wic: use Filesystem UUID when expand swap partition

part.get("uuid") return the Partition UUID from the partition
table instead of Filesystem UUID. This lead to swap partition
UUID not match/change when wic write expand swap partition.

change it to read the filesystem UUID using blkid. The output
from blkid should looks like this:
wic-partvzhiwq3s: LABEL="swap1" UUID="04e55c19-3f3f-4491-9e32-44eea8daa827" VERSION="1" TYPE="swap" USAGE="other"

[YOCTO #13313]

(From OE-Core rev: 683297eefebe83f848daad9927871242ab28ef91)

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/scripts/lib/wic/engine.py b/scripts/lib/wic/engine.py
index 9ff4394757..018815b966 100644
--- a/scripts/lib/wic/engine.py
+++ b/scripts/lib/wic/engine.py
@@ -280,7 +280,7 @@ class Disk:
     def __getattr__(self, name):
         """Get path to the executable in a lazy way."""
         if name in ("mdir", "mcopy", "mdel", "mdeltree", "sfdisk", "e2fsck",
-                    "resize2fs", "mkswap", "mkdosfs", "debugfs"):
+                    "resize2fs", "mkswap", "mkdosfs", "debugfs","blkid"):
             aname = "_%s" % name
             if aname not in self.__dict__:
                 setattr(self, aname, find_executable(name, self.paths))
@@ -543,7 +543,8 @@ class Disk:
                         logger.info("creating swap partition {}".format(pnum))
                         label = part.get("name")
                         label_str = "-L {}".format(label) if label else ''
-                        uuid = part.get("uuid")
+                        out = exec_cmd("{} --probe {}".format(self.blkid, self._get_part_image(pnum)))
+                        uuid = out[out.index("UUID=\"")+6:out.index("UUID=\"")+42]
                         uuid_str = "-U {}".format(uuid) if uuid else ''
                         with open(partfname, 'w') as sparse:
                             os.ftruncate(sparse.fileno(), part['size'] * self._lsector_size)