oe/data: Add export2json function

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@linux.intel.com>

diff --git a/meta/lib/oe/data.py b/meta/lib/oe/data.py
index 4a67c457b31c102c4015d23d90e714bf2e105391..39567333f130d341f443f2c5100fca9ea3afac4e 100644 (file)
--- 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) 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)