from __future__ import absolute_import, unicode_literals
from fnmatch import fnmatch
import io
import logging
import os
from ...utils import Tokenizer
from .file_system import FileSystem
log = logging.getLogger(__name__)
[docs]class Local(FileSystem):
""":class:`.FileSystem` implementation for the local file system."""
def __init__(self, file_name):
super(Local, self).__init__(file_name)
@staticmethod
def resolve_filenames(expr):
if expr.startswith('file://'):
expr = expr[7:]
if os.path.isfile(expr):
return [expr]
if '/' not in expr:
expr = '.' + os.path.sep + expr
t = Tokenizer(expr)
prefix = t.next(['*', '?'])
if not prefix.endswith('/') and '/' in prefix:
prefix = os.path.dirname(prefix)
files = []
for root, _, filenames in os.walk(prefix):
for filename in filenames:
path = os.path.join(root, filename)
if fnmatch(path, expr) or fnmatch(path, expr + '/part*'):
files.append(path)
return files
@property
def file_path(self):
if self.file_name.startswith('file://'):
return self.file_name[7:]
return self.file_name
def exists(self):
return os.path.exists(self.file_path)
def load(self):
with io.open(self.file_path, 'rb') as f:
return io.BytesIO(f.read())
def load_text(self, encoding='utf8', encoding_errors='ignore'):
with io.open(self.file_path, 'r',
encoding=encoding, errors=encoding_errors) as f:
return io.StringIO(f.read())
def dump(self, stream):
file_path = self.file_path # caching
# making sure directory exists
dirname = os.path.dirname(file_path)
if dirname and not os.path.exists(dirname):
log.debug('creating local directory {0}'.format(dirname))
os.makedirs(dirname)
log.debug('writing file {0}'.format(file_path))
with io.open(file_path, 'wb') as f:
for c in stream:
f.write(c)
return self