38f131fd8c
This is necessary to run protoc on the host as a dependency for Android BUILD targets with Bazel.
289 lines
8.0 KiB
Python
289 lines
8.0 KiB
Python
# -*- mode: python; -*- PYTHON-PREPROCESSING-REQUIRED
|
|
|
|
def _GenDir(ctx):
|
|
if not ctx.attr.includes:
|
|
return ""
|
|
if not ctx.attr.includes[0]:
|
|
return ctx.label.package
|
|
if not ctx.label.package:
|
|
return ctx.attr.includes[0]
|
|
return ctx.label.package + '/' + ctx.attr.includes[0]
|
|
|
|
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)
|
|
if gen_dir:
|
|
import_flags = ["-I" + gen_dir]
|
|
else:
|
|
import_flags = ["-I."]
|
|
|
|
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"]),
|
|
"includes": attr.string_list(),
|
|
"protoc": attr.label(
|
|
cfg = HOST_CFG,
|
|
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="//google/protobuf:protoc",
|
|
internal_bootstrap_hack=False,
|
|
default_runtime="//google/protobuf:protobuf",
|
|
**kargs):
|
|
"""Bazel rule to create a C++ protobuf library from proto source files
|
|
|
|
NOTE: the rule is only an internal workaround to generate protos. The
|
|
interface may change and the rule may be removed when bazel has introduced
|
|
the native rule.
|
|
|
|
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.
|
|
default_runtime: the implicitly default runtime which will be depended on by
|
|
the generated cc_library target.
|
|
**kargs: other keyword arguments that are passed to cc_library.
|
|
|
|
"""
|
|
|
|
includes = []
|
|
if include != None:
|
|
includes = [include]
|
|
|
|
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],
|
|
includes=includes,
|
|
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],
|
|
includes=includes,
|
|
protoc=protoc,
|
|
gen_cc=1,
|
|
outs=outs,
|
|
)
|
|
|
|
if default_runtime and not default_runtime in cc_libs:
|
|
cc_libs += [default_runtime]
|
|
|
|
native.cc_library(
|
|
name=name,
|
|
srcs=outs,
|
|
deps=cc_libs + deps,
|
|
includes=includes,
|
|
**kargs)
|
|
|
|
|
|
def internal_copied_filegroup(
|
|
name,
|
|
srcs,
|
|
include,
|
|
**kargs):
|
|
"""Bazel rule to fix sources file to workaround with python path issues.
|
|
|
|
Args:
|
|
name: the name of the internal_copied_filegroup rule, which will be the
|
|
name of the generated filegroup.
|
|
srcs: the source files to be copied.
|
|
include: the expected import root of the source.
|
|
**kargs: extra arguments that will be passed into the filegroup.
|
|
"""
|
|
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,
|
|
default_runtime="//google/protobuf:protobuf_python",
|
|
protoc="//google/protobuf:protoc",
|
|
**kargs):
|
|
"""Bazel rule to create a Python protobuf library from proto source files
|
|
|
|
NOTE: the rule is only an internal workaround to generate protos. The
|
|
interface may change and the rule may be removed when bazel has introduced
|
|
the native rule.
|
|
|
|
Args:
|
|
name: the name of the py_proto_library.
|
|
srcs: the .proto files of the py_proto_library.
|
|
deps: a list of dependency labels; must be py_proto_library.
|
|
py_libs: a list of other py_library targets depended by the generated
|
|
py_library.
|
|
py_extra_srcs: extra source files that will be added to the output
|
|
py_library. This attribute is used for internal bootstrapping.
|
|
include: a string indicating the include path of the .proto files.
|
|
default_runtime: the implicitly default runtime which will be depended on by
|
|
the generated py_library target.
|
|
protoc: the label of the protocol compiler to generate the sources.
|
|
**kargs: other keyword arguments that are passed to cc_library.
|
|
|
|
"""
|
|
outs = _PyOuts(srcs)
|
|
|
|
includes = []
|
|
if include != None:
|
|
includes = [include]
|
|
|
|
_proto_gen(
|
|
name=name + "_genproto",
|
|
srcs=srcs,
|
|
deps=[s + "_genproto" for s in deps],
|
|
includes=includes,
|
|
protoc=protoc,
|
|
gen_py=1,
|
|
outs=outs,
|
|
)
|
|
|
|
if include != None:
|
|
# Copy the output files to the desired location to make the import work.
|
|
internal_copied_filegroup_name=name + "_internal_copied_filegroup"
|
|
internal_copied_filegroup(
|
|
name=internal_copied_filegroup_name,
|
|
srcs=outs,
|
|
include=include)
|
|
outs=[internal_copied_filegroup_name]
|
|
|
|
if default_runtime and not default_runtime in py_libs + deps:
|
|
py_libs += [default_runtime]
|
|
|
|
native.py_library(
|
|
name=name,
|
|
srcs=outs+py_extra_srcs,
|
|
deps=py_libs+deps,
|
|
**kargs)
|
|
|
|
def internal_protobuf_py_tests(
|
|
name,
|
|
modules=[],
|
|
**kargs):
|
|
"""Bazel rules to create batch tests for protobuf internal.
|
|
|
|
Args:
|
|
name: the name of the rule.
|
|
modules: a list of modules for tests. The macro will create a py_test for
|
|
each of the parameter with the source "google/protobuf/%s.py"
|
|
kargs: extra parameters that will be passed into the py_test.
|
|
|
|
"""
|
|
for m in modules:
|
|
s = _RelativeOutputPath(
|
|
"python/google/protobuf/internal/%s.py" % m, "python")
|
|
native.py_test(
|
|
name="py_%s" % m,
|
|
srcs=[s],
|
|
main=s,
|
|
**kargs)
|