Add support for "repo --gpgkey" kickstart option

This adds ability to verify gpg signatures on downloaded packages, which is
especially important when installing from network repository (instead of local
DVD/disk).

This change depends on pykickstart support here:
pykickstart/pykickstart#32

pyanaconda/kickstart.py

@@ -1575,7 +1575,7 @@ def execute(self, storage, ksdata, instClass):
                                      parents=request)
             storage.createDevice(luksdev)
 
-class RepoData(commands.repo.F21_RepoData):
+class RepoData(commands.repo.F23_RepoData):
     def __init__(self, *args, **kwargs):
         """ Add enabled kwarg
 
@@ -1585,7 +1585,7 @@ def __init__(self, *args, **kwargs):
         self.enabled = kwargs.pop("enabled", True)
         self.repo_id = kwargs.pop("repo_id", None)
 
-        commands.repo.F21_RepoData.__init__(self, *args, **kwargs)
+        commands.repo.F23_RepoData.__init__(self, *args, **kwargs)
 
 class ReqPart(commands.reqpart.F23_ReqPart):
     def execute(self, storage, ksdata, instClass):

pyanaconda/packaging/dnfpayload.py

@@ -269,6 +269,10 @@ def _add_repo(self, ksrepo):
         if ksrepo.excludepkgs:
             repo.exclude = ksrepo.excludepkgs
 
+        if ksrepo.gpgkey:
+            repo.gpgkey = ksrepo.gpgkey
+            repo.gpgcheck = True
+
         # If this repo is already known, it's one of two things:
         # (1) The user is trying to do "repo --name=updates" in a kickstart file
         #     and we should just know to enable the already existing on-disk