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
|
# 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:$(location @bazel_tools//third_party/java/jdk/langtools:javac_jar)",
]
JDK9_JVM_OPTS = [
# In JDK9 we have seen a ~30% slow down in JavaBuilder performance when using
# G1 collector and having compact strings enabled.
"-XX:+UseParallelOldGC",
"-XX:-CompactStrings",
# Allow JavaBuilder to access internal javac APIs.
"--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED",
"--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED",
"--add-opens=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED",
# override the javac in the JDK.
"--patch-module=java.compiler=$(location @bazel_tools//third_party/java/jdk/langtools:java_compiler_jar)",
"--patch-module=jdk.compiler=$(location @bazel_tools//third_party/java/jdk/langtools:jdk_compiler_jar)",
# quiet warnings from com.google.protobuf.UnsafeUtil,
# see: https://github.com/google/protobuf/issues/3781
"--add-opens=java.base/java.nio=ALL-UNNAMED",
]
DEFAULT_JAVACOPTS = [
"-XDskipDuplicateBridges=true",
"-g",
"-parameters",
]
PROTO_JAVACOPTS = [
# Restrict protos to Java 7 so that they are compatible with Android.
"-source",
"7",
"-target",
"7",
]
COMPATIBLE_JAVACOPTS = {
"proto": PROTO_JAVACOPTS,
}
DEFAULT_TOOLCHAIN_CONFIGURATION = {
"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": ["@bazel_tools//third_party/java/jdk/langtools:javac_jar"],
"tools": [
"@bazel_tools//third_party/java/jdk/langtools:java_compiler_jar",
"@bazel_tools//third_party/java/jdk/langtools:jdk_compiler_jar",
],
"javac_supports_workers": 1,
"jvm_opts": JDK8_JVM_OPTS,
"misc": DEFAULT_JAVACOPTS,
"compatible_javacopts": COMPATIBLE_JAVACOPTS,
"singlejar": ["@bazel_tools//tools/jdk:singlejar"],
}
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
)
|
