roll "common" DEPS, and replace tools/pyutils with it

tools/pyutils/url_utils.py

-#!/usr/bin/python
-
-"""
-Copyright 2014 Google Inc.
-
-Use of this source code is governed by a BSD-style license that can be
-found in the LICENSE file.
-
-Utilities for working with URLs.
-
-TODO(epoger): move this into tools/utils for broader use?
-"""
-
-# System-level imports
-import contextlib
-import os
-import shutil
-import urllib
-import urlparse
-
-
-def create_filepath_url(filepath):
-  """ Returns a file:/// URL pointing at the given filepath on local disk.
-
-  Args:
-    filepath: string; path to a file on local disk (may be absolute or relative,
-        and the file does not need to exist)
-
-  Returns:
-    A file:/// URL pointing at the file.  Regardless of whether filepath was
-        specified as a relative or absolute path, the URL will contain an
-        absolute path to the file.
-
-  Raises:
-    An Exception, if filepath is already a URL.
-  """
-  if urlparse.urlparse(filepath).scheme:
-    raise Exception('"%s" is already a URL' % filepath)
-  return urlparse.urljoin(
-      'file:', urllib.pathname2url(os.path.abspath(filepath)))
-
-
-def copy_contents(source_url, dest_path, create_subdirs_if_needed=False):
-  """ Copies the full contents of the URL 'source_url' into
-  filepath 'dest_path'.
-
-  Args:
-    source_url: string; complete URL to read from
-    dest_path: string; complete filepath to write to (may be absolute or
-        relative)
-    create_subdirs_if_needed: boolean; whether to create subdirectories as
-        needed to create dest_path
-
-  Raises:
-    Some subclass of Exception if unable to read source_url or write dest_path.
-  """
-  if create_subdirs_if_needed:
-    dest_dir = os.path.dirname(dest_path)
-    if not os.path.exists(dest_dir):
-      os.makedirs(dest_dir)
-  with contextlib.closing(urllib.urlopen(source_url)) as source_handle:
-    with open(dest_path, 'wb') as dest_handle:
-      shutil.copyfileobj(fsrc=source_handle, fdst=dest_handle)