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/*
* Copyright (C) 2022 The Android Open Source Project
*
* 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.android.builder.dexing
import com.android.tools.r8.ByteDataView
import com.android.tools.r8.DiagnosticsHandler
import com.android.tools.r8.GlobalSyntheticsConsumer
import com.android.tools.r8.references.ClassReference
import com.android.utils.FileUtils
import java.io.FileOutputStream
import java.nio.file.Path
/**
* [D8GlobalSyntheticsConsumer] is used by D8 to write global synthetics to our custom location.
*/
class D8GlobalSyntheticsConsumer(val globalSyntheticsOutput: Path) : GlobalSyntheticsConsumer {
override fun accept(
data: ByteDataView?,
context: ClassReference?,
handler: DiagnosticsHandler?
) {
if (data == null) return
// context exist if and only if d8 is running with dexPerClassFile mode
val outputFile = if (context != null) {
// when context exist, each global file name is computed based on the class that
// global synthetics are generated from
globalSyntheticsOutput.resolve(
// context.binaryName + .class is guaranteed to be the same as classFileRelativePath
DexFilePerClassFile
.getGlobalSyntheticOutputRelativePath(context.binaryName + ".class")
)
} else {
// when context doesn't exist, globals are output to a single file under
// globalSyntheticsOutput directory
globalSyntheticsOutput.resolve(bundledGlobalSyntheticsFileName + globalSyntheticsFileExtension)
}.toFile()
FileUtils.mkdirs(outputFile.parentFile)
// accept function is only called at most once for given context, so we can rewrite
// modified files
FileUtils.deleteIfExists(outputFile)
FileOutputStream(outputFile).buffered().use {
it.write(
data.buffer,
data.offset,
data.length
)
}
}
}
private const val bundledGlobalSyntheticsFileName = "global"
const val globalSyntheticsFileExtension = ".globals"
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