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Deterministic file loading and vulnerability order#165

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KevinHock merged 2 commits into
python-security:masterfrom
bcaller:determinism
Aug 14, 2018
Merged

Deterministic file loading and vulnerability order#165
KevinHock merged 2 commits into
python-security:masterfrom
bcaller:determinism

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@bcaller bcaller commented Aug 14, 2018

os.walk is not deterministic (though often on the same computer it will
walk in the same order).

This means that the vulnerabilities can appear in different orders, making it hard to compare output.

Process files in alphabetical order.

I do need to look more deeply into how the import system works because I think there are some other non-determinism problems which can result in vulnerabilities not being found but I haven't figured it out yet.

os.walk is not deterministic (though often on the same computer it will
walk in the same order).

This means that the vulnerabilities appear in different orders on
different machines, making it hard to compare output.

Process files in alphabetical order.
The project_modules only need loading once if -pr is set, not once for
every file.
@KevinHock KevinHock self-requested a review August 14, 2018 18:09
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Looks great to me!

Comment thread pyt/__main__.py
directory = os.path.normpath(args.project_root)
project_modules = get_modules(directory, prepend_module_root=args.prepend_module_root)

for path in sorted(files):
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@KevinHock KevinHock Aug 14, 2018

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Such a great idea I don't think I would have ever thought of 😁

@KevinHock KevinHock merged commit c0e6ace into python-security:master Aug 14, 2018
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2 participants