borgextend/tools/minify_json.py
2019-06-05 21:47:31 -04:00

52 lines
1.8 KiB
Python
Executable File

#!/usr/bin/env python3
import argparse
import json
import os
import sys
def minify(json_in):
j = json.loads(json_in)
j = json.dumps(j, indent = None, separators = (',', ':'))
return(j)
def parseArgs():
args = argparse.ArgumentParser(description = ('Minify ("compress") JSON input'))
args.add_argument('-o', '--output',
default = '-',
help = ('Write the minified JSON out to a file. The default is "-", which instead prints it to '
'STDOUT. If instead you would like to write out to STDERR, use "+" (otherwise provide a '
'path)'))
args.add_argument('json_in',
default = '-',
nargs = '?',
help = ('The JSON input. If "-" (the default), read STDIN; otherwise provide a path to the '
'JSON file'))
return(args)
def main():
args = parseArgs().parse_args()
if args.json_in.strip() == '-':
stdin = sys.stdin.read()
if not stdin:
raise argparse.ArgumentError('You specified to read from STDIN, but STDIN is blank')
else:
args.json_in = stdin
else:
with open(os.path.abspath(os.path.expanduser(args.json_in)), 'r') as f:
args.json_in = f.read()
minified = minify(args.json_in)
if args.output.strip() not in ('-', '+'):
args.output = os.path.abspath(os.path.expanduser(args.output))
if not args.output.endswith('.json'):
args.output += '.json'
with open(args.output, 'w') as f:
f.write(minified + '\n')
elif args.output.strip() == '+':
sys.stderr.write(minified + '\n')
else:
sys.stdout.write(minified + '\n')
return()
if __name__ == '__main__':
main()