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
179
180
181
182
183
184
185
186
|
#!/usr/bin/env python3
# Converts Google's protobuf python definitions of TREZOR wire messages
# to plain-python objects as used in TREZOR Core and python-trezor
import argparse
import logging
import os
import re
import shutil
import subprocess
import sys
import glob
import tempfile
import hashlib
AUTO_HEADER = "# Automatically generated by pb2cpp\n"
# Fixing GCC7 compilation error
UNDEF_STATEMENT = """
#ifdef minor
#undef minor
#endif
"""
def which(pgm):
path = os.getenv('PATH')
for p in path.split(os.path.pathsep):
p = os.path.join(p, pgm)
if os.path.exists(p) and os.access(p, os.X_OK):
return p
PROTOC = which("protoc")
if not PROTOC:
print("protoc command not found")
sys.exit(1)
PROTOC_PREFIX = os.path.dirname(os.path.dirname(PROTOC))
PROTOC_INCLUDE = os.path.join(PROTOC_PREFIX, "include")
def namespace_file(fpath, package):
"""Adds / replaces package name. Simple regex parsing, may use https://github.com/ph4r05/plyprotobuf later"""
with open(fpath) as fh:
fdata = fh.read()
re_syntax = re.compile(r"^syntax\s*=")
re_package = re.compile(r"^package\s+([^;]+?)\s*;\s*$")
lines = fdata.split("\n")
line_syntax = None
line_package = None
for idx, line in enumerate(lines):
if line_syntax is None and re_syntax.match(line):
line_syntax = idx
if line_package is None and re_package.match(line):
line_package = idx
if package is None:
if line_package is None:
return
else:
lines.pop(line_package)
else:
new_package = "package %s;" % package
if line_package is None:
lines.insert(line_syntax + 1 if line_syntax is not None else 0, new_package)
else:
lines[line_package] = new_package
new_fdat = "\n".join(lines)
with open(fpath, "w+") as fh:
fh.write(new_fdat)
return new_fdat
def protoc(files, out_dir, additional_includes=(), package=None, force=False):
"""Compile code with protoc and return the data."""
include_dirs = set()
include_dirs.add(PROTOC_INCLUDE)
include_dirs.update(additional_includes)
with tempfile.TemporaryDirectory() as tmpdir_protob, tempfile.TemporaryDirectory() as tmpdir_out:
include_dirs.add(tmpdir_protob)
new_files = []
for file in files:
bname = os.path.basename(file)
tmp_file = os.path.join(tmpdir_protob, bname)
shutil.copy(file, tmp_file)
if package is not None:
namespace_file(tmp_file, package)
new_files.append(tmp_file)
protoc_includes = ["-I" + dir for dir in include_dirs if dir]
exec_args = (
[
PROTOC,
"--cpp_out",
tmpdir_out,
]
+ protoc_includes
+ new_files
)
subprocess.check_call(exec_args)
# Fixing gcc compilation and clashes with "minor" field name
add_undef(tmpdir_out)
# Scan output dir, check file differences
update_message_files(tmpdir_out, out_dir, force)
def update_message_files(tmpdir_out, out_dir, force=False):
files = glob.glob(os.path.join(tmpdir_out, '*.pb.*'))
for fname in files:
bname = os.path.basename(fname)
dest_file = os.path.join(out_dir, bname)
if not force and os.path.exists(dest_file):
data = open(fname, 'rb').read()
data_hash = hashlib.sha3_256(data).digest()
data_dest = open(dest_file, 'rb').read()
data_dest_hash = hashlib.sha3_256(data_dest).digest()
if data_hash == data_dest_hash:
continue
shutil.copy(fname, dest_file)
def add_undef(out_dir):
files = glob.glob(os.path.join(out_dir, '*.pb.*'))
for fname in files:
with open(fname) as fh:
lines = fh.readlines()
idx_insertion = None
for idx in range(len(lines)):
if '@@protoc_insertion_point(includes)' in lines[idx]:
idx_insertion = idx
break
if idx_insertion is None:
pass
lines.insert(idx_insertion + 1, UNDEF_STATEMENT)
with open(fname, 'w') as fh:
fh.write("".join(lines))
def strip_leader(s, prefix):
"""Remove given prefix from underscored name."""
leader = prefix + "_"
if s.startswith(leader):
return s[len(leader) :]
else:
return s
if __name__ == "__main__":
logging.basicConfig(level=logging.DEBUG)
parser = argparse.ArgumentParser()
# fmt: off
parser.add_argument("proto", nargs="+", help="Protobuf definition files")
parser.add_argument("-o", "--out-dir", help="Directory for generated source code")
parser.add_argument("-n", "--namespace", default=None, help="Message namespace")
parser.add_argument("-I", "--protoc-include", action="append", help="protoc include path")
parser.add_argument("-P", "--protobuf-module", default="protobuf", help="Name of protobuf module")
parser.add_argument("-f", "--force", default=False, help="Overwrite existing files")
# fmt: on
args = parser.parse_args()
protoc_includes = args.protoc_include or (os.environ.get("PROTOC_INCLUDE"),)
protoc(
args.proto, args.out_dir, protoc_includes, package=args.namespace, force=args.force
)
|
