Dangling repository links in certain cases

[dberzano]

Test case: ThePEG depends on pythia.

We first build pythia on a certain machine and we decide not to publish the build results (i.e. no ::rw option).

If we then build ThePEG, this time using the ::rw option, and the build ends on the same machine, aliBuild finds the local copy of the pythia build and it does not rebuild it, therefore it does not upload the package.

Instead, inside the ThePEG dist* directories, it creates dangling links to a non-existing repository version of pythia.

Example builds exhibiting the problem: pythia, ThePEG.

[ktf]

I agree this is a bug. For the moment just make sure you always build and upload the toplevel package you want to use, not an intermediate one.