dart:io | Remove deprecated _Path library, and use FileSystemEntity.parent for recursive Directory.…

sdk/lib/io/path_impl.dart

Index: sdk/lib/io/path_impl.dart
diff --git a/sdk/lib/io/path_impl.dart b/sdk/lib/io/path_impl.dart
deleted file mode 100644
index 991586305a6c6eaa4ce0783c94e3d171bb8e7685..0000000000000000000000000000000000000000
--- a/sdk/lib/io/path_impl.dart
+++ /dev/null
@@ -1,309 +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.
-
-part of dart.io;
-
-class __Path implements _Path {
-  final String _path;
-  final bool isWindowsShare;
-
-  __Path(String source)
-      : _path = _clean(source), isWindowsShare = _isWindowsShare(source);
-
-  __Path.raw(String source) : _path = source, isWindowsShare = false;
-
-  __Path._internal(String this._path, bool this.isWindowsShare);
-
-  static String _clean(String source) {
-    if (Platform.operatingSystem == 'windows') return _cleanWindows(source);
-    return source;
-  }
-
-  static String _cleanWindows(String source) {
-    // Change \ to /.
-    var clean = source.replaceAll('\\', '/');
-    // Add / before intial [Drive letter]:
-    if (clean.length >= 2 && clean[1] == ':') {
-      clean = '/$clean';
-    }
-    if (_isWindowsShare(source)) {
-      return clean.substring(1, clean.length);
-    }
-    return clean;
-  }
-
-  static bool _isWindowsShare(String source) {
-    return Platform.operatingSystem == 'windows' && source.startsWith('\\\\');
-  }
-
-  int get hashCode => _path.hashCode;
-  bool get isEmpty => _path.isEmpty;
-  bool get isAbsolute => _path.startsWith('/');
-  bool get hasTrailingSeparator => _path.endsWith('/');
-
-  String toString() => _path;
-
-  _Path relativeTo(_Path base) {
-    // Returns a path "relative" such that
-    // base.join(relative) == this.canonicalize.
-    // Throws exception if an impossible case is reached.
-    if (base.isAbsolute != isAbsolute ||
-        base.isWindowsShare != isWindowsShare) {
-      throw new ArgumentError(
-          "Invalid case of _Path.relativeTo(base):\n"
-          "  Path and base must both be relative, or both absolute.\n"
-          "  Arguments: $_path.relativeTo($base)");
-    }
-
-    var basePath = base.toString();
-    // Handle drive letters specially on Windows.
-    if (base.isAbsolute && Platform.operatingSystem == 'windows') {
-      bool baseHasDrive =
-          basePath.length >= 4 && basePath[2] == ':' && basePath[3] == '/';
-      bool pathHasDrive =
-          _path.length >= 4 && _path[2] == ':' && _path[3] == '/';
-      if (baseHasDrive && pathHasDrive) {
-        int baseDrive = basePath.codeUnitAt(1) | 32;  // Convert to uppercase.
-        if (baseDrive >= 'a'.codeUnitAt(0) &&
-            baseDrive <= 'z'.codeUnitAt(0) &&
-            baseDrive == (_path.codeUnitAt(1) | 32)) {
-          if(basePath[1] != _path[1]) {
-            // Replace the drive letter in basePath with that from _path.
-            basePath = '/${_path[1]}:/${basePath.substring(4)}';
-            base = new _Path(basePath);
-          }
-        } else {
-          throw new ArgumentError(
-              "Invalid case of _Path.relativeTo(base):\n"
-              "  Base path and target path are on different Windows drives.\n"
-              "  Arguments: $_path.relativeTo($base)");
-        }
-      } else if (baseHasDrive != pathHasDrive) {
-        throw new ArgumentError(
-            "Invalid case of _Path.relativeTo(base):\n"
-            "  Base path must start with a drive letter if and "
-            "only if target path does.\n"
-            "  Arguments: $_path.relativeTo($base)");
-      }
-
-    }
-    if (_path.startsWith(basePath)) {
-      if (_path == basePath) return new _Path('.');
-      // There must be a '/' at the end of the match, or immediately after.
-      int matchEnd = basePath.length;
-      if (_path[matchEnd - 1] == '/' || _path[matchEnd] == '/') {
-        // Drop any extra '/' characters at matchEnd
-        while (matchEnd < _path.length && _path[matchEnd] == '/') {
-          matchEnd++;
-        }
-        return new _Path(_path.substring(matchEnd)).canonicalize();
-      }
-    }
-
-    List<String> baseSegments = base.canonicalize().segments();
-    List<String> pathSegments = canonicalize().segments();
-    if (baseSegments.length == 1 && baseSegments[0] == '.') {
-      baseSegments = [];
-    }
-    if (pathSegments.length == 1 && pathSegments[0] == '.') {
-      pathSegments = [];
-    }
-    int common = 0;
-    int length = min(pathSegments.length, baseSegments.length);
-    while (common < length && pathSegments[common] == baseSegments[common]) {
-      common++;
-    }
-    final segments = new List<String>();
-
-    if (common < baseSegments.length && baseSegments[common] == '..') {
-      throw new ArgumentError(
-          "Invalid case of _Path.relativeTo(base):\n"
-          "  Base path has more '..'s than path does.\n"
-          "  Arguments: $_path.relativeTo($base)");
-    }
-    for (int i = common; i < baseSegments.length; i++) {
-      segments.add('..');
-    }
-    for (int i = common; i < pathSegments.length; i++) {
-      segments.add('${pathSegments[i]}');
-    }
-    if (segments.isEmpty) {
-      segments.add('.');
-    }
-    if (hasTrailingSeparator) {
-        segments.add('');
-    }
-    return new _Path(segments.join('/'));
-  }
-
-
-  _Path join(_Path further) {
-    if (further.isAbsolute) {
-      throw new ArgumentError(
-          "Path.join called with absolute Path as argument.");
-    }
-    if (isEmpty) {
-      return further.canonicalize();
-    }
-    if (hasTrailingSeparator) {
-      var joined = new __Path._internal('$_path${further}', isWindowsShare);
-      return joined.canonicalize();
-    }
-    var joined = new __Path._internal('$_path/${further}', isWindowsShare);
-    return joined.canonicalize();
-  }
-
-  // Note: The URI RFC names for canonicalize, join, and relativeTo
-  // are normalize, resolve, and relativize.  But resolve and relativize
-  // drop the last segment of the base path (the filename), on URIs.
-  _Path canonicalize() {
-    if (isCanonical) return this;
-    return makeCanonical();
-  }
-
-  bool get isCanonical {
-    // Contains no consecutive path separators.
-    // Contains no segments that are '.'.
-    // Absolute paths have no segments that are '..'.
-    // All '..' segments of a relative path are at the beginning.
-    if (isEmpty) return false;  // The canonical form of '' is '.'.
-    if (_path == '.') return true;
-    List segs = _path.split('/');  // Don't mask the getter 'segments'.
-    if (segs[0] == '') {  // Absolute path
-      segs[0] = null;  // Faster than removeRange().
-    } else {  // A canonical relative path may start with .. segments.
-      for (int pos = 0;
-           pos < segs.length && segs[pos] == '..';
-           ++pos) {
-        segs[pos] = null;
-      }
-    }
-    if (segs.last == '') segs.removeLast();  // Path ends with /.
-    // No remaining segments can be ., .., or empty.
-    return !segs.any((s) => s == '' || s == '.' || s == '..');
-  }
-
-  _Path makeCanonical() {
-    bool isAbs = isAbsolute;
-    List segs = segments();
-    String drive;
-    if (isAbs &&
-        !segs.isEmpty &&
-        segs[0].length == 2 &&
-        segs[0][1] == ':') {
-      drive = segs[0];
-      segs.removeRange(0, 1);
-    }
-    List newSegs = [];
-    for (String segment in segs) {
-      switch (segment) {
-        case '..':
-          // Absolute paths drop leading .. markers, including after a drive.
-          if (newSegs.isEmpty) {
-            if (isAbs) {
-              // Do nothing: drop the segment.
-            } else {
-              newSegs.add('..');
-            }
-          } else if (newSegs.last == '..') {
-            newSegs.add('..');
-          } else {
-            newSegs.removeLast();
-          }
-          break;
-        case '.':
-        case '':
-          // Do nothing - drop the segment.
-          break;
-        default:
-          newSegs.add(segment);
-          break;
-      }
-    }
-
-    List segmentsToJoin = [];
-    if (isAbs) {
-      segmentsToJoin.add('');
-      if (drive != null) {
-        segmentsToJoin.add(drive);
-      }
-    }
-
-    if (newSegs.isEmpty) {
-      if (isAbs) {
-        segmentsToJoin.add('');
-      } else {
-        segmentsToJoin.add('.');
-      }
-    } else {
-      segmentsToJoin.addAll(newSegs);
-      if (hasTrailingSeparator) {
-        segmentsToJoin.add('');
-      }
-    }
-    return new __Path._internal(segmentsToJoin.join('/'), isWindowsShare);
-  }
-
-  String toNativePath() {
-    if (isEmpty) return '.';
-    if (Platform.operatingSystem == 'windows') {
-      String nativePath = _path;
-      // Drop '/' before a drive letter.
-      if (nativePath.length >= 3 &&
-          nativePath.startsWith('/') &&
-          nativePath[2] == ':') {
-        nativePath = nativePath.substring(1);
-      }
-      nativePath = nativePath.replaceAll('/', '\\');
-      if (isWindowsShare) {
-        return '\\$nativePath';
-      }
-      return nativePath;
-    }
-    return _path;
-  }
-
-  List<String> segments() {
-    List result = _path.split('/');
-    if (isAbsolute) result.removeRange(0, 1);
-    if (hasTrailingSeparator) result.removeLast();
-    return result;
-  }
-
-  _Path append(String finalSegment) {
-    if (isEmpty) {
-      return new __Path._internal(finalSegment, isWindowsShare);
-    } else if (hasTrailingSeparator) {
-      return new __Path._internal('$_path$finalSegment', isWindowsShare);
-    } else {
-      return new __Path._internal('$_path/$finalSegment', isWindowsShare);
-    }
-  }
-
-  String get filenameWithoutExtension {
-    var name = filename;
-    if (name == '.' || name == '..') return name;
-    int pos = name.lastIndexOf('.');
-    return (pos < 0) ? name : name.substring(0, pos);
-  }
-
-  String get extension {
-    var name = filename;
-    int pos = name.lastIndexOf('.');
-    return (pos < 0) ? '' : name.substring(pos + 1);
-  }
-
-  _Path get directoryPath {
-    int pos = _path.lastIndexOf('/');
-    if (pos < 0) return new _Path('');
-    while (pos > 0 && _path[pos - 1] == '/') --pos;
-    var dirPath = (pos > 0) ? _path.substring(0, pos) : '/';
-    return new __Path._internal(dirPath, isWindowsShare);
-  }
-
-  String get filename {
-    int pos = _path.lastIndexOf('/');
-    return _path.substring(pos + 1);
-  }
-}