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// Copyright 2017 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.
package java
import (
"fmt"
"io"
"strings"
"github.com/google/blueprint"
"android/soong/android"
)
// OpenJDK 9 introduces the concept of "system modules", which replace the bootclasspath. This
// file will produce the rules necessary to convert each unique set of bootclasspath jars into
// system modules in a runtime image using the jmod and jlink tools.
func init() {
RegisterSystemModulesBuildComponents(android.InitRegistrationContext)
pctx.SourcePathVariable("moduleInfoJavaPath", "build/soong/scripts/jars-to-module-info-java.sh")
}
func RegisterSystemModulesBuildComponents(ctx android.RegistrationContext) {
ctx.RegisterModuleType("java_system_modules", SystemModulesFactory)
ctx.RegisterModuleType("java_system_modules_import", systemModulesImportFactory)
}
var (
jarsTosystemModules = pctx.AndroidStaticRule("jarsTosystemModules", blueprint.RuleParams{
Command: `rm -rf ${outDir} ${workDir} && mkdir -p ${workDir}/jmod && ` +
`${moduleInfoJavaPath} java.base $in > ${workDir}/module-info.java && ` +
`${config.JavacCmd} --system=none --patch-module=java.base=${classpath} ${workDir}/module-info.java && ` +
`${config.SoongZipCmd} -jar -o ${workDir}/classes.jar -C ${workDir} -f ${workDir}/module-info.class && ` +
`${config.MergeZipsCmd} -j ${workDir}/module.jar ${workDir}/classes.jar $in && ` +
// Note: The version of the java.base module created must match the version
// of the jlink tool which consumes it.
`${config.JmodCmd} create --module-version ${config.JlinkVersion} --target-platform android ` +
` --class-path ${workDir}/module.jar ${workDir}/jmod/java.base.jmod && ` +
`${config.JlinkCmd} --module-path ${workDir}/jmod --add-modules java.base --output ${outDir} ` +
// Note: The system-modules jlink plugin is disabled because (a) it is not
// useful on Android, and (b) it causes errors with later versions of jlink
// when the jdk.internal.module is absent from java.base (as it is here).
` --disable-plugin system-modules && ` +
`cp ${config.JrtFsJar} ${outDir}/lib/`,
CommandDeps: []string{
"${moduleInfoJavaPath}",
"${config.JavacCmd}",
"${config.SoongZipCmd}",
"${config.MergeZipsCmd}",
"${config.JmodCmd}",
"${config.JlinkCmd}",
"${config.JrtFsJar}",
},
},
"classpath", "outDir", "workDir")
)
func TransformJarsToSystemModules(ctx android.ModuleContext, jars android.Paths) (android.Path, android.Paths) {
outDir := android.PathForModuleOut(ctx, "system")
workDir := android.PathForModuleOut(ctx, "modules")
outputFile := android.PathForModuleOut(ctx, "system/lib/modules")
outputs := android.WritablePaths{
outputFile,
android.PathForModuleOut(ctx, "system/lib/jrt-fs.jar"),
android.PathForModuleOut(ctx, "system/release"),
}
ctx.Build(pctx, android.BuildParams{
Rule: jarsTosystemModules,
Description: "system modules",
Outputs: outputs,
Inputs: jars,
Args: map[string]string{
"classpath": strings.Join(jars.Strings(), ":"),
"workDir": workDir.String(),
"outDir": outDir.String(),
},
})
return outDir, outputs.Paths()
}
// java_system_modules creates a system module from a set of java libraries that can
// be referenced from the system_modules property. It must contain at a minimum the
// java.base module which must include classes from java.lang amongst other java packages.
func SystemModulesFactory() android.Module {
module := &SystemModules{}
module.AddProperties(&module.properties)
android.InitAndroidArchModule(module, android.HostAndDeviceSupported, android.MultilibCommon)
android.InitDefaultableModule(module)
return module
}
type SystemModules struct {
android.ModuleBase
android.DefaultableModuleBase
properties SystemModulesProperties
// The aggregated header jars from all jars specified in the libs property.
// Used when system module is added as a dependency to bootclasspath.
headerJars android.Paths
outputDir android.Path
outputDeps android.Paths
}
type SystemModulesProperties struct {
// List of java library modules that should be included in the system modules
Libs []string
}
func (system *SystemModules) GenerateAndroidBuildActions(ctx android.ModuleContext) {
var jars android.Paths
ctx.VisitDirectDepsWithTag(libTag, func(module android.Module) {
dep, _ := module.(Dependency)
jars = append(jars, dep.HeaderJars()...)
})
system.headerJars = jars
system.outputDir, system.outputDeps = TransformJarsToSystemModules(ctx, jars)
}
func (system *SystemModules) DepsMutator(ctx android.BottomUpMutatorContext) {
ctx.AddVariationDependencies(nil, libTag, system.properties.Libs...)
}
func (system *SystemModules) AndroidMk() android.AndroidMkData {
return android.AndroidMkData{
Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
fmt.Fprintln(w)
makevar := "SOONG_SYSTEM_MODULES_" + name
fmt.Fprintln(w, makevar, ":=$=", system.outputDir.String())
fmt.Fprintln(w)
makevar = "SOONG_SYSTEM_MODULES_LIBS_" + name
fmt.Fprintln(w, makevar, ":=$=", strings.Join(system.properties.Libs, " "))
fmt.Fprintln(w)
makevar = "SOONG_SYSTEM_MODULES_DEPS_" + name
fmt.Fprintln(w, makevar, ":=$=", strings.Join(system.outputDeps.Strings(), " "))
fmt.Fprintln(w)
fmt.Fprintln(w, name+":", "$("+makevar+")")
fmt.Fprintln(w, ".PHONY:", name)
},
}
}
// A prebuilt version of java_system_modules. It does not import the
// generated system module, it generates the system module from imported
// java libraries in the same way that java_system_modules does. It just
// acts as a prebuilt, i.e. can have the same base name as another module
// type and the one to use is selected at runtime.
func systemModulesImportFactory() android.Module {
module := &systemModulesImport{}
module.AddProperties(&module.properties)
android.InitPrebuiltModule(module, &module.properties.Libs)
android.InitAndroidArchModule(module, android.HostAndDeviceSupported, android.MultilibCommon)
android.InitDefaultableModule(module)
return module
}
type systemModulesImport struct {
SystemModules
prebuilt android.Prebuilt
}
func (system *systemModulesImport) Name() string {
return system.prebuilt.Name(system.ModuleBase.Name())
}
func (system *systemModulesImport) Prebuilt() *android.Prebuilt {
return &system.prebuilt
}
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