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# Copyright 2014 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This is a quick and dirty rule to make Bazel compile itself. It
# only supports Java.
# TODO(bazel-team): unify the OSS Java rules and load from another
# file.
jar_filetype = FileType([".jar"])
proto_filetype = FileType([".proto"])
def genproto_impl(ctx):
src = ctx.file.src
proto_compiler = ctx.file._proto_compiler
proto_dep = ctx.file._proto_dep
class_jar = ctx.outputs.java
proto_output = class_jar.path + ".proto_output"
build_output = class_jar.path + ".build_output"
inputs = [src, proto_dep, proto_compiler]
proto_compiler_path = proto_compiler.path
javapath = "tools/jdk/jdk/bin/"
cmd = ("set -e;" +
"rm -rf " + proto_output + ";" +
"mkdir " + proto_output + ";" +
"rm -rf " + build_output + ";" +
"mkdir " + build_output + "\n" +
proto_compiler_path + " --java_out=" +
proto_output +" " + src.path + "\n" +
"JAVA_FILES=$(find " + proto_output + " -name '*.java')\n" +
javapath + "javac" + " -classpath " + proto_dep.path +
" ${JAVA_FILES} -d " + build_output + "\n" +
javapath + "jar cf " + class_jar.path + " -C " + build_output + " .\n")
ctx.action(
inputs = inputs,
outputs = [class_jar],
mnemonic = 'CompileProtos',
command = cmd,
use_default_shell_env = True)
return struct(compile_time_jars = set([class_jar]),
runtime_jars = set([class_jar, proto_dep], order="link"))
genproto = rule(genproto_impl,
# There should be a flag like gen_java, and only generate the jar if it's
# set. Skylark needs a bit of improvement first (concat structs).
attrs = {
"src": attr.label(allow_files=proto_filetype, single_file=True),
# TODO(bazel-team): this should be a hidden attribute with a default
# value, but Skylark needs to support select first.
"_proto_compiler": attr.label(
default=Label("//third_party:protoc"),
allow_files=True,
single_file=True),
"_proto_dep": attr.label(
default=Label("//third_party:protobuf"),
single_file=True,
allow_files=jar_filetype,
),
},
outputs = {"java": "lib%{name}.jar"},
)
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