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29 """Wrapper object for the file system / source tree."""
31 from __future__ import with_statement
44 from webkitpy.common.system import ospath
46 class FileSystem(object):
47 """FileSystem interface for webkitpy.
49 Unless otherwise noted, all paths are allowed to be either absolute
57 sep = property(_get_sep, doc="pathname separator")
59 def abspath(self, path):
60 return os.path.abspath(path)
62 def path_to_module(self, module_name):
63 """A wrapper for all calls to __file__ to allow easy unit testing."""
64 # FIXME: This is the only use of sys in this file. It's possible this function should move elsewhere.
65 return sys.modules[module_name].__file__ # __file__ is always an absolute path.
67 def expanduser(self, path):
68 return os.path.expanduser(path)
70 def basename(self, path):
71 return os.path.basename(path)
73 def chdir(self, path):
76 def copyfile(self, source, destination):
77 shutil.copyfile(source, destination)
79 def dirname(self, path):
80 return os.path.dirname(path)
82 def exists(self, path):
83 return os.path.exists(path)
85 def files_under(self, path, dirs_to_skip=[], file_filter=None):
86 """Return the list of all files under the given path in topdown order.
89 dirs_to_skip: a list of directories to skip over during the
90 traversal (e.g., .svn, resources, etc.)
91 file_filter: if not None, the filter will be invoked
92 with the filesystem object and the dirname and basename of
93 each file found. The file is included in the result if the
94 callback returns True.
96 def filter_all(fs, dirpath, basename):
99 file_filter = file_filter or filter_all
101 if self.isfile(path):
102 if file_filter(self, self.dirname(path), self.basename(path)):
106 if self.basename(path) in dirs_to_skip:
109 for (dirpath, dirnames, filenames) in os.walk(path):
110 for d in dirs_to_skip:
114 for filename in filenames:
115 if file_filter(self, dirpath, filename):
116 files.append(self.join(dirpath, filename))
122 def glob(self, path):
123 return glob.glob(path)
125 def isabs(self, path):
126 return os.path.isabs(path)
128 def isfile(self, path):
129 return os.path.isfile(path)
131 def isdir(self, path):
132 return os.path.isdir(path)
134 def join(self, *comps):
135 return os.path.join(*comps)
137 def listdir(self, path):
138 return os.listdir(path)
140 def mkdtemp(self, **kwargs):
141 """Create and return a uniquely named directory.
143 This is like tempfile.mkdtemp, but if used in a with statement
144 the directory will self-delete at the end of the block (if the
145 directory is empty; non-empty directories raise errors). The
146 directory can be safely deleted inside the block as well, if so
149 Note that the object returned is not a string and does not support all of the string
150 methods. If you need a string, coerce the object to a string and go from there.
152 class TemporaryDirectory(object):
153 def __init__(self, **kwargs):
154 self._kwargs = kwargs
155 self._directory_path = tempfile.mkdtemp(**self._kwargs)
158 return self._directory_path
161 return self._directory_path
163 def __exit__(self, type, value, traceback):
164 # Only self-delete if necessary.
166 # FIXME: Should we delete non-empty directories?
167 if os.path.exists(self._directory_path):
168 os.rmdir(self._directory_path)
170 return TemporaryDirectory(**kwargs)
172 def maybe_make_directory(self, *path):
173 """Create the specified directory if it doesn't already exist."""
175 os.makedirs(self.join(*path))
177 if e.errno != errno.EEXIST:
180 def move(self, source, destination):
181 shutil.move(source, destination)
183 def mtime(self, path):
184 return os.stat(path).st_mtime
186 def normpath(self, path):
187 return os.path.normpath(path)
189 def open_binary_tempfile(self, suffix):
190 """Create, open, and return a binary temp file. Returns a tuple of the file and the name."""
191 temp_fd, temp_name = tempfile.mkstemp(suffix)
192 f = os.fdopen(temp_fd, 'wb')
195 def open_binary_file_for_reading(self, path):
196 return codecs.open(path, 'rb')
198 def read_binary_file(self, path):
199 """Return the contents of the file at the given path as a byte string."""
200 with file(path, 'rb') as f:
203 def write_binary_file(self, path, contents):
204 with file(path, 'wb') as f:
207 def open_text_file_for_reading(self, path):
208 return codecs.open(path, 'r', 'utf8')
210 def open_text_file_for_writing(self, path):
211 return codecs.open(path, 'w', 'utf8')
213 def read_text_file(self, path):
214 """Return the contents of the file at the given path as a Unicode string.
216 The file is read assuming it is a UTF-8 encoded file with no BOM."""
217 with codecs.open(path, 'r', 'utf8') as f:
220 def write_text_file(self, path, contents):
221 """Write the contents to the file at the given location.
223 The file is written encoded as UTF-8 with no BOM."""
224 with codecs.open(path, 'w', 'utf8') as f:
227 def sha1(self, path):
228 contents = self.read_binary_file(path)
229 return hashlib.sha1(contents).hexdigest()
231 def relpath(self, path, start='.'):
232 return ospath.relpath(path, start)
234 class _WindowsError(exceptions.OSError):
235 """Fake exception for Linux and Mac."""
238 def remove(self, path, osremove=os.remove):
239 """On Windows, if a process was recently killed and it held on to a
240 file, the OS will hold on to the file for a short while. This makes
241 attempts to delete the file fail. To work around that, this method
242 will retry for a few seconds until Windows is done with the file."""
244 exceptions.WindowsError
245 except AttributeError:
246 exceptions.WindowsError = FileSystem._WindowsError
248 retry_timeout_sec = 3.0
254 except exceptions.WindowsError, e:
255 time.sleep(sleep_interval)
256 retry_timeout_sec -= sleep_interval
257 if retry_timeout_sec < 0:
260 def rmtree(self, path):
261 """Delete the directory rooted at path, whether empty or not."""
262 shutil.rmtree(path, ignore_errors=True)
264 def split(self, path):
265 """Return (dirname, basename + '.' + ext)"""
266 return os.path.split(path)
268 def splitext(self, path):
269 """Return (dirname + os.sep + basename, '.' + ext)"""
270 return os.path.splitext(path)