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Issue #6815: os.path.expandvars() now supports non-ASCII environment

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variables names and values.
This commit is contained in:
Serhiy Storchaka 2014-02-13 10:13:53 +02:00
parent 61e2493b83
commit dbb101909d
5 changed files with 96 additions and 42 deletions
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60
Lib/ntpath.py
View file

@ -362,6 +362,7 @@ def expandvars(path):
percent = b'%'
brace = b'{'
dollar = b'$'
environ = getattr(os, 'environb', None)
else:
if '$' not in path and '%' not in path:
return path
@ -371,6 +372,7 @@ def expandvars(path):
percent = '%'
brace = '{'
dollar = '$'
environ = os.environ
res = path[:0]
index = 0
pathlen = len(path)
@ -399,14 +401,13 @@ def expandvars(path):
index = pathlen - 1
else:
var = path[:index]
if isinstance(path, bytes):
var = var.decode('ascii')
if var in os.environ:
value = os.environ[var]
else:
value = '%' + var + '%'
if isinstance(path, bytes):
value = value.encode('ascii')
try:
if environ is None:
value = os.fsencode(os.environ[os.fsdecode(var)])
else:
value = environ[var]
except KeyError:
value = percent + var + percent
res += value
elif c == dollar: # variable or '$$'
if path[index + 1:index + 2] == dollar:
@ -420,39 +421,40 @@ def expandvars(path):
index = path.index(b'}')
else:
index = path.index('}')
var = path[:index]
if isinstance(path, bytes):
var = var.decode('ascii')
if var in os.environ:
value = os.environ[var]
else:
value = '${' + var + '}'
if isinstance(path, bytes):
value = value.encode('ascii')
res += value
except ValueError:
if isinstance(path, bytes):
res += b'${' + path
else:
res += '${' + path
index = pathlen - 1
else:
var = path[:index]
try:
if environ is None:
value = os.fsencode(os.environ[os.fsdecode(var)])
else:
value = environ[var]
except KeyError:
if isinstance(path, bytes):
value = b'${' + var + b'}'
else:
value = '${' + var + '}'
res += value
else:
var = ''
var = path[:0]
index += 1
c = path[index:index + 1]
while c and c in varchars:
if isinstance(path, bytes):
var += c.decode('ascii')
else:
var += c
var += c
index += 1
c = path[index:index + 1]
if var in os.environ:
value = os.environ[var]
else:
value = '$' + var
if isinstance(path, bytes):
value = value.encode('ascii')
try:
if environ is None:
value = os.fsencode(os.environ[os.fsdecode(var)])
else:
value = environ[var]
except KeyError:
value = dollar + var
res += value
if c:
index -= 1

18
Lib/posixpath.py
View file

@ -300,6 +300,7 @@ def expandvars(path):
search = _varprogb.search
start = b'{'
end = b'}'
environ = getattr(os, 'environb', None)
else:
if '$' not in path:
return path
@ -309,6 +310,7 @@ def expandvars(path):
search = _varprog.search
start = '{'
end = '}'
environ = os.environ
i = 0
while True:
m = search(path, i)
@ -318,18 +320,18 @@ def expandvars(path):
name = m.group(1)
if name.startswith(start) and name.endswith(end):
name = name[1:-1]
if isinstance(name, bytes):
name = str(name, 'ASCII')
if name in os.environ:
try:
if environ is None:
value = os.fsencode(os.environ[os.fsdecode(var)])
else:
value = environ[name]
except KeyError:
i = j
else:
tail = path[j:]
value = os.environ[name]
if isinstance(path, bytes):
value = value.encode('ASCII')
path = path[:i] + value
i = len(path)
path += tail
else:
i = j
return path

30
Lib/test/test_genericpath.py
View file

@ -248,7 +248,6 @@ def test_expandvars(self):
self.assertEqual(expandvars("$[foo]bar"), "$[foo]bar")
self.assertEqual(expandvars("$bar bar"), "$bar bar")
self.assertEqual(expandvars("$?bar"), "$?bar")
self.assertEqual(expandvars("${foo}bar"), "barbar")
self.assertEqual(expandvars("$foo}bar"), "bar}bar")
self.assertEqual(expandvars("${foo"), "${foo")
self.assertEqual(expandvars("${{foo}}"), "baz1}")
@ -261,13 +260,40 @@ def test_expandvars(self):
self.assertEqual(expandvars(b"$[foo]bar"), b"$[foo]bar")
self.assertEqual(expandvars(b"$bar bar"), b"$bar bar")
self.assertEqual(expandvars(b"$?bar"), b"$?bar")
self.assertEqual(expandvars(b"${foo}bar"), b"barbar")
self.assertEqual(expandvars(b"$foo}bar"), b"bar}bar")
self.assertEqual(expandvars(b"${foo"), b"${foo")
self.assertEqual(expandvars(b"${{foo}}"), b"baz1}")
self.assertEqual(expandvars(b"$foo$foo"), b"barbar")
self.assertEqual(expandvars(b"$bar$bar"), b"$bar$bar")
@unittest.skipUnless(support.FS_NONASCII, 'need support.FS_NONASCII')
def test_expandvars_nonascii(self):
if self.pathmodule.__name__ == 'macpath':
self.skipTest('macpath.expandvars is a stub')
expandvars = self.pathmodule.expandvars
def check(value, expected):
self.assertEqual(expandvars(value), expected)
with support.EnvironmentVarGuard() as env:
env.clear()
nonascii = support.FS_NONASCII
env['spam'] = nonascii
env[nonascii] = 'ham' + nonascii
check(nonascii, nonascii)
check('$spam bar', '%s bar' % nonascii)
check('${spam}bar', '%sbar' % nonascii)
check('${%s}bar' % nonascii, 'ham%sbar' % nonascii)
check('$bar%s bar' % nonascii, '$bar%s bar' % nonascii)
check('$spam}bar', '%s}bar' % nonascii)
check(os.fsencode(nonascii), os.fsencode(nonascii))
check(b'$spam bar', os.fsencode('%s bar' % nonascii))
check(b'${spam}bar', os.fsencode('%sbar' % nonascii))
check(os.fsencode('${%s}bar' % nonascii),
os.fsencode('ham%sbar' % nonascii))
check(os.fsencode('$bar%s bar' % nonascii),
os.fsencode('$bar%s bar' % nonascii))
check(b'$spam}bar', os.fsencode('%s}bar' % nonascii))
def test_abspath(self):
self.assertIn("foo", self.pathmodule.abspath("foo"))
with warnings.catch_warnings():

27
Lib/test/test_ntpath.py
View file

@ -22,13 +22,15 @@ def tester(fn, wantResult):
fn = fn.replace('["', '[b"')
fn = fn.replace(", '", ", b'")
fn = fn.replace(', "', ', b"')
fn = os.fsencode(fn).decode('latin1')
fn = fn.encode('ascii', 'backslashreplace').decode('ascii')
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
gotResult = eval(fn)
if isinstance(wantResult, str):
wantResult = wantResult.encode('ascii')
wantResult = os.fsencode(wantResult)
elif isinstance(wantResult, tuple):
wantResult = tuple(r.encode('ascii') for r in wantResult)
wantResult = tuple(os.fsencode(r) for r in wantResult)
gotResult = eval(fn)
if wantResult != gotResult:
@ -223,7 +225,6 @@ def test_expandvars(self):
tester('ntpath.expandvars("$[foo]bar")', "$[foo]bar")
tester('ntpath.expandvars("$bar bar")', "$bar bar")
tester('ntpath.expandvars("$?bar")', "$?bar")
tester('ntpath.expandvars("${foo}bar")', "barbar")
tester('ntpath.expandvars("$foo}bar")', "bar}bar")
tester('ntpath.expandvars("${foo")', "${foo")
tester('ntpath.expandvars("${{foo}}")', "baz1}")
@ -237,6 +238,26 @@ def test_expandvars(self):
tester('ntpath.expandvars("%foo%%bar")', "bar%bar")
tester('ntpath.expandvars("\'%foo%\'%bar")', "\'%foo%\'%bar")
@unittest.skipUnless(support.FS_NONASCII, 'need support.FS_NONASCII')
def test_expandvars_nonascii(self):
def check(value, expected):
tester('ntpath.expandvars(%r)' % value, expected)
with support.EnvironmentVarGuard() as env:
env.clear()
nonascii = support.FS_NONASCII
env['spam'] = nonascii
env[nonascii] = 'ham' + nonascii
check('$spam bar', '%s bar' % nonascii)
check('$%s bar' % nonascii, '$%s bar' % nonascii)
check('${spam}bar', '%sbar' % nonascii)
check('${%s}bar' % nonascii, 'ham%sbar' % nonascii)
check('$spam}bar', '%s}bar' % nonascii)
check('$%s}bar' % nonascii, '$%s}bar' % nonascii)
check('%spam% bar', '%s bar' % nonascii)
check('%{}% bar'.format(nonascii), 'ham%s bar' % nonascii)
check('%spam%bar', '%sbar' % nonascii)
check('%{}%bar'.format(nonascii), 'ham%sbar' % nonascii)
def test_abspath(self):
# ntpath.abspath() can only be used on a system with the "nt" module
# (reasonably), so we protect this test with "import nt". This allows

3
Misc/NEWS
View file

@ -20,6 +20,9 @@ Core and Builtins
Library
-------
- Issue #6815: os.path.expandvars() now supports non-ASCII environment
variables names and values.
- Issue #17671: Fixed a crash when use non-initialized io.BufferedRWPair.
Based on patch by Stephen Tu.