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// Copyright 2019 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 (
"bytes"
"encoding/base64"
"encoding/binary"
"path/filepath"
"strings"
"android/soong/android"
"github.com/google/blueprint"
)
var kotlinc = pctx.AndroidRemoteStaticRule("kotlinc", android.RemoteRuleSupports{Goma: true},
blueprint.RuleParams{
Command: `rm -rf "$classesDir" "$srcJarDir" "$kotlinBuildFile" "$emptyDir" && ` +
`mkdir -p "$classesDir" "$srcJarDir" "$emptyDir" && ` +
`${config.ZipSyncCmd} -d $srcJarDir -l $srcJarDir/list -f "*.java" $srcJars && ` +
`${config.GenKotlinBuildFileCmd} --classpath "$classpath" --name "$name"` +
` --out_dir "$classesDir" --srcs "$out.rsp" --srcs "$srcJarDir/list"` +
` $commonSrcFilesArg --out "$kotlinBuildFile" && ` +
`${config.KotlincCmd} ${config.JavacHeapFlags} $kotlincFlags ` +
`-jvm-target $kotlinJvmTarget -Xbuild-file=$kotlinBuildFile -kotlin-home $emptyDir && ` +
`${config.SoongZipCmd} -jar -o $out -C $classesDir -D $classesDir && ` +
`rm -rf "$srcJarDir"`,
CommandDeps: []string{
"${config.KotlincCmd}",
"${config.KotlinCompilerJar}",
"${config.KotlinPreloaderJar}",
"${config.KotlinReflectJar}",
"${config.KotlinScriptRuntimeJar}",
"${config.KotlinStdlibJar}",
"${config.KotlinTrove4jJar}",
"${config.KotlinAnnotationJar}",
"${config.GenKotlinBuildFileCmd}",
"${config.SoongZipCmd}",
"${config.ZipSyncCmd}",
},
Rspfile: "$out.rsp",
RspfileContent: `$in`,
},
"kotlincFlags", "classpath", "srcJars", "commonSrcFilesArg", "srcJarDir", "classesDir",
"kotlinJvmTarget", "kotlinBuildFile", "emptyDir", "name")
func kotlinCommonSrcsList(ctx android.ModuleContext, commonSrcFiles android.Paths) android.OptionalPath {
if len(commonSrcFiles) > 0 {
// The list of common_srcs may be too long to put on the command line, but
// we can't use the rsp file because it is already being used for srcs.
// Insert a second rule to write out the list of resources to a file.
commonSrcsList := android.PathForModuleOut(ctx, "kotlinc_common_srcs.list")
rule := android.NewRuleBuilder()
rule.Command().Text("cp").FlagWithRspFileInputList("", commonSrcFiles).Output(commonSrcsList)
rule.Build(pctx, ctx, "kotlin_common_srcs_list", "kotlin common_srcs list")
return android.OptionalPathForPath(commonSrcsList)
}
return android.OptionalPath{}
}
// kotlinCompile takes .java and .kt sources and srcJars, and compiles the .kt sources into a classes jar in outputFile.
func kotlinCompile(ctx android.ModuleContext, outputFile android.WritablePath,
srcFiles, commonSrcFiles, srcJars android.Paths,
flags javaBuilderFlags) {
var deps android.Paths
deps = append(deps, flags.kotlincClasspath...)
deps = append(deps, srcJars...)
deps = append(deps, commonSrcFiles...)
kotlinName := filepath.Join(ctx.ModuleDir(), ctx.ModuleSubDir(), ctx.ModuleName())
kotlinName = strings.ReplaceAll(kotlinName, "/", "__")
commonSrcsList := kotlinCommonSrcsList(ctx, commonSrcFiles)
commonSrcFilesArg := ""
if commonSrcsList.Valid() {
deps = append(deps, commonSrcsList.Path())
commonSrcFilesArg = "--common_srcs " + commonSrcsList.String()
}
ctx.Build(pctx, android.BuildParams{
Rule: kotlinc,
Description: "kotlinc",
Output: outputFile,
Inputs: srcFiles,
Implicits: deps,
Args: map[string]string{
"classpath": flags.kotlincClasspath.FormJavaClassPath(""),
"kotlincFlags": flags.kotlincFlags,
"commonSrcFilesArg": commonSrcFilesArg,
"srcJars": strings.Join(srcJars.Strings(), " "),
"classesDir": android.PathForModuleOut(ctx, "kotlinc", "classes").String(),
"srcJarDir": android.PathForModuleOut(ctx, "kotlinc", "srcJars").String(),
"kotlinBuildFile": android.PathForModuleOut(ctx, "kotlinc-build.xml").String(),
"emptyDir": android.PathForModuleOut(ctx, "kotlinc", "empty").String(),
// http://b/69160377 kotlinc only supports -jvm-target 1.6 and 1.8
"kotlinJvmTarget": "1.8",
"name": kotlinName,
},
})
}
var kapt = pctx.AndroidRemoteStaticRule("kapt", android.RemoteRuleSupports{Goma: true},
blueprint.RuleParams{
Command: `rm -rf "$srcJarDir" "$kotlinBuildFile" "$kaptDir" && ` +
`mkdir -p "$srcJarDir" "$kaptDir/sources" "$kaptDir/classes" && ` +
`${config.ZipSyncCmd} -d $srcJarDir -l $srcJarDir/list -f "*.java" $srcJars && ` +
`${config.GenKotlinBuildFileCmd} --classpath "$classpath" --name "$name"` +
` --srcs "$out.rsp" --srcs "$srcJarDir/list"` +
` $commonSrcFilesArg --out "$kotlinBuildFile" && ` +
`${config.KotlincCmd} ${config.KotlincSuppressJDK9Warnings} ${config.JavacHeapFlags} $kotlincFlags ` +
`-Xplugin=${config.KotlinKaptJar} ` +
`-P plugin:org.jetbrains.kotlin.kapt3:sources=$kaptDir/sources ` +
`-P plugin:org.jetbrains.kotlin.kapt3:classes=$kaptDir/classes ` +
`-P plugin:org.jetbrains.kotlin.kapt3:stubs=$kaptDir/stubs ` +
`-P plugin:org.jetbrains.kotlin.kapt3:correctErrorTypes=true ` +
`-P plugin:org.jetbrains.kotlin.kapt3:aptMode=stubsAndApt ` +
`-P plugin:org.jetbrains.kotlin.kapt3:javacArguments=$encodedJavacFlags ` +
`$kaptProcessorPath ` +
`$kaptProcessor ` +
`-Xbuild-file=$kotlinBuildFile && ` +
`${config.SoongZipCmd} -jar -o $out -C $kaptDir/sources -D $kaptDir/sources && ` +
`${config.SoongZipCmd} -jar -o $classesJarOut -C $kaptDir/classes -D $kaptDir/classes && ` +
`rm -rf "$srcJarDir"`,
CommandDeps: []string{
"${config.KotlincCmd}",
"${config.KotlinCompilerJar}",
"${config.KotlinKaptJar}",
"${config.GenKotlinBuildFileCmd}",
"${config.SoongZipCmd}",
"${config.ZipSyncCmd}",
},
Rspfile: "$out.rsp",
RspfileContent: `$in`,
},
"kotlincFlags", "encodedJavacFlags", "kaptProcessorPath", "kaptProcessor",
"classpath", "srcJars", "commonSrcFilesArg", "srcJarDir", "kaptDir", "kotlinJvmTarget",
"kotlinBuildFile", "name", "classesJarOut")
// kotlinKapt performs Kotlin-compatible annotation processing. It takes .kt and .java sources and srcjars, and runs
// annotation processors over all of them, producing a srcjar of generated code in outputFile. The srcjar should be
// added as an additional input to kotlinc and javac rules, and the javac rule should have annotation processing
// disabled.
func kotlinKapt(ctx android.ModuleContext, srcJarOutputFile, resJarOutputFile android.WritablePath,
srcFiles, commonSrcFiles, srcJars android.Paths,
flags javaBuilderFlags) {
srcFiles = append(android.Paths(nil), srcFiles...)
var deps android.Paths
deps = append(deps, flags.kotlincClasspath...)
deps = append(deps, srcJars...)
deps = append(deps, flags.processorPath...)
deps = append(deps, commonSrcFiles...)
commonSrcsList := kotlinCommonSrcsList(ctx, commonSrcFiles)
commonSrcFilesArg := ""
if commonSrcsList.Valid() {
deps = append(deps, commonSrcsList.Path())
commonSrcFilesArg = "--common_srcs " + commonSrcsList.String()
}
kaptProcessorPath := flags.processorPath.FormRepeatedClassPath("-P plugin:org.jetbrains.kotlin.kapt3:apclasspath=")
kaptProcessor := ""
for i, p := range flags.processors {
if i > 0 {
kaptProcessor += " "
}
kaptProcessor += "-P plugin:org.jetbrains.kotlin.kapt3:processors=" + p
}
encodedJavacFlags := kaptEncodeFlags([][2]string{
{"-source", flags.javaVersion.String()},
{"-target", flags.javaVersion.String()},
})
kotlinName := filepath.Join(ctx.ModuleDir(), ctx.ModuleSubDir(), ctx.ModuleName())
kotlinName = strings.ReplaceAll(kotlinName, "/", "__")
ctx.Build(pctx, android.BuildParams{
Rule: kapt,
Description: "kapt",
Output: srcJarOutputFile,
ImplicitOutput: resJarOutputFile,
Inputs: srcFiles,
Implicits: deps,
Args: map[string]string{
"classpath": flags.kotlincClasspath.FormJavaClassPath(""),
"kotlincFlags": flags.kotlincFlags,
"commonSrcFilesArg": commonSrcFilesArg,
"srcJars": strings.Join(srcJars.Strings(), " "),
"srcJarDir": android.PathForModuleOut(ctx, "kapt", "srcJars").String(),
"kotlinBuildFile": android.PathForModuleOut(ctx, "kapt", "build.xml").String(),
"kaptProcessorPath": strings.Join(kaptProcessorPath, " "),
"kaptProcessor": kaptProcessor,
"kaptDir": android.PathForModuleOut(ctx, "kapt/gen").String(),
"encodedJavacFlags": encodedJavacFlags,
"name": kotlinName,
"classesJarOut": resJarOutputFile.String(),
},
})
}
// kapt converts a list of key, value pairs into a base64 encoded Java serialization, which is what kapt expects.
func kaptEncodeFlags(options [][2]string) string {
buf := &bytes.Buffer{}
binary.Write(buf, binary.BigEndian, uint32(len(options)))
for _, option := range options {
binary.Write(buf, binary.BigEndian, uint16(len(option[0])))
buf.WriteString(option[0])
binary.Write(buf, binary.BigEndian, uint16(len(option[1])))
buf.WriteString(option[1])
}
header := &bytes.Buffer{}
header.Write([]byte{0xac, 0xed, 0x00, 0x05}) // java serialization header
if buf.Len() < 256 {
header.WriteByte(0x77) // blockdata
header.WriteByte(byte(buf.Len()))
} else {
header.WriteByte(0x7a) // blockdatalong
binary.Write(header, binary.BigEndian, uint32(buf.Len()))
}
return base64.StdEncoding.EncodeToString(append(header.Bytes(), buf.Bytes()...))
}
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