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#!/usr/bin/env python

import argparse
import json
import os


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('repodata', action='store')
    args = parser.parse_args()

    filename = args.repodata

    if '.json' not in os.path.splitext(filename)[1]:
        print("JSON formatted file required.")
        exit(1)

    repodata = None
    with open(filename, 'r') as data:
        repodata = json.load(data)

    if repodata is None:
        print("Invalid JSON file.")
        exit(1)

    print('<html>')
    print('<head>')
    print('<title>Repository Contents</title>')
    print('</head>')
    print('<body>')
    print('<pre>')
    for key, subdict in sorted(repodata['packages'].items()):
        print("{0:50s} {1:>40s} {2:>20d}kb".format(key, subdict['md5'], subdict['size']))
    print('</pre>')
    print('</body>')
    print('</html>')