1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
"""Pathname and path-related operations for the Macintosh."""
import os
from stat import *
import genericpath
from genericpath import *
__all__ = ["normcase","isabs","join","splitdrive","split","splitext",
"basename","dirname","commonprefix","getsize","getmtime",
"getatime","getctime", "islink","exists","lexists","isdir","isfile",
"expanduser","expandvars","normpath","abspath",
"curdir","pardir","sep","pathsep","defpath","altsep","extsep",
"devnull","realpath","supports_unicode_filenames"]
# strings representing various path-related bits and pieces
# These are primarily for export; internally, they are hardcoded.
curdir = ':'
pardir = '::'
extsep = '.'
sep = ':'
pathsep = '\n'
defpath = ':'
altsep = None
devnull = 'Dev:Null'
def _get_colon(path):
if isinstance(path, bytes):
return b':'
else:
return ':'
# Normalize the case of a pathname. Dummy in Posix, but <s>.lower() here.
def normcase(path):
return path.lower()
def isabs(s):
"""Return true if a path is absolute.
On the Mac, relative paths begin with a colon,
but as a special case, paths with no colons at all are also relative.
Anything else is absolute (the string up to the first colon is the
volume name)."""
colon = _get_colon(s)
return colon in s and s[:1] != colon
def join(s, *p):
colon = _get_colon(s)
path = s
for t in p:
if (not s) or isabs(t):
path = t
continue
if t[:1] == colon:
t = t[1:]
if colon not in path:
path = colon + path
if path[-1:] != colon:
path = path + colon
path = path + t
return path
def split(s):
"""Split a pathname into two parts: the directory leading up to the final
bit, and the basename (the filename, without colons, in that directory).
The result (s, t) is such that join(s, t) yields the original argument."""
colon = _get_colon(s)
if colon not in s: return s[:0], s
col = 0
for i in range(len(s)):
if s[i:i+1] == colon: col = i + 1
path, file = s[:col-1], s[col:]
if path and not colon in path:
path = path + colon
return path, file
def splitext(p):
if isinstance(p, bytes):
return genericpath._splitext(p, b':', altsep, b'.')
else:
return genericpath._splitext(p, sep, altsep, extsep)
splitext.__doc__ = genericpath._splitext.__doc__
def splitdrive(p):
"""Split a pathname into a drive specification and the rest of the
path. Useful on DOS/Windows/NT; on the Mac, the drive is always
empty (don't use the volume name -- it doesn't have the same
syntactic and semantic oddities as DOS drive letters, such as there
being a separate current directory per drive)."""
return p[:0], p
# Short interfaces to split()
def dirname(s): return split(s)[0]
def basename(s): return split(s)[1]
def ismount(s):
if not isabs(s):
return False
components = split(s)
return len(components) == 2 and not components[1]
def islink(s):
"""Return true if the pathname refers to a symbolic link."""
try:
import Carbon.File
return Carbon.File.ResolveAliasFile(s, 0)[2]
except:
return False
# Is `stat`/`lstat` a meaningful difference on the Mac? This is safe in any
# case.
def lexists(path):
"""Test whether a path exists. Returns True for broken symbolic links"""
try:
st = os.lstat(path)
except os.error:
return False
return True
def expandvars(path):
"""Dummy to retain interface-compatibility with other operating systems."""
return path
def expanduser(path):
"""Dummy to retain interface-compatibility with other operating systems."""
return path
class norm_error(Exception):
"""Path cannot be normalized"""
def normpath(s):
"""Normalize a pathname. Will return the same result for
equivalent paths."""
colon = _get_colon(s)
if colon not in s:
return colon + s
comps = s.split(colon)
i = 1
while i < len(comps)-1:
if not comps[i] and comps[i-1]:
if i > 1:
del comps[i-1:i+1]
i = i - 1
else:
# best way to handle this is to raise an exception
raise norm_error('Cannot use :: immediately after volume name')
else:
i = i + 1
s = colon.join(comps)
# remove trailing ":" except for ":" and "Volume:"
if s[-1:] == colon and len(comps) > 2 and s != colon*len(s):
s = s[:-1]
return s
def abspath(path):
"""Return an absolute path."""
if not isabs(path):
if isinstance(path, bytes):
cwd = os.getcwdb()
else:
cwd = os.getcwd()
path = join(cwd, path)
return normpath(path)
# realpath is a no-op on systems without islink support
def realpath(path):
path = abspath(path)
try:
import Carbon.File
except ImportError:
return path
if not path:
return path
colon = _get_colon(path)
components = path.split(colon)
path = components[0] + colon
for c in components[1:]:
path = join(path, c)
path = Carbon.File.FSResolveAliasFile(path, 1)[0].as_pathname()
return path
supports_unicode_filenames = False
|
