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"""Command line program for EIP 1577 content hash.""" |
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# pylint: disable=W0703 |
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import argparse |
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import sys |
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from . import get_codec, decode, encode |
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10
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def handle_get_codec(args): |
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"""Handle get codec.""" |
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try: |
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chash = args.chash |
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codec = get_codec(chash) |
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except BaseException as err: # pragma: no cover |
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print(str(err), file=sys.stderr) |
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sys.exit(1) |
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print(codec) |
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def handle_decode(args): |
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"""Handle decode.""" |
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try: |
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chash = args.chash |
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value = decode(chash) |
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except BaseException as err: # pragma: no cover |
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print(str(err), file=sys.stderr) |
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sys.exit(1) |
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print(value) |
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def handle_encode(args): |
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"""Handle encode.""" |
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try: |
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codec = args.codec |
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value = args.value |
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chash = encode(codec, value) |
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except BaseException as err: # pragma: no cover |
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print(str(err), file=sys.stderr) |
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sys.exit(1) |
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print(chash) |
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53
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54
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def main(): |
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"""Handle command line program.""" |
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parser = argparse.ArgumentParser( |
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prog=__package__, |
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description='Python implementation of EIP 1577 content hash' |
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) |
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subparsers = parser.add_subparsers() |
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get_codec_parser = subparsers.add_parser( |
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name='get-codec', |
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help='extract the codec of a content hash' |
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) |
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get_codec_parser.set_defaults(which='get-codec') |
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get_codec_parser.add_argument('chash', help='an hex string containing a content hash') |
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70
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get_codec_parser = subparsers.add_parser( |
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name='decode', |
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help='decode a content hash' |
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) |
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get_codec_parser.set_defaults(which='decode') |
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get_codec_parser.add_argument('chash', help='an hex string containing a content hash') |
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get_codec_parser = subparsers.add_parser( |
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name='encode', |
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help='encode a content hash' |
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) |
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get_codec_parser.set_defaults(which='encode') |
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get_codec_parser.add_argument('codec', help='a codec of a content hash') |
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get_codec_parser.add_argument('value', help='a value of a content hash') |
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84
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85
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if len(sys.argv) == 1: # pragma: no cover |
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parser.print_help(sys.stderr) |
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sys.exit(1) |
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89
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args = parser.parse_args() |
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91
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if args.which == 'get-codec': |
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handle_get_codec(args) |
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elif args.which == 'decode': |
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handle_decode(args) |
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elif args.which == 'encode': |
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handle_encode(args) |
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99
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if __name__ == '__main__': # pragma: no cover |
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main() |
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filips123 /
ContentHashPy
