wic: remove partition images

Preserving images for every partition doubles disk space
consumed by an image build. As those images are not used,
so it's better to remove them after assembling final image.

(From OE-Core rev: 51171b4aa10f2218c5e27d785ca7bf4f3949a4b4)

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

scripts/lib/wic/utils/partitionedfs.py

@@ -43,6 +43,7 @@ class Image():
     def __init__(self, native_sysroot=None):
         self.disks = {}
         self.partitions = []
+        self.partimages = []
         # Size of a sector used in calculations
         self.sector_size = SECTOR_SIZE
         self._partitions_layed_out = False
@@ -336,6 +337,10 @@ class Image():
                     disk['disk'].cleanup()
                 except:
                     pass
+        # remove partition images
+        for image in self.partimages:
+            if os.path.isfile(image):
+                os.remove(image)
 
     def assemble(self, image_file):
         msger.debug("Installing partitions")
@@ -351,7 +356,9 @@ class Image():
                             (source, part['num'], part['start'],
                              part['start'] + part['size'] - 1, part['size']))
 
-                os.rename(source, image_file + '.p%d' % part['num'])
+                partimage = image_file + '.p%d' % part['num']
+                os.rename(source, partimage)
+                self.partimages.append(partimage)
 
     def create(self):
         for dev in self.disks: