[OE-core] [wic][PATCH] wic: Set default set of bitbake variables

[Ed Bartosh]

Set default set of bitbake variables to the set of variables
for the first parsed image.

This allows wic to find proper bitbake varibale values
if it's called with '-e <image>' even without specifying
image in the call of get_bitbake_var.

Signed-off-by: Ed Bartosh <ed.bartosh at linux.intel.com>
---
 scripts/lib/wic/utils/oe/misc.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/lib/wic/utils/oe/misc.py b/scripts/lib/wic/utils/oe/misc.py
index 2f9f515..4978745 100644
--- a/scripts/lib/wic/utils/oe/misc.py
+++ b/scripts/lib/wic/utils/oe/misc.py
@@ -146,6 +146,11 @@ def get_bitbake_var(var, image=None):
             if key.replace('_', '').isalnum():
                 _BITBAKE_VARS[image][key] = val.strip('"')
 
+        # Make first image a default set of variables
+        images = [key for key in _BITBAKE_VARS if key]
+        if len(images) == 1:
+            _BITBAKE_VARS[None] = _BITBAKE_VARS[image]
+
     return _BITBAKE_VARS[image].get(var)
 
 def parse_sourceparams(sourceparams):
-- 
2.1.4