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package org.jetbrains.dokka.base.renderers
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.sync.Mutex
import kotlinx.coroutines.sync.withLock
import kotlinx.coroutines.withContext
import org.jetbrains.dokka.plugability.DokkaContext
import java.io.File
import java.io.IOException
import java.net.URI
import java.nio.file.*
class FileWriter(val context: DokkaContext): OutputWriter {
private val createdFiles: MutableSet<String> = mutableSetOf()
private val createdFilesMutex = Mutex()
private val jarUriPrefix = "jar:file:"
private val root = context.configuration.outputDir
override suspend fun write(path: String, text: String, ext: String) {
if (checkFileCreated(path)) return
try {
val dir = Paths.get(root.absolutePath, path.dropLastWhile { it != '/' }).toFile()
withContext(Dispatchers.IO) {
dir.mkdirsOrFail()
Files.write(Paths.get(root.absolutePath, "$path$ext"), text.lines())
}
} catch (e: Throwable) {
context.logger.error("Failed to write $this. ${e.message}")
e.printStackTrace()
}
}
private suspend fun checkFileCreated(path: String): Boolean = createdFilesMutex.withLock {
if (createdFiles.contains(path)) {
context.logger.error("An attempt to write ${root}/$path several times!")
return true
}
createdFiles.add(path)
return false
}
override suspend fun writeResources(pathFrom: String, pathTo: String) =
if (javaClass.getResource(pathFrom)?.toURI()?.toString()?.startsWith(jarUriPrefix) == true) {
copyFromJar(pathFrom, pathTo)
} else {
copyFromDirectory(pathFrom, pathTo)
}
private suspend fun copyFromDirectory(pathFrom: String, pathTo: String) {
val dest = Paths.get(root.path, pathTo).toFile()
val uri = javaClass.getResource(pathFrom)?.toURI()
val file = uri?.let { File(it) } ?: File(pathFrom)
withContext(Dispatchers.IO) {
file.copyRecursively(dest, true)
}
}
private suspend fun copyFromJar(pathFrom: String, pathTo: String) {
val rebase = fun(path: String) =
"$pathTo/${path.removePrefix(pathFrom)}"
val dest = Paths.get(root.path, pathTo).toFile()
if(dest.isDirectory){
dest.mkdirsOrFail()
} else {
dest.parentFile.mkdirsOrFail()
}
val uri = javaClass.getResource(pathFrom).toURI()
val fs = getFileSystemForURI(uri)
val path = fs.getPath(pathFrom)
for (file in Files.walk(path).iterator()) {
if (Files.isDirectory(file)) {
val dirPath = file.toAbsolutePath().toString()
withContext(Dispatchers.IO) {
Paths.get(root.path, rebase(dirPath)).toFile().mkdirsOrFail()
}
} else {
val filePath = file.toAbsolutePath().toString()
withContext(Dispatchers.IO) {
Paths.get(root.path, rebase(filePath)).toFile().writeBytes(
this@FileWriter.javaClass.getResourceAsStream(filePath).use { it?.readBytes() }
?: throw IllegalStateException("Can not get a resource from $filePath")
)
}
}
}
}
private fun File.mkdirsOrFail() {
if (!mkdirs() && !exists()) {
throw IOException("Failed to create directory $this")
}
}
private fun getFileSystemForURI(uri: URI): FileSystem =
try {
FileSystems.newFileSystem(uri, emptyMap<String, Any>())
} catch (e: FileSystemAlreadyExistsException) {
FileSystems.getFileSystem(uri)
}
}
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