def _rename_gcs_batch(src_dest_pairs):
# Prepare batches.
gcs_batches = []
gcs_current_batch = []
for src, dest in src_dest_pairs:
gcs_current_batch.append((src, dest))
if len(gcs_current_batch) == gcsio.MAX_BATCH_OPERATION_SIZE:
gcs_batches.append(gcs_current_batch)
gcs_current_batch = []
if gcs_current_batch:
gcs_batches.append(gcs_current_batch)
# Execute GCS renames if any and return exceptions.
exceptions = []
for batch in gcs_batches:
copy_statuses = gcsio.GcsIO().copy_batch(batch)
copy_succeeded = []
for src, dest, exception in copy_statuses:
if exception:
exceptions.append((src, dest, exception))
else:
copy_succeeded.append((src, dest))
delete_batch = [src for src, dest in copy_succeeded]
delete_statuses = gcsio.GcsIO().delete_batch(delete_batch)
for i, (src, exception) in enumerate(delete_statuses):
dest = copy_succeeded[i]
if exception:
exceptions.append((src, dest, exception))
return exceptions
def size_of_files_in_glob(path, file_names=None):
"""Returns a map of file names to sizes.
Args:
path: a file path pattern that reads the size of all the files
file_names: List of file names that we need size for, this is added to
support eventually consistent sources where two expantions of glob
might yield to different files.
"""
if path.startswith('gs://'):
file_sizes = gcsio.GcsIO().size_of_files_in_glob(path)
if file_names is None:
return file_sizes
else:
result = {}
# We need to make sure we fetched the size for all the files as the
# list API in GCS is eventually consistent so directly call size for
# any files that may be missing.
for file_name in file_names:
if file_name in file_sizes:
result[file_name] = file_sizes[file_name]
else:
result[file_name] = ChannelFactory.size_in_bytes(
file_name)
return result
else:
if file_names is None:
file_names = ChannelFactory.glob(path)
return {
file_name: ChannelFactory.size_in_bytes(file_name)
for file_name in file_names
}
def rm(path):
if path.startswith('gs://'):
gcsio.GcsIO().delete(path)
else:
try:
os.remove(path)
except OSError as err:
raise IOError(err)
def size_in_bytes(path):
"""Returns the size of a file in bytes.
Args:
path: a string that gives the path of a single file.
"""
if path.startswith('gs://'):
return gcsio.GcsIO().size(path)
else:
return os.path.getsize(path)
def rename(src, dest):
if src.startswith('gs://'):
if not dest.startswith('gs://'):
raise ValueError('Destination %r must be GCS path.', dest)
gcsio.GcsIO().rename(src, dest)
else:
try:
os.rename(src, dest)
except OSError as err:
raise IOError(err)
def rmdir(path):
if path.startswith('gs://'):
gcs = gcsio.GcsIO()
if not path.endswith('/'):
path += '/'
# TODO: Threadpool?
for entry in gcs.glob(path + '*'):
gcs.delete(entry)
else:
try:
shutil.rmtree(path)
except OSError as err:
raise IOError(err)
def copytree(src, dest):
if src.startswith('gs://'):
if not dest.startswith('gs://'):
raise ValueError('Destination %r must be GCS path.', dest)
assert src.endswith('/'), src
assert dest.endswith('/'), dest
gcsio.GcsIO().copytree(src, dest)
else:
try:
if os.path.exists(dest):
shutil.rmtree(dest)
shutil.copytree(src, dest)
except OSError as err:
raise IOError(err)
def open(path,
mode,
mime_type='application/octet-stream',
compression_type=CompressionTypes.AUTO):
if compression_type == CompressionTypes.AUTO:
compression_type = CompressionTypes.detect_compression_type(path)
elif not CompressionTypes.is_valid_compression_type(compression_type):
raise TypeError(
'compression_type must be CompressionType object but '
'was %s' % type(compression_type))
if path.startswith('gs://'):
raw_file = gcsio.GcsIO().open(path,
mode,
mime_type=CompressionTypes.mime_type(
compression_type, mime_type))
else:
raw_file = open(path, mode)
if compression_type == CompressionTypes.UNCOMPRESSED:
return raw_file
else:
return _CompressedFile(raw_file, compression_type=compression_type)
def glob(path, limit=None):
if path.startswith('gs://'):
return gcsio.GcsIO().glob(path, limit)
else:
files = glob.glob(path)
return files[:limit]
def exists(path):
if path.startswith('gs://'):
return gcsio.GcsIO().exists(path)
else:
return os.path.exists(path)