[gnome-continuous-yocto/gnomeostree-3.28-rocko: 4205/8267] oe/data: Add export2json function

[Emmanuele Bassi <ebassi src gnome org>]

commit 4054b25d5ec2394fe0ccba349bb90b1845ab6a5d
Author: Aníbal Limón <anibal limon linux intel com>
Date:   Fri Nov 25 11:36:06 2016 -0600

    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.
    
    (From OE-Core rev: 57c7bf68ed66a56601e1431bb2db750c5742b5ce)
    
    Signed-off-by: Aníbal Limón <anibal limon linux intel com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 meta/lib/oe/data.py |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)
---
diff --git a/meta/lib/oe/data.py b/meta/lib/oe/data.py
index 4a67c45..3956733 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) 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)