329 lines
9.9 KiB
Python
329 lines
9.9 KiB
Python
"""Append module search paths for third-party packages to sys.path.
|
|
|
|
****************************************************************
|
|
* This module is automatically imported during initialization. *
|
|
****************************************************************
|
|
|
|
In earlier versions of Python (up to 1.5a3), scripts or modules that
|
|
needed to use site-specific modules would place ``import site''
|
|
somewhere near the top of their code. Because of the automatic
|
|
import, this is no longer necessary (but code that does it still
|
|
works).
|
|
|
|
This will append site-specific paths to to the module search path. On
|
|
Unix, it starts with sys.prefix and sys.exec_prefix (if different) and
|
|
appends lib/python<version>/site-packages as well as lib/site-python.
|
|
On other platforms (mainly Mac and Windows), it uses just sys.prefix
|
|
\(and sys.exec_prefix, if different, but this is unlikely). The
|
|
resulting directories, if they exist, are appended to sys.path, and
|
|
also inspected for path configuration files.
|
|
|
|
A path configuration file is a file whose name has the form
|
|
<package>.pth; its contents are additional directories (one per line)
|
|
to be added to sys.path. Non-existing directories (or
|
|
non-directories) are never added to sys.path; no directory is added to
|
|
sys.path more than once. Blank lines and lines beginning with
|
|
\code{#} are skipped. Lines starting with \code{import} are executed.
|
|
|
|
For example, suppose sys.prefix and sys.exec_prefix are set to
|
|
/usr/local and there is a directory /usr/local/lib/python1.5/site-packages
|
|
with three subdirectories, foo, bar and spam, and two path
|
|
configuration files, foo.pth and bar.pth. Assume foo.pth contains the
|
|
following:
|
|
|
|
# foo package configuration
|
|
foo
|
|
bar
|
|
bletch
|
|
|
|
and bar.pth contains:
|
|
|
|
# bar package configuration
|
|
bar
|
|
|
|
Then the following directories are added to sys.path, in this order:
|
|
|
|
/usr/local/lib/python1.5/site-packages/bar
|
|
/usr/local/lib/python1.5/site-packages/foo
|
|
|
|
Note that bletch is omitted because it doesn't exist; bar precedes foo
|
|
because bar.pth comes alphabetically before foo.pth; and spam is
|
|
omitted because it is not mentioned in either path configuration file.
|
|
|
|
After these path manipulations, an attempt is made to import a module
|
|
named sitecustomize, which can perform arbitrary additional
|
|
site-specific customizations. If this import fails with an
|
|
ImportError exception, it is silently ignored.
|
|
|
|
"""
|
|
|
|
import sys, os
|
|
|
|
if os.sep==".":
|
|
endsep = "/"
|
|
else:
|
|
endsep = "."
|
|
|
|
|
|
def makepath(*paths):
|
|
dir = os.path.abspath(os.path.join(*paths))
|
|
return dir, os.path.normcase(dir)
|
|
|
|
for m in sys.modules.values():
|
|
if hasattr(m, "__file__") and m.__file__:
|
|
m.__file__ = os.path.abspath(m.__file__)
|
|
del m
|
|
|
|
# This ensures that the initial path provided by the interpreter contains
|
|
# only absolute pathnames, even if we're running from the build directory.
|
|
L = []
|
|
_dirs_in_sys_path = {}
|
|
for dir in sys.path:
|
|
# Filter out paths that don't exist, but leave in the empty string
|
|
# since it's a special case.
|
|
if dir and not os.path.isdir(dir):
|
|
continue
|
|
dir, dircase = makepath(dir)
|
|
if not _dirs_in_sys_path.has_key(dircase):
|
|
L.append(dir)
|
|
_dirs_in_sys_path[dircase] = 1
|
|
sys.path[:] = L
|
|
del dir, L
|
|
|
|
# Append ./build/lib.<platform> in case we're running in the build dir
|
|
# (especially for Guido :-)
|
|
if os.name == "posix" and os.path.basename(sys.path[-1]) == "Modules":
|
|
from distutils.util import get_platform
|
|
s = "build/lib.%s-%.3s" % (get_platform(), sys.version)
|
|
s = os.path.join(os.path.dirname(sys.path[-1]), s)
|
|
sys.path.append(s)
|
|
del get_platform, s
|
|
|
|
def _init_pathinfo():
|
|
global _dirs_in_sys_path
|
|
_dirs_in_sys_path = d = {}
|
|
for dir in sys.path:
|
|
if dir and not os.path.isdir(dir):
|
|
continue
|
|
dir, dircase = makepath(dir)
|
|
d[dircase] = 1
|
|
|
|
def addsitedir(sitedir):
|
|
global _dirs_in_sys_path
|
|
if _dirs_in_sys_path is None:
|
|
_init_pathinfo()
|
|
reset = 1
|
|
else:
|
|
reset = 0
|
|
sitedir, sitedircase = makepath(sitedir)
|
|
if not _dirs_in_sys_path.has_key(sitedircase):
|
|
sys.path.append(sitedir) # Add path component
|
|
try:
|
|
names = os.listdir(sitedir)
|
|
except os.error:
|
|
return
|
|
names.sort()
|
|
for name in names:
|
|
if name[-4:] == endsep + "pth":
|
|
addpackage(sitedir, name)
|
|
if reset:
|
|
_dirs_in_sys_path = None
|
|
|
|
def addpackage(sitedir, name):
|
|
global _dirs_in_sys_path
|
|
if _dirs_in_sys_path is None:
|
|
_init_pathinfo()
|
|
reset = 1
|
|
else:
|
|
reset = 0
|
|
fullname = os.path.join(sitedir, name)
|
|
try:
|
|
f = open(fullname)
|
|
except IOError:
|
|
return
|
|
while 1:
|
|
dir = f.readline()
|
|
if not dir:
|
|
break
|
|
if dir[0] == '#':
|
|
continue
|
|
if dir.startswith("import"):
|
|
exec dir
|
|
continue
|
|
if dir[-1] == '\n':
|
|
dir = dir[:-1]
|
|
dir, dircase = makepath(sitedir, dir)
|
|
if not _dirs_in_sys_path.has_key(dircase) and os.path.exists(dir):
|
|
sys.path.append(dir)
|
|
_dirs_in_sys_path[dircase] = 1
|
|
if reset:
|
|
_dirs_in_sys_path = None
|
|
|
|
prefixes = [sys.prefix]
|
|
if sys.exec_prefix != sys.prefix:
|
|
prefixes.append(sys.exec_prefix)
|
|
for prefix in prefixes:
|
|
if prefix:
|
|
if os.sep == '/':
|
|
sitedirs = [os.path.join(prefix,
|
|
"lib",
|
|
"python" + sys.version[:3],
|
|
"site-packages"),
|
|
os.path.join(prefix, "lib", "site-python")]
|
|
else:
|
|
sitedirs = [prefix, os.path.join(prefix, "lib", "site-packages")]
|
|
for sitedir in sitedirs:
|
|
if os.path.isdir(sitedir):
|
|
addsitedir(sitedir)
|
|
|
|
_dirs_in_sys_path = None
|
|
|
|
|
|
# Define new built-ins 'quit' and 'exit'.
|
|
# These are simply strings that display a hint on how to exit.
|
|
if os.sep == ':':
|
|
exit = 'Use Cmd-Q to quit.'
|
|
elif os.sep == '\\':
|
|
exit = 'Use Ctrl-Z plus Return to exit.'
|
|
else:
|
|
exit = 'Use Ctrl-D (i.e. EOF) to exit.'
|
|
import __builtin__
|
|
__builtin__.quit = __builtin__.exit = exit
|
|
del exit
|
|
|
|
# interactive prompt objects for printing the license text, a list of
|
|
# contributors and the copyright notice.
|
|
class _Printer:
|
|
MAXLINES = 23
|
|
|
|
def __init__(self, name, data, files=(), dirs=()):
|
|
self.__name = name
|
|
self.__data = data
|
|
self.__files = files
|
|
self.__dirs = dirs
|
|
self.__lines = None
|
|
|
|
def __setup(self):
|
|
if self.__lines:
|
|
return
|
|
data = None
|
|
for dir in self.__dirs:
|
|
for file in self.__files:
|
|
file = os.path.join(dir, file)
|
|
try:
|
|
fp = open(file)
|
|
data = fp.read()
|
|
fp.close()
|
|
break
|
|
except IOError:
|
|
pass
|
|
if data:
|
|
break
|
|
if not data:
|
|
data = self.__data
|
|
self.__lines = data.split('\n')
|
|
self.__linecnt = len(self.__lines)
|
|
|
|
def __repr__(self):
|
|
self.__setup()
|
|
if len(self.__lines) <= self.MAXLINES:
|
|
return "\n".join(self.__lines)
|
|
else:
|
|
return "Type %s() to see the full %s text" % ((self.__name,)*2)
|
|
|
|
def __call__(self):
|
|
self.__setup()
|
|
prompt = 'Hit Return for more, or q (and Return) to quit: '
|
|
lineno = 0
|
|
while 1:
|
|
try:
|
|
for i in range(lineno, lineno + self.MAXLINES):
|
|
print self.__lines[i]
|
|
except IndexError:
|
|
break
|
|
else:
|
|
lineno += self.MAXLINES
|
|
key = None
|
|
while key is None:
|
|
key = raw_input(prompt)
|
|
if key not in ('', 'q'):
|
|
key = None
|
|
if key == 'q':
|
|
break
|
|
|
|
__builtin__.copyright = _Printer("copyright", sys.copyright)
|
|
if sys.platform[:4] == 'java':
|
|
__builtin__.credits = _Printer(
|
|
"credits",
|
|
"Jython is maintained by the Jython developers (www.jython.org).")
|
|
else:
|
|
__builtin__.credits = _Printer("credits", """\
|
|
Thanks to CWI, CNRI, BeOpen.com, Digital Creations and a cast of thousands
|
|
for supporting Python development. See www.python.org for more information.""")
|
|
here = os.path.dirname(os.__file__)
|
|
__builtin__.license = _Printer(
|
|
"license", "See http://www.pythonlabs.com/products/python2.0/license.html",
|
|
["LICENSE.txt", "LICENSE"],
|
|
[os.path.join(here, os.pardir), here, os.curdir])
|
|
|
|
|
|
# Define new built-in 'help'.
|
|
# This is a wrapper around pydoc.help (with a twist).
|
|
|
|
class _Helper:
|
|
def __repr__(self):
|
|
return "Type help() for interactive help, " \
|
|
"or help(object) for help about object."
|
|
def __call__(self, *args, **kwds):
|
|
import pydoc
|
|
return pydoc.help(*args, **kwds)
|
|
|
|
__builtin__.help = _Helper()
|
|
|
|
|
|
# Set the string encoding used by the Unicode implementation. The
|
|
# default is 'ascii', but if you're willing to experiment, you can
|
|
# change this.
|
|
|
|
encoding = "ascii" # Default value set by _PyUnicode_Init()
|
|
|
|
if 0:
|
|
# Enable to support locale aware default string encodings.
|
|
import locale
|
|
loc = locale.getdefaultlocale()
|
|
if loc[1]:
|
|
encoding = loc[1]
|
|
|
|
if 0:
|
|
# Enable to switch off string to Unicode coercion and implicit
|
|
# Unicode to string conversion.
|
|
encoding = "undefined"
|
|
|
|
if encoding != "ascii":
|
|
sys.setdefaultencoding(encoding)
|
|
|
|
#
|
|
# Run custom site specific code, if available.
|
|
#
|
|
try:
|
|
import sitecustomize
|
|
except ImportError:
|
|
pass
|
|
|
|
#
|
|
# Remove sys.setdefaultencoding() so that users cannot change the
|
|
# encoding after initialization. The test for presence is needed when
|
|
# this module is run as a script, because this code is executed twice.
|
|
#
|
|
if hasattr(sys, "setdefaultencoding"):
|
|
del sys.setdefaultencoding
|
|
|
|
def _test():
|
|
print "sys.path = ["
|
|
for dir in sys.path:
|
|
print " %s," % `dir`
|
|
print "]"
|
|
|
|
if __name__ == '__main__':
|
|
_test()
|