403 lines
12 KiB
Python
403 lines
12 KiB
Python
def _GetPath(ctx, path):
|
|
if ctx.label.workspace_root:
|
|
return ctx.label.workspace_root + '/' + path
|
|
else:
|
|
return path
|
|
|
|
def _IsNewExternal(ctx):
|
|
# Bazel 0.4.4 and older have genfiles paths that look like:
|
|
# bazel-out/local-fastbuild/genfiles/external/repo/foo
|
|
# After the exec root rearrangement, they look like:
|
|
# ../repo/bazel-out/local-fastbuild/genfiles/foo
|
|
return ctx.label.workspace_root.startswith("../")
|
|
|
|
def _GenDir(ctx):
|
|
if _IsNewExternal(ctx):
|
|
# We are using the fact that Bazel 0.4.4+ provides repository-relative paths
|
|
# for ctx.genfiles_dir.
|
|
return ctx.genfiles_dir.path + (
|
|
"/" + ctx.attr.includes[0] if ctx.attr.includes and ctx.attr.includes[0] else "")
|
|
# This means that we're either in the old version OR the new version in the local repo.
|
|
# Either way, appending the source path to the genfiles dir works.
|
|
return ctx.var["GENDIR"] + "/" + _SourceDir(ctx)
|
|
|
|
def _SourceDir(ctx):
|
|
if not ctx.attr.includes:
|
|
return ctx.label.workspace_root
|
|
if not ctx.attr.includes[0]:
|
|
return _GetPath(ctx, ctx.label.package)
|
|
if not ctx.label.package:
|
|
return _GetPath(ctx, ctx.attr.includes[0])
|
|
return _GetPath(ctx, ctx.label.package + '/' + ctx.attr.includes[0])
|
|
|
|
def _CcHdrs(srcs, use_grpc_plugin=False):
|
|
ret = [s[:-len(".proto")] + ".pb.h" for s in srcs]
|
|
if use_grpc_plugin:
|
|
ret += [s[:-len(".proto")] + ".grpc.pb.h" for s in srcs]
|
|
return ret
|
|
|
|
def _CcSrcs(srcs, use_grpc_plugin=False):
|
|
ret = [s[:-len(".proto")] + ".pb.cc" for s in srcs]
|
|
if use_grpc_plugin:
|
|
ret += [s[:-len(".proto")] + ".grpc.pb.cc" for s in srcs]
|
|
return ret
|
|
|
|
def _CcOuts(srcs, use_grpc_plugin=False):
|
|
return _CcHdrs(srcs, use_grpc_plugin) + _CcSrcs(srcs, use_grpc_plugin)
|
|
|
|
def _PyOuts(srcs):
|
|
return [s[:-len(".proto")] + "_pb2.py" for s in srcs]
|
|
|
|
def _RelativeOutputPath(path, include, dest=""):
|
|
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 + '/'
|
|
if dest and dest[-1] != '/':
|
|
dest = dest + '/'
|
|
|
|
path = path[len(include):]
|
|
return dest + path
|
|
|
|
def _proto_gen_impl(ctx):
|
|
"""General implementation for generating protos"""
|
|
srcs = ctx.files.srcs
|
|
deps = []
|
|
deps += ctx.files.srcs
|
|
source_dir = _SourceDir(ctx)
|
|
gen_dir = _GenDir(ctx)
|
|
if source_dir:
|
|
import_flags = ["-I" + source_dir, "-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=" + gen_dir]
|
|
if ctx.attr.gen_py:
|
|
args += ["--python_out=" + gen_dir]
|
|
|
|
inputs = srcs + deps
|
|
if ctx.executable.plugin:
|
|
plugin = ctx.executable.plugin
|
|
lang = ctx.attr.plugin_language
|
|
if not lang and plugin.basename.startswith('protoc-gen-'):
|
|
lang = plugin.basename[len('protoc-gen-'):]
|
|
if not lang:
|
|
fail("cannot infer the target language of plugin", "plugin_language")
|
|
|
|
outdir = gen_dir
|
|
if ctx.attr.plugin_options:
|
|
outdir = ",".join(ctx.attr.plugin_options) + ":" + outdir
|
|
args += ["--plugin=protoc-gen-%s=%s" % (lang, plugin.path)]
|
|
args += ["--%s_out=%s" % (lang, outdir)]
|
|
inputs += [plugin]
|
|
|
|
if args:
|
|
ctx.action(
|
|
inputs=inputs,
|
|
outputs=ctx.outputs.outs,
|
|
arguments=args + import_flags + [s.path for s in srcs],
|
|
executable=ctx.executable.protoc,
|
|
mnemonic="ProtoCompile",
|
|
use_default_shell_env=True,
|
|
)
|
|
|
|
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",
|
|
executable = True,
|
|
single_file = True,
|
|
mandatory = True,
|
|
),
|
|
"plugin": attr.label(
|
|
cfg = "host",
|
|
allow_files = True,
|
|
executable = True,
|
|
),
|
|
"plugin_language": attr.string(),
|
|
"plugin_options": attr.string_list(),
|
|
"gen_cc": attr.bool(),
|
|
"gen_py": attr.bool(),
|
|
"outs": attr.output_list(),
|
|
},
|
|
output_to_genfiles = True,
|
|
implementation = _proto_gen_impl,
|
|
)
|
|
"""Generates codes from Protocol Buffers definitions.
|
|
|
|
This rule helps you to implement Skylark macros specific to the target
|
|
language. You should prefer more specific `cc_proto_library `,
|
|
`py_proto_library` and others unless you are adding such wrapper macros.
|
|
|
|
Args:
|
|
srcs: Protocol Buffers definition files (.proto) to run the protocol compiler
|
|
against.
|
|
deps: a list of dependency labels; must be other proto libraries.
|
|
includes: a list of include paths to .proto files.
|
|
protoc: the label of the protocol compiler to generate the sources.
|
|
plugin: the label of the protocol compiler plugin to be passed to the protocol
|
|
compiler.
|
|
plugin_language: the language of the generated sources
|
|
plugin_options: a list of options to be passed to the plugin
|
|
gen_cc: generates C++ sources in addition to the ones from the plugin.
|
|
gen_py: generates Python sources in addition to the ones from the plugin.
|
|
outs: a list of labels of the expected outputs from the protocol compiler.
|
|
"""
|
|
|
|
def cc_proto_library(
|
|
name,
|
|
srcs=[],
|
|
deps=[],
|
|
cc_libs=[],
|
|
include=None,
|
|
protoc="//:protoc",
|
|
internal_bootstrap_hack=False,
|
|
use_grpc_plugin=False,
|
|
default_runtime="//: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.
|
|
use_grpc_plugin: a flag to indicate whether to call the grpc C++ plugin
|
|
when processing the proto files.
|
|
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,
|
|
visibility=["//visibility:public"],
|
|
)
|
|
# An empty cc_library to make rule dependency consistent.
|
|
native.cc_library(
|
|
name=name,
|
|
**kargs)
|
|
return
|
|
|
|
grpc_cpp_plugin = None
|
|
if use_grpc_plugin:
|
|
grpc_cpp_plugin = "//external:grpc_cpp_plugin"
|
|
|
|
gen_srcs = _CcSrcs(srcs, use_grpc_plugin)
|
|
gen_hdrs = _CcHdrs(srcs, use_grpc_plugin)
|
|
outs = gen_srcs + gen_hdrs
|
|
|
|
proto_gen(
|
|
name=name + "_genproto",
|
|
srcs=srcs,
|
|
deps=[s + "_genproto" for s in deps],
|
|
includes=includes,
|
|
protoc=protoc,
|
|
plugin=grpc_cpp_plugin,
|
|
plugin_language="grpc",
|
|
gen_cc=1,
|
|
outs=outs,
|
|
visibility=["//visibility:public"],
|
|
)
|
|
|
|
if default_runtime and not default_runtime in cc_libs:
|
|
cc_libs += [default_runtime]
|
|
if use_grpc_plugin:
|
|
cc_libs += ["//external:grpc_lib"]
|
|
|
|
native.cc_library(
|
|
name=name,
|
|
srcs=gen_srcs,
|
|
hdrs=gen_hdrs,
|
|
deps=cc_libs + deps,
|
|
includes=includes,
|
|
**kargs)
|
|
|
|
def internal_gen_well_known_protos_java(srcs):
|
|
"""Bazel rule to generate the gen_well_known_protos_java genrule
|
|
|
|
Args:
|
|
srcs: the well known protos
|
|
"""
|
|
root = Label("%s//protobuf_java" % (REPOSITORY_NAME)).workspace_root
|
|
pkg = PACKAGE_NAME + "/" if PACKAGE_NAME else ""
|
|
if root == "":
|
|
include = " -I%ssrc " % pkg
|
|
else:
|
|
include = " -I%s/%ssrc " % (root, pkg)
|
|
native.genrule(
|
|
name = "gen_well_known_protos_java",
|
|
srcs = srcs,
|
|
outs = [
|
|
"wellknown.srcjar",
|
|
],
|
|
cmd = "$(location :protoc) --java_out=$(@D)/wellknown.jar" +
|
|
" %s $(SRCS) " % include +
|
|
" && mv $(@D)/wellknown.jar $(@D)/wellknown.srcjar",
|
|
tools = [":protoc"],
|
|
)
|
|
|
|
def internal_copied_filegroup(name, srcs, strip_prefix, dest, **kwargs):
|
|
"""Macro to copy files to a different directory and then create a filegroup.
|
|
|
|
This is used by the //:protobuf_python py_proto_library target to work around
|
|
an issue caused by Python source files that are part of the same Python
|
|
package being in separate directories.
|
|
|
|
Args:
|
|
srcs: The source files to copy and add to the filegroup.
|
|
strip_prefix: Path to the root of the files to copy.
|
|
dest: The directory to copy the source files into.
|
|
**kwargs: extra arguments that will be passesd to the filegroup.
|
|
"""
|
|
outs = [_RelativeOutputPath(s, strip_prefix, dest) for s in srcs]
|
|
|
|
native.genrule(
|
|
name = name + "_genrule",
|
|
srcs = srcs,
|
|
outs = outs,
|
|
cmd = " && ".join(
|
|
["cp $(location %s) $(location %s)" %
|
|
(s, _RelativeOutputPath(s, strip_prefix, dest)) for s in srcs]),
|
|
)
|
|
|
|
native.filegroup(
|
|
name = name,
|
|
srcs = outs,
|
|
**kwargs)
|
|
|
|
def py_proto_library(
|
|
name,
|
|
srcs=[],
|
|
deps=[],
|
|
py_libs=[],
|
|
py_extra_srcs=[],
|
|
include=None,
|
|
default_runtime="//:protobuf_python",
|
|
protoc="//:protoc",
|
|
use_grpc_plugin=False,
|
|
**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.
|
|
use_grpc_plugin: a flag to indicate whether to call the Python C++ plugin
|
|
when processing the proto files.
|
|
**kargs: other keyword arguments that are passed to cc_library.
|
|
|
|
"""
|
|
outs = _PyOuts(srcs)
|
|
|
|
includes = []
|
|
if include != None:
|
|
includes = [include]
|
|
|
|
grpc_python_plugin = None
|
|
if use_grpc_plugin:
|
|
grpc_python_plugin = "//external:grpc_python_plugin"
|
|
# Note: Generated grpc code depends on Python grpc module. This dependency
|
|
# is not explicitly listed in py_libs. Instead, host system is assumed to
|
|
# have grpc installed.
|
|
|
|
proto_gen(
|
|
name=name + "_genproto",
|
|
srcs=srcs,
|
|
deps=[s + "_genproto" for s in deps],
|
|
includes=includes,
|
|
protoc=protoc,
|
|
gen_py=1,
|
|
outs=outs,
|
|
visibility=["//visibility:public"],
|
|
plugin=grpc_python_plugin,
|
|
plugin_language="grpc"
|
|
)
|
|
|
|
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,
|
|
imports=includes,
|
|
**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 = "python/google/protobuf/internal/%s.py" % m
|
|
native.py_test(
|
|
name="py_%s" % m,
|
|
srcs=[s],
|
|
main=s,
|
|
**kargs)
|