install() prefers provides

[cgwalters]

Fedora Atomic Host uses rpm-ostree, in the treefile right now we have:

packages: ["iptables-services", "iptables"]

Yet, this depsolves to just include iptables-services. The reason appears to be that iptables-services, added a Provides: iptables, and hence we use that to satisfy the install("iptables"). We can work around this by changing it to /usr/sbin/iptables, but this is obviously suboptimal.

I think this is a regression from #204

[jlebon]

What's confusing is that iptables-services has Provides: iptables = 1.4.16.1, while iptables has the implicit Provides: iptables = 1.6.0-2.fc25. So it seems like we're not picking the highest provides available. Judging by the code in #204, I think this is an issue that probably existed even before, though switching to provides exposed this more easily.

[cgwalters]

Workaround: https://pagure.io/fedora-atomic/pull-request/36

[jlebon]

openSUSE/libsolv#165

Though for now, a reasonable alternative is:

#224