1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
#!/usr/bin/env python3
#
# Copyright (C) 2025 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#
import argparse
import os
from google.protobuf.descriptor_pb2 import FileDescriptorSet # pylint: disable=no-name-in-module
from google.protobuf.descriptor_pb2 import FieldDescriptorProto # pylint: disable=no-name-in-module
from humps import decamelize
HEADER = """\
from enum import IntEnum
from dataclasses import dataclass
from dataclasses import field
"""
def normalize(s: str) -> str:
"""Decamelize and avoid syntactic collision"""
t = decamelize(s)
return t + '_' if t in ['from'] else t
def generate_dataclass(descriptor_proto):
class_name = descriptor_proto.name
fields = []
for field_p in descriptor_proto.field:
field_name = field_p.name
field_type, field_default = get_type(field_p.type, field_p.type_name)
match field_p.label:
case FieldDescriptorProto.LABEL_REPEATED:
field_type = f'list[{field_type}] = field(default_factory=list)'
case FieldDescriptorProto.LABEL_OPTIONAL:
field_type = f'{field_type} = None'
case _:
field_type = f'{field_type} = {field_default}'
fields.append(f' {field_name}: {field_type}')
code = f"""
@dataclass
class {class_name}:
{chr(10).join(fields) if fields else ' pass'}
"""
return code
def generate_request(descriptor_proto):
class_name = descriptor_proto.name
fields = []
f_vars = []
for field_p in descriptor_proto.field:
field_name = field_p.name
field_type, field_default = get_type(field_p.type, field_p.type_name)
match field_p.label:
case FieldDescriptorProto.LABEL_REPEATED:
field_type = f'list[{field_type}] = []'
case FieldDescriptorProto.LABEL_OPTIONAL:
field_type = f'{field_type} = None'
case _:
field_type = f'{field_type} = {field_default}'
fields.append(f'{normalize(field_name)}: {field_type}')
f_vars.append(f'{normalize(field_name)}')
fields.insert(0, 'token: str = None')
code = f"""
def set_request_{decamelize(class_name)}({', '.join(fields)}):
reqi = {class_name} ({', '.join(f_vars)})
req = Request({decamelize(class_name)}=reqi)
req_env = RequestEnvelope(token, req)
return req_env
"""
return code
def generate_nested_dataclass(descriptor_proto):
out = ''
for nested_p in descriptor_proto.nested_type:
out = out + generate_dataclass(nested_p)
return out
def generate_nested_request(descriptor_proto):
out = ''
for nested_p in descriptor_proto.nested_type:
out = out + generate_request(nested_p)
return out
def generate_enum_dataclass(descriptor_proto):
code = ''
for enum_p in descriptor_proto.enum_type:
enums = []
enum_name = enum_p.name
for enum_val in enum_p.value:
enums.append(f' {enum_val.name} = {enum_val.number}')
code += f"""
class {enum_name}(IntEnum):
{chr(10).join(enums)}
"""
return code
def get_type(field_type, type_name):
res = 'Any', None
match field_type:
case FieldDescriptorProto.TYPE_STRING:
res = 'str', '""'
case FieldDescriptorProto.TYPE_INT32 | FieldDescriptorProto.TYPE_INT64:
res = 'int', 0
case FieldDescriptorProto.TYPE_FLOAT | FieldDescriptorProto.TYPE_DOUBLE:
res = 'float', 0.0
case FieldDescriptorProto.TYPE_BOOL:
res = 'bool', False
case FieldDescriptorProto.TYPE_MESSAGE | FieldDescriptorProto.TYPE_ENUM:
res = type_name.split('.')[-1], None
case _:
pass
return res
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('descriptor_file', help='protobuf .desc file')
parser.add_argument('--out-dir', help='directory to write generated file')
args = parser.parse_args()
desc_file = args.descriptor_file
out_dir = args.out_dir
with open(desc_file, 'rb') as f:
descriptor_set_data = f.read()
descriptor_set = FileDescriptorSet()
descriptor_set.ParseFromString(descriptor_set_data)
for file_proto in descriptor_set.file:
f = f'{file_proto.name.replace(".", "_")}.py'
f = os.path.join(out_dir, f)
dataclass_code = ''
nested_code = ''
enum_code = ''
request_code = ''
with open(f, 'w') as f:
enum_code += generate_enum_dataclass(file_proto)
for message_proto in file_proto.message_type:
dataclass_code += generate_dataclass(message_proto)
nested_code += generate_nested_dataclass(message_proto)
enum_code += generate_enum_dataclass(message_proto)
request_code += generate_nested_request(message_proto)
f.write(HEADER)
f.write(enum_code)
f.write(nested_code)
f.write(dataclass_code)
f.write(request_code)
|
