[Pharo-dev] DeleteVisitor and symbolic links

Sven Van Caekenberghe sven at stfx.eu
Wed Feb 13 14:15:03 EST 2019

Thanks, Alistair, for taking care of all this stuff.

> On 13 Feb 2019, at 18:54, Alistair Grant <akgrant0710 at gmail.com> wrote:
> Hi Everyone,
> I inadvertantly changed the behaviour of DeleteVisitor in Pharo 8.
> In Pharo 7 DeleteVisitor will follow all symbolic links when deleting a
> directory tree.  This has two consequences:
> - A symbolic link that points to its containing directory will result in
>  an infinite loop.
> - Files may be deleted that are NOT subdirectories of the root
>  directory.
> The Pharo 8 behaviour of not following symbolic links is how the linux
> 'rm -r' command behaves, and how I think DeleteVisitor should behave.
> As Sean commented in
> http://forum.world.st/File-problems-in-Pharo-8-tp5095111p5095176.html
> following symbolic links can lead to unexpected behaviour, deleting
> files out of the tree, and thus is quite dangerous.
> But since it is a change in existing behaviour, I wanted to let everyone
> know in case there's something I haven't thought of.
> I'll submit a PR that updates the appropriate method and class comments
> in a few days.
> Cheers,
> Alistair

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