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#!/usr/bin/env python3
import json
import os
import sys
#chef_update_string = '{"default_attributes": {"asdc-connections": {"asdc-controller1": {"environmentName": "test"}}}}'
#json_file_to_update="./volumes/mso/chef-config/mso-docker.json"
def usage():
print('Usage:')
print(" echo <json> | %s <file> " % ( sys.argv[0], ))
print()
print("file\tpath of the valid json file to update")
print("json\ta json string containing the values to update in <file>")
print("")
print("Example : ")
print("""
echo '{"default_attributes": {"asdc-connections": {"asdc-controller1": {"environmentName": "test"}}}}' | %s ./volumes/mso/chef-config/mso-docker.json
""" % (sys.argv[0]))
if len(sys.argv) < 2:
usage()
exit(1)
if sys.argv[1] in ('--help','-h'):
usage()
exit(0)
# get updates
updates_json = sys.stdin.read()
print(updates_json[81:])
updates = json.loads(updates_json)
# get file to update
json_file_to_update = sys.argv[1]
with open(json_file_to_update) as f:
to_update = json.load(f)
# update config with updates
def update(config, updates):
#assert isinstance(config, dict)
#assert isinstance(updates, dict)
# if key is a simple type, update it. Otherwise, update sub values
for update_key,update_value in updates.items():
if update_key not in config:
raise Exception('Incorrect parameter : %s' % (update_key,))
if isinstance(update_value, (int, str)):
config[update_key] = update_value
elif isinstance (update_value,list) and isinstance (config[update_key],list):
config[update_key] = update_value
else:
update(config[update_key], update_value)
update(to_update, updates)
# replace the file
tmp_file = '%s.tmp' % (json_file_to_update,)
with open(tmp_file, 'w') as f:
json.dump(to_update, f, sort_keys=True, indent=2)
os.rename(tmp_file, json_file_to_update)
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