wic: add default_image attribute to BitbakeVars

New attribute is used when bitbake variable is requested without
specifying image name. The attribute should be set from outside,
for example when wic is called with '-e <image>' option.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/scripts/lib/wic/utils/oe/misc.py b/scripts/lib/wic/utils/oe/misc.py
index 41e435fc27..040176d486 100644
--- a/scripts/lib/wic/utils/oe/misc.py
+++ b/scripts/lib/wic/utils/oe/misc.py
@@ -131,6 +131,9 @@ class BitbakeVars(defaultdict):
     def __init__(self):
         defaultdict.__init__(self, dict)
 
+        # default_image attribute should be set from outside
+        self.default_image = None
+
     def _parse_line(self, line, image):
         """
         Parse one line from bitbake -e output.
@@ -152,6 +155,9 @@ class BitbakeVars(defaultdict):
         Get bitbake variable value lazy way, i.e. run
         'bitbake -e' only when variable is requested.
         """
+        if not image:
+            image = self.default_image
+
         if image not in self:
             # Get bitbake -e output
             cmd = "bitbake -e"