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#!/usr/bin/env python
# -*- encoding: utf-8 -*-
"""
Validate a JSON file against its JSON schema.
SEE ALSO:
* https://python-jsonschema.readthedocs.org/
* https://python-jsonschema.readthedocs.org/en/latest/errors.html
REQUIRES:
Python >= 2.6
jsonschema >= 1.3.0
argparse
"""
from __future__ import absolute_import, print_function
__author__ = "Jens Engel"
__version__ = "0.1.0"
from jsonschema import validate
import argparse
import os.path
import sys
import textwrap
try:
import json
except ImportError:
try:
import simplejson as json
except ImportError:
sys.exit("REQUIRE: simplejson (which is not installed)")
# -----------------------------------------------------------------------------
# CONSTANTS:
# -----------------------------------------------------------------------------
HERE = os.path.dirname(__file__)
TOP = os.path.normpath(os.path.join(HERE, ".."))
SCHEMA = os.path.join(TOP, "etc", "json", "behave.json-schema")
# -----------------------------------------------------------------------------
# FUNCTIONS:
# -----------------------------------------------------------------------------
def jsonschema_validate(filename, schema, encoding=None):
f = open(filename, "r")
contents = f.read()
f.close()
data = json.loads(contents, encoding=encoding)
return validate(data, schema)
def main(args=None):
"""
Validate JSON files against their JSON schema.
NOTE: Behave's JSON-schema is used per default.
SEE ALSO:
* http://json-schema.org/
* http://tools.ietf.org/html/draft-zyp-json-schema-04
"""
if args is None:
args = sys.argv[1:]
default_schema = None
if os.path.exists(SCHEMA):
default_schema = SCHEMA
parser = argparse.ArgumentParser(
description=textwrap.dedent(main.__doc__),
formatter_class=argparse.RawDescriptionHelpFormatter
)
parser.add_argument("-v", "--version",
action="version", version=__version__)
parser.add_argument("-s", "--schema",
help="JSON schema to use.")
parser.add_argument("-e", "--encoding",
help="Encoding for JSON/JSON schema.")
parser.add_argument("files", nargs="+", metavar="JSON_FILE",
help="JSON file to check.")
parser.set_defaults(
schema=default_schema,
encoding="UTF-8"
)
options = parser.parse_args(args)
if not options.schema:
parser.error("REQUIRE: JSON schema")
elif not os.path.isfile(options.schema):
parser.error("SCHEMA not found: %s" % options.schema)
try:
f = open(options.schema, "r")
contents = f.read()
f.close()
schema = json.loads(contents, encoding=options.encoding)
except Exception as e:
msg = "ERROR: %s: %s (while loading schema)" % (e.__class__.__name__, e)
sys.exit(msg)
error_count = 0
for filename in options.files:
validated = True
more_info = None
try:
print("validate:", filename, "...", end=' ')
jsonschema_validate(filename, schema, encoding=options.encoding)
except Exception as e:
more_info = "%s: %s" % (e.__class__.__name__, e)
validated = False
error_count += 1
if validated:
print("OK")
else:
print("FAILED\n\n%s" % more_info)
return error_count
# -----------------------------------------------------------------------------
# AUTO-MAIN
# -----------------------------------------------------------------------------
if __name__ == "__main__":
sys.exit(main())
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