null;
+  }
+  YamlMap hostMap = v;
+  // url: git://github.com/munificent/kittens.git
+  // ref: some-branch
+  _PSGitRepo repo = new _PSGitRepo();
+  repo.token = new _PSNode(key);
+  repo.ref = _findEntry(hostMap, 'ref');
+  repo.url = _findEntry(hostMap, 'url');
+  return repo;
+}
+
+PSHost _processHost(YamlScalar key, YamlNode v) {
+  if (v is! YamlMap) {
+    return null;
+  }
+  YamlMap hostMap = v;
+  // name: transmogrify
+  // url: http://your-package-server.com
+  _PSHost host = new _PSHost();
+  host.token = new _PSNode(key);
+  host.name = _findEntry(hostMap, 'name');
+  host.url = _findEntry(hostMap, 'url');
+  return host;
+}
+
+PSNodeList _processList(YamlScalar key, YamlNode v) {
+  if (v is! YamlList) {
+    return null;
+  }
+  YamlList nodeList = v;
+
+  return new _PSNodeList(
+      new _PSNode(key), nodeList.nodes.map((n) => new _PSNode(n)));
+}
+
+PSEntry _processScalar(YamlScalar key, YamlNode value) {
+  if (value is! YamlScalar) {
+    return null;
+    //WARN?
+  }
+  return new PSEntry(new _PSNode(key), new _PSNode(value));
+}
+
+abstract class PSDependency {
+  PSGitRepo get git;
+  PSHost get host;
+  PSNode get name;
+  PSEntry get version;
+}
+
+abstract class PSDependencyList extends Object
+    with IterableMixin<PSDependency> {}
+
+class PSEntry {
+  final PSNode key;
+  final PSNode value;
+  PSEntry(this.key, this.value);
+
+  @override
+  String toString() => '${key != null ? (key.toString() + ': ') : ''}$value';
+}
+
+abstract class PSGitRepo {
+  PSEntry get ref;
+  PSNode get token;
+  PSEntry get url;
+}
+
+abstract class PSHost {
+  PSEntry get name;
+  PSNode get token;
+  PSEntry get url;
+}
+
+abstract class PSNode {
+  SourceSpan get span;
+  String get text;
+}
+
+abstract class PSNodeList extends Object with IterableMixin<PSNode> {
+  @override
+  Iterator<PSNode> get iterator;
+  PSNode get token;
+}
+
+abstract class Pubspec {
+  factory Pubspec.parse(String source, {Uri sourceUrl}) =>
+      new _Pubspec(source, sourceUrl: sourceUrl);
+  PSEntry get author;
+  PSNodeList get authors;
+  PSDependencyList get dependencies;
+  PSEntry get description;
+  PSDependencyList get devDependencies;
+  PSEntry get documentation;
+  PSEntry get homepage;
+  PSEntry get name;
+  PSEntry get version;
+  accept(PubspecVisitor visitor);
+}
+
+abstract class PubspecVisitor<T> {
+  T visitPackageAuthor(PSEntry author) => null;
+  T visitPackageAuthors(PSNodeList authors) => null;
+  T visitPackageDependencies(PSDependencyList dependencies) => null;
+  T visitPackageDependency(PSDependency dependency) => null;
+  T visitPackageDescription(PSEntry description) => null;
+  T visitPackageDevDependencies(PSDependencyList dependencies) => null;
+  T visitPackageDevDependency(PSDependency dependency) => null;
+  T visitPackageDocumentation(PSEntry documentation) => null;
+  T visitPackageHomepage(PSEntry homepage) => null;
+  T visitPackageName(PSEntry name) => null;
+  T visitPackageVersion(PSEntry version) => null;
+}
+
+class _PSDependency extends PSDependency {
+  @override
+  PSNode name;
+  @override
+  PSEntry version;
+  @override
+  PSHost host;
+  @override
+  PSGitRepo git;
+
+  factory _PSDependency(dynamic k, YamlNode v) {
+    if (k is! YamlScalar) {
+      return null;
+    }
+    YamlScalar key = k;
+
+    _PSDependency dep = new _PSDependency._();
+
+    dep.name = new _PSNode(key);
+
+    if (v is YamlScalar) {
+      // Simple version
+      dep.version = new PSEntry(null, new _PSNode(v));
+    } else if (v is YamlMap) {
+      // hosted:
+      //   name: transmogrify
+      //   url: http://your-package-server.com
+      //   version: '>=0.4.0 <1.0.0'
+      YamlMap details = v;
+      details.nodes.forEach((k, v) {
+        if (k is! YamlScalar) {
+          return;
+        }
+        YamlScalar key = k;
+        switch (key.toString()) {
+          case 'version':
+            dep.version = _processScalar(key, v);
+            break;
+          case 'hosted':
+            dep.host = _processHost(key, v);
+            break;
+          case 'git':
+            dep.git = _processGitRepo(key, v);
+            break;
+        }
+      });
+    }
+    return dep;
+  }
+
+  _PSDependency._();
+
+  @override
+  String toString() {
+    var sb = new StringBuffer();
+    if (name != null) {
+      sb.write('$name:');
+    }
+    var versionInfo = '';
+    if (version != null) {
+      if (version.key == null) {
+        versionInfo = ' $version';
+      } else {
+        versionInfo = '\n    $version';
+      }
+    }
+    sb.writeln(versionInfo);
+    if (host != null) {
+      sb.writeln(host);
+    }
+    if (git != null) {
+      sb.writeln(git);
+    }
+    return sb.toString();
+  }
+}
+
+class _PSDependencyList extends PSDependencyList {
+  final dependencies = <PSDependency>[];
+  final PSNode token;
+
+  _PSDependencyList(this.token);
+
+  @override
+  Iterator<PSDependency> get iterator => dependencies.iterator;
+
+  add(PSDependency dependency) {
+    if (dependency != null) {
+      dependencies.add(dependency);
+    }
+  }
+
+  @override
+  String toString() => '$token\n${dependencies.join('  ')}';
+}
+
+class _PSGitRepo implements PSGitRepo {
+  @override
+  PSNode token;
+  @override
+  PSEntry ref;
+  @override
+  PSEntry url;
+  @override
+  String toString() => '''
+    $token:
+      $url
+      $ref''';
+}
+
+class _PSHost implements PSHost {
+  @override
+  PSNode token;
+  @override
+  PSEntry name;
+  @override
+  PSEntry url;
+  @override
+  String toString() => '''
+    $token:
+      $name
+      $url''';
+}
+
+class _PSNode implements PSNode {
+  @override
+  final String text;
+  @override
+  final SourceSpan span;
+
+  _PSNode(YamlNode node)
+      : text = node.value?.toString(),
+        span = node.span;
+
+  @override
+  String toString() => '$text';
+}
+
+class _PSNodeList extends PSNodeList {
+  @override
+  final PSNode token;
+  final Iterable<PSNode> nodes;
+
+  _PSNodeList(this.token, this.nodes);
+
+  @override
+  Iterator<PSNode> get iterator => nodes.iterator;
+
+  @override
+  String toString() => '''
+$token:
+  - ${nodes.join('\n  - ')}''';
+}
+
+class _Pubspec implements Pubspec {
+  @override
+  PSEntry author;
+  @override
+  PSNodeList authors;
+  @override
+  PSEntry description;
+  @override
+  PSEntry documentation;
+  @override
+  PSEntry homepage;
+  @override
+  PSEntry name;
+  @override
+  PSEntry version;
+  @override
+  PSDependencyList dependencies;
+  @override
+  PSDependencyList devDependencies;
+
+  _Pubspec(String src, {Uri sourceUrl}) {
+    try {
+      _parse(src, sourceUrl: sourceUrl);
+    } on Exception {
+      // ignore
+    }
+  }
+
+  @override
+  void accept(PubspecVisitor visitor) {
+    if (author != null) {
+      visitor.visitPackageAuthor(author);
+    }
+    if (authors != null) {
+      visitor.visitPackageAuthors(authors);
+    }
+    if (description != null) {
+      visitor.visitPackageDescription(description);
+    }
+    if (documentation != null) {
+      visitor.visitPackageDocumentation(documentation);
+    }
+    if (homepage != null) {
+      visitor.visitPackageHomepage(homepage);
+    }
+    if (name != null) {
+      visitor.visitPackageName(name);
+    }
+    if (version != null) {
+      visitor.visitPackageVersion(version);
+    }
+    if (dependencies != null) {
+      visitor.visitPackageDependencies(dependencies);
+      dependencies.forEach((d) => visitor.visitPackageDependency(d));
+    }
+    if (devDependencies != null) {
+      visitor.visitPackageDevDependencies(devDependencies);
+      devDependencies.forEach((d) => visitor.visitPackageDevDependency(d));
+    }
+  }
+
+  @override
+  String toString() {
+    var sb = new _StringBuilder();
+    sb.writelin(name);
+    sb.writelin(version);
+    sb.writelin(author);
+    sb.writelin(authors);
+    sb.writelin(description);
+    sb.writelin(homepage);
+    sb.writelin(dependencies);
+    sb.writelin(devDependencies);
+    return sb.toString();
+  }
+
+  _parse(String src, {Uri sourceUrl}) {
+    var yaml = loadYamlNode(src, sourceUrl: sourceUrl);
+    if (yaml is! YamlMap) {
+      return;
+    }
+    YamlMap yamlMap = yaml;
+    yamlMap.nodes.forEach((k, v) {
+      if (k is! YamlScalar) {
+        return;
+      }
+      YamlScalar key = k;
+      switch (key.toString()) {
+        case 'author':
+          author = _processScalar(key, v);
+          break;
+        case 'authors':
+          authors = _processList(key, v);
+          break;
+        case 'homepage':
+          homepage = _processScalar(key, v);
+          break;
+        case 'name':
+          name = _processScalar(key, v);
+          break;
+        case 'description':
+          description = _processScalar(key, v);
+          break;
+        case 'documentation':
+          documentation = _processScalar(key, v);
+          break;
+        case 'dependencies':
+          dependencies = _processDependencies(key, v);
+          break;
+        case 'dev_dependencies':
+          devDependencies = _processDependencies(key, v);
+          break;
+        case 'version':
+          version = _processScalar(key, v);
+          break;
+      }
+    });
+  }
+}
+
+class _StringBuilder {
+  StringBuffer buffer = new StringBuffer();
+  @override
+  String toString() => buffer.toString();
+  writelin(Object value) {
+    if (value != null) {
+      buffer.writeln(value);
+    }
+  }
+}