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# 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 pytree
from . import basefix
from .util import Comma, Name, Call, LParen, RParen, Dot
class FixExecfile(basefix.BaseFix):
PATTERN = """
power< 'execfile' trailer< '(' arglist< filename=any [',' globals=any [',' locals=any ] ] > ')' > >
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power< 'execfile' trailer< '(' filename=any ')' > >
"""
def transform(self, node, results):
assert results
syms = self.syms
filename = results["filename"]
globals = results.get("globals")
locals = results.get("locals")
args = [Name('open'), LParen(), filename.clone(), RParen(), Dot(),
Name('read'), LParen(), RParen()]
args[0].set_prefix("")
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.get_prefix())
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