machine-overrides-extender.bbclass: Automatically set extend the MACHINEOVERRIDES

This allow to grouping of different settings for similar platforms.

To use the class, specify, for example:

 MACHINEOVERRIDES_EXTENDER_soc = "group1:group2"

Change-Id: I4a7dcd353b8bedf9d8f213827d7de768783c3d5d
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 29 insertions, 0 deletions

diff --git a/classes/machine-overrides-extender.bbclass b/classes/machine-overrides-extender.bbclass
new file mode 100644
index 00000000..89ff99cf
--- /dev/null
+++ b/classes/machine-overrides-extender.bbclass
@@ -0,0 +1,29 @@
+# -*- python -*-
+# Automatically set extend the MACHINEOVERRIDES
+#
+# This allow to grouping of different settings for similar platforms.
+#
+# To use the class, specify, for example:
+#
+# MACHINEOVERRIDES_EXTENDER_soc = "group1:group2"
+#
+# Copyright 2016 (C) O.S. Systems Software LTDA.
+
+def machine_overrides_extender(d):
+    machine_overrides = (d.getVar('MACHINEOVERRIDES', True) or '').split(':')
+    for o in machine_overrides:
+        extender = d.getVar('MACHINEOVERRIDES_EXTENDER_%s' % o, True)
+        if extender:
+            extender = extender.split(':')
+            extender.reverse()
+            if not set(extender).issubset(set(machine_overrides)):
+                index = machine_overrides.index(o)
+                for e in extender:
+                    machine_overrides.insert(index, e)
+    d.setVar('MACHINEOVERRIDES', ':'.join(machine_overrides))
+
+python machine_overrides_extender_handler() {
+    machine_overrides_extender(e.data)
+}
+machine_overrides_extender_handler[eventmask] = "bb.event.ConfigParsed"
+addhandler machine_overrides_extender_handler