Configuration yaml changes for virtual sensors

Change-Id: I270a62022340d6be382091a6595859dafdb634ae
Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/meta-phosphor/common/recipes-phosphor/ipmi/phosphor-ipmi-host/merge_yamls.py b/meta-phosphor/common/recipes-phosphor/ipmi/phosphor-ipmi-host/merge_yamls.py
new file mode 100755
index 000000000..5e6c4b5e6
--- /dev/null
+++ b/meta-phosphor/common/recipes-phosphor/ipmi/phosphor-ipmi-host/merge_yamls.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+"""Copied from phosphor-settings-manager
+Loads a "target" YAML file and overwrites its values with values from
+"override" YAML files.
+
+Override files are processed in the order given.
+
+Usage:
+    merge_settings.py <target yaml> [override yamls]
+"""
+import sys
+import yaml
+import copy
+
+def dict_merge(target, source):
+    """Deep merge for dicts.
+
+    Works like dict.update() that recursively updates any dict values present in
+    both parameters.
+
+    Args:
+        target (dict): Values to be overwritten by corresponding values from
+            `source`.
+        source (dict): Overriding values. Not changed by call.
+
+    Returns:
+        `target` with values overwritten from those in `source` at any and all
+        levels of nested dicts.
+    """
+    if not isinstance(source, dict):
+        return source
+    for k, v in source.iteritems():
+        if k in target and isinstance(target[k], dict):
+            dict_merge(target[k], v)
+        else:
+            target[k] = copy.deepcopy(v)
+    return target
+
+if len(sys.argv) < 2:
+    sys.exit('Argument required: target yaml')
+
+if len(sys.argv) == 2:
+    # No overrides to handle
+    sys.exit(0)
+
+target_filename = sys.argv[1]
+with open(target_filename) as target_file:
+    data = yaml.safe_load(target_file)
+    print('Loaded target YAML file ' + target_filename)
+
+for override_filename in sys.argv[2:]:
+    with open(override_filename) as override_file:
+        override = yaml.safe_load(override_file)
+        dict_merge(data, override)
+        print('Merged override YAML file ' + override_filename)
+
+with open(target_filename, 'w') as target_file:
+    yaml.dump(data, target_file, default_flow_style=False)
+    print('Wrote merged target YAML file ' + target_filename)