[aur-general] Fixing a package with broken config symlinks

[Florian Bruhin]

Hi,

* Florian Bruhin <me at the-compiler.org> [2015-06-03 09:28:44 +0200]:
> I'd like to correct this situation in an update, but that update will
> of course overwrite /usr/share/webapps/foo with the new version (i.e.
> the new symlink) and nuke the user's current config.

Thanks to agregory's help in IRC I figured out a way which swaps the
files using pre_upgrade() in the install script:

https://github.com/The-Compiler/pkgbuild/commit/fe33593decc2879bdfa6a6996333d4338a5dd3b9

Does this look good? It seems to work fine from what I tested.

Florian

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