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from __future__ import absolute_import
import argparse
import json
import sys
from jsonschema._reflect import namedAny
from jsonschema.validators import validator_for
def _namedAnyWithDefault(name):
if "." not in name:
name = "jsonschema." + name
return namedAny(name)
def _json_file(path):
with open(path) as file:
return json.load(file)
parser = argparse.ArgumentParser(
description="JSON Schema Validation CLI",
)
parser.add_argument(
"-i", "--instance",
action="append",
dest="instances",
type=_json_file,
help="a path to a JSON instance to validate "
"(may be specified multiple times)",
)
parser.add_argument(
"-F", "--error-format",
default="{error.instance}: {error.message}\n",
help="the format to use for each error output message, specified in "
"a form suitable for passing to str.format, which will be called "
"with 'error' for each error",
)
parser.add_argument(
"-V", "--validator",
type=_namedAnyWithDefault,
help="the fully qualified object name of a validator to use, or, for "
"validators that are registered with jsonschema, simply the name "
"of the class.",
)
parser.add_argument(
"schema",
help="the JSON Schema to validate with",
type=_json_file,
)
def parse_args(args):
arguments = vars(parser.parse_args(args=args or ["--help"]))
if arguments["validator"] is None:
arguments["validator"] = validator_for(arguments["schema"])
return arguments
def main(args=sys.argv[1:]):
sys.exit(run(arguments=parse_args(args=args)))
def run(arguments, stdout=sys.stdout, stderr=sys.stderr):
error_format = arguments["error_format"]
validator = arguments["validator"](schema=arguments["schema"])
errored = False
for instance in arguments["instances"] or ():
for error in validator.iter_errors(instance):
stderr.write(error_format.format(error=error))
errored = True
return errored
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