зеркало из https://github.com/github/codeql.git
Python: Remove `unparse.py`
This commit is contained in:
Taus
Родитель
599f573a4a
Коммит
ef9f99b3be
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@ -5,7 +5,6 @@ py_binary(
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srcs = [
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"make_zips.py",
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"python_tracer.py",
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"unparse.py",
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],
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data = [
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"LICENSE-PSF.md",
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@ -6,7 +6,6 @@
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| `tsg-python/tree-sitter-python` | Y | MIT | Used in `tsg-python` to parse Python files |
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| `tsg-python` | Y | MIT / Apache | This is our own creation, so are free to choose what license it is covered by. |
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| `tree-sitter-graph` | N | MIT / Apache | Used in `tsg-python` to execute files written in the `tree-sitter-graph` language. |
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| `unparse.py` | Y | PSF | Copied and adapted from `Tools/unparse.py` from the `cpython` source code, with attribution. |
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| `imp.py` | Y | PSF | Copied and adapted from `Lib/imp.py` from the `cpython` source code, with attribution. |
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| `semmle/data/*.trap` | Y | PSF | These files were derived from the C source code of the `cpython` project, and are used in our modelling of built-in objects. No attribution, currently. |
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| `semmle/thrift/parse.py` | Y | Apache | Includes a grammar based on https://github.com/apache/thrift/blob/master/doc/specs/idl.md, with comment stating this attribution. |
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@ -1,709 +0,0 @@
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#Copied Tools.unparse.py with modifications. Copyright PSF.
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"Usage: unparse.py <path to source file>"
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import sys
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import ast
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import tokenize
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import io
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import os
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import shutil
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# Large float and imaginary literals get turned into infinities in the AST.
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# We unparse those infinities to INFSTR.
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INFSTR = "1e" + repr(sys.float_info.max_10_exp + 1)
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def interleave(inter, f, seq):
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"""Call f on each item in seq, calling inter() in between.
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"""
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seq = iter(seq)
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try:
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f(next(seq))
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except StopIteration:
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pass
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else:
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for x in seq:
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inter()
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f(x)
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class Unparser:
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"""Methods in this class recursively traverse an AST and
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output source code for the abstract syntax; original formatting
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is disregarded. """
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def __init__(self, tree, file = sys.stdout):
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"""Unparser(tree, file=sys.stdout) -> None.
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Print the source for tree to file."""
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self.f = file
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self._indent = 0
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self.dispatch(tree)
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print("", file=self.f)
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self.f.flush()
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def fill(self, text = ""):
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"Indent a piece of text, according to the current indentation level"
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self.f.write("\n"+" "*self._indent + text)
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def write(self, text):
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"Append a piece of text to the current line."
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self.f.write(text)
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def enter(self):
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"Print ':', and increase the indentation."
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self.write(":")
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self._indent += 1
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def leave(self):
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"Decrease the indentation level."
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self._indent -= 1
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def dispatch(self, tree):
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"Dispatcher function, dispatching tree type T to method _T."
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if isinstance(tree, list):
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for t in tree:
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self.dispatch(t)
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return
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meth = getattr(self, "_"+tree.__class__.__name__)
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meth(tree)
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def remove_docstring(self, t):
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if hasattr(t, "docstring"):
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return
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if not t.body:
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return
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if not isinstance(t.body[0], ast.Expr):
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return
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if not isinstance(t.body[0].value, ast.Str):
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return
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t.body = t.body[1:]
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def add_pass(self, t):
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if t.body:
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#No pass needed
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return
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t.body = [ast.Pass()]
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############### Unparsing methods ######################
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# There should be one method per concrete grammar type #
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# Constructors should be grouped by sum type. Ideally, #
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# this would follow the order in the grammar, but #
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# currently doesn't. #
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########################################################
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def _Module(self, tree):
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self.remove_docstring(tree)
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self.add_pass(tree)
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for stmt in tree.body:
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self.dispatch(stmt)
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# stmt
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def _Expr(self, tree):
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self.fill()
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self.dispatch(tree.value)
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def _Import(self, t):
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self.fill("import ")
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interleave(lambda: self.write(", "), self.dispatch, t.names)
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def _ImportFrom(self, t):
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self.fill("from ")
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self.write("." * t.level)
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if t.module:
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self.write(t.module)
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self.write(" import ")
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interleave(lambda: self.write(", "), self.dispatch, t.names)
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def _Assign(self, t):
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self.fill()
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for target in t.targets:
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self.dispatch(target)
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self.write(" = ")
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self.dispatch(t.value)
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def _AugAssign(self, t):
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self.fill()
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self.dispatch(t.target)
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self.write(" "+self.binop[t.op.__class__.__name__]+"= ")
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self.dispatch(t.value)
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def _AnnAssign(self, t):
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self.fill()
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if not t.simple and isinstance(t.target, ast.Name):
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self.write('(')
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self.dispatch(t.target)
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if not t.simple and isinstance(t.target, ast.Name):
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self.write(')')
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self.write(": ")
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self.dispatch(t.annotation)
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if t.value:
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self.write(" = ")
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self.dispatch(t.value)
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def _Return(self, t):
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self.fill("return")
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if t.value:
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self.write(" ")
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self.dispatch(t.value)
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def _Pass(self, t):
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self.fill("pass")
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def _Break(self, t):
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self.fill("break")
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def _Continue(self, t):
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self.fill("continue")
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def _Delete(self, t):
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self.fill("del ")
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interleave(lambda: self.write(", "), self.dispatch, t.targets)
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def _Assert(self, t):
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self.fill("assert ")
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self.dispatch(t.test)
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if t.msg:
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self.write(", ")
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self.dispatch(t.msg)
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def _Global(self, t):
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self.fill("global ")
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interleave(lambda: self.write(", "), self.write, t.names)
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def _Nonlocal(self, t):
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self.fill("nonlocal ")
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interleave(lambda: self.write(", "), self.write, t.names)
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def _Await(self, t):
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self.write("(")
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self.write("await")
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if t.value:
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self.write(" ")
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self.dispatch(t.value)
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self.write(")")
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def _Yield(self, t):
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self.write("(")
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self.write("yield")
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if t.value:
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self.write(" ")
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self.dispatch(t.value)
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self.write(")")
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def _YieldFrom(self, t):
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self.write("(")
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self.write("yield from")
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if t.value:
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self.write(" ")
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self.dispatch(t.value)
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self.write(")")
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def _Raise(self, t):
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self.fill("raise")
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if not t.exc:
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assert not t.cause
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return
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self.write(" ")
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self.dispatch(t.exc)
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if t.cause:
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self.write(" from ")
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self.dispatch(t.cause)
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def _Try(self, t):
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self.fill("try")
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self.enter()
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self.dispatch(t.body)
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self.leave()
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for ex in t.handlers:
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self.dispatch(ex)
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if t.orelse:
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self.fill("else")
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self.enter()
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self.dispatch(t.orelse)
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self.leave()
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if t.finalbody:
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self.fill("finally")
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self.enter()
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self.dispatch(t.finalbody)
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self.leave()
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def _ExceptHandler(self, t):
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self.fill("except")
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if t.type:
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self.write(" ")
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self.dispatch(t.type)
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if t.name:
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self.write(" as ")
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self.write(t.name)
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self.enter()
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self.dispatch(t.body)
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self.leave()
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def _ClassDef(self, t):
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self.write("\n")
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for deco in t.decorator_list:
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self.fill("@")
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self.dispatch(deco)
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self.fill("class "+t.name)
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self.write("(")
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comma = False
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for e in t.bases:
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if comma: self.write(", ")
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else: comma = True
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self.dispatch(e)
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for e in t.keywords:
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if comma: self.write(", ")
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else: comma = True
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self.dispatch(e)
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self.write(")")
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self.enter()
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self.remove_docstring(t)
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self.add_pass(t)
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self.dispatch(t.body)
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self.leave()
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def _FunctionDef(self, t):
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self.__FunctionDef_helper(t, "def")
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def _AsyncFunctionDef(self, t):
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self.__FunctionDef_helper(t, "async def")
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def __FunctionDef_helper(self, t, fill_suffix):
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self.write("\n")
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for deco in t.decorator_list:
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self.fill("@")
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self.dispatch(deco)
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def_str = fill_suffix+" "+t.name + "("
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self.fill(def_str)
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self.dispatch(t.args)
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self.write(")")
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if t.returns:
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self.write(" -> ")
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self.dispatch(t.returns)
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self.enter()
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self.remove_docstring(t)
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self.add_pass(t)
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self.dispatch(t.body)
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self.leave()
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def _For(self, t):
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self.__For_helper("for ", t)
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def _AsyncFor(self, t):
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self.__For_helper("async for ", t)
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def __For_helper(self, fill, t):
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self.fill(fill)
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self.dispatch(t.target)
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self.write(" in ")
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self.dispatch(t.iter)
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self.enter()
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self.dispatch(t.body)
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self.leave()
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if t.orelse:
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self.fill("else")
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self.enter()
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self.dispatch(t.orelse)
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self.leave()
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def _If(self, t):
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self.fill("if ")
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self.dispatch(t.test)
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self.enter()
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self.dispatch(t.body)
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self.leave()
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# collapse nested ifs into equivalent elifs.
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while (t.orelse and len(t.orelse) == 1 and
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isinstance(t.orelse[0], ast.If)):
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t = t.orelse[0]
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self.fill("elif ")
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self.dispatch(t.test)
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self.enter()
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self.dispatch(t.body)
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self.leave()
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# final else
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if t.orelse:
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self.fill("else")
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self.enter()
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self.dispatch(t.orelse)
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self.leave()
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def _While(self, t):
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self.fill("while ")
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self.dispatch(t.test)
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self.enter()
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self.dispatch(t.body)
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self.leave()
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if t.orelse:
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self.fill("else")
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self.enter()
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self.dispatch(t.orelse)
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self.leave()
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def _With(self, t):
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self.fill("with ")
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interleave(lambda: self.write(", "), self.dispatch, t.items)
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self.enter()
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self.dispatch(t.body)
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self.leave()
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def _AsyncWith(self, t):
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self.fill("async with ")
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interleave(lambda: self.write(", "), self.dispatch, t.items)
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self.enter()
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self.dispatch(t.body)
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self.leave()
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# expr
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def _Bytes(self, t):
|
||||
self.write(repr(t.s))
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|
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def _Str(self, tree):
|
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s = repr(tree.s).encode("ascii", errors="backslashreplace").decode("ascii")
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self.write(s)
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|
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def _JoinedStr(self, t):
|
||||
self.write("f")
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string = io.StringIO()
|
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self._fstring_JoinedStr(t, string.write)
|
||||
self.write(repr(string.getvalue()))
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|
||||
def _FormattedValue(self, t):
|
||||
self.write("f")
|
||||
string = io.StringIO()
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||||
self._fstring_FormattedValue(t, string.write)
|
||||
self.write(repr(string.getvalue()))
|
||||
|
||||
def _fstring_JoinedStr(self, t, write):
|
||||
for value in t.values:
|
||||
meth = getattr(self, "_fstring_" + type(value).__name__)
|
||||
meth(value, write)
|
||||
|
||||
def _fstring_Str(self, t, write):
|
||||
value = t.s.replace("{", "{{").replace("}", "}}")
|
||||
write(value)
|
||||
|
||||
def _fstring_Constant(self, t, write):
|
||||
assert isinstance(t.value, str)
|
||||
value = t.value.replace("{", "{{").replace("}", "}}")
|
||||
write(value)
|
||||
|
||||
def _fstring_FormattedValue(self, t, write):
|
||||
write("{")
|
||||
expr = io.StringIO()
|
||||
Unparser(t.value, expr)
|
||||
expr = expr.getvalue().rstrip("\n")
|
||||
if expr.startswith("{"):
|
||||
write(" ") # Separate pair of opening brackets as "{ {"
|
||||
write(expr)
|
||||
if t.conversion != -1:
|
||||
conversion = chr(t.conversion)
|
||||
assert conversion in "sra"
|
||||
write("!%s" % conversion)
|
||||
if t.format_spec:
|
||||
write(":")
|
||||
meth = getattr(self, "_fstring_" + type(t.format_spec).__name__)
|
||||
meth(t.format_spec, write)
|
||||
write("}")
|
||||
|
||||
def _Name(self, t):
|
||||
self.write(t.id)
|
||||
|
||||
def _write_constant(self, value):
|
||||
if isinstance(value, (float, complex)):
|
||||
self.write(repr(value).replace("inf", INFSTR))
|
||||
else:
|
||||
self.write(repr(value))
|
||||
|
||||
def _Constant(self, t):
|
||||
value = t.value
|
||||
if isinstance(value, tuple):
|
||||
self.write("(")
|
||||
if len(value) == 1:
|
||||
self._write_constant(value[0])
|
||||
self.write(",")
|
||||
else:
|
||||
interleave(lambda: self.write(", "), self._write_constant, value)
|
||||
self.write(")")
|
||||
else:
|
||||
self._write_constant(t.value)
|
||||
|
||||
def _NameConstant(self, t):
|
||||
self.write(repr(t.value))
|
||||
|
||||
def _Num(self, t):
|
||||
# Substitute overflowing decimal literal for AST infinities.
|
||||
self.write(repr(t.n).replace("inf", INFSTR))
|
||||
|
||||
def _List(self, t):
|
||||
self.write("[")
|
||||
interleave(lambda: self.write(", "), self.dispatch, t.elts)
|
||||
self.write("]")
|
||||
|
||||
def _ListComp(self, t):
|
||||
self.write("[")
|
||||
self.dispatch(t.elt)
|
||||
for gen in t.generators:
|
||||
self.dispatch(gen)
|
||||
self.write("]")
|
||||
|
||||
def _GeneratorExp(self, t):
|
||||
self.write("(")
|
||||
self.dispatch(t.elt)
|
||||
for gen in t.generators:
|
||||
self.dispatch(gen)
|
||||
self.write(")")
|
||||
|
||||
def _SetComp(self, t):
|
||||
self.write("{")
|
||||
self.dispatch(t.elt)
|
||||
for gen in t.generators:
|
||||
self.dispatch(gen)
|
||||
self.write("}")
|
||||
|
||||
def _DictComp(self, t):
|
||||
self.write("{")
|
||||
self.dispatch(t.key)
|
||||
self.write(": ")
|
||||
self.dispatch(t.value)
|
||||
for gen in t.generators:
|
||||
self.dispatch(gen)
|
||||
self.write("}")
|
||||
|
||||
def _comprehension(self, t):
|
||||
if hasattr(t, "is_async") and t.is_async:
|
||||
self.write(" async for ")
|
||||
else:
|
||||
self.write(" for ")
|
||||
self.dispatch(t.target)
|
||||
self.write(" in ")
|
||||
self.dispatch(t.iter)
|
||||
for if_clause in t.ifs:
|
||||
self.write(" if ")
|
||||
self.dispatch(if_clause)
|
||||
|
||||
def _IfExp(self, t):
|
||||
self.write("(")
|
||||
self.dispatch(t.body)
|
||||
self.write(" if ")
|
||||
self.dispatch(t.test)
|
||||
self.write(" else ")
|
||||
self.dispatch(t.orelse)
|
||||
self.write(")")
|
||||
|
||||
def _Set(self, t):
|
||||
assert(t.elts) # should be at least one element
|
||||
self.write("{")
|
||||
interleave(lambda: self.write(", "), self.dispatch, t.elts)
|
||||
self.write("}")
|
||||
|
||||
def _Dict(self, t):
|
||||
self.write("{")
|
||||
def write_key_value_pair(k, v):
|
||||
self.dispatch(k)
|
||||
self.write(": ")
|
||||
self.dispatch(v)
|
||||
|
||||
def write_item(item):
|
||||
k, v = item
|
||||
if k is None:
|
||||
# for dictionary unpacking operator in dicts {**{'y': 2}}
|
||||
# see PEP 448 for details
|
||||
self.write("**")
|
||||
self.dispatch(v)
|
||||
else:
|
||||
write_key_value_pair(k, v)
|
||||
interleave(lambda: self.write(", "), write_item, zip(t.keys, t.values))
|
||||
self.write("}")
|
||||
|
||||
def _Tuple(self, t):
|
||||
self.write("(")
|
||||
if len(t.elts) == 1:
|
||||
elt = t.elts[0]
|
||||
self.dispatch(elt)
|
||||
self.write(",")
|
||||
else:
|
||||
interleave(lambda: self.write(", "), self.dispatch, t.elts)
|
||||
self.write(")")
|
||||
|
||||
unop = {"Invert":"~", "Not": "not", "UAdd":"+", "USub":"-"}
|
||||
def _UnaryOp(self, t):
|
||||
self.write("(")
|
||||
self.write(self.unop[t.op.__class__.__name__])
|
||||
self.write(" ")
|
||||
self.dispatch(t.operand)
|
||||
self.write(")")
|
||||
|
||||
binop = { "Add":"+", "Sub":"-", "Mult":"*", "MatMult":"@", "Div":"/", "Mod":"%",
|
||||
"LShift":"<<", "RShift":">>", "BitOr":"|", "BitXor":"^", "BitAnd":"&",
|
||||
"FloorDiv":"//", "Pow": "**"}
|
||||
def _BinOp(self, t):
|
||||
self.write("(")
|
||||
self.dispatch(t.left)
|
||||
self.write(" " + self.binop[t.op.__class__.__name__] + " ")
|
||||
self.dispatch(t.right)
|
||||
self.write(")")
|
||||
|
||||
cmpops = {"Eq":"==", "NotEq":"!=", "Lt":"<", "LtE":"<=", "Gt":">", "GtE":">=",
|
||||
"Is":"is", "IsNot":"is not", "In":"in", "NotIn":"not in"}
|
||||
def _Compare(self, t):
|
||||
self.write("(")
|
||||
self.dispatch(t.left)
|
||||
for o, e in zip(t.ops, t.comparators):
|
||||
self.write(" " + self.cmpops[o.__class__.__name__] + " ")
|
||||
self.dispatch(e)
|
||||
self.write(")")
|
||||
|
||||
boolops = {ast.And: 'and', ast.Or: 'or'}
|
||||
def _BoolOp(self, t):
|
||||
self.write("(")
|
||||
s = " %s " % self.boolops[t.op.__class__]
|
||||
interleave(lambda: self.write(s), self.dispatch, t.values)
|
||||
self.write(")")
|
||||
|
||||
def _Attribute(self,t):
|
||||
self.dispatch(t.value)
|
||||
# Special case: 3.__abs__() is a syntax error, so if t.value
|
||||
# is an integer literal then we need to either parenthesize
|
||||
# it or add an extra space to get 3 .__abs__().
|
||||
if isinstance(t.value, ast.Num) and isinstance(t.value.n, int):
|
||||
self.write(" ")
|
||||
self.write(".")
|
||||
self.write(t.attr)
|
||||
|
||||
def _Call(self, t):
|
||||
self.dispatch(t.func)
|
||||
self.write("(")
|
||||
comma = False
|
||||
for e in t.args:
|
||||
if comma: self.write(", ")
|
||||
else: comma = True
|
||||
self.dispatch(e)
|
||||
for e in t.keywords:
|
||||
if comma: self.write(", ")
|
||||
else: comma = True
|
||||
self.dispatch(e)
|
||||
self.write(")")
|
||||
|
||||
def _Subscript(self, t):
|
||||
self.dispatch(t.value)
|
||||
self.write("[")
|
||||
self.dispatch(t.slice)
|
||||
self.write("]")
|
||||
|
||||
def _Starred(self, t):
|
||||
self.write("*")
|
||||
self.dispatch(t.value)
|
||||
|
||||
# slice
|
||||
def _Ellipsis(self, t):
|
||||
self.write("...")
|
||||
|
||||
def _Index(self, t):
|
||||
self.dispatch(t.value)
|
||||
|
||||
def _Slice(self, t):
|
||||
if t.lower:
|
||||
self.dispatch(t.lower)
|
||||
self.write(":")
|
||||
if t.upper:
|
||||
self.dispatch(t.upper)
|
||||
if t.step:
|
||||
self.write(":")
|
||||
self.dispatch(t.step)
|
||||
|
||||
def _ExtSlice(self, t):
|
||||
interleave(lambda: self.write(', '), self.dispatch, t.dims)
|
||||
|
||||
# argument
|
||||
def _arg(self, t):
|
||||
self.write(t.arg)
|
||||
if t.annotation:
|
||||
self.write(": ")
|
||||
self.dispatch(t.annotation)
|
||||
|
||||
# others
|
||||
def _arguments(self, t):
|
||||
first = True
|
||||
# normal arguments
|
||||
defaults = [None] * (len(t.args) - len(t.defaults)) + t.defaults
|
||||
for a, d in zip(t.args, defaults):
|
||||
if first:first = False
|
||||
else: self.write(", ")
|
||||
self.dispatch(a)
|
||||
if d:
|
||||
self.write("=")
|
||||
self.dispatch(d)
|
||||
|
||||
# varargs, or bare '*' if no varargs but keyword-only arguments present
|
||||
if t.vararg or t.kwonlyargs:
|
||||
if first:first = False
|
||||
else: self.write(", ")
|
||||
self.write("*")
|
||||
if t.vararg:
|
||||
self.write(t.vararg.arg)
|
||||
if t.vararg.annotation:
|
||||
self.write(": ")
|
||||
self.dispatch(t.vararg.annotation)
|
||||
|
||||
# keyword-only arguments
|
||||
if t.kwonlyargs:
|
||||
for a, d in zip(t.kwonlyargs, t.kw_defaults):
|
||||
if first:first = False
|
||||
else: self.write(", ")
|
||||
self.dispatch(a),
|
||||
if d:
|
||||
self.write("=")
|
||||
self.dispatch(d)
|
||||
|
||||
# kwargs
|
||||
if t.kwarg:
|
||||
if first:first = False
|
||||
else: self.write(", ")
|
||||
self.write("**"+t.kwarg.arg)
|
||||
if t.kwarg.annotation:
|
||||
self.write(": ")
|
||||
self.dispatch(t.kwarg.annotation)
|
||||
|
||||
def _keyword(self, t):
|
||||
if t.arg is None:
|
||||
self.write("**")
|
||||
else:
|
||||
self.write(t.arg)
|
||||
self.write("=")
|
||||
self.dispatch(t.value)
|
||||
|
||||
def _Lambda(self, t):
|
||||
self.write("(")
|
||||
self.write("lambda ")
|
||||
self.dispatch(t.args)
|
||||
self.write(": ")
|
||||
self.dispatch(t.body)
|
||||
self.write(")")
|
||||
|
||||
def _alias(self, t):
|
||||
self.write(t.name)
|
||||
if t.asname:
|
||||
self.write(" as "+t.asname)
|
||||
|
||||
def _withitem(self, t):
|
||||
self.dispatch(t.context_expr)
|
||||
if t.optional_vars:
|
||||
self.write(" as ")
|
||||
self.dispatch(t.optional_vars)
|
||||
|
||||
def roundtrip(filename, outpath):
|
||||
with open(filename, "rb") as pyfile:
|
||||
encoding = tokenize.detect_encoding(pyfile.readline)[0]
|
||||
with open(filename, "r", encoding=encoding) as pyfile:
|
||||
source = pyfile.read()
|
||||
tree = compile(source, filename, "exec", ast.PyCF_ONLY_AST)
|
||||
with open(outpath, "w", encoding=encoding) as output:
|
||||
Unparser(tree, output)
|
||||
|
||||
def strip_comments_and_docstrings(path):
|
||||
tmp = path + ".tmp"
|
||||
if path.endswith(".py"):
|
||||
roundtrip(path, tmp)
|
||||
else:
|
||||
shutil.copy(path, tmp)
|
||||
return tmp
|
||||
Загрузка…
Ссылка в новой задаче