[master] Python configuration manager tool for applying updates to baseline by generating specific configurations

scripts/config-man.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+# Copyright (C) 2019 Zilliqa
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import click
+from xml.etree import ElementTree as et
+
+class XMLCombiner(object):
+    def __init__(self, filenames, new_file):
+        assert len(filenames) > 0, 'No filenames!'
+        # save all the roots, in order, to be processed later
+        self.roots = [et.parse(f).getroot() for f in filenames]
+        self.output = new_file
+
+    def combine(self):
+        for r in self.roots[1:]:
+            # combine each element with the first one, and update that
+            self.combine_element(self.roots[0], r)
+        # return the string representation
+        tree = et.ElementTree(self.roots[0])
+        tree.write(self.output, encoding="utf-8", xml_declaration=True)
+        return True
+
+    def combine_element(self, one, other):
+
+        mapping = {el.tag: el for el in one}
+        for el in other:
+            if len(el) == 0:
+                # Not nested
+                try:
+                    # Update the text
+                    mapping[el.tag].text = el.text
+                except KeyError:
+                    # An element with this name is not in the mapping
+                    mapping[el.tag] = el
+                    # Add it
+                    one.append(el)
+            else:
+                try:
+                    # Recursively process the element, and update it in the same way
+                    self.combine_element(mapping[el.tag], el)
+                except KeyError:
+                    # Not in the mapping
+                    mapping[el.tag] = el
+                    # Just add it
+                    one.append(el)
+
+
+@click.command("merge-xml")
+@click.option('--baseline', default='constants.xml', prompt='The baseline file',
+              help='The name of the master file probably constants.xml')
+@click.option('--update', default='update.xml', prompt='The file with the updates',
+              help='The name of the update file probably just the difference from the baseline file')
+@click.option('--output', default='constants_new.xml', prompt='The combined file',
+              help='The name of the output file probably constants_new.xml')
+@click.pass_context
+def setup(ctx, baseline, update, output):
+
+    if XMLCombiner((baseline, update), output).combine() :
+        print('success')
+    else:
+        print('failed')
+
+
+
+if __name__ == '__main__':
+    setup()