| 1 | n/a | # Copyright 2006 Google, Inc. All Rights Reserved. |
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| 2 | n/a | # Licensed to PSF under a Contributor Agreement. |
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| 3 | n/a | |
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| 4 | n/a | """Fixer for execfile. |
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| 5 | n/a | |
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| 6 | n/a | This converts usages of the execfile function into calls to the built-in |
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| 7 | n/a | exec() function. |
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| 8 | n/a | """ |
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| 9 | n/a | |
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| 10 | n/a | from .. import fixer_base |
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| 11 | n/a | from ..fixer_util import (Comma, Name, Call, LParen, RParen, Dot, Node, |
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| 12 | n/a | ArgList, String, syms) |
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| 13 | n/a | |
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| 14 | n/a | |
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| 15 | n/a | class FixExecfile(fixer_base.BaseFix): |
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| 16 | n/a | BM_compatible = True |
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| 17 | n/a | |
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| 18 | n/a | PATTERN = """ |
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| 19 | n/a | power< 'execfile' trailer< '(' arglist< filename=any [',' globals=any [',' locals=any ] ] > ')' > > |
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| 20 | n/a | | |
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| 21 | n/a | power< 'execfile' trailer< '(' filename=any ')' > > |
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| 22 | n/a | """ |
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| 23 | n/a | |
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| 24 | n/a | def transform(self, node, results): |
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| 25 | n/a | assert results |
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| 26 | n/a | filename = results["filename"] |
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| 27 | n/a | globals = results.get("globals") |
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| 28 | n/a | locals = results.get("locals") |
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| 29 | n/a | |
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| 30 | n/a | # Copy over the prefix from the right parentheses end of the execfile |
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| 31 | n/a | # call. |
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| 32 | n/a | execfile_paren = node.children[-1].children[-1].clone() |
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| 33 | n/a | # Construct open().read(). |
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| 34 | n/a | open_args = ArgList([filename.clone()], rparen=execfile_paren) |
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| 35 | n/a | open_call = Node(syms.power, [Name("open"), open_args]) |
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| 36 | n/a | read = [Node(syms.trailer, [Dot(), Name('read')]), |
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| 37 | n/a | Node(syms.trailer, [LParen(), RParen()])] |
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| 38 | n/a | open_expr = [open_call] + read |
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| 39 | n/a | # Wrap the open call in a compile call. This is so the filename will be |
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| 40 | n/a | # preserved in the execed code. |
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| 41 | n/a | filename_arg = filename.clone() |
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| 42 | n/a | filename_arg.prefix = " " |
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| 43 | n/a | exec_str = String("'exec'", " ") |
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| 44 | n/a | compile_args = open_expr + [Comma(), filename_arg, Comma(), exec_str] |
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| 45 | n/a | compile_call = Call(Name("compile"), compile_args, "") |
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| 46 | n/a | # Finally, replace the execfile call with an exec call. |
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| 47 | n/a | args = [compile_call] |
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| 48 | n/a | if globals is not None: |
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| 49 | n/a | args.extend([Comma(), globals.clone()]) |
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| 50 | n/a | if locals is not None: |
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| 51 | n/a | args.extend([Comma(), locals.clone()]) |
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| 52 | n/a | return Call(Name("exec"), args, prefix=node.prefix) |
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