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move tools/pb2py to trezor-core repo
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Pavol Rusnak
parent
53aa74092e
commit
73b9ffc36a
194
tools/pb2py
194
tools/pb2py
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#!/usr/bin/env python
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# Converts Google's protobuf python definitions of TREZOR wire messages
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# to plain-python objects as used in TREZOR Core and python-trezor
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import sys
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import os
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import argparse
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from google.protobuf.internal.enum_type_wrapper import EnumTypeWrapper
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def process_type(t, cls, msg_id, indexfile, is_upy):
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print(" * type %s" % t)
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if is_upy:
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imports = ["from micropython import const", ""]
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else:
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imports = []
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imports.append("import protobuf as p")
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out = ["", "class %s(p.MessageType):" % t, ]
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if cls.DESCRIPTOR.fields_by_name:
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out.append(" FIELDS = {")
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elif msg_id is None:
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out.append(" pass")
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for v in sorted(cls.DESCRIPTOR.fields_by_name.values(), key=lambda x: x.number):
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number = v.number
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fieldname = v.name
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type = None
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repeated = v.label == 3
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required = v.label == 2
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# print v.has_default_value, v.default_value
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if v.type in (4, 13, 14):
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# TYPE_UINT64 = 4
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# TYPE_UINT32 = 13
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# TYPE_ENUM = 14
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type = 'p.UVarintType'
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elif v.type == 9:
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# TYPE_STRING = 9
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type = 'p.UnicodeType'
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elif v.type == 8:
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# TYPE_BOOL = 8
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type = 'p.BoolType'
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elif v.type == 12:
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# TYPE_BYTES = 12
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type = 'p.BytesType'
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elif v.type == 11:
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# TYPE_MESSAGE = 1
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type = v.message_type.name
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imports.append("from .%s import %s" %
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(v.message_type.name, v.message_type.name))
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else:
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raise Exception("Unknown field type %s for field %s" %
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(v.type, fieldname))
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if required:
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comment = ' # required'
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elif v.has_default_value:
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comment = ' # default=%s' % repr(v.default_value)
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else:
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comment = ''
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if repeated:
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flags = 'p.FLAG_REPEATED'
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else:
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flags = '0'
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out.append(" %d: ('%s', %s, %s),%s" %
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(number, fieldname, type, flags, comment))
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# print fieldname, number, type, repeated, comment
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# print v.__dict__
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# print v.CPPTYPE_STRING
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# print v.LABEL_REPEATED
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# print v.enum_type
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# v.has_default_value, v.default_value
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# v.label == 3 # repeated
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# print v.number
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if cls.DESCRIPTOR.fields_by_name:
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out.append(" }")
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if msg_id is not None:
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out.append(" MESSAGE_WIRE_TYPE = %d" % msg_id)
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if indexfile is not None:
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if is_upy:
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indexfile.write("%s = const(%d)\n" % (t, msg_id))
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else:
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indexfile.write("%s = %d\n" % (t, msg_id))
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return imports + out
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def process_enum(t, cls, is_upy):
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out = []
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if is_upy:
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out += ("from micropython import const", "")
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print(" * enum %s" % t)
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for k, v in cls.items():
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# Remove type name from the beginning of the constant
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# For example "PinMatrixRequestType_Current" -> "Current"
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if k.startswith("%s_" % t):
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k = k.replace("%s_" % t, '')
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# If type ends with *Type, but constant use type name without *Type, remove it too :)
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# For example "ButtonRequestType & ButtonRequest_Other" => "Other"
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if t.endswith("Type") and k.startswith("%s_" % t.replace("Type", '')):
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k = k.replace("%s_" % t.replace("Type", ''), '')
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if is_upy:
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out.append("%s = const(%s)" % (k, v))
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else:
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out.append("%s = %s" % (k, v))
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return out
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def find_msg_type(msg_types, t):
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for k, v in msg_types:
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msg_name = k.replace('MessageType_', '')
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if msg_name == t:
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return v
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def process_module(mod, genpath, indexfile, is_upy):
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print("Processing module %s" % mod.__name__)
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types = dict([(name, cls)
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for name, cls in mod.__dict__.items() if isinstance(cls, type)])
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msg_types = __import__('pb2', globals(), locals(), [
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'messages_pb2', ]).messages_pb2.MessageType.items()
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for t, cls in types.items():
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# Find message type for given class
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msg_id = find_msg_type(msg_types, t)
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out = process_type(t, cls, msg_id, indexfile, is_upy)
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write_to_file(genpath, t, out)
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enums = dict([(name, cls) for name, cls in mod.__dict__.items()
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if isinstance(cls, EnumTypeWrapper)])
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for t, cls in enums.items():
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out = process_enum(t, cls, is_upy)
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write_to_file(genpath, t, out)
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def write_to_file(genpath, t, out):
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# Write generated sourcecode to given file
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f = open(os.path.join(genpath, "%s.py" % t), 'w')
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out = ["# Automatically generated by pb2py"] + out
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data = "\n".join(out) + "\n"
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f.write(data)
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f.close()
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument('modulename', type=str, help="Name of module to generate")
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parser.add_argument('genpath', type=str, help="Directory for generated source code")
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parser.add_argument('-i', '--indexfile', type=str, help="[optional] Generate index file of wire types")
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parser.add_argument('-p', '--protopath', type=str, help="[optional] Path to search for pregenerated Google's python sources")
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parser.add_argument('-m', '--micropython', action='store_true', help="Use micropython-favoured source code")
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args = parser.parse_args()
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if args.indexfile:
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indexfile = open(args.indexfile, 'a')
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else:
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indexfile = None
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if args.protopath:
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sys.path.append(args.protopath)
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# Dynamically load module from argv[1]
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tmp = __import__('pb2', globals(), locals(), ['%s_pb2' % args.modulename])
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mod = getattr(tmp, "%s_pb2" % args.modulename)
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process_module(mod, args.genpath, indexfile, args.micropython)
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