diff options
Diffstat (limited to 'lib/python2.7/site.py')
| -rw-r--r-- | lib/python2.7/site.py | 713 |
1 files changed, 713 insertions, 0 deletions
diff --git a/lib/python2.7/site.py b/lib/python2.7/site.py new file mode 100644 index 00000000..a49cfc34 --- /dev/null +++ b/lib/python2.7/site.py @@ -0,0 +1,713 @@ +"""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 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. +It also supports the Debian convention of +lib/python<version>/dist-packages. 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. + +FOR DEBIAN, this sys.path is augmented with directories in /usr/local. +Local addons go into /usr/local/lib/python<version>/site-packages +(resp. /usr/local/lib/site-python), Debian addons install into +/usr/{lib,share}/python<version>/dist-packages. + +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 +'#' are skipped. Lines starting with '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/python2.X/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/python2.X/site-packages/bar + /usr/local/lib/python2.X/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 +import os +import __builtin__ +try: + set +except NameError: + from sets import Set as set + +# Prefixes for site-packages; add additional prefixes like /usr/local here +PREFIXES = [sys.prefix, sys.exec_prefix] +# Enable per user site-packages directory +# set it to False to disable the feature or True to force the feature +ENABLE_USER_SITE = None +# for distutils.commands.install +USER_SITE = None +USER_BASE = None + +_is_pypy = hasattr(sys, 'pypy_version_info') +_is_jython = sys.platform[:4] == 'java' +if _is_jython: + ModuleType = type(os) + +def makepath(*paths): + dir = os.path.join(*paths) + if _is_jython and (dir == '__classpath__' or + dir.startswith('__pyclasspath__')): + return dir, dir + dir = os.path.abspath(dir) + return dir, os.path.normcase(dir) + +def abs__file__(): + """Set all module' __file__ attribute to an absolute path""" + for m in sys.modules.values(): + if ((_is_jython and not isinstance(m, ModuleType)) or + hasattr(m, '__loader__')): + # only modules need the abspath in Jython. and don't mess + # with a PEP 302-supplied __file__ + continue + f = getattr(m, '__file__', None) + if f is None: + continue + m.__file__ = os.path.abspath(f) + +def removeduppaths(): + """ Remove duplicate entries from sys.path along with making them + absolute""" + # This ensures that the initial path provided by the interpreter contains + # only absolute pathnames, even if we're running from the build directory. + L = [] + known_paths = set() + for dir in sys.path: + # Filter out duplicate paths (on case-insensitive file systems also + # if they only differ in case); turn relative paths into absolute + # paths. + dir, dircase = makepath(dir) + if not dircase in known_paths: + L.append(dir) + known_paths.add(dircase) + sys.path[:] = L + return known_paths + +# XXX This should not be part of site.py, since it is needed even when +# using the -S option for Python. See http://www.python.org/sf/586680 +def addbuilddir(): + """Append ./build/lib.<platform> in case we're running in the build dir + (especially for Guido :-)""" + from distutils.util import get_platform + s = "build/lib.%s-%.3s" % (get_platform(), sys.version) + if hasattr(sys, 'gettotalrefcount'): + s += '-pydebug' + s = os.path.join(os.path.dirname(sys.path[-1]), s) + sys.path.append(s) + +def _init_pathinfo(): + """Return a set containing all existing directory entries from sys.path""" + d = set() + for dir in sys.path: + try: + if os.path.isdir(dir): + dir, dircase = makepath(dir) + d.add(dircase) + except TypeError: + continue + return d + +def addpackage(sitedir, name, known_paths): + """Add a new path to known_paths by combining sitedir and 'name' or execute + sitedir if it starts with 'import'""" + if known_paths is None: + _init_pathinfo() + reset = 1 + else: + reset = 0 + fullname = os.path.join(sitedir, name) + try: + f = open(fullname, "rU") + except IOError: + return + try: + for line in f: + if line.startswith("#"): + continue + if line.startswith("import"): + exec line + continue + line = line.rstrip() + dir, dircase = makepath(sitedir, line) + if not dircase in known_paths and os.path.exists(dir): + sys.path.append(dir) + known_paths.add(dircase) + finally: + f.close() + if reset: + known_paths = None + return known_paths + +def addsitedir(sitedir, known_paths=None): + """Add 'sitedir' argument to sys.path if missing and handle .pth files in + 'sitedir'""" + if known_paths is None: + known_paths = _init_pathinfo() + reset = 1 + else: + reset = 0 + sitedir, sitedircase = makepath(sitedir) + if not sitedircase in known_paths: + sys.path.append(sitedir) # Add path component + try: + names = os.listdir(sitedir) + except os.error: + return + names.sort() + for name in names: + if name.endswith(os.extsep + "pth"): + addpackage(sitedir, name, known_paths) + if reset: + known_paths = None + return known_paths + +def addsitepackages(known_paths, sys_prefix=sys.prefix, exec_prefix=sys.exec_prefix): + """Add site-packages (and possibly site-python) to sys.path""" + prefixes = [os.path.join(sys_prefix, "local"), sys_prefix] + if exec_prefix != sys_prefix: + prefixes.append(os.path.join(exec_prefix, "local")) + + for prefix in prefixes: + if prefix: + if sys.platform in ('os2emx', 'riscos') or _is_jython: + sitedirs = [os.path.join(prefix, "Lib", "site-packages")] + elif _is_pypy: + sitedirs = [os.path.join(prefix, 'site-packages')] + elif sys.platform == 'darwin' and prefix == sys_prefix: + + if prefix.startswith("/System/Library/Frameworks/"): # Apple's Python + + sitedirs = [os.path.join("/Library/Python", sys.version[:3], "site-packages"), + os.path.join(prefix, "Extras", "lib", "python")] + + else: # any other Python distros on OSX work this way + sitedirs = [os.path.join(prefix, "lib", + "python" + sys.version[:3], "site-packages")] + + elif os.sep == '/': + sitedirs = [os.path.join(prefix, + "lib", + "python" + sys.version[:3], + "site-packages"), + os.path.join(prefix, "lib", "site-python"), + os.path.join(prefix, "python" + sys.version[:3], "lib-dynload")] + lib64_dir = os.path.join(prefix, "lib64", "python" + sys.version[:3], "site-packages") + if (os.path.exists(lib64_dir) and + os.path.realpath(lib64_dir) not in [os.path.realpath(p) for p in sitedirs]): + sitedirs.append(lib64_dir) + try: + # sys.getobjects only available in --with-pydebug build + sys.getobjects + sitedirs.insert(0, os.path.join(sitedirs[0], 'debug')) + except AttributeError: + pass + # Debian-specific dist-packages directories: + sitedirs.append(os.path.join(prefix, "lib", + "python" + sys.version[:3], + "dist-packages")) + sitedirs.append(os.path.join(prefix, "local/lib", + "python" + sys.version[:3], + "dist-packages")) + sitedirs.append(os.path.join(prefix, "lib", "dist-python")) + else: + sitedirs = [prefix, os.path.join(prefix, "lib", "site-packages")] + if sys.platform == 'darwin': + # for framework builds *only* we add the standard Apple + # locations. Currently only per-user, but /Library and + # /Network/Library could be added too + if 'Python.framework' in prefix: + home = os.environ.get('HOME') + if home: + sitedirs.append( + os.path.join(home, + 'Library', + 'Python', + sys.version[:3], + 'site-packages')) + for sitedir in sitedirs: + if os.path.isdir(sitedir): + addsitedir(sitedir, known_paths) + return None + +def check_enableusersite(): + """Check if user site directory is safe for inclusion + + The function tests for the command line flag (including environment var), + process uid/gid equal to effective uid/gid. + + None: Disabled for security reasons + False: Disabled by user (command line option) + True: Safe and enabled + """ + if hasattr(sys, 'flags') and getattr(sys.flags, 'no_user_site', False): + return False + + if hasattr(os, "getuid") and hasattr(os, "geteuid"): + # check process uid == effective uid + if os.geteuid() != os.getuid(): + return None + if hasattr(os, "getgid") and hasattr(os, "getegid"): + # check process gid == effective gid + if os.getegid() != os.getgid(): + return None + + return True + +def addusersitepackages(known_paths): + """Add a per user site-package to sys.path + + Each user has its own python directory with site-packages in the + home directory. + + USER_BASE is the root directory for all Python versions + + USER_SITE is the user specific site-packages directory + + USER_SITE/.. can be used for data. + """ + global USER_BASE, USER_SITE, ENABLE_USER_SITE + env_base = os.environ.get("PYTHONUSERBASE", None) + + def joinuser(*args): + return os.path.expanduser(os.path.join(*args)) + + #if sys.platform in ('os2emx', 'riscos'): + # # Don't know what to put here + # USER_BASE = '' + # USER_SITE = '' + if os.name == "nt": + base = os.environ.get("APPDATA") or "~" + if env_base: + USER_BASE = env_base + else: + USER_BASE = joinuser(base, "Python") + USER_SITE = os.path.join(USER_BASE, + "Python" + sys.version[0] + sys.version[2], + "site-packages") + else: + if env_base: + USER_BASE = env_base + else: + USER_BASE = joinuser("~", ".local") + USER_SITE = os.path.join(USER_BASE, "lib", + "python" + sys.version[:3], + "site-packages") + + if ENABLE_USER_SITE and os.path.isdir(USER_SITE): + addsitedir(USER_SITE, known_paths) + if ENABLE_USER_SITE: + for dist_libdir in ("lib", "local/lib"): + user_site = os.path.join(USER_BASE, dist_libdir, + "python" + sys.version[:3], + "dist-packages") + if os.path.isdir(user_site): + addsitedir(user_site, known_paths) + return known_paths + + + +def setBEGINLIBPATH(): + """The OS/2 EMX port has optional extension modules that do double duty + as DLLs (and must use the .DLL file extension) for other extensions. + The library search path needs to be amended so these will be found + during module import. Use BEGINLIBPATH so that these are at the start + of the library search path. + + """ + dllpath = os.path.join(sys.prefix, "Lib", "lib-dynload") + libpath = os.environ['BEGINLIBPATH'].split(';') + if libpath[-1]: + libpath.append(dllpath) + else: + libpath[-1] = dllpath + os.environ['BEGINLIBPATH'] = ';'.join(libpath) + + +def setquit(): + """Define new built-ins 'quit' and 'exit'. + These are simply strings that display a hint on how to exit. + + """ + if os.sep == ':': + eof = 'Cmd-Q' + elif os.sep == '\\': + eof = 'Ctrl-Z plus Return' + else: + eof = 'Ctrl-D (i.e. EOF)' + + class Quitter(object): + def __init__(self, name): + self.name = name + def __repr__(self): + return 'Use %s() or %s to exit' % (self.name, eof) + def __call__(self, code=None): + # Shells like IDLE catch the SystemExit, but listen when their + # stdin wrapper is closed. + try: + sys.stdin.close() + except: + pass + raise SystemExit(code) + __builtin__.quit = Quitter('quit') + __builtin__.exit = Quitter('exit') + + +class _Printer(object): + """interactive prompt objects for printing the license text, a list of + contributors and the copyright notice.""" + + 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 filename in self.__files: + filename = os.path.join(dir, filename) + try: + fp = file(filename, "rU") + 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 + +def setcopyright(): + """Set 'copyright' and 'credits' in __builtin__""" + __builtin__.copyright = _Printer("copyright", sys.copyright) + if _is_jython: + __builtin__.credits = _Printer( + "credits", + "Jython is maintained by the Jython developers (www.jython.org).") + elif _is_pypy: + __builtin__.credits = _Printer( + "credits", + "PyPy is maintained by the PyPy developers: http://codespeak.net/pypy") + else: + __builtin__.credits = _Printer("credits", """\ + Thanks to CWI, CNRI, BeOpen.com, Zope Corporation 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]) + + +class _Helper(object): + """Define the built-in 'help'. + This is a wrapper around pydoc.help (with a twist). + + """ + + 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) + +def sethelper(): + __builtin__.help = _Helper() + +def aliasmbcs(): + """On Windows, some default encodings are not provided by Python, + while they are always available as "mbcs" in each locale. Make + them usable by aliasing to "mbcs" in such a case.""" + if sys.platform == 'win32': + import locale, codecs + enc = locale.getdefaultlocale()[1] + if enc.startswith('cp'): # "cp***" ? + try: + codecs.lookup(enc) + except LookupError: + import encodings + encodings._cache[enc] = encodings._unknown + encodings.aliases.aliases[enc] = 'mbcs' + +def setencoding(): + """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 ! + + +def execsitecustomize(): + """Run custom site specific code, if available.""" + try: + import sitecustomize + except ImportError: + pass + +def virtual_install_main_packages(): + f = open(os.path.join(os.path.dirname(__file__), 'orig-prefix.txt')) + sys.real_prefix = f.read().strip() + f.close() + pos = 2 + if sys.path[0] == '': + pos += 1 + if sys.platform == 'win32': + paths = [os.path.join(sys.real_prefix, 'Lib'), os.path.join(sys.real_prefix, 'DLLs')] + elif _is_jython: + paths = [os.path.join(sys.real_prefix, 'Lib')] + elif _is_pypy: + cpyver = '%d.%d.%d' % sys.version_info[:3] + paths = [os.path.join(sys.real_prefix, 'lib_pypy'), + os.path.join(sys.real_prefix, 'lib-python', 'modified-%s' % cpyver), + os.path.join(sys.real_prefix, 'lib-python', cpyver)] + else: + paths = [os.path.join(sys.real_prefix, 'lib', 'python'+sys.version[:3])] + lib64_path = os.path.join(sys.real_prefix, 'lib64', 'python'+sys.version[:3]) + if os.path.exists(lib64_path): + paths.append(lib64_path) + # This is hardcoded in the Python executable, but relative to sys.prefix: + plat_path = os.path.join(sys.real_prefix, 'lib', 'python'+sys.version[:3], + 'plat-%s' % sys.platform) + if os.path.exists(plat_path): + paths.append(plat_path) + # This is hardcoded in the Python executable, but + # relative to sys.prefix, so we have to fix up: + for path in list(paths): + tk_dir = os.path.join(path, 'lib-tk') + if os.path.exists(tk_dir): + paths.append(tk_dir) + + # These are hardcoded in the Apple's Python executable, + # but relative to sys.prefix, so we have to fix them up: + if sys.platform == 'darwin': + hardcoded_paths = [os.path.join(sys.real_prefix, 'lib', 'python'+sys.version[:3], module) + for module in ('plat-darwin', 'plat-mac', 'plat-mac/lib-scriptpackages')] + + for path in hardcoded_paths: + if os.path.exists(path): + paths.append(path) + + sys.path.extend(paths) + +def force_global_eggs_after_local_site_packages(): + """ + Force easy_installed eggs in the global environment to get placed + in sys.path after all packages inside the virtualenv. This + maintains the "least surprise" result that packages in the + virtualenv always mask global packages, never the other way + around. + + """ + egginsert = getattr(sys, '__egginsert', 0) + for i, path in enumerate(sys.path): + if i > egginsert and path.startswith(sys.prefix): + egginsert = i + sys.__egginsert = egginsert + 1 + +def virtual_addsitepackages(known_paths): + force_global_eggs_after_local_site_packages() + return addsitepackages(known_paths, sys_prefix=sys.real_prefix) + +def fixclasspath(): + """Adjust the special classpath sys.path entries for Jython. These + entries should follow the base virtualenv lib directories. + """ + paths = [] + classpaths = [] + for path in sys.path: + if path == '__classpath__' or path.startswith('__pyclasspath__'): + classpaths.append(path) + else: + paths.append(path) + sys.path = paths + sys.path.extend(classpaths) + +def execusercustomize(): + """Run custom user specific code, if available.""" + try: + import usercustomize + except ImportError: + pass + + +def main(): + global ENABLE_USER_SITE + virtual_install_main_packages() + abs__file__() + paths_in_sys = removeduppaths() + if (os.name == "posix" and sys.path and + os.path.basename(sys.path[-1]) == "Modules"): + addbuilddir() + if _is_jython: + fixclasspath() + GLOBAL_SITE_PACKAGES = not os.path.exists(os.path.join(os.path.dirname(__file__), 'no-global-site-packages.txt')) + if not GLOBAL_SITE_PACKAGES: + ENABLE_USER_SITE = False + if ENABLE_USER_SITE is None: + ENABLE_USER_SITE = check_enableusersite() + paths_in_sys = addsitepackages(paths_in_sys) + paths_in_sys = addusersitepackages(paths_in_sys) + if GLOBAL_SITE_PACKAGES: + paths_in_sys = virtual_addsitepackages(paths_in_sys) + if sys.platform == 'os2emx': + setBEGINLIBPATH() + setquit() + setcopyright() + sethelper() + aliasmbcs() + setencoding() + execsitecustomize() + if ENABLE_USER_SITE: + execusercustomize() + # 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 + +main() + +def _script(): + help = """\ + %s [--user-base] [--user-site] + + Without arguments print some useful information + With arguments print the value of USER_BASE and/or USER_SITE separated + by '%s'. + + Exit codes with --user-base or --user-site: + 0 - user site directory is enabled + 1 - user site directory is disabled by user + 2 - uses site directory is disabled by super user + or for security reasons + >2 - unknown error + """ + args = sys.argv[1:] + if not args: + print "sys.path = [" + for dir in sys.path: + print " %r," % (dir,) + print "]" + def exists(path): + if os.path.isdir(path): + return "exists" + else: + return "doesn't exist" + print "USER_BASE: %r (%s)" % (USER_BASE, exists(USER_BASE)) + print "USER_SITE: %r (%s)" % (USER_SITE, exists(USER_BASE)) + print "ENABLE_USER_SITE: %r" % ENABLE_USER_SITE + sys.exit(0) + + buffer = [] + if '--user-base' in args: + buffer.append(USER_BASE) + if '--user-site' in args: + buffer.append(USER_SITE) + + if buffer: + print os.pathsep.join(buffer) + if ENABLE_USER_SITE: + sys.exit(0) + elif ENABLE_USER_SITE is False: + sys.exit(1) + elif ENABLE_USER_SITE is None: + sys.exit(2) + else: + sys.exit(3) + else: + import textwrap + print textwrap.dedent(help % (sys.argv[0], os.pathsep)) + sys.exit(10) + +if __name__ == '__main__': + _script() |