425 lines
13 KiB
Python
425 lines
13 KiB
Python
"""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")
|
|
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))
|
|
self.badmodules[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
|
|
self.badmodules[fullname] = 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:
|
|
print "?", key
|
|
|
|
|
|
def test():
|
|
# Parse command line
|
|
import getopt
|
|
try:
|
|
opts, args = getopt.getopt(sys.argv[1:], "dmp:q")
|
|
except getopt.error, msg:
|
|
print msg
|
|
return
|
|
|
|
# Process options
|
|
debug = 1
|
|
domods = 0
|
|
addpath = []
|
|
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
|
|
|
|
# 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)
|
|
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]"
|