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- """Find modules used by a script, using introspection."""
-
- import dis
- import imp
- import marshal
- import os
- import re
- import string
- import sys
-
- if sys.platform=="win32":
- # On Windows, we can locate modules in the registry with
- # the help of the win32api package.
- try:
- import win32api
- except ImportError:
- print "The win32api module is not available - modules listed"
- print "in the registry will not be found."
- win32api = None
-
-
- IMPORT_NAME = dis.opname.index('IMPORT_NAME')
- IMPORT_FROM = dis.opname.index('IMPORT_FROM')
-
- # 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 honoured.
-
- # Note this is a mapping is lists of paths.
- packagePathMap = {}
-
- # A Public interface
- def AddPackagePath(packagename, path):
- paths = packagePathMap.get(packagename, [])
- paths.append(path)
- packagePathMap[packagename] = paths
-
- class Module:
-
- def __init__(self, name, file=None, path=None):
- self.__name__ = name
- self.__file__ = file
- self.__path__ = path
- self.__code__ = None
-
- def __repr__(self):
- s = "Module(%s" % `self.__name__`
- if self.__file__ is not None:
- s = s + ", %s" % `self.__file__`
- if self.__path__ is not None:
- s = s + ", %s" % `self.__path__`
- s = s + ")"
- return s
-
-
- class ModuleFinder:
-
- def __init__(self, path=None, debug=0, excludes = []):
- if path is None:
- path = sys.path
- self.path = path
- self.modules = {}
- self.badmodules = {}
- self.debug = debug
- self.indent = 0
- self.excludes = excludes
-
- def msg(self, level, str, *args):
- if level <= self.debug:
- for i in range(self.indent):
- print " ",
- print str,
- for arg in args:
- print repr(arg),
- print
-
- def msgin(self, *args):
- level = args[0]
- if level <= self.debug:
- self.indent = self.indent + 1
- apply(self.msg, args)
-
- def msgout(self, *args):
- level = args[0]
- if level <= self.debug:
- self.indent = self.indent - 1
- apply(self.msg, args)
-
- def run_script(self, pathname):
- self.msg(2, "run_script", pathname)
- fp = open(pathname)
- stuff = ("", "r", imp.PY_SOURCE)
- self.load_module('__main__', fp, pathname, stuff)
-
- def load_file(self, pathname):
- dir, name = os.path.split(pathname)
- name, ext = os.path.splitext(name)
- fp = open(pathname)
- stuff = (ext, "r", imp.PY_SOURCE)
- self.load_module(name, fp, pathname, stuff)
-
- def import_hook(self, name, caller=None, fromlist=None):
- self.msg(3, "import_hook", name, caller, fromlist)
- parent = self.determine_parent(caller)
- 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)
-
- def determine_parent(self, caller):
- self.msgin(4, "determine_parent", caller)
- if not caller:
- self.msgout(4, "determine_parent -> None")
- return None
- pname = caller.__name__
- if caller.__path__:
- parent = self.modules[pname]
- assert caller is parent
- self.msgout(4, "determine_parent ->", parent)
- return parent
- if '.' in pname:
- i = string.rfind(pname, '.')
- 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 = string.find(name, '.')
- 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 = string.find(tail, '.')
- 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 = [".py", ".pyc", ".pyo"]
- for dir in m.__path__:
- try:
- names = os.listdir(dir)
- except os.error:
- 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)
- try:
- m = self.modules[fqname]
- except KeyError:
- pass
- else:
- self.msgout(3, "import_module ->", m)
- return m
- if self.badmodules.has_key(fqname):
- self.msgout(3, "import_module -> None")
- self.badmodules[fqname][parent.__name__] = None
- return None
- try:
- fp, pathname, stuff = self.find_module(partname,
- parent and parent.__path__)
- except ImportError:
- self.msgout(3, "import_module ->", None)
- return None
- try:
- m = self.load_module(fqname, fp, pathname, stuff)
- finally:
- if fp: fp.close()
- if parent:
- setattr(parent, partname, m)
- self.msgout(3, "import_module ->", m)
- return m
-
- def load_module(self, fqname, fp, pathname, (suffix, mode, type)):
- self.msgin(2, "load_module", fqname, fp and "fp", pathname)
- if type == imp.PKG_DIRECTORY:
- m = self.load_package(fqname, pathname)
- self.msgout(2, "load_module ->", m)
- return m
- if type == imp.PY_SOURCE:
- co = compile(fp.read()+'\n', pathname, 'exec')
- elif type == imp.PY_COMPILED:
- if fp.read(4) != imp.get_magic():
- self.msgout(2, "raise ImportError: Bad magic number", pathname)
- raise ImportError, "Bad magic number in %s", pathname
- fp.read(4)
- co = marshal.load(fp)
- else:
- co = None
- m = self.add_module(fqname)
- m.__file__ = pathname
- if co:
- m.__code__ = co
- self.scan_code(co, m)
- self.msgout(2, "load_module ->", m)
- return m
-
- def scan_code(self, co, m):
- code = co.co_code
- n = len(code)
- i = 0
- lastname = None
- while i < n:
- c = code[i]
- i = i+1
- op = ord(c)
- if op >= dis.HAVE_ARGUMENT:
- oparg = ord(code[i]) + ord(code[i+1])*256
- i = i+2
- if op == IMPORT_NAME:
- name = lastname = co.co_names[oparg]
- if not self.badmodules.has_key(lastname):
- try:
- self.import_hook(name, m)
- except ImportError, msg:
- self.msg(2, "ImportError:", str(msg))
- if not self.badmodules.has_key(name):
- self.badmodules[name] = {}
- self.badmodules[name][m.__name__] = None
- elif op == IMPORT_FROM:
- name = co.co_names[oparg]
- assert lastname is not None
- if not self.badmodules.has_key(lastname):
- try:
- self.import_hook(lastname, m, [name])
- except ImportError, msg:
- self.msg(2, "ImportError:", str(msg))
- fullname = lastname + "." + name
- if not self.badmodules.has_key(fullname):
- self.badmodules[fullname] = {}
- self.badmodules[fullname][m.__name__] = None
- else:
- lastname = None
- for c in co.co_consts:
- if isinstance(c, type(co)):
- self.scan_code(c, m)
-
- def load_package(self, fqname, pathname):
- self.msgin(2, "load_package", fqname, pathname)
- m = self.add_module(fqname)
- m.__file__ = pathname
- m.__path__ = [pathname]
-
- # As per comment at top of file, simulate runtime __path__ additions.
- m.__path__ = m.__path__ + packagePathMap.get(fqname, [])
-
- fp, buf, stuff = self.find_module("__init__", m.__path__)
- self.load_module(fqname, fp, buf, stuff)
- self.msgout(2, "load_package ->", m)
- return m
-
- def add_module(self, fqname):
- if self.modules.has_key(fqname):
- return self.modules[fqname]
- self.modules[fqname] = m = Module(fqname)
- return m
-
- def find_module(self, name, path):
- if name in self.excludes:
- self.msgout(3, "find_module -> Excluded")
- raise ImportError, name
-
- if path is None:
- if name in sys.builtin_module_names:
- return (None, None, ("", "", imp.C_BUILTIN))
-
- # Emulate the Registered Module support on Windows.
- if sys.platform=="win32" and win32api is not None:
- HKEY_LOCAL_MACHINE = 0x80000002
- try:
- pathname = win32api.RegQueryValue(HKEY_LOCAL_MACHINE, "Software\\Python\\PythonCore\\%s\\Modules\\%s" % (sys.winver, name))
- fp = open(pathname, "rb")
- # XXX - To do - remove the hard code of C_EXTENSION.
- stuff = "", "rb", imp.C_EXTENSION
- return fp, pathname, stuff
- except win32api.error:
- pass
-
- path = self.path
- return imp.find_module(name, path)
-
- def report(self):
- print
- print " %-25s %s" % ("Name", "File")
- print " %-25s %s" % ("----", "----")
- # Print modules found
- keys = self.modules.keys()
- keys.sort()
- for key in keys:
- m = self.modules[key]
- if m.__path__:
- print "P",
- else:
- print "m",
- print "%-25s" % key, m.__file__ or ""
-
- # Print missing modules
- keys = self.badmodules.keys()
- keys.sort()
- for key in keys:
- # ... but not if they were explicitely excluded.
- if key not in self.excludes:
- mods = self.badmodules[key].keys()
- mods.sort()
- print "?", key, "from", string.join(mods, ', ')
-
-
- def test():
- # Parse command line
- import getopt
- try:
- opts, args = getopt.getopt(sys.argv[1:], "dmp:qx:")
- except getopt.error, 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 + string.split(a, 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]
-
- # 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 " ", `item`
-
- # Create the module finder and turn its crank
- mf = ModuleFinder(path, debug, exclude)
- 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()
-
-
- if __name__ == '__main__':
- try:
- test()
- except KeyboardInterrupt:
- print "\n[interrupt]"
-