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[r721]: trunk / py3exe / py3exe / mf_metapath.py Maximize Restore History

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#!/usr/bin/python3.3
"""Find modules used by a script, using introspection.
This is a modulefinder that finds modules using sys.meta_path, so it
should (eventually) be able to handle modules imported even from
zipped eggs, or other 'strange' mechanisms.
It requires Python 3.3 or later because it uses importlib.
Currently is suffers from bugs in Python 3.3.0.
"""
import dis
import importlib
import importlib.machinery
import marshal
import os
import sys
import types
import struct
# XXX Clean up once str8's cstor matches bytes.
LOAD_CONST = bytes([dis.opname.index('LOAD_CONST')])
IMPORT_NAME = bytes([dis.opname.index('IMPORT_NAME')])
STORE_NAME = bytes([dis.opname.index('STORE_NAME')])
STORE_GLOBAL = bytes([dis.opname.index('STORE_GLOBAL')])
STORE_OPS = [STORE_NAME, STORE_GLOBAL]
HAVE_ARGUMENT = bytes([dis.HAVE_ARGUMENT])
# Modulefinder does a good job at simulating Python's, but it can not
# handle __path__ modifications packages make at runtime. Therefore there
# is a mechanism whereby you can register extra paths in this map for a
# package, and it will be honored.
# Note this is a mapping is lists of paths.
packagePathMap = {}
# A Public interface
def AddPackagePath(packagename, path):
packagePathMap.setdefault(packagename, []).append(path)
replacePackageMap = {}
# This ReplacePackage mechanism allows modulefinder to work around
# situations in which a package injects itself under the name
# of another package into sys.modules at runtime by calling
# ReplacePackage("real_package_name", "faked_package_name")
# before running ModuleFinder.
def ReplacePackage(oldname, newname):
replacePackageMap[oldname] = newname
################################################################
if sys.version_info[:3] == (3, 3, 0):
# Work around Python bug #17098:
# Set __loader__ on modules imported by the C level
for name in sys.builtin_module_names + ("_frozen_importlib",):
m = __import__(name)
try:
m.__loader__
except AttributeError:
m.__loader__ = importlib.machinery.BuiltinImporter
################################################################
class Module:
def __init__(self, name, loader):
self.__name__ = name
self.__file__ = loader.path
if loader.is_package():
# As per comment at top of file, simulate runtime __path__ additions.
self.__path__ = [os.path.dirname(loader.path)] + packagePathMap.get(name, [])
else:
self.__path__ = None
self.__code__ = loader.get_code()
self.__loader__ = loader
# The set of global names that are assigned to in the module.
# This includes those names imported through starimports of
# Python modules.
self.globalnames = {}
# The set of starimports this module did that could not be
# resolved, ie. a starimport from a non-Python module.
self.starimports = {}
def __repr__(self):
s = "Module(%r" % (self.__name__,)
if self.__file__ is not None:
s = s + ", %r" % (self.__file__,)
if self.__path__ is not None:
s = s + ", %r" % (self.__path__,)
s = s + ")"
return s
class LoaderAdapter:
"""This class adapts the PEP 302 loaders to a convenient and
extended interface. """
def __init__(self, imp_loader, name, path):
self._imp_loader = imp_loader
self.name = name
self.path = getattr(imp_loader, "path", None)
import zipimport
if isinstance(imp_loader, zipimport.zipimporter):
self.path = imp_loader.get_filename(self.name)
def is_package(self):
return self._imp_loader.is_package(self.name)
def get_code(self):
return self._imp_loader.get_code(self.name)
def get_source(self):
return self._imp_loader.get_source(self.name)
def adapt_loader(name, path, loader=None):
"""Wrap the passed loader, or the loader returned from
importlib.find_loader(), into a LoaderAdapter instance, or return
None if no loader is found. """
ldr = importlib.find_loader(name, path)
if ldr is None:
return None
return LoaderAdapter(ldr, name, path)
class ModuleFinder:
def __init__(self, path=None, debug=0, excludes=[], replace_paths=[]):
if path is None:
path = sys.path
self.path = path
self.modules = {}
self.badmodules = {}
self.debug = debug
self.indent = 0
self.excludes = excludes
self.replace_paths = replace_paths
self.processed_paths = [] # Used in debugging only
def msg(self, level, str, *args):
if level <= self.debug:
for i in range(self.indent):
print(" ", end=' ')
print(str, end=' ')
for arg in args:
print(repr(arg), end=' ')
print()
def msgin(self, *args):
level = args[0]
if level <= self.debug:
self.indent = self.indent + 1
self.msg(*args)
def msgout(self, *args):
level = args[0]
if level <= self.debug:
self.indent = self.indent - 1
self.msg(*args)
def run_script(self, pathname):
self.msg(2, "run_script", pathname)
dir, name = os.path.split(pathname)
name, ext = os.path.splitext(name)
loader = adapt_loader(name, [dir])
if loader is None:
raise ImportError("could run script {!r}".format(pathname))
self.load_module('__main__', loader)
def load_file(self, pathname):
dir, name = os.path.split(pathname)
name, ext = os.path.splitext(name)
self.msg(2, "load_file", pathname)
loader = adapt_loader(name, [dir])
if loader is None:
raise ImportError("could not load file {!r}".format(pathname))
self.load_module(name, loader)
def import_hook(self, name, caller=None, fromlist=None, level=-1):
self.msg(3, "import_hook", name, caller, fromlist, level)
parent = self.determine_parent(caller, level=level)
q, tail = self.find_head_package(parent, name)
m = self.load_tail(q, tail)
if not fromlist:
return q
if m.__path__:
self.ensure_fromlist(m, fromlist)
return None
def determine_parent(self, caller, level=-1):
self.msgin(4, "determine_parent", caller, level)
if not caller or level == 0:
self.msgout(4, "determine_parent -> None")
return None
pname = caller.__name__
if level >= 1: # relative import
if caller.__path__:
level -= 1
if level == 0:
parent = self.modules[pname]
assert parent is caller
self.msgout(4, "determine_parent ->", parent)
return parent
if pname.count(".") < level:
raise ImportError("relative importpath too deep")
pname = ".".join(pname.split(".")[:-level])
parent = self.modules[pname]
self.msgout(4, "determine_parent ->", parent)
return parent
if caller.__path__:
parent = self.modules[pname]
assert caller is parent
self.msgout(4, "determine_parent ->", parent)
return parent
if '.' in pname:
i = pname.rfind('.')
pname = pname[:i]
parent = self.modules[pname]
assert parent.__name__ == pname
self.msgout(4, "determine_parent ->", parent)
return parent
self.msgout(4, "determine_parent -> None")
return None
def find_head_package(self, parent, name):
self.msgin(4, "find_head_package", parent, name)
if '.' in name:
i = name.find('.')
head = name[:i]
tail = name[i+1:]
else:
head = name
tail = ""
if parent:
qname = "%s.%s" % (parent.__name__, head)
else:
qname = head
q = self.import_module(head, qname, parent)
if q:
self.msgout(4, "find_head_package ->", (q, tail))
return q, tail
if parent:
qname = head
parent = None
q = self.import_module(head, qname, parent)
if q:
self.msgout(4, "find_head_package ->", (q, tail))
return q, tail
self.msgout(4, "raise ImportError: No module named", qname)
raise ImportError("No module named " + qname)
def load_tail(self, q, tail):
self.msgin(4, "load_tail", q, tail)
m = q
while tail:
i = tail.find('.')
if i < 0: i = len(tail)
head, tail = tail[:i], tail[i+1:]
mname = "%s.%s" % (m.__name__, head)
m = self.import_module(head, mname, m)
if not m:
self.msgout(4, "raise ImportError: No module named", mname)
raise ImportError("No module named " + mname)
self.msgout(4, "load_tail ->", m)
return m
def ensure_fromlist(self, m, fromlist, recursive=0):
self.msg(4, "ensure_fromlist", m, fromlist, recursive)
for sub in fromlist:
if sub == "*":
if not recursive:
all = self.find_all_submodules(m)
if all:
self.ensure_fromlist(m, all, 1)
elif not hasattr(m, sub):
subname = "%s.%s" % (m.__name__, sub)
submod = self.import_module(sub, subname, m)
if not submod:
raise ImportError("No module named " + subname)
def find_all_submodules(self, m):
if not m.__path__:
return
modules = {}
# 'suffixes' used to be a list hardcoded to [".py", ".pyc", ".pyo"].
# But we must also collect Python extension modules - although
# we cannot separate normal dlls from Python extensions.
suffixes = []
suffixes += importlib.machinery.EXTENSION_SUFFIXES[:]
suffixes += importlib.machinery.SOURCE_SUFFIXES[:]
suffixes += importlib.machinery.BYTECODE_SUFFIXES[:]
for dir in m.__path__:
try:
names = os.listdir(dir)
except OSError:
self.msg(2, "can't list directory", dir)
continue
for name in names:
mod = None
for suff in suffixes:
n = len(suff)
if name[-n:] == suff:
mod = name[:-n]
break
if mod and mod != "__init__":
modules[mod] = mod
return modules.keys()
def import_module(self, partname, fqname, parent):
self.msgin(3, "import_module", partname, fqname, parent)
if fqname in self.modules:
m = self.modules[fqname]
self.msgout(3, "import_module ->", m)
return m
if fqname in self.badmodules:
self.msgout(3, "import_module -> None")
return None
if parent and parent.__path__ is None:
self.msgout(3, "import_module -> None")
return None
loader = self.find_module(partname,
parent and parent.__path__, parent)
if loader is None:
self.msgout(3, "import_module ->", None)
return None
m = self.load_module(fqname, loader)
if parent:
setattr(parent, partname, m)
self.msgout(3, "import_module ->", m)
return m
def load_module(self, fqname, loader):
assert loader is not None
is_pkg = loader.is_package()
self.msgin(2, "load_package" if is_pkg else "load_module",
fqname, loader)
m = self.add_module(fqname, loader)
self.msgout(2, "load_package" if is_pkg else "load_module", m)
return m
def _add_badmodule(self, name, caller):
if name not in self.badmodules:
self.badmodules[name] = {}
if caller:
self.badmodules[name][caller.__name__] = 1
else:
self.badmodules[name]["-"] = 1
def _safe_import_hook(self, name, caller, fromlist, level=-1):
# wrapper for self.import_hook() that won't raise ImportError
if name in self.badmodules:
self._add_badmodule(name, caller)
return
try:
self.import_hook(name, caller, level=level)
except ImportError as msg:
self.msg(2, "ImportError:", str(msg))
self._add_badmodule(name, caller)
else:
if fromlist:
for sub in fromlist:
if sub in self.badmodules:
self._add_badmodule(sub, caller)
continue
try:
self.import_hook(name, caller, [sub], level=level)
except ImportError as msg:
self.msg(2, "ImportError:", str(msg))
fullname = name + "." + sub
self._add_badmodule(fullname, caller)
def scan_opcodes(self, co,
unpack = struct.unpack):
# Scan the code, and yield 'interesting' opcode combinations
# Version for Python 2.4 and older
code = co.co_code
names = co.co_names
consts = co.co_consts
while code:
c = code[0]
if c in STORE_OPS:
oparg, = unpack('<H', code[1:3])
yield "store", (names[oparg],)
code = code[3:]
continue
if c == LOAD_CONST and code[3] == IMPORT_NAME:
oparg_1, oparg_2 = unpack('<xHxH', code[:6])
yield "import", (consts[oparg_1], names[oparg_2])
code = code[6:]
continue
if c >= HAVE_ARGUMENT:
code = code[3:]
else:
code = code[1:]
def scan_opcodes_25(self, co,
unpack = struct.unpack):
# Scan the code, and yield 'interesting' opcode combinations
# Python 2.5 version (has absolute and relative imports)
code = co.co_code
names = co.co_names
consts = co.co_consts
LOAD_LOAD_AND_IMPORT = LOAD_CONST + LOAD_CONST + IMPORT_NAME
while code:
c = bytes([code[0]])
if c in STORE_OPS:
oparg, = unpack('<H', code[1:3])
yield "store", (names[oparg],)
code = code[3:]
continue
if code[:9:3] == LOAD_LOAD_AND_IMPORT:
oparg_1, oparg_2, oparg_3 = unpack('<xHxHxH', code[:9])
level = consts[oparg_1]
if level == 0: # absolute import
yield "absolute_import", (consts[oparg_2], names[oparg_3])
else: # relative import
yield "relative_import", (level, consts[oparg_2], names[oparg_3])
code = code[9:]
continue
if c >= HAVE_ARGUMENT:
code = code[3:]
else:
code = code[1:]
def scan_code(self, co, m):
code = co.co_code
if sys.version_info >= (2, 5):
scanner = self.scan_opcodes_25
else:
scanner = self.scan_opcodes
for what, args in scanner(co):
if what == "store":
name, = args
m.globalnames[name] = 1
elif what == "absolute_import":
fromlist, name = args
have_star = 0
if fromlist is not None:
if "*" in fromlist:
have_star = 1
fromlist = [f for f in fromlist if f != "*"]
self._safe_import_hook(name, m, fromlist, level=0)
if have_star:
# We've encountered an "import *". If it is a Python module,
# the code has already been parsed and we can suck out the
# global names.
mm = None
if m.__path__:
# At this point we don't know whether 'name' is a
# submodule of 'm' or a global module. Let's just try
# the full name first.
mm = self.modules.get(m.__name__ + "." + name)
if mm is None:
mm = self.modules.get(name)
if mm is not None:
m.globalnames.update(mm.globalnames)
m.starimports.update(mm.starimports)
if mm.__code__ is None:
m.starimports[name] = 1
else:
m.starimports[name] = 1
elif what == "relative_import":
level, fromlist, name = args
if name:
self._safe_import_hook(name, m, fromlist, level=level)
else:
parent = self.determine_parent(m, level=level)
self._safe_import_hook(parent.__name__, None, fromlist, level=0)
else:
# We don't expect anything else from the generator.
raise RuntimeError(what)
for c in co.co_consts:
if isinstance(c, type(co)):
self.scan_code(c, m)
def add_module(self, fqname, loader):
if fqname in self.modules:
return self.modules[fqname]
self.modules[fqname] = m = Module(fqname, loader)
if m.__code__:
if self.replace_paths:
m.__code__ = self.replace_paths_in_code(m.__code__)
self.scan_code(m.__code__, m)
return m
def find_module(self, name, path, parent=None):
if parent is not None:
# assert path is not None
fullname = parent.__name__+'.'+name
else:
fullname = name
if fullname in self.excludes:
self.msgout(3, "find_module -> Excluded", fullname)
raise ImportError(name)
if path is None:
# look for builtin modules on an empty path
ldr = adapt_loader(fullname, [])
if ldr:
return ldr
# no builtin, search again with self.path (which is our sys.path)
path = self.path
return adapt_loader(fullname, path)
def report(self):
"""Print a report to stdout, listing the found modules with their
paths, as well as modules that are missing, or seem to be missing.
"""
print()
print(" %-25s %s" % ("Name", "File"))
print(" %-25s %s" % ("----", "----"))
# Print modules found
keys = sorted(self.modules.keys())
for key in keys:
m = self.modules[key]
if m.__path__:
print("P", end=' ')
else:
print("m", end=' ')
print("%-25s" % key, m.__file__ or "")
# Print missing modules
missing, maybe = self.any_missing_maybe()
if missing:
print()
print("Missing modules:")
for name in missing:
mods = sorted(self.badmodules[name].keys())
print("?", name, "imported from", ', '.join(mods))
# Print modules that may be missing, but then again, maybe not...
if maybe:
print()
print("Submodules thay appear to be missing, but could also be", end=' ')
print("global names in the parent package:")
for name in maybe:
mods = sorted(self.badmodules[name].keys())
print("?", name, "imported from", ', '.join(mods))
def any_missing(self):
"""Return a list of modules that appear to be missing. Use
any_missing_maybe() if you want to know which modules are
certain to be missing, and which *may* be missing.
"""
missing, maybe = self.any_missing_maybe()
return missing + maybe
def any_missing_maybe(self):
"""Return two lists, one with modules that are certainly missing
and one with modules that *may* be missing. The latter names could
either be submodules *or* just global names in the package.
The reason it can't always be determined is that it's impossible to
tell which names are imported when "from module import *" is done
with an extension module, short of actually importing it.
"""
missing = []
maybe = []
for name in self.badmodules:
if name in self.excludes:
continue
i = name.rfind(".")
if i < 0:
missing.append(name)
continue
subname = name[i+1:]
pkgname = name[:i]
pkg = self.modules.get(pkgname)
if pkg is not None:
if pkgname in self.badmodules[name]:
# The package tried to import this module itself and
# failed. It's definitely missing.
missing.append(name)
elif subname in pkg.globalnames:
# It's a global in the package: definitely not missing.
pass
elif pkg.starimports:
# It could be missing, but the package did an "import *"
# from a non-Python module, so we simply can't be sure.
maybe.append(name)
else:
# It's not a global in the package, the package didn't
# do funny star imports, it's very likely to be missing.
# The symbol could be inserted into the package from the
# outside, but since that's not good style we simply list
# it missing.
missing.append(name)
else:
missing.append(name)
missing.sort()
maybe.sort()
return missing, maybe
def replace_paths_in_code(self, co):
new_filename = original_filename = os.path.normpath(co.co_filename)
for f, r in self.replace_paths:
if original_filename.startswith(f):
new_filename = r + original_filename[len(f):]
break
if self.debug and original_filename not in self.processed_paths:
if new_filename != original_filename:
self.msgout(2, "co_filename %r changed to %r" \
% (original_filename,new_filename,))
else:
self.msgout(2, "co_filename %r remains unchanged" \
% (original_filename,))
self.processed_paths.append(original_filename)
consts = list(co.co_consts)
for i in range(len(consts)):
if isinstance(consts[i], type(co)):
consts[i] = self.replace_paths_in_code(consts[i])
return types.CodeType(co.co_argcount, co.co_nlocals, co.co_stacksize,
co.co_flags, co.co_code, tuple(consts), co.co_names,
co.co_varnames, new_filename, co.co_name,
co.co_firstlineno, co.co_lnotab,
co.co_freevars, co.co_cellvars)
def test():
"""This test function has a somwhat unusual command line.
mf.py [-d] [-m] [-p path] [-q] [-x exclude] script modules...
-d increase debug level
-m script name is followed by module or package names
-p extend searchpath
-q reset debug level
-x exclude module/package
"""
# There also was a bug in the original function in modulefinder,
# which is fixed in this version
# Parse command line
import sys
import getopt
try:
opts, args = getopt.getopt(sys.argv[1:], "dmp:qx:")
except getopt.error as msg:
print(msg)
return
# Process options
debug = 1
domods = 0
addpath = []
exclude = []
for o, a in opts:
if o == '-d':
debug = debug + 1
if o == '-m':
domods = 1
if o == '-p':
addpath = addpath + a.split(os.pathsep)
if o == '-q':
debug = 0
if o == '-x':
exclude.append(a)
# Provide default arguments
if not args:
script = "hello.py"
else:
script = args[0]
args = args[1:] # BUGFIX: This line was missing in the original
# Set the path based on sys.path and the script directory
path = sys.path[:]
path[0] = os.path.dirname(script)
path = addpath + path
if debug > 1:
print("path:")
for item in path:
print(" ", repr(item))
# Create the module finder and turn its crank
mf = ModuleFinder(path, debug, exclude)
for arg in args[:]: # BUGFIX: the original used 'for arg in args[1:]'
if arg == '-m':
domods = 1
continue
if domods:
if arg[-2:] == '.*':
mf.import_hook(arg[:-2], None, ["*"])
else:
mf.import_hook(arg)
else:
mf.load_file(arg)
mf.run_script(script)
mf.report()
return mf # for -i debugging
if __name__ == '__main__':
try:
mf = test()
except KeyboardInterrupt:
print("\n[interrupted]")