Alexander Udalov
94 lines
3.2 KiB
Kotlin
94 lines
3.2 KiB
Kotlin
/*
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* Copyright 2010-2015 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import org.jetbrains.org.objectweb.asm.*
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import java.io.BufferedOutputStream
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import java.io.File
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import java.io.FileOutputStream
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import java.util.jar.JarFile
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import java.util.zip.ZipEntry
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import java.util.zip.ZipOutputStream
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/**
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* Removes metadata annotations from Kotlin classes
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*/
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fun main(args: Array<String>) {
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if (args.size != 4) {
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error("Usage: kotlinc -script strip-kotlin-annotations.kts <annotation-internal-name-regex> <class-internal-name-regex> <path-to-in-jar> <path-to-out-jar>")
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}
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val annotationRegex = args[0].toRegex()
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val classRegex = args[1].toRegex()
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val inFile = File(args[2])
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val outFile = File(args[3])
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assert(inFile.exists()) { "Input file not found at $inFile" }
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println("Stripping annotations from all classes in $inFile")
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println("Input file size: ${inFile.length()} bytes")
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fun transform(entryName: String, bytes: ByteArray): ByteArray {
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if (!entryName.endsWith(".class")) return bytes
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if (!classRegex.matches(entryName.removeSuffix(".class"))) return bytes
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var changed = false
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val classWriter = ClassWriter(0)
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val classVisitor = object : ClassVisitor(Opcodes.ASM5, classWriter) {
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override fun visitAnnotation(desc: String, visible: Boolean): AnnotationVisitor? {
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if (annotationRegex.matches(Type.getType(desc).getInternalName())) {
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changed = true
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return null
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}
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return super.visitAnnotation(desc, visible)
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}
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}
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ClassReader(bytes).accept(classVisitor, 0)
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if (!changed) return bytes
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return classWriter.toByteArray()
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}
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ZipOutputStream(BufferedOutputStream(FileOutputStream(outFile))).use {
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outJar ->
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val inJar = JarFile(inFile)
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try {
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for (entry in inJar.entries()) {
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val inBytes = inJar.getInputStream(entry).readBytes()
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val outBytes = transform(entry.getName(), inBytes)
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if (inBytes.size < outBytes.size) {
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error("Size increased for ${entry.getName()}: was ${inBytes.size} bytes, became ${outBytes.size} bytes")
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}
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entry.setCompressedSize(-1L)
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outJar.putNextEntry(entry)
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outJar.write(outBytes)
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outJar.closeEntry()
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}
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}
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finally {
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// Yes, JarFile does not extend Closeable on JDK 6 so we can't use "use" here
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inJar.close()
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}
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}
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println("Output written to $outFile")
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println("Output file size: ${outFile.length()} bytes")
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}
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main(args)
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