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// Copyright 2014 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.
package com.google.devtools.build.lib.rules.java;
import static com.google.devtools.build.lib.packages.Attribute.ConfigurationTransition.HOST;
import static com.google.devtools.build.lib.packages.Attribute.attr;
import static com.google.devtools.build.lib.packages.BuildType.LABEL_LIST;
import static com.google.devtools.build.lib.syntax.Type.STRING;
import static com.google.devtools.build.lib.syntax.Type.STRING_LIST;
import static com.google.devtools.build.lib.syntax.Type.STRING_LIST_DICT;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.analysis.BaseRuleClasses;
import com.google.devtools.build.lib.analysis.RuleDefinition;
import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
import com.google.devtools.build.lib.packages.RuleClass;
import com.google.devtools.build.lib.packages.RuleClass.Builder;
import com.google.devtools.build.lib.util.FileTypeSet;
import java.util.List;
/**
* Rule definition for {@code java_toolchain}
*/
public final class JavaToolchainRule implements RuleDefinition {
@Override
public RuleClass build(Builder builder, RuleDefinitionEnvironment env) {
return builder
.requiresConfigurationFragments(JavaConfiguration.class)
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(source_version) -->
The Java source version (e.g., '6' or '7'). It specifies which set of code structures
are allowed in the Java source code.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(attr("source_version", STRING).mandatory()) // javac -source flag value.
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(target_version) -->
The Java target version (e.g., '6' or '7'). It specifies for which Java runtime the class
should be build.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(attr("target_version", STRING).mandatory()) // javac -target flag value.
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(bootclasspath) -->
The Java target exdir entries. Corresponds to javac's -bootclasspath flag.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(
attr("bootclasspath", LABEL_LIST)
.mandatory()
.cfg(HOST)
.allowedFileTypes(FileTypeSet.ANY_FILE))
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(extclasspath) -->
The Java target exdir entries. Corresponds to javac's -extdir flag.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(
attr("extclasspath", LABEL_LIST)
.mandatory()
.cfg(HOST)
.allowedFileTypes(FileTypeSet.ANY_FILE))
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(encoding) -->
The encoding of the java files (e.g., 'UTF-8').
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(attr("encoding", STRING).mandatory()) // javac -encoding flag value.
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(xlint) -->
The list of warning to add or removes from default list. Precedes it with a dash to
removes it. Please see the Javac documentation on the -Xlint options for more information.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(attr("xlint", STRING_LIST).value(ImmutableList.<String>of()))
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(misc) -->
The list of extra arguments for the Java compiler. Please refer to the Java compiler
documentation for the extensive list of possible Java compiler flags.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(attr("misc", STRING_LIST).value(ImmutableList.<String>of()))
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(jvm_opts) -->
The list of arguments for the JVM when invoking the Java compiler. Please refer to the Java
virtual machine documentation for the extensive list of possible flags for this option.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(
attr("jvm_opts", STRING_LIST)
.value(
ImmutableList.<String>of("-XX:+TieredCompilation", "-XX:TieredStopAtLevel=1")))
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(javac) -->
Label of the javac jar.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(attr("javac", LABEL_LIST).mandatory().cfg(HOST).allowedFileTypes(FileTypeSet.ANY_FILE))
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(javabuilder) -->
Label of the JavaBuilder deploy jar.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(
attr("javabuilder", LABEL_LIST)
.mandatory()
.cfg(HOST)
.allowedFileTypes(FileTypeSet.ANY_FILE)
.exec())
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(singlejar) -->
Label of the SingleJar deploy jar.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(
attr("singlejar", LABEL_LIST)
.mandatory()
.cfg(HOST)
.allowedFileTypes(FileTypeSet.ANY_FILE)
.exec())
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(genclass) -->
Label of the GenClass deploy jar.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(
attr("genclass", LABEL_LIST)
.mandatory()
.cfg(HOST)
.allowedFileTypes(FileTypeSet.ANY_FILE)
.exec())
/* <!-- #BLAZE_RULE(java_toolchain).ATTRIBUTE(ijar) -->
Label of the ijar executable.
<!-- #END_BLAZE_RULE.ATTRIBUTE --> */
.add(
attr("ijar", LABEL_LIST)
.mandatory()
.cfg(HOST)
.allowedFileTypes(FileTypeSet.ANY_FILE)
.exec())
.add(
attr("header_compiler", LABEL_LIST)
.cfg(HOST)
.allowedFileTypes(FileTypeSet.ANY_FILE)
.exec())
.add(
attr("compatible_javacopts", STRING_LIST_DICT)
.undocumented("internal")
.value(ImmutableMap.<String, List<String>>of()))
.build();
}
@Override
public Metadata getMetadata() {
return RuleDefinition.Metadata.builder()
.name("java_toolchain")
.ancestors(BaseRuleClasses.BaseRule.class)
.factoryClass(JavaToolchain.class)
.build();
}
}
/*<!-- #BLAZE_RULE (NAME = java_toolchain, TYPE = OTHER, FAMILY = Java) -->
<p>
Specifies the configuration for the Java compiler. Which toolchain to be used can be changed through
the --java_toolchain argument. Normally you should not write those kind of rules unless you want to
tune your Java compiler.
</p>
<h4 id="java_binary_examples">Examples</h4>
<p>A simple example would be:
</p>
<pre class="code">
java_toolchain(
name = "toolchain",
source_version = "7",
target_version = "7",
bootclasspath = ["//tools/jdk:bootclasspath"],
encoding = "UTF-8",
xlint = [ "classfile", "divzero", "empty", "options", "path" ],
misc = [ "-g" ],
javabuilder = ":JavaBuilder_deploy.jar",
)
</pre>
<!-- #END_BLAZE_RULE -->*/
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