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Rearrange modules because of single-version-externally-managed

lector/KindleUnpack/unipath.py

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab
+
+# Copyright (c) 2014 Kevin B. Hendricks, John Schember, and Doug Massay
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+# conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+# of conditions and the following disclaimer in the documentation and/or other materials
+# provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+# SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+# WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from __future__ import unicode_literals, division, absolute_import, print_function
+from .compatibility_utils import PY2, text_type, binary_type
+
+import sys
+import os
+
+# utility routines to convert all paths to be full unicode
+
+# Under Python 2, if a bytestring, try to convert it to unicode using sys.getfilesystemencoding
+# Under Python 3, if bytes, try to convert it to unicode using os.fsencode() to decode it
+
+# Mac OS X and Windows will happily support full unicode paths
+# Linux can support full unicode paths but allows arbitrary byte paths which may be inconsistent with unicode
+
+fsencoding = sys.getfilesystemencoding()
+
+def pathof(s, enc=fsencoding):
+    if s is None:
+        return None
+    if isinstance(s, text_type):
+        return s
+    if isinstance(s, binary_type):
+        try:
+            return s.decode(enc)
+        except:
+            pass
+    return s
+
+def exists(s):
+    return os.path.exists(pathof(s))
+
+def isfile(s):
+    return os.path.isfile(pathof(s))
+
+def isdir(s):
+    return os.path.isdir(pathof(s))
+
+def mkdir(s):
+    return os.mkdir(pathof(s))
+
+def listdir(s):
+    rv = []
+    for file in os.listdir(pathof(s)):
+        rv.append(pathof(file))
+    return rv
+
+def getcwd():
+    if PY2:
+        return os.getcwdu()
+    return os.getcwd()
+
+def walk(top):
+    top = pathof(top)
+    rv = []
+    for base, dnames, names in os.walk(top):
+        base = pathof(base)
+        for name in names:
+            name = pathof(name)
+            rv.append(relpath(os.path.join(base, name), top))
+    return rv
+
+def relpath(path, start=None):
+    return os.path.relpath(pathof(path) , pathof(start))
+
+def abspath(path):
+    return os.path.abspath(pathof(path))