[OE-core] [PATCH 13/32] oe/data: Add export2json function

[Aníbal Limón]

The export2json function export the variables contained in
the data store to JSON format, the main usage for now will be
to provide test data to QA framework.

Signed-off-by: Aníbal Limón <anibal.limon at linux.intel.com>
---
 meta/lib/oe/data.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/meta/lib/oe/data.py b/meta/lib/oe/data.py
index ee48950..db3bd6d 100644
--- a/meta/lib/oe/data.py
+++ b/meta/lib/oe/data.py
@@ -1,3 +1,4 @@
+import json
 import oe.maketype
 
 def typed_value(key, d):
@@ -15,3 +16,30 @@ def typed_value(key, d):
         return oe.maketype.create(d.getVar(key, True) or '', var_type, **flags)
     except (TypeError, ValueError) as exc:
         bb.msg.fatal("Data", "%s: %s" % (key, str(exc)))
+
+def export2json(d, json_file, expand=True):
+    data2export = {}
+    keys2export = []
+
+    for key in d.keys():
+        if key.startswith("_"):
+            continue
+        elif key.startswith("BB"):
+            continue
+        elif key.startswith("B_pn"):
+            continue
+        elif key.startswith("do_"):
+            continue
+        elif d.getVarFlag(key, "func", True):
+            continue
+
+        keys2export.append(key)
+
+    for key in keys2export:
+        try:
+            data2export[key] = d.getVar(key, expand)
+        except bb.data_smart.ExpansionError:
+            data2export[key] = ''
+
+    with open(json_file, "w") as f:
+        json.dump(data2export, f, skipkeys=True, indent=4, sort_keys=True)
-- 
2.1.4