added yamerge

yamerge.py

@@ -0,0 +1,43 @@
+#!/bin/env python3
+
+import argparse
+from sys import stdout
+from yaml import load, dump
+try:
+    from yaml import CLoader as Loader, CDumper as Dumper
+except ImportError:
+    from yaml import Loader, Dumper
+
+def deepmerge(source, destination):
+    for key, value in source.items():
+        if isinstance(value, dict):
+            merge(value, destination.setdefault(key, {}))
+        else:
+            destination[key] = value
+    return destination
+
+def deepsort(dictionary):
+    result = {}
+    for k, v in sorted(dictionary.items()):
+        if isinstance(v, dict):
+            result[k] = deepsort(v)
+        else:
+            result[k] = v
+    return result
+
+parser = argparse.ArgumentParser(
+  prog='yamerge',
+  description='Merges all YAML files listed on the CLI and outputs the resulting YAML to stdout.')
+parser.add_argument('files', metavar='filename', type=str, nargs='+')
+args = parser.parse_args()
+
+y = {}
+for file in args.files:
+  f = open(file)
+  data = load(f, Loader=Loader)
+  f.close()
+  merged = deepmerge(y, data)
+  y = merged
+
+y = deepsort(y)
+print(dump(y, Dumper=Dumper))