| # Copyright 2014 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import collections |
| import os |
| |
| |
| class PathSet(collections.MutableSet): |
| """A set of paths. |
| |
| All mutation methods can take both directories or individual files, but the |
| iterator yields the individual files. All paths are automatically normalized. |
| """ |
| def __init__(self, iterable=None): |
| self._paths = set() |
| if iterable: |
| self |= iterable |
| |
| def __contains__(self, path): |
| return os.path.realpath(path) in self._paths |
| |
| def __iter__(self): |
| return iter(self._paths) |
| |
| def __len__(self): |
| return len(self._paths) |
| |
| def add(self, path): |
| path = os.path.realpath(path) |
| if os.path.isfile(path): |
| self._paths.add(path) |
| for root, _, files in os.walk(path): |
| for basename in files: |
| file_path = os.path.join(root, basename) |
| if os.path.isfile(file_path): |
| self._paths.add(file_path) |
| |
| def discard(self, path): |
| path = os.path.realpath(path) |
| self._paths.discard(path) |
| for root, _, files in os.walk(path): |
| for basename in files: |
| self._paths.discard(os.path.join(root, basename)) |
