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/*
* Copyright 2020 Google LLC
* Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
*
* 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.ksp.processing.impl
import com.google.devtools.ksp.NoSourceFile
import com.google.devtools.ksp.processing.CodeGenerator
import com.google.devtools.ksp.processing.Dependencies
import com.google.devtools.ksp.symbol.KSClassDeclaration
import com.google.devtools.ksp.symbol.KSFile
import java.io.File
import java.io.FileOutputStream
import java.io.IOException
import java.io.OutputStream
class CodeGeneratorImpl(
private val classDir: File,
private val javaDir: File,
private val kotlinDir: File,
private val resourcesDir: File,
private val projectBase: File,
private val anyChangesWildcard: KSFile,
private val allSources: List<KSFile>,
private val isIncremental: Boolean
) : CodeGenerator {
private val fileMap = mutableMapOf<String, File>()
private val fileOutputStreamMap = mutableMapOf<String, FileOutputStream>()
private val separator = File.separator
val sourceToOutputs: MutableMap<File, MutableSet<File>> = mutableMapOf()
// This function will also clear `fileOutputStreamMap` which will change the result of `generatedFile`
fun closeFiles() {
fileOutputStreamMap.keys.forEach {
fileOutputStreamMap[it]!!.close()
}
fileOutputStreamMap.clear()
}
fun pathOf(packageName: String, fileName: String, extensionName: String): String {
val packageDirs = if (packageName != "") "${packageName.split(".").joinToString(separator)}$separator" else ""
val extension = if (extensionName != "") ".$extensionName" else ""
return "$packageDirs$fileName$extension"
}
override fun createNewFile(
dependencies: Dependencies,
packageName: String,
fileName: String,
extensionName: String
): OutputStream {
return createNewFile(
dependencies,
pathOf(packageName, fileName, extensionName),
extensionToDirectory(extensionName)
)
}
override fun createNewFileByPath(dependencies: Dependencies, path: String, extensionName: String): OutputStream {
val extension = if (extensionName != "") ".$extensionName" else ""
return createNewFile(dependencies, path + extension, extensionToDirectory(extensionName))
}
override fun associate(sources: List<KSFile>, packageName: String, fileName: String, extensionName: String) {
associate(sources, pathOf(packageName, fileName, extensionName), extensionToDirectory(extensionName))
}
override fun associateByPath(sources: List<KSFile>, path: String, extensionName: String) {
val extension = if (extensionName != "") ".$extensionName" else ""
associate(sources, path + extension, extensionToDirectory(extensionName))
}
override fun associateWithClasses(
classes: List<KSClassDeclaration>,
packageName: String,
fileName: String,
extensionName: String
) {
val path = pathOf(packageName, fileName, extensionName)
val files = classes.map {
it.containingFile ?: NoSourceFile(projectBase, it.qualifiedName?.asString().toString())
}
associate(files, path, extensionToDirectory(extensionName))
}
private fun extensionToDirectory(extensionName: String): File {
return when (extensionName) {
"class" -> classDir
"java" -> javaDir
"kt" -> kotlinDir
else -> resourcesDir
}
}
private fun createNewFile(dependencies: Dependencies, path: String, baseDir: File): OutputStream {
val file = File(baseDir, path)
if (!isWithinBaseDir(baseDir, file)) {
throw IllegalStateException("requested path is outside the bounds of the required directory")
}
val absolutePath = file.absolutePath
if (absolutePath in fileMap) {
throw FileAlreadyExistsException(file)
}
val parentFile = file.parentFile
if (!parentFile.exists() && !parentFile.mkdirs()) {
throw IllegalStateException("failed to make parent directories.")
}
file.writeText("")
fileMap[absolutePath] = file
val sources = if (dependencies.isAllSources) {
allSources + anyChangesWildcard
} else {
if (dependencies.aggregating) {
dependencies.originatingFiles + anyChangesWildcard
} else {
dependencies.originatingFiles
}
}
associate(sources, file)
fileOutputStreamMap[absolutePath] = fileMap[absolutePath]!!.outputStream()
return fileOutputStreamMap[absolutePath]!!
}
private fun isWithinBaseDir(baseDir: File, file: File): Boolean {
val base = baseDir.toPath().normalize()
return try {
val relativePath = file.toPath().normalize()
relativePath.startsWith(base)
} catch (e: IOException) {
false
}
}
private fun associate(sources: List<KSFile>, path: String, baseDir: File) {
val file = File(baseDir, path)
if (!isWithinBaseDir(baseDir, file)) {
throw IllegalStateException("requested path is outside the bounds of the required directory")
}
associate(sources, file)
}
private fun associate(sources: List<KSFile>, outputPath: File) {
if (!isIncremental)
return
val output = outputPath.relativeTo(projectBase)
sources.forEach { source ->
sourceToOutputs.getOrPut(File(source.filePath).relativeTo(projectBase)) { mutableSetOf() }.add(output)
}
}
val outputs: Set<File>
get() = fileMap.values.mapTo(mutableSetOf()) { it.relativeTo(projectBase) }
override val generatedFile: Collection<File>
get() = fileOutputStreamMap.keys.map { fileMap[it]!! }
}
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