1# Copyright (c) 2010 Google Inc. All rights reserved. 2# 3# Redistribution and use in source and binary forms, with or without 4# modification, are permitted provided that the following conditions are 5# met: 6# 7# * Redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer. 9# * Redistributions in binary form must reproduce the above 10# copyright notice, this list of conditions and the following disclaimer 11# in the documentation and/or other materials provided with the 12# distribution. 13# * Neither the name of Google Inc. nor the names of its 14# contributors may be used to endorse or promote products derived from 15# this software without specific prior written permission. 16# 17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29# A home for file logic which should sit above FileSystem, but 30# below more complicated objects. 31 32import zipfile 33 34class Workspace(object): 35 def __init__(self, filesystem, executive): 36 self._filesystem = filesystem 37 self._executive = executive # FIXME: Remove if create_zip is moved to python. 38 39 def find_unused_filename(self, directory, name, extension, search_limit=100): 40 for count in range(search_limit): 41 if count: 42 target_name = "%s-%s.%s" % (name, count, extension) 43 else: 44 target_name = "%s.%s" % (name, extension) 45 target_path = self._filesystem.join(directory, target_name) 46 if not self._filesystem.exists(target_path): 47 return target_path 48 # If we can't find an unused name in search_limit tries, just give up. 49 return None 50 51 def create_zip(self, zip_path, source_path, zip_class=zipfile.ZipFile): 52 # It's possible to create zips with Python: 53 # zip_file = ZipFile(zip_path, 'w') 54 # for root, dirs, files in os.walk(source_path): 55 # for path in files: 56 # absolute_path = os.path.join(root, path) 57 # zip_file.write(os.path.relpath(path, source_path)) 58 # However, getting the paths, encoding and compression correct could be non-trivial. 59 # So, for now we depend on the environment having "zip" installed (likely fails on Win32) 60 self._executive.run_command(['zip', '-r', zip_path, source_path]) 61 return zip_class(zip_path) 62