335 lines
12 KiB
Python
335 lines
12 KiB
Python
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""" This module is keeping track about API informations as well as
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providing some interface to easily access stored data
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"""
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import py
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import sys
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import types
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import inspect
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from py.__.apigen.tracer.description import FunctionDesc, ClassDesc, \
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MethodDesc, Desc
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from py.__.apigen.tracer import model
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sorted = py.builtin.sorted
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class DocStorage(object):
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""" Class storing info about API
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"""
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def consider_call(self, frame, caller_frame, upward_cut_frame=None):
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assert isinstance(frame, py.code.Frame)
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desc = self.find_desc(frame.code, frame.raw.f_locals)
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if desc:
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self.generalize_args(desc, frame)
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desc.consider_call_site(caller_frame, upward_cut_frame)
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desc.consider_start_locals(frame)
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def generalize_args(self, desc, frame):
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args = [arg for key, arg in frame.getargs()]
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#self.call_stack.append((desc, args))
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desc.consider_call([model.guess_type(arg) for arg in args])
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def generalize_retval(self, desc, arg):
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desc.consider_return(model.guess_type(arg))
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def consider_return(self, frame, arg):
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assert isinstance(frame, py.code.Frame)
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desc = self.find_desc(frame.code, frame.raw.f_locals)
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if desc:
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self.generalize_retval(desc, arg)
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desc.consider_end_locals(frame)
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def consider_exception(self, frame, arg):
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desc = self.find_desc(frame.code, frame.raw.f_locals)
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if desc:
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exc_class, value, _ = arg
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desc.consider_exception(exc_class, value)
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def find_desc(self, code, locals):
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try:
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# argh, very fragile specialcasing
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return self.desc_cache[(code.raw,
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locals[code.raw.co_varnames[0]].__class__)]
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except (KeyError, IndexError, AttributeError): # XXX hrmph
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return self.desc_cache.get(code.raw, None)
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#for desc in self.descs.values():
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# if desc.has_code(frame.code.raw):
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# return desc
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#return None
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def make_cache(self):
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self.desc_cache = {}
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for key, desc in self.descs.iteritems():
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self.desc_cache[desc] = desc
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def from_dict(self, _dict, keep_frames = False):
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self.descs = {}
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for key, val in _dict.iteritems():
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to_key, to_val = self.make_desc(key, val)
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if to_key:
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self.descs[to_key] = to_val
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self.make_cache()
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# XXX
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return self
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# XXX: This function becomes slowly outdated and even might go away at some
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# point. The question is whether we want to use tracer.magic or not
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# at all
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def add_desc(self, name, value, **kwargs):
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key = name
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count = 1
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while key in self.descs:
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key = "%s_%d" % (name, count)
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count += 1
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key, desc = self.make_desc(key, value, **kwargs)
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if key:
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self.descs[key] = desc
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self.desc_cache[desc] = desc
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return desc
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else:
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return None
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def make_desc(self, key, value, add_desc=True, **kwargs):
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if isinstance(value, types.FunctionType):
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desc = FunctionDesc(key, value, **kwargs)
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elif isinstance(value, (types.ObjectType, types.ClassType)):
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desc = ClassDesc(key, value, **kwargs)
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# XXX: This is the special case when we do not have __init__
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# in dir(value) for uknown reason. Need to investigate it
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for name in dir(value) + ['__init__']:
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field = getattr(value, name, None)
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if isinstance(field, types.MethodType) and \
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isinstance(field.im_func, types.FunctionType):
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real_name = key + '.' + name
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md = MethodDesc(real_name, field)
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if add_desc: # XXX hack
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self.descs[real_name] = md
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desc.add_method_desc(name, md)
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# Some other fields as well?
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elif isinstance(value, types.MethodType):
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desc = MethodDesc(key, value, **kwargs)
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else:
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desc = Desc(value)
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return (key, desc) # How to do it better? I want a desc to be a key
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# value, but I cannot get full object if I do a lookup
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def from_pkg(self, module, keep_frames=False):
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self.module = module
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defs = module.__package__.exportdefs
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d = {}
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for key, value in defs.iteritems():
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chain = key.split('.')
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base = module
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for elem in chain:
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base = getattr(base, elem)
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if value[1] == '*':
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d.update(self.get_star_import_tree(base, key))
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else:
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d[key] = base
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self.from_dict(d, keep_frames)
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# XXX
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return self
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def get_star_import_tree(self, module, modname):
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""" deal with '*' entries in an initpkg situation """
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ret = {}
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modpath = py.path.local(inspect.getsourcefile(module))
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pkgpath = module.__package__.getpath()
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for objname in dir(module):
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if objname.startswith('_'):
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continue # also skip __*__ attributes
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obj = getattr(module, objname)
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if (isinstance(obj, types.ClassType) or
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isinstance(obj, types.ObjectType)):
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try:
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sourcefile_object = py.path.local(
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inspect.getsourcefile(obj))
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except TypeError:
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continue
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else:
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if sourcefile_object.strpath != modpath.strpath:
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# not in this package
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continue
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dotted_name = '%s.%s' % (modname, objname)
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ret[dotted_name] = obj
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return ret
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def from_module(self, func):
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raise NotImplementedError("From module")
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class AbstractDocStorageAccessor(object):
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def __init__(self):
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raise NotImplementedError("Purely virtual object")
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def get_function_names(self):
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""" Returning names of all functions
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"""
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def get_class_names(self):
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""" Returning names of all classess
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"""
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def get_doc(self, name):
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""" Returning __doc__ of a function
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"""
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def get_function_definition(self, name):
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""" Returns definition of a function (source)
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"""
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def get_function_signature(self, name):
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""" Returns types of a function
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"""
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def get_function_callpoints(self, name):
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""" Returns list of all callpoints
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"""
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def get_module_name(self):
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pass
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def get_class_methods(self, name):
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""" Returns all methods of a class
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"""
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#def get_object_info(self, key):
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#
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def get_module_info(self):
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""" Returns module information
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"""
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class DocStorageAccessor(AbstractDocStorageAccessor):
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""" Set of helper functions to access DocStorage, separated in different
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class to keep abstraction
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"""
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def __init__(self, ds):
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self.ds = ds
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def _get_names(self, filter):
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return [i for i, desc in self.ds.descs.iteritems() if filter(i, desc)]
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def get_function_names(self):
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return sorted(self._get_names(lambda i, desc: type(desc) is
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FunctionDesc))
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def get_class_names(self):
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return sorted(self._get_names(lambda i, desc: isinstance(desc,
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ClassDesc)))
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#def get_function(self, name):
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# return self.ds.descs[name].pyobj
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def get_doc(self, name):
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return self.ds.descs[name].pyobj.__doc__ or "*Not documented*"
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def get_function_definition(self, name):
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desc = self.ds.descs[name]
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assert isinstance(desc, FunctionDesc)
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code = py.code.Code(desc.code)
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return code.fullsource[code.firstlineno]
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def get_function_signature(self, name):
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desc = self.ds.descs[name]
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# we return pairs of (name, type) here
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names = desc.pyobj.func_code.co_varnames[
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:desc.pyobj.func_code.co_argcount]
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types = desc.inputcells
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return zip(names, types), desc.retval
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def get_function_source(self, name):
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desc = self.ds.descs[name]
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try:
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return str(py.code.Source(desc.pyobj))
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except IOError:
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return "Cannot get source"
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def get_function_callpoints(self, name):
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# return list of tuple (filename, fileline, frame)
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return self.ds.descs[name].get_call_sites()
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def get_function_local_changes(self, name):
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return self.ds.descs[name].get_local_changes()
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def get_function_exceptions(self, name):
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return sorted([i.__name__ for i in self.ds.descs[name].exceptions.keys()])
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def get_module_name(self):
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if hasattr(self.ds, 'module'):
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return self.ds.module.__name__
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return "Unknown module"
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def get_class_methods(self, name):
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desc = self.ds.descs[name]
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assert isinstance(desc, ClassDesc)
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return sorted(desc.getfields())
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def get_module_info(self):
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module = getattr(self.ds, 'module', None)
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if module is None:
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return "Lack of module info"
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try:
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retval = module.__doc__ or "*undocumented*"
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retval = module.__package__.description
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retval = module.__package__.long_description
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except AttributeError:
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pass
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return retval
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def get_type_desc(self, _type):
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# XXX We provide only classes here
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if not isinstance(_type, model.SomeClass):
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return None
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# XXX we might want to cache it at some point
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for key, desc in self.ds.descs.iteritems():
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if desc.pyobj == _type.cls:
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return key, 'class', desc.is_degenerated
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return None
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def get_method_origin(self, name):
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method = self.ds.descs[name].pyobj
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cls = method.im_class
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if not cls.__bases__:
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return self.desc_from_pyobj(cls, cls.__name__)
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curr = cls
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while curr:
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for base in curr.__bases__:
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basefunc = getattr(base, method.im_func.func_name, None)
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if (basefunc is not None and hasattr(basefunc, 'im_func') and
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hasattr(basefunc.im_func, 'func_code') and
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basefunc.im_func.func_code is
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method.im_func.func_code):
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curr = base
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break
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else:
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break
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return self.desc_from_pyobj(curr, curr.__name__)
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def get_possible_base_classes(self, name):
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cls = self.ds.descs[name].pyobj
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if not hasattr(cls, '__bases__'):
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return []
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retval = []
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for base in cls.__bases__:
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desc = self.desc_from_pyobj(base, base.__name__)
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if desc is not None:
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retval.append(desc)
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return retval
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def desc_from_pyobj(self, pyobj, name):
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for desc in self.ds.descs.values():
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if isinstance(desc, ClassDesc) and desc.pyobj is pyobj:
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return desc
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# otherwise create empty desc
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key, desc = self.ds.make_desc(name, pyobj, False)
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#self.ds.descs[key] = desc
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desc.is_degenerated = True
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# and make sure we'll not try to link to it directly
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return desc
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def get_obj(self, name):
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return self.ds.descs[name].pyobj
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