adding packages

2026-01-15 14:38:46 -08:00
parent ef86e3ab6a
commit 6869cf47e5
5253 changed files with 726695 additions and 34 deletions
@@ -0,0 +1,59 @@
+// Copyright 2017 Google Inc.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+import 'exceptions.dart';
+import 'file_reader.dart';
+import 'path_util.dart';
+
+/// Class to convert a package URI to file URI.
+class PackageUriResolver {
+  /// Path of file .packages
+  final String _dotPackagesFilePath;
+
+  /// Maps package name to folder URI of this package.
+  Map<String, String> _packageMap;
+
+  PackageUriResolver(this._dotPackagesFilePath);
+
+  void _buildPackageMap() {
+    List<String> lines;
+
+    try {
+      lines = FileReader.reader.readAsLines(_dotPackagesFilePath);
+    } catch (e) {
+      throw new UsageException(
+          'Error when reading $_dotPackagesFilePath, '
+          'please run pub get first.',
+          '');
+    }
+
+    _packageMap = <String, String>{};
+    for (var line in lines) {
+      if (line.startsWith('#')) continue;
+      var commaPosition = line.indexOf(':');
+      if (commaPosition == -1) continue;
+      _packageMap[line.substring(0, commaPosition)] =
+          line.substring(commaPosition + 1);
+    }
+  }
+
+  /// Resolves a package URI to a file path.
+  String resolve(String packageUri) {
+    if (_packageMap == null) _buildPackageMap();
+
+    var packageName = getPackageName(packageUri);
+
+    if (_packageMap[packageName] == null) {
+      throw new UsageException(
+          'Cannot locate $packageName, '
+          'probably you need to run pub get again',
+          '');
+    }
+
+    var packagePath = getPath(packageUri);
+    return Uri.parse('${_packageMap[packageName]}$packagePath').toFilePath();
+  }
+}