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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):
assert isinstance(s, str) # sys.prefix contains only bytes
udir = s.decode("mbcs")
hdir = ctypes.windll.kernel32.\
CreateFileW(udir, 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(u"", 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].encode("mbcs")
# Ignore leading \\?\
if s.startswith("\\\\?\\"):
s = s[4:]
if s.startswith("UNC"):
s = "\\" + s[3:]
return s
prefix = os.path.join(sys.prefix,"tcl")
if not os.path.exists(prefix):
# devdir/externals/tcltk/lib
tcltk = 'tcltk'
if sys.maxsize > 2**31 - 1:
tcltk = 'tcltk64'
prefix = os.path.join(sys.prefix, "externals", 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