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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
# -*- mode: python; -*- PYTHON-PREPROCESSING-REQUIRED
def _GenDir(ctx):
if ctx.attr.include == None:
return ""
if not ctx.attr.include:
return ctx.label.package
if not ctx.label.package:
return ctx.attr.include
return ctx.label.package + '/' + ctx.attr.include
def _CcOuts(srcs):
return [s[:-len(".proto")] + ".pb.h" for s in srcs] + \
[s[:-len(".proto")] + ".pb.cc" for s in srcs]
def _PyOuts(srcs):
return [s[:-len(".proto")] + "_pb2.py" for s in srcs]
def _RelativeOutputPath(path, include):
if include == None:
return path
if not path.startswith(include):
fail("Include path %s isn't part of the path %s." % (include, path))
if include and include[-1] != '/':
include = include + '/'
path = path[len(include):]
if not path.startswith(PACKAGE_NAME):
fail("The package %s is not within the path %s" % (PACKAGE_NAME, path))
if not PACKAGE_NAME:
return path
return path[len(PACKAGE_NAME)+1:]
def _proto_gen_impl(ctx):
"""General implementation for generating protos"""
srcs = ctx.files.srcs
deps = []
deps += ctx.files.srcs
gen_dir = _GenDir(ctx)
import_flags = ["-I" + gen_dir]
for dep in ctx.attr.deps:
import_flags += dep.proto.import_flags
deps += dep.proto.deps
args = []
if ctx.attr.gen_cc:
args += ["--cpp_out=" + ctx.var["GENDIR"] + "/" + gen_dir]
if ctx.attr.gen_py:
args += ["--python_out=" + ctx.var["GENDIR"] + "/" + gen_dir]
if args:
ctx.action(
inputs=srcs + deps,
outputs=ctx.outputs.outs,
arguments=args + import_flags + [s.path for s in srcs],
executable=ctx.executable.protoc,
)
return struct(
proto=struct(
srcs=srcs,
import_flags=import_flags,
deps=deps,
),
)
_proto_gen = rule(
attrs = {
"srcs": attr.label_list(allow_files = True),
"deps": attr.label_list(providers = ["proto"]),
"include": attr.string(),
"protoc": attr.label(
executable = True,
single_file = True,
mandatory = True,
),
"gen_cc": attr.bool(),
"gen_py": attr.bool(),
"outs": attr.output_list(),
},
output_to_genfiles = True,
implementation = _proto_gen_impl,
)
def cc_proto_library(
name,
srcs=[],
deps=[],
cc_libs=[],
include=None,
protoc=":protoc",
internal_bootstrap_hack=False,
**kargs):
"""Bazel rule to create a C++ protobuf library from proto source files
Args:
name: the name of the cc_proto_library.
srcs: the .proto files of the cc_proto_library.
deps: a list of dependency labels; must be cc_proto_library.
cc_libs: a list of other cc_library targets depended by the generated
cc_library.
include: a string indicating the include path of the .proto files.
protoc: the label of the protocol compiler to generate the sources.
internal_bootstrap_hack: a flag indicate the cc_proto_library is used only
for bootstraping. When it is set to True, no files will be generated.
The rule will simply be a provider for .proto files, so that other
cc_proto_library can depend on it.
**kargs: other keyword arguments that are passed to cc_library.
"""
if internal_bootstrap_hack:
# For pre-checked-in generated files, we add the internal_bootstrap_hack
# which will skip the codegen action.
_proto_gen(
name=name + "_genproto",
srcs=srcs,
deps=[s + "_genproto" for s in deps],
include=include,
protoc=protoc,
)
# An empty cc_library to make rule dependency consistent.
native.cc_library(
name=name,
**kargs)
return
outs = _CcOuts(srcs)
_proto_gen(
name=name + "_genproto",
srcs=srcs,
deps=[s + "_genproto" for s in deps],
include=include,
protoc=protoc,
gen_cc=1,
outs=outs,
)
includes = []
if include != None:
includes = [include]
native.cc_library(
name=name,
srcs=outs,
deps=cc_libs + deps,
includes=includes,
**kargs)
def copied_srcs(
name,
srcs,
include,
**kargs):
outs = [_RelativeOutputPath(s, include) for s in srcs]
native.genrule(
name=name+"_genrule",
srcs=srcs,
outs=outs,
cmd=";".join(["cp $(location %s) $(location %s)" % \
(s, _RelativeOutputPath(s, include)) \
for s in srcs]))
native.filegroup(
name=name,
srcs=outs,
**kargs)
def py_proto_library(
name,
srcs=[],
deps=[],
py_libs=[],
py_extra_srcs=[],
include=None,
protoc=":protoc",
**kargs):
outs = _PyOuts(srcs)
_proto_gen(
name=name + "_genproto",
srcs=srcs,
deps=[s + "_genproto" for s in deps],
include=include,
protoc=protoc,
gen_py=1,
outs=outs,
)
copied_srcs_name=name + "_copied_srcs"
if include != None:
copied_srcs(
name=copied_srcs_name,
srcs=outs,
include=include)
srcs=[copied_srcs_name]
native.py_library(
name=name,
srcs=srcs+py_extra_srcs,
deps=py_libs,
**kargs)
def internal_protobuf_py_tests(
name,
modules=[],
**kargs):
for m in modules:
native.py_test(
name="py_%s" % m,
srcs=["google/protobuf/internal/%s.py" % m],
main="google/protobuf/internal/%s.py" % m,
**kargs)
|
