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# Copyright 2017 The Bazel Authors. 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.
"""Bazel rules for creating Java toolchains."""
JDK8_JVM_OPTS = [
"-Xbootclasspath/p:$(location //third_party/java/jdk/langtools:javac_jar)",
]
JDK9_JVM_OPTS = [
# Allow JavaBuilder to access internal javac APIs.
"--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED",
"--add-opens=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED",
# TODO(cushon): override the javac in the JDK.
# "--patch-module=java.compiler=$(location //third_party/java/jdk/langtools/blaze:java_compiler_jar)",
# "--patch-module=jdk.compiler=$(location //third_party/java/jdk/langtools/blaze:jdk_compiler_jar)",
]
DEFAULT_COMPATIBLE_JAVACOPTS = {
# Restrict protos to Java 7 so that they are compatible with Android.
"proto": [
"-source",
"7",
"-target",
"7",
],
}
DEFAULT_JAVACOPTS = [
"-XDskipDuplicateBridges=true",
"-g",
"-parameters",
]
DEFAULT_TOOLCHAIN_CONFIGURATION = {
# javac -extdirs is implemented by appending the contents to the platform
# class path after -bootclasspath. For convenience, we currently have a
# single jar that contains the contents of both the bootclasspath and
# extdirs.
"bootclasspath": ["@bazel_tools//tools/jdk:platformclasspath.jar"],
"extclasspath": [],
"compatible_javacopts": DEFAULT_COMPATIBLE_JAVACOPTS,
"encoding": "UTF-8",
"forcibly_disable_header_compilation": 0,
"genclass": ["@bazel_tools//tools/jdk:genclass"],
"header_compiler": ["@bazel_tools//tools/jdk:turbine"],
"ijar": ["@bazel_tools//tools/jdk:ijar"],
"javabuilder": ["@bazel_tools//tools/jdk:javabuilder"],
"javac": ["//third_party/java/jdk/langtools:javac_jar"],
"javac_supports_workers": 1,
"jvm_opts": JDK8_JVM_OPTS,
"misc": DEFAULT_JAVACOPTS,
"singlejar": ["@bazel_tools//tools/jdk:singlejar"],
"source_version": "8",
"target_version": "8",
}
def default_java_toolchain(name, **kwargs):
"""Defines a java_toolchain with appropriate defaults for Bazel."""
toolchain_args = dict(DEFAULT_TOOLCHAIN_CONFIGURATION)
toolchain_args.update(kwargs)
native.java_toolchain(
name = name,
**toolchain_args
)
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