Add --disklabel support to clearpart (#1078537)

This adds an optional --disklabel=<disklabel> switch to clearpart,
allowing the kickstart to specify a supported disklabel as the default.
If the specified disklabel is not supported on the current platform a
KickstartValueError will be raised.

anaconda.spec.in

@@ -21,7 +21,7 @@ Source0: %{name}-%{version}.tar.bz2
 # Also update in AM_GNU_GETTEXT_VERSION in configure.ac
 %define gettextver 0.18.3
 %define intltoolver 0.31.2-3
-%define pykickstartver 1.99.55
+%define pykickstartver 1.99.56
 %define yumver 3.4.3-91
 %define dnfver 0.4.18
 %define partedver 1.8.1
@@ -91,7 +91,7 @@ The anaconda package is a metapackage for the Anaconda installer.
 %package core
 Summary: Core of the Anaconda installer
 Requires: dnf >= %{dnfver}
-Requires: python-blivet >= 0.56
+Requires: python-blivet >= 0.57
 Requires: python-meh >= %{mehver}
 Requires: libreport-anaconda >= 2.0.21-1
 Requires: libselinux-python

pyanaconda/kickstart.py

@@ -28,6 +28,7 @@
 from blivet.partitioning import growLVM
 from blivet.size import Size
 from blivet import udev
+from blivet.platform import platform
 import blivet.iscsi
 import blivet.fcoe
 import blivet.zfcp
@@ -508,13 +509,18 @@ def execute(self, *args):
         log.info("Joined realm %s", self.join_realm)
 
 
-class ClearPart(commands.clearpart.F17_ClearPart):
+class ClearPart(commands.clearpart.F21_ClearPart):
     def parse(self, args):
-        retval = commands.clearpart.F17_ClearPart.parse(self, args)
+        retval = commands.clearpart.F21_ClearPart.parse(self, args)
 
         if self.type is None:
             self.type = CLEARPART_TYPE_NONE
 
+        if self.disklabel and self.disklabel not in platform.diskLabelTypes:
+            raise KickstartValueError(formatErrorMsg(self.lineno,
+                    msg=_("Disklabel \"%s\" given in clearpart command is not "
+                          "supported on this platform.") % self.disklabel))
+
         # Do any glob expansion now, since we need to have the real list of
         # disks available before the execute methods run.
         drives = []
@@ -551,6 +557,11 @@ def execute(self, storage, ksdata, instClass):
         if self.initAll:
             storage.config.initializeDisks = self.initAll
 
+        if self.disklabel:
+            if not platform.setDefaultDiskLabelType(self.disklabel):
+                log.warn("%s is not a supported disklabel type on this platform. "
+                         "Using default disklabel %s instead.", self.disklabel, platform.defaultDiskLabelType)
+
         storage.clearPartitions()
 
 class Fcoe(commands.fcoe.F13_Fcoe):