I have just seen one ebuild that was setting exactly the same dev-libs/libpcre in the same DEPEND=() chunk. Maybe repoman could warn when this mistake is done Thanks a lot!
Why? That should not cause any problem in dependency resolution.
Well, for having more tidy ebuilds... a bit like the warning about trailing spaces in ebuilds
If we do something like this, we need to ensure the check occurs before USE conditionals are removed (otherwise dep needed by two or more USE flags separately would trigger this). However, I think this would work as well if we encourage developers to sort dependencies.
repoman support has been removed per bug 835013. Please file a new bug (or, I suppose, reopen this one) if you feel this check is still applicable to pkgcheck and doesn't already exist.