wic: Add --uuid partition option

Added --uuid option to the configuration of wks parser.
This option specifies partition UUID. The code to process
it is already in place. It was implemented for --use-uuid
option.

(From OE-Core rev: c7ffe3785e61f3c57aeeebc34ec573685f0ea6a8)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/image/help.py

@@ -787,6 +787,11 @@ DESCRIPTION
                      random globally unique identifier (GUID) for the partition
                      and use it in bootloader configuration to specify root partition.
 
+         --uuid: This option is specific to wic. It specifies partition UUID.
+                 It's useful if preconfigured partition UUID is added to kernel command line
+                 in bootloader configuration before running wic. In this case .wks file can
+                 be generated or modified to set preconfigured parition UUID using this option.
+
     * bootloader
 
       This command allows the user to specify various bootloader

scripts/lib/wic/kickstart/custom_commands/partition.py

@@ -53,7 +53,7 @@ class Wic_PartData(Mic_PartData):
         self.extra_space = kwargs.get("extra-space", "10M")
         self.overhead_factor = kwargs.get("overhead-factor", 1.3)
         self._use_uuid = False
-        self.uuid = None
+        self.uuid = kwargs.get("uuid", None)
         self.use_uuid = kwargs.get("use-uuid", False)
         self.source_file = ""
         self.size = 0
@@ -71,6 +71,8 @@ class Wic_PartData(Mic_PartData):
             retval += " --no-table"
         if self.use_uuid:
             retval += " --use-uuid"
+        if self.uuid:
+            retval += " --uuid=%s" % self.uuid
         retval += " --extra-space=%s" % self.extra_space
         retval += " --overhead-factor=%f" % self.overhead_factor
 
@@ -491,5 +493,6 @@ class Wic_Partition(Mic_Partition):
                       nargs=1, default=1.3)
         op.add_option("--use-uuid", dest="use_uuid", action="store_true",
                       default=False)
+        op.add_option("--uuid")
 
         return op