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#!/usr/bin/env python
import sys
import json
import argparse
from pprint import pformat
import jmespath
from jmespath import exceptions
def main():
parser = argparse.ArgumentParser()
parser.add_argument('expression')
parser.add_argument('-f', '--filename',
help=('The filename containing the input data. '
'If a filename is not given then data is '
'read from stdin.'))
parser.add_argument('--ast', action='store_true',
help=('Pretty print the AST, do not search the data.'))
args = parser.parse_args()
expression = args.expression
if args.ast:
# Only print the AST
expression = jmespath.compile(args.expression)
sys.stdout.write(pformat(expression.parsed))
sys.stdout.write('\n')
return 0
if args.filename:
with open(args.filename, 'r') as f:
data = json.load(f)
else:
data = sys.stdin.read()
data = json.loads(data)
try:
sys.stdout.write(json.dumps(
jmespath.search(expression, data), indent=4, ensure_ascii=False))
sys.stdout.write('\n')
except exceptions.ArityError as e:
sys.stderr.write("invalid-arity: %s\n" % e)
return 1
except exceptions.JMESPathTypeError as e:
sys.stderr.write("invalid-type: %s\n" % e)
return 1
except exceptions.UnknownFunctionError as e:
sys.stderr.write("unknown-function: %s\n" % e)
return 1
except exceptions.ParseError as e:
sys.stderr.write("syntax-error: %s\n" % e)
return 1
if __name__ == '__main__':
sys.exit(main())
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