54 lines
2.0 KiB
Python
54 lines
2.0 KiB
Python
|
# Copyright 2006 Google, Inc. All Rights Reserved.
|
||
|
|
# Licensed to PSF under a Contributor Agreement.
|
||
|
|
|
||
|
|
"""Fixer for execfile.
|
||
|
|
|
||
|
|
This converts usages of the execfile function into calls to the built-in
|
||
|
|
exec() function.
|
||
|
|
"""
|
||
|
|
|
||
|
|
from .. import fixer_base
|
||
|
|
from ..fixer_util import (Comma, Name, Call, LParen, RParen, Dot, Node,
|
||
|
|
ArgList, String, syms)
|
||
|
|
|
||
|
|
|
||
|
|
class FixExecfile(fixer_base.BaseFix):
|
||
|
|
BM_compatible = True
|
||
|
|
|
||
|
|
PATTERN = """
|
||
|
|
power< 'execfile' trailer< '(' arglist< filename=any [',' globals=any [',' locals=any ] ] > ')' > >
|
||
|
|
|
|
||
|
|
power< 'execfile' trailer< '(' filename=any ')' > >
|
||
|
|
"""
|
||
|
|
|
||
|
|
def transform(self, node, results):
|
||
|
|
assert results
|
||
|
|
filename = results["filename"]
|
||
|
|
globals = results.get("globals")
|
||
|
|
locals = results.get("locals")
|
||
|
|
|
||
|
|
# Copy over the prefix from the right parentheses end of the execfile
|
||
|
|
# call.
|
||
|
|
execfile_paren = node.children[-1].children[-1].clone()
|
||
|
|
# Construct open().read().
|
||
|
|
open_args = ArgList([filename.clone(), Comma(), String('"rb"', ' ')],
|
||
|
|
rparen=execfile_paren)
|
||
|
|
open_call = Node(syms.power, [Name("open"), open_args])
|
||
|
|
read = [Node(syms.trailer, [Dot(), Name('read')]),
|
||
|
|
Node(syms.trailer, [LParen(), RParen()])]
|
||
|
|
open_expr = [open_call] + read
|
||
|
|
# Wrap the open call in a compile call. This is so the filename will be
|
||
|
|
# preserved in the execed code.
|
||
|
|
filename_arg = filename.clone()
|
||
|
|
filename_arg.prefix = " "
|
||
|
|
exec_str = String("'exec'", " ")
|
||
|
|
compile_args = open_expr + [Comma(), filename_arg, Comma(), exec_str]
|
||
|
|
compile_call = Call(Name("compile"), compile_args, "")
|
||
|
|
# Finally, replace the execfile call with an exec call.
|
||
|
|
args = [compile_call]
|
||
|
|
if globals is not None:
|
||
|
|
args.extend([Comma(), globals.clone()])
|
||
|
|
if locals is not None:
|
||
|
|
args.extend([Comma(), locals.clone()])
|
||
|
|
return Call(Name("exec"), args, prefix=node.prefix)
|