Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/path/lib/path.dart

+// 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.
+
+/// A comprehensive, cross-platform path manipulation library.
+///
+/// ## Installing ##
+///
+/// Use [pub][] to install this package. Add the following to your
+/// `pubspec.yaml` file.
+///
+///     dependencies:
+///       path: any
+///
+/// Then run `pub install`.
+///
+/// For more information, see the [path package on pub.dartlang.org][pkg].
+///
+/// [pub]: http://pub.dartlang.org
+/// [pkg]: http://pub.dartlang.org/packages/path
+///
+/// ## Usage ##
+///
+/// The path library was designed to be imported with a prefix, though you don't
+/// have to if you don't want to:
+///
+///     import 'package:path/path.dart' as path;
+///
+/// The most common way to use the library is through the top-level functions.
+/// These manipulate path strings based on your current working directory and
+/// the path style (POSIX, Windows, or URLs) of the host platform. For example:
+///
+///     path.join("directory", "file.txt");
+///
+/// This calls the top-level [join] function to join "directory" and "file.txt"
+/// using the current platform's directory separator.
+///
+/// If you want to work with paths for a specific platform regardless of the
+/// underlying platform that the program is running on, you can create a
+/// [Context] and give it an explicit [Style]:
+///
+///     var context = new path.Context(style: Style.windows);
+///     context.join("directory", "file.txt");
+///
+/// This will join "directory" and "file.txt" using the Windows path separator,
+/// even when the program is run on a POSIX machine.
+library path;
+
+import 'src/context.dart';
+import 'src/style.dart';
+
+export 'src/context.dart' hide createInternal;
+export 'src/path_exception.dart';
+export 'src/style.dart';
+
+/// A default context for manipulating POSIX paths.
+final Context posix = new Context(style: Style.posix);
+
+/// A default context for manipulating Windows paths.
+final Context windows = new Context(style: Style.windows);
+
+/// A default context for manipulating URLs.
+final Context url = new Context(style: Style.url);
+
+/// The system path context.
+///
+/// This differs from a context created with [new Context] in that its
+/// [Context.current] is always the current working directory, rather than being
+/// set once when the context is created.
+final Context context = createInternal();
+
+/// Returns the [Style] of the current context.
+///
+/// This is the style that all top-level path functions will use.
+Style get style => context.style;
+
+/// Gets the path to the current working directory.
+///
+/// In the browser, this means the current URL, without the last file segment.
+String get current {
+  var uri = Uri.base;
+  if (Style.platform == Style.url) {
+    return uri.resolve('.').toString();
+  } else {
+    var path = uri.toFilePath();
+    // Remove trailing '/' or '\'.
+    int lastIndex = path.length - 1;
+    assert(path[lastIndex] == '/' || path[lastIndex] == '\\');
+    return path.substring(0, lastIndex);
+  }
+}
+
+/// Gets the path separator for the current platform. This is `\` on Windows
+/// and `/` on other platforms (including the browser).
+String get separator => context.separator;
+
+/// Creates a new path by appending the given path parts to [current].
+/// Equivalent to [join()] with [current] as the first argument. Example:
+///
+///     path.absolute('path', 'to/foo'); // -> '/your/current/dir/path/to/foo'
+String absolute(String part1, [String part2, String part3, String part4,
+    String part5, String part6, String part7]) =>
+        context.absolute(part1, part2, part3, part4, part5, part6, part7);
+
+/// Gets the part of [path] after the last separator.
+///
+///     path.basename('path/to/foo.dart'); // -> 'foo.dart'
+///     path.basename('path/to');          // -> 'to'
+///
+/// Trailing separators are ignored.
+///
+///     path.basename('path/to/'); // -> 'to'
+String basename(String path) => context.basename(path);
+
+/// Gets the part of [path] after the last separator, and without any trailing
+/// file extension.
+///
+///     path.basenameWithoutExtension('path/to/foo.dart'); // -> 'foo'
+///
+/// Trailing separators are ignored.
+///
+///     path.basenameWithoutExtension('path/to/foo.dart/'); // -> 'foo'
+String basenameWithoutExtension(String path) =>
+    context.basenameWithoutExtension(path);
+
+/// Gets the part of [path] before the last separator.
+///
+///     path.dirname('path/to/foo.dart'); // -> 'path/to'
+///     path.dirname('path/to');          // -> 'path'
+///
+/// Trailing separators are ignored.
+///
+///     path.dirname('path/to/'); // -> 'path'
+///
+/// If an absolute path contains no directories, only a root, then the root
+/// is returned.
+///
+///     path.dirname('/');  // -> '/' (posix)
+///     path.dirname('c:\');  // -> 'c:\' (windows)
+///
+/// If a relative path has no directories, then '.' is returned.
+///
+///     path.dirname('foo');  // -> '.'
+///     path.dirname('');  // -> '.'
+String dirname(String path) => context.dirname(path);
+
+/// Gets the file extension of [path]: the portion of [basename] from the last
+/// `.` to the end (including the `.` itself).
+///
+///     path.extension('path/to/foo.dart');    // -> '.dart'
+///     path.extension('path/to/foo');         // -> ''
+///     path.extension('path.to/foo');         // -> ''
+///     path.extension('path/to/foo.dart.js'); // -> '.js'
+///
+/// If the file name starts with a `.`, then that is not considered the
+/// extension:
+///
+///     path.extension('~/.bashrc');    // -> ''
+///     path.extension('~/.notes.txt'); // -> '.txt'
+String extension(String path) => context.extension(path);
+
+// TODO(nweiz): add a UNC example for Windows once issue 7323 is fixed.
+/// Returns the root of [path], if it's absolute, or the empty string if it's
+/// relative.
+///
+///     // Unix
+///     path.rootPrefix('path/to/foo'); // -> ''
+///     path.rootPrefix('/path/to/foo'); // -> '/'
+///
+///     // Windows
+///     path.rootPrefix(r'path\to\foo'); // -> ''
+///     path.rootPrefix(r'C:\path\to\foo'); // -> r'C:\'
+///
+///     // URL
+///     path.rootPrefix('path/to/foo'); // -> ''
+///     path.rootPrefix('http://dartlang.org/path/to/foo');
+///       // -> 'http://dartlang.org'
+String rootPrefix(String path) => context.rootPrefix(path);
+
+/// Returns `true` if [path] is an absolute path and `false` if it is a
+/// relative path.
+///
+/// On POSIX systems, absolute paths start with a `/` (forward slash). On
+/// Windows, an absolute path starts with `\\`, or a drive letter followed by
+/// `:/` or `:\`. For URLs, absolute paths either start with a protocol and
+/// optional hostname (e.g. `http://dartlang.org`, `file://`) or with a `/`.
+///
+/// URLs that start with `/` are known as "root-relative", since they're
+/// relative to the root of the current URL. Since root-relative paths are still
+/// absolute in every other sense, [isAbsolute] will return true for them. They
+/// can be detected using [isRootRelative].
+bool isAbsolute(String path) => context.isAbsolute(path);
+
+/// Returns `true` if [path] is a relative path and `false` if it is absolute.
+/// On POSIX systems, absolute paths start with a `/` (forward slash). On
+/// Windows, an absolute path starts with `\\`, or a drive letter followed by
+/// `:/` or `:\`.
+bool isRelative(String path) => context.isRelative(path);
+
+/// Returns `true` if [path] is a root-relative path and `false` if it's not.
+///
+/// URLs that start with `/` are known as "root-relative", since they're
+/// relative to the root of the current URL. Since root-relative paths are still
+/// absolute in every other sense, [isAbsolute] will return true for them. They
+/// can be detected using [isRootRelative].
+///
+/// No POSIX and Windows paths are root-relative.
+bool isRootRelative(String path) => context.isRootRelative(path);
+
+/// Joins the given path parts into a single path using the current platform's
+/// [separator]. Example:
+///
+///     path.join('path', 'to', 'foo'); // -> 'path/to/foo'
+///
+/// If any part ends in a path separator, then a redundant separator will not
+/// be added:
+///
+///     path.join('path/', 'to', 'foo'); // -> 'path/to/foo
+///
+/// If a part is an absolute path, then anything before that will be ignored:
+///
+///     path.join('path', '/to', 'foo'); // -> '/to/foo'
+String join(String part1, [String part2, String part3, String part4,
+    String part5, String part6, String part7, String part8]) =>
+        context.join(part1, part2, part3, part4, part5, part6, part7, part8);
+
+/// Joins the given path parts into a single path using the current platform's
+/// [separator]. Example:
+///
+///     path.joinAll(['path', 'to', 'foo']); // -> 'path/to/foo'
+///
+/// If any part ends in a path separator, then a redundant separator will not
+/// be added:
+///
+///     path.joinAll(['path/', 'to', 'foo']); // -> 'path/to/foo
+///
+/// If a part is an absolute path, then anything before that will be ignored:
+///
+///     path.joinAll(['path', '/to', 'foo']); // -> '/to/foo'
+///
+/// For a fixed number of parts, [join] is usually terser.
+String joinAll(Iterable<String> parts) => context.joinAll(parts);
+
+// TODO(nweiz): add a UNC example for Windows once issue 7323 is fixed.
+/// Splits [path] into its components using the current platform's [separator].
+///
+///     path.split('path/to/foo'); // -> ['path', 'to', 'foo']
+///
+/// The path will *not* be normalized before splitting.
+///
+///     path.split('path/../foo'); // -> ['path', '..', 'foo']
+///
+/// If [path] is absolute, the root directory will be the first element in the
+/// array. Example:
+///
+///     // Unix
+///     path.split('/path/to/foo'); // -> ['/', 'path', 'to', 'foo']
+///
+///     // Windows
+///     path.split(r'C:\path\to\foo'); // -> [r'C:\', 'path', 'to', 'foo']
+///
+///     // Browser
+///     path.split('http://dartlang.org/path/to/foo');
+///       // -> ['http://dartlang.org', 'path', 'to', 'foo']
+List<String> split(String path) => context.split(path);
+
+/// Normalizes [path], simplifying it by handling `..`, and `.`, and
+/// removing redundant path separators whenever possible.
+///
+///     path.normalize('path/./to/..//file.text'); // -> 'path/file.txt'
+String normalize(String path) => context.normalize(path);
+
+/// Attempts to convert [path] to an equivalent relative path from the current
+/// directory.
+///
+///     // Given current directory is /root/path:
+///     path.relative('/root/path/a/b.dart'); // -> 'a/b.dart'
+///     path.relative('/root/other.dart'); // -> '../other.dart'
+///
+/// If the [from] argument is passed, [path] is made relative to that instead.
+///
+///     path.relative('/root/path/a/b.dart',
+///         from: '/root/path'); // -> 'a/b.dart'
+///     path.relative('/root/other.dart',
+///         from: '/root/path'); // -> '../other.dart'
+///
+/// If [path] and/or [from] are relative paths, they are assumed to be relative
+/// to the current directory.
+///
+/// Since there is no relative path from one drive letter to another on Windows,
+/// or from one hostname to another for URLs, this will return an absolute path
+/// in those cases.
+///
+///     // Windows
+///     path.relative(r'D:\other', from: r'C:\home'); // -> 'D:\other'
+///
+///     // URL
+///     path.relative('http://dartlang.org', from: 'http://pub.dartlang.org');
+///       // -> 'http://dartlang.org'
+String relative(String path, {String from}) =>
+    context.relative(path, from: from);
+
+/// Returns `true` if [child] is a path beneath `parent`, and `false` otherwise.
+///
+///     path.isWithin('/root/path', '/root/path/a'); // -> true
+///     path.isWithin('/root/path', '/root/other'); // -> false
+///     path.isWithin('/root/path', '/root/path') // -> false
+bool isWithin(String parent, String child) => context.isWithin(parent, child);
+
+/// Removes a trailing extension from the last part of [path].
+///
+///     withoutExtension('path/to/foo.dart'); // -> 'path/to/foo'
+String withoutExtension(String path) => context.withoutExtension(path);
+
+/// Returns the path represented by [uri], which may be a [String] or a [Uri].
+///
+/// For POSIX and Windows styles, [uri] must be a `file:` URI. For the URL
+/// style, this will just convert [uri] to a string.
+///
+///     // POSIX
+///     context.fromUri('file:///path/to/foo')
+///       // -> '/path/to/foo'
+///
+///     // Windows
+///     context.fromUri('file:///C:/path/to/foo')
+///       // -> r'C:\path\to\foo'
+///
+///     // URL
+///     context.fromUri('http://dartlang.org/path/to/foo')
+///       // -> 'http://dartlang.org/path/to/foo'
+///
+/// If [uri] is relative, a relative path will be returned.
+///
+///     path.fromUri('path/to/foo'); // -> 'path/to/foo'
+String fromUri(uri) => context.fromUri(uri);
+
+/// Returns the URI that represents [path].
+///
+/// For POSIX and Windows styles, this will return a `file:` URI. For the URL
+/// style, this will just convert [path] to a [Uri].
+///
+///     // POSIX
+///     path.toUri('/path/to/foo')
+///       // -> Uri.parse('file:///path/to/foo')
+///
+///     // Windows
+///     path.toUri(r'C:\path\to\foo')
+///       // -> Uri.parse('file:///C:/path/to/foo')
+///
+///     // URL
+///     path.toUri('http://dartlang.org/path/to/foo')
+///       // -> Uri.parse('http://dartlang.org/path/to/foo')
+///
+/// If [path] is relative, a relative URI will be returned.
+///
+///     path.toUri('path/to/foo')
+///       // -> Uri.parse('path/to/foo')
+Uri toUri(String path) => context.toUri(path);
+
+/// Returns a terse, human-readable representation of [uri].
+///
+/// [uri] can be a [String] or a [Uri]. If it can be made relative to the
+/// current working directory, that's done. Otherwise, it's returned as-is. This
+/// gracefully handles non-`file:` URIs for [Style.posix] and [Style.windows].
+///
+/// The returned value is meant for human consumption, and may be either URI-
+/// or path-formatted.
+///
+///     // POSIX at "/root/path"
+///     path.prettyUri('file:///root/path/a/b.dart'); // -> 'a/b.dart'
+///     path.prettyUri('http://dartlang.org/'); // -> 'http://dartlang.org'
+///
+///     // Windows at "C:\root\path"
+///     path.prettyUri('file:///C:/root/path/a/b.dart'); // -> r'a\b.dart'
+///     path.prettyUri('http://dartlang.org/'); // -> 'http://dartlang.org'
+///
+///     // URL at "http://dartlang.org/root/path"
+///     path.prettyUri('http://dartlang.org/root/path/a/b.dart');
+///         // -> r'a/b.dart'
+///     path.prettyUri('file:///root/path'); // -> 'file:///root/path'
+String prettyUri(uri) => context.prettyUri(uri);