codegraph/codegraph/parser.py at main · xnuinside/codegraph · GitHub

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# 'cut of' code from pythons pyclrb with some additionals

import io

import tokenize

from token import DEDENT, NAME, NEWLINE, NL

from typing import List, Text

__all__ = ["Class", "Function"]

class _Object:

"""Information about Python class or function."""

def __init__(self, name: Text, file: Text, lineno: int, parent: object):

self.name = name

self.file = file

self.lineno = lineno

self.parent = parent if parent else object

self.children = {}

self.endno = None

def _addchild(self, name, obj):

self.children[name] = obj

obj.main = self

def __repr__(self):

return f"{self.name} <{self.__class__.__name__}: Parent {self.parent}>"

def __str__(self):

return f"{self.name} <{self.__class__.__name__}>"

class Import(object):

def __init__(self, modules: List):

self.modules = set()

for module in modules:

self.modules.add(module)

def add(self, module):

self.modules.add(module)

class Function(_Object):

"Information about a Python function, including methods."

def __init__(self, name, file, lineno, parent=None):

_Object.__init__(self, name, file, lineno, parent)

class AsyncFunction(_Object):

"Information about a Python async function, including methods."

def __init__(self, name, file, lineno, parent=None):

_Object.__init__(self, name, file, lineno, parent)

class Class(_Object):

"""Information about a Python class."""

def __init__(self, name, super, file, lineno, parent=None):

_Object.__init__(self, name, file, lineno, parent)

self.super = [] if super is None else super

self.methods = {}

self.async_methods = {}

def _addmethod(self, name, newfunc):

self.methods[name] = newfunc

def _add_async_method(self, name, newfunc):

self.async_methods[name] = newfunc

def _nest_function(ob, func_name, lineno, async_f=False):

"Return a Function after nesting within ob."

newfunc = Function(func_name, ob.file, lineno, ob)

ob._addchild(func_name, newfunc)

if isinstance(ob, Class):

if not async_f:

ob._addmethod(func_name, newfunc)

else:

ob._add_async_method(func_name, newfunc)

return newfunc

def _nest_class(ob, class_name, lineno, super=None):

"Return a Class after nesting within ob."

newclass = Class(class_name, super, ob.file, lineno, ob)

ob._addchild(class_name, newclass)

return newclass

def create_objects_array(fname, source): # noqa: C901

# todo: need to do optimization

"""Return an object list for a particular module."""

tree = []

f = io.StringIO(source)

stack = []

g = tokenize.generate_tokens(f.readline)

try:

new_lines = 0

imports = None

cur_func = None

for tokentype, token, start, _end, _line in g:

if tokentype == DEDENT:

lineno, thisindent = start

# Close previous nested classes and defs.

while stack and stack[-1][1] >= thisindent:

if isinstance(stack[-1][0], _Object):

if getattr(stack[-1][0], "main", None):

stack[-1][0].endno = lineno - 1 - new_lines

else:

stack[-1][0].endno = lineno - 1 - new_lines

del stack[-1]

else:

if tree:

tree[-1].endno = lineno - 1 - new_lines

new_lines = 0

elif tokentype == NL:

new_lines += 1

elif token == "import":

modules = [_line.replace("\n", "").split("import ")[1]]

if not imports:

imports = Import(modules)

else:

for module in modules:

imports.add(module)

elif token == "from":

# Parse "from X import a, b, c" into ["X.a", "X.b", "X.c"]

# Also handles multi-line imports with parentheses

# Collect tokens to build base module path

base_parts = []

for tokentype2, token2, start2, _end2, _line2 in g:

if token2 == "import":

break

if tokentype2 == NAME:

base_parts.append(token2)

elif token2 == ".":

base_parts.append(".")

base_module = "".join(base_parts)

# Collect imported names (handle parentheses for multi-line)

imported_names = []

in_parens = False

current_name = []

alias = None

for tokentype2, token2, start2, _end2, _line2 in g:

if token2 == "(":

in_parens = True

continue

if token2 == ")":

break

if token2 == "," or (tokentype2 == NEWLINE and not in_parens):

if current_name:

name = "".join(current_name)

if alias:

name = f"{name} as {alias}"

alias = None

imported_names.append(name)

current_name = []

if tokentype2 == NEWLINE and not in_parens:

break

continue

if token2 == "as":

# Next NAME token is the alias

for tokentype3, token3, _, _, _ in g:

if tokentype3 == NAME:

alias = token3

break

if token3 in (",", ")", "\n"):

break

continue

if tokentype2 == NAME:

current_name.append(token2)

elif token2 == ".":

current_name.append(".")

if tokentype2 == NL:

continue

# Don't forget the last name

if current_name:

name = "".join(current_name)

if alias:

name = f"{name} as {alias}"

imported_names.append(name)

# Build full module paths

modules = [f"{base_module}.{name}" for name in imported_names if name]

if not imports:

imports = Import(modules)

else:

for module in modules:

imports.add(module)

elif token == "async":

new_lines = 0

lineno, thisindent = start

# Close previous nested classes and defs.

while stack and stack[-1][1] >= thisindent:

del stack[-1]

# next will be def

_, _, _ = next(g)[0:3]

# we need method name

tokentype, func_name, start = next(g)[0:3]

if tokentype != NAME:

continue # Skip def with syntax error.

cur_func = None

if stack:

cur_obj = stack[-1][0]

cur_func = _nest_function(cur_obj, func_name, lineno, async_f=True)

cur_obj.endno = lineno - new_lines

else:

tree.append(AsyncFunction(func_name, fname, lineno))

stack.append((cur_func, thisindent))

elif token == "def":

new_lines = 0

lineno, thisindent = start

# Close previous nested classes and defs.

while stack and stack[-1][1] >= thisindent:

del stack[-1]

tokentype, func_name, start = next(g)[0:3]

if tokentype != NAME:

continue # Skip def with syntax error.

if stack:

cur_obj = stack[-1][0]

cur_func = _nest_function(cur_obj, func_name, lineno)

cur_obj.endno = lineno - new_lines

else:

cur_func = Function(func_name, fname, lineno)

tree.append(cur_func)

if cur_func:

stack.append((cur_func, thisindent))

elif token == "class":

new_lines = 0

lineno, thisindent = start

# Close previous nested classes and defs.

while stack and stack[-1][1] >= thisindent:

del stack[-1]

tokentype, class_name, start = next(g)[0:3]

if tokentype != NAME:

continue

# Parse base classes: class Name(Base1, Base2):

inherit = []

current_base = []

in_parens = False

for tokentype2, token2, start2, _end2, _line2 in g:

if token2 == "(":

in_parens = True

continue

if token2 == ")":

if current_base:

inherit.append("".join(current_base))

break

if token2 == ":":

if current_base:

inherit.append("".join(current_base))

break

if not in_parens:

if token2 == ":":

break

continue

if token2 == ",":

if current_base:

inherit.append("".join(current_base))

current_base = []

continue

if tokentype2 == NAME:

current_base.append(token2)

elif token2 == ".":

current_base.append(".")

if tokentype2 == NL:

continue

if stack:

cur_obj = stack[-1][0]

cur_class = _nest_class(cur_obj, class_name, lineno, inherit)

cur_obj.endno = lineno - new_lines

else:

cur_class = Class(class_name, inherit, fname, lineno)

tree.append(cur_class)

stack.append((cur_class, thisindent))

except StopIteration:

pass

f.close()

if imports:

tree.append(imports)

return tree

codegraph/codegraph/parser.py at main · xnuinside/codegraph · GitHub

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