| #!/usr/bin/env python |
| |
| import os |
| import sys |
| import json |
| |
| |
| class DuplicatedKeysException(Exception): |
| pass |
| |
| |
| def json_checker(pair): |
| ret = {} |
| for key, value in pair: |
| if key in ret: |
| raise DuplicatedKeysException( |
| "Duplicate key {!r} in json document".format(key)) |
| else: |
| ret[key] = value |
| return ret |
| |
| if len(sys.argv) != 2: |
| sys.stderr.write( |
| "Syntax: {} path/to/file.json\n".format(os.path.basename(__file__))) |
| sys.exit(1) |
| |
| try: |
| f = open(sys.argv[1], encoding='utf-8') |
| json.load(f, object_pairs_hook=json_checker) |
| except DuplicatedKeysException as e: |
| sys.stderr.write("Error validating %s: %s\n" % (sys.argv[1], e.args[0])) |
| sys.exit(1) |
