mirror of
https://github.com/python/cpython.git
synced 2025-10-31 21:51:50 +00:00
6e1c576a4e
paren. This was there to worm around a stupid XEmacs bug, but since I can't tickle the bug in newer XEmacsen (just tried w/21.4.5) it's possible the problem has been fixed. We shouldn't have to be working around editor bugs anyway. If it crops up again, I'll report it (again) to the XEmacs crowd.
329 lines
10 KiB
Python
329 lines
10 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
|
|
|
|
|
|
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. We also need to special-case the Mac,
|
|
# as file names are allowed on sys.path there.
|
|
if sys.platform != 'mac':
|
|
if dir and not os.path.isdir(dir):
|
|
continue
|
|
else:
|
|
if dir and not os.path.exists(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:] == os.extsep + "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.python.org/%.3s/license.html" % sys.version,
|
|
["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":
|
|
# On Non-Unicode builds this will raise an AttributeError...
|
|
sys.setdefaultencoding(encoding) # Needs Python Unicode build !
|
|
|
|
#
|
|
# 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()
|