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1 #!/usr/bin/env python | 1 #!/usr/bin/env python |
2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. | 2 # Copyright (c) 2016 The Chromium Authors. All rights reserved. |
petrcermak
2016/08/15 13:00:06
The date should NOT be changed. See https://chromi
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
3 # Use of this source code is governed by a BSD-style license that can be | 3 # Use of this source code is governed by a BSD-style license that can be |
4 # found in the LICENSE file. | 4 # found in the LICENSE file. |
5 | 5 |
6 """ | 6 """ |
7 A simple wrapper for protoc. | 7 A simple wrapper for protoc. |
8 | 8 Script for //third_party/protobuf/proto_library.gni . |
9 - Adds includes in generated headers. | 9 Features: |
10 - Handles building with system protobuf as an option. | 10 - Automatic include insertion. |
petrcermak
2016/08/15 13:00:06
Maybe add a hash ("#include") so that it's easier
kraynov
2016/08/15 13:37:50
Acknowledged.
| |
11 - Preventing bad proto names. | |
petrcermak
2016/08/15 13:00:06
s/Preventing/Prevents/
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
11 """ | 12 """ |
12 | 13 |
13 import fnmatch | 14 from __future__ import print_function |
14 import optparse | 15 import optparse |
15 import os.path | 16 import os.path |
16 import shutil | |
17 import subprocess | 17 import subprocess |
18 import sys | 18 import sys |
19 import tempfile | 19 import tempfile |
20 | 20 |
21 PROTOC_INCLUDE_POINT = '// @@protoc_insertion_point(includes)\n' | 21 PROTOC_INCLUDE_POINT = "// @@protoc_insertion_point(includes)" |
22 | |
23 def ModifyHeader(header_file, extra_header): | |
24 """Adds |extra_header| to |header_file|. Returns 0 on success. | |
25 | |
26 |extra_header| is the name of the header file to include. | |
27 |header_file| is a generated protobuf cpp header. | |
28 """ | |
29 include_point_found = False | |
30 header_contents = [] | |
31 with open(header_file) as f: | |
32 for line in f: | |
33 header_contents.append(line) | |
34 if line == PROTOC_INCLUDE_POINT: | |
35 extra_header_msg = '#include "%s"\n' % extra_header | |
36 header_contents.append(extra_header_msg) | |
37 include_point_found = True; | |
38 if not include_point_found: | |
39 return 1 | |
40 | |
41 with open(header_file, 'wb') as f: | |
42 f.write(''.join(header_contents)) | |
43 return 0 | |
44 | |
45 def ScanForBadFiles(scan_root): | |
46 """Scan for bad file names, see http://crbug.com/386125 for details. | |
47 Returns True if any filenames are bad. Outputs errors to stderr. | |
48 | |
49 |scan_root| is the path to the directory to be recursively scanned. | |
50 """ | |
51 badname = False | |
52 real_scan_root = os.path.realpath(scan_root) | |
53 for dirpath, dirnames, filenames in os.walk(real_scan_root): | |
54 matches = fnmatch.filter(filenames, '*-*.proto') | |
55 if len(matches) > 0: | |
56 if not badname: | |
57 badname = True | |
58 sys.stderr.write('proto files must not have hyphens in their names (' | |
59 'see http://crbug.com/386125 for more information):\n') | |
60 for filename in matches: | |
61 sys.stderr.write(' ' + os.path.join(real_scan_root, | |
62 dirpath, filename) + '\n') | |
63 return badname | |
64 | 22 |
65 | 23 |
66 def RewriteProtoFilesForSystemProtobuf(path): | 24 def ProtocGenOptions(options): |
petrcermak
2016/08/15 13:00:06
The name is a noun, so it suggests that it's a cla
petrcermak
2016/08/15 13:00:06
If I understand correctly, all methods in this fil
kraynov
2016/08/15 13:37:49
Acknowledged.
kraynov
2016/08/15 13:37:50
It's standalone utility. I've followed the previou
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67 wrapper_dir = tempfile.mkdtemp() | 25 if options is not None: |
petrcermak
2016/08/15 13:00:06
Unless '' (empty string) are valid |options|, you
petrcermak
2016/08/15 13:00:06
Don't use nested if statements unless necessary:
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
68 try: | 26 if options.endswith(":"): |
69 for filename in os.listdir(path): | 27 return options |
70 if not filename.endswith('.proto'): | 28 else: |
71 continue | 29 return options + ":" |
72 with open(os.path.join(path, filename), 'r') as src_file: | 30 else: |
73 with open(os.path.join(wrapper_dir, filename), 'w') as dst_file: | 31 return "" |
74 for line in src_file: | |
75 # Remove lines that break build with system protobuf. | |
76 # We cannot optimize for lite runtime, because system lite runtime | |
77 # does not have a Chromium-specific hack to retain unknown fields. | |
78 # Similarly, it does not understand corresponding option to control | |
79 # the usage of that hack. | |
80 if 'LITE_RUNTIME' in line or 'retain_unknown_fields' in line: | |
81 continue | |
82 dst_file.write(line) | |
83 | 32 |
84 return wrapper_dir | 33 |
85 except: | 34 def StripProtos(protos): |
petrcermak
2016/08/15 13:00:06
(Feel free to ignore) I would personally use a com
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
86 shutil.rmtree(wrapper_dir) | 35 stripped = [] |
87 raise | 36 for filename in protos: |
37 if not filename.endswith(".proto"): | |
38 raise RuntimeError("Invalid proto filename extension: " + filename) | |
39 if "-" in filename: | |
40 raise RuntimeError("Proto files must not have hyphens in their names " | |
petrcermak
2016/08/15 13:00:06
suggestion "Proto file names must not contain hyph
kraynov
2016/08/15 13:37:50
Acknowledged.
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41 "(see http://crbug.com/386125 for more information).") | |
petrcermak
2016/08/15 13:00:06
supernit: Your error ends with a period here, but
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
42 # Remove .proto extension. | |
43 stripped.append(filename.rsplit(".", 1)[0]) | |
44 return stripped | |
45 | |
46 | |
47 def WriteIncludes(headers, include): | |
48 for filename in headers: | |
49 include_point_found = False | |
50 contents = [] | |
51 with open(filename) as f: | |
52 for line in f: | |
53 stripped_line = line.strip() | |
54 contents.append(stripped_line) | |
55 if stripped_line == PROTOC_INCLUDE_POINT: | |
petrcermak
2016/08/15 13:00:06
you should add an if statement asserting that incl
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
56 extra_statement = '#include "{0}"'.format(include) | |
57 contents.append(extra_statement) | |
58 include_point_found = True | |
59 | |
60 if not include_point_found: | |
61 raise RuntimeError("Include point not found in header: " + filename) | |
62 | |
63 with open(filename, "w") as f: | |
64 for line in contents: | |
petrcermak
2016/08/15 13:00:06
f.writelines(contents)
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
65 print(line, file=f) | |
88 | 66 |
89 | 67 |
90 def main(argv): | 68 def main(argv): |
91 parser = optparse.OptionParser() | 69 parser = optparse.OptionParser() |
petrcermak
2016/08/15 13:00:06
Could you use the argparse module instead? Optpars
kraynov
2016/08/15 13:37:50
Okay.
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92 parser.add_option('--include', dest='extra_header', | 70 parser.add_option("--protoc", |
93 help='The extra header to include. This must be specified ' | 71 help="Relative path to compiler.") |
94 'along with --protobuf.') | |
95 parser.add_option('--protobuf', dest='generated_header', | |
96 help='The c++ protobuf header to add the extra header to. ' | |
97 'This must be specified along with --include.') | |
98 parser.add_option('--proto-in-dir', | |
99 help='The directory containing .proto files.') | |
100 parser.add_option('--proto-in-file', help='Input file to compile.') | |
101 parser.add_option('--use-system-protobuf', type=int, default=0, | |
102 help='Option to use system-installed protobuf ' | |
103 'instead of bundled one.') | |
104 (options, args) = parser.parse_args(sys.argv) | |
105 if len(args) < 2: | |
106 return 1 | |
107 | 72 |
108 if ScanForBadFiles(options.proto_in_dir): | 73 parser.add_option("--proto-in-dir", |
109 return 1 | 74 help="Base directory with source protos.") |
75 parser.add_option("--cc-out-dir", | |
76 help="Output directory for standard C++ generator.") | |
77 parser.add_option("--py-out-dir", | |
78 help="Output directory for standard Python generator.") | |
79 parser.add_option("--plugin-out-dir", | |
80 help="Output directory for custom generator.") | |
petrcermak
2016/08/15 13:00:06
I think that the help string should contain the wo
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
110 | 81 |
111 proto_path = options.proto_in_dir | 82 parser.add_option("--plugin", |
112 if options.use_system_protobuf == 1: | 83 help="Relative path to custom generator plugin.") |
113 proto_path = RewriteProtoFilesForSystemProtobuf(proto_path) | 84 parser.add_option("--plugin-options", |
114 try: | 85 help="Custom generator options.") |
petrcermak
2016/08/15 13:00:07
I think that the help string should contain the wo
kraynov
2016/08/15 13:37:50
Acknowledged.
| |
115 # Run what is hopefully protoc. | 86 parser.add_option("--cc-options", |
116 protoc_args = args[1:] | 87 help="Standard C++ generator options.") |
117 protoc_args += ['--proto_path=%s' % proto_path, | 88 parser.add_option("--include", |
118 os.path.join(proto_path, options.proto_in_file)] | 89 help="Name of include to put into generated headers.") |
petrcermak
2016/08/15 13:00:06
supernit: s/put/insert/
kraynov
2016/08/15 13:37:50
Acknowledged.
| |
119 ret = subprocess.call(protoc_args) | 90 (options, args) = parser.parse_args(argv) |
petrcermak
2016/08/15 13:00:06
no need for parentheses (feel free to ignore)
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
120 if ret != 0: | |
121 return ret | |
122 finally: | |
123 if options.use_system_protobuf == 1: | |
124 # Remove temporary directory holding re-written files. | |
125 shutil.rmtree(proto_path) | |
126 | 91 |
127 # protoc succeeded, check to see if the generated cpp header needs editing. | 92 protoc = os.path.realpath(options.protoc) |
petrcermak
2016/08/15 13:00:06
In my opinion, there's no need to define this here
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
128 if not options.extra_header or not options.generated_header: | 93 proto_dir = os.path.relpath(options.proto_in_dir) |
129 return 0 | 94 protoc_args = ["--proto_path", proto_dir] |
petrcermak
2016/08/15 13:00:06
To avoid pre-pending the protoc binary at the end
kraynov
2016/08/15 13:37:50
Acknowledged.
| |
130 return ModifyHeader(options.generated_header, options.extra_header) | 95 |
96 protos = args[1:] | |
97 stripped_protos = StripProtos(protos) | |
98 headers = [] | |
99 | |
100 if options.cc_out_dir is not None: | |
petrcermak
2016/08/15 13:00:06
you could do the following:
if options.cc_out_dir
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
101 cc_options = ProtocGenOptions(options.cc_options) | |
102 protoc_args += ["--cpp_out", cc_options + options.cc_out_dir] | |
103 for name in stripped_protos: | |
104 headers.append(os.path.join(options.cc_out_dir, name + ".pb.h")) | |
105 | |
106 if options.py_out_dir is not None: | |
107 protoc_args += ["--python_out", options.py_out_dir] | |
108 | |
109 if options.plugin_out_dir is not None: | |
110 plugin_options = ProtocGenOptions(options.plugin_options) | |
111 protoc_args += [ | |
112 "--plugin", "protoc-gen-plugin=" + os.path.relpath(options.plugin), | |
113 "--plugin_out", plugin_options + options.plugin_out_dir, | |
114 ] | |
115 | |
116 for name in protos: | |
117 protoc_args.append(os.path.join(proto_dir, name)) | |
petrcermak
2016/08/15 13:00:06
I personally prefer comprehensions over explicit l
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
118 | |
119 ret = subprocess.call([protoc] + protoc_args) | |
120 if ret != 0: | |
121 raise RuntimeError("Protoc has returned non-zero status: " + str(ret)) | |
122 | |
123 if options.include is not None: | |
petrcermak
2016/08/15 13:00:06
I think you can drop "is not None" here
kraynov
2016/08/15 13:37:49
Acknowledged.
| |
124 WriteIncludes(headers, options.include) | |
131 | 125 |
132 | 126 |
133 if __name__ == '__main__': | 127 if __name__ == '__main__': |
petrcermak
2016/08/15 13:00:06
Before this patch, this file used single quotes ev
kraynov
2016/08/15 13:37:50
Acknowledged.
| |
134 sys.exit(main(sys.argv)) | 128 try: |
129 main(sys.argv) | |
130 except RuntimeError as e: | |
131 print(e, file=sys.stderr) | |
132 sys.exit(1) | |
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