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[filesystem] allow to init FileSystem class from another instance

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This commit is contained in:
Cosimo Lupo 2017-07-21 13:23:04 +01:00
parent 07ba88f55a
commit 62cc1c5805
1 changed files with 10 additions and 5 deletions
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15
Lib/ufoLib/filesystem.py
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@ -32,7 +32,7 @@ class FileSystem(object):
def __init__(self, path, mode="r", structure=None):
"""
path can be a path or a fs file system object.
path can be a path or another FileSystem object.
mode can be r or w.
@ -41,11 +41,10 @@ class FileSystem(object):
package: package structure
zip: zipped package
mode and structure are both ignored if a
fs file system object is given for path.
mode and structure are both ignored if a FileSystem
object is given for path.
"""
self._root = None
self._path = "<data stream>"
if isinstance(path, basestring):
self._path = path
if mode == "w":
@ -58,7 +57,7 @@ class FileSystem(object):
structure = existingStructure
elif mode == "r":
if not os.path.exists(path):
raise UFOLibError("The specified UFO doesn't exist.")
raise UFOLibError("The specified UFO doesn't exist: %r" % path)
structure = sniffFileStructure(path)
if structure == "package":
if mode == "w" and not os.path.exists(path):
@ -75,6 +74,12 @@ class FileSystem(object):
raise UFOLibError("The UFO contains more than one root.")
else:
self._root = roots[0]
elif isinstance(path, self.__class__):
self._root = path._root
self._path = path._path
path = path._fs
else:
raise TypeError(path)
self._fs = path
def close(self):