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python-stdlib

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_fix.py

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import sys, os

# Delay import _tkinter until we have set TCL_LIBRARY,

# so that Tcl_FindExecutable has a chance to locate its

# encoding directory.

# Unfortunately, we cannot know the TCL_LIBRARY directory

# if we don't know the tcl version, which we cannot find out

# without import Tcl. Fortunately, Tcl will itself look in

# <TCL_LIBRARY>\..\tcl<TCL_VERSION>, so anything close to

# the real Tcl library will do.

# Expand symbolic links on Vista

try:

import ctypes

ctypes.windll.kernel32.GetFinalPathNameByHandleW

except (ImportError, AttributeError):

def convert_path(s):

return s

else:

def convert_path(s):

if isinstance(s, bytes):

s = s.decode("mbcs")

hdir = ctypes.windll.kernel32.\

CreateFileW(s, 0x80, # FILE_READ_ATTRIBUTES

1, # FILE_SHARE_READ

None, 3, # OPEN_EXISTING

0x02000000, # FILE_FLAG_BACKUP_SEMANTICS

None)

if hdir == -1:

# Cannot open directory, give up

return s

buf = ctypes.create_unicode_buffer("", 32768)

res = ctypes.windll.kernel32.\

GetFinalPathNameByHandleW(hdir, buf, len(buf),

0) # VOLUME_NAME_DOS

ctypes.windll.kernel32.CloseHandle(hdir)

if res == 0:

# Conversion failed (e.g. network location)

return s

s = buf[:res]

# Ignore leading \\?\

if s.startswith("\\\\?\\"):

s = s[4:]

if s.startswith("UNC"):

s = "\\" + s[3:]

return s

prefix = os.path.join(sys.base_prefix,"tcl")

if not os.path.exists(prefix):

# devdir/../tcltk/lib

prefix = os.path.join(sys.base_prefix, os.path.pardir, "tcltk", "lib")

prefix = os.path.abspath(prefix)

# if this does not exist, no further search is needed

if os.path.exists(prefix):

prefix = convert_path(prefix)

if "TCL_LIBRARY" not in os.environ:

for name in os.listdir(prefix):

if name.startswith("tcl"):

tcldir = os.path.join(prefix,name)

if os.path.isdir(tcldir):

os.environ["TCL_LIBRARY"] = tcldir

# Compute TK_LIBRARY, knowing that it has the same version

# as Tcl

import _tkinter

ver = str(_tkinter.TCL_VERSION)

if "TK_LIBRARY" not in os.environ:

v = os.path.join(prefix, 'tk'+ver)

if os.path.exists(os.path.join(v, "tclIndex")):

os.environ['TK_LIBRARY'] = v

# We don't know the Tix version, so we must search the entire

# directory

if "TIX_LIBRARY" not in os.environ:

for name in os.listdir(prefix):

if name.startswith("tix"):

tixdir = os.path.join(prefix,name)

if os.path.isdir(tixdir):

os.environ["TIX_LIBRARY"] = tixdir