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path: root/core/src/main/kotlin/DokkaGenerator.kt
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package org.jetbrains.dokka

import org.jetbrains.dokka.Model.Module
import org.jetbrains.dokka.Utilities.pretty
import org.jetbrains.dokka.links.DRI
import org.jetbrains.dokka.renderers.FileWriter
import org.jetbrains.dokka.renderers.HtmlRenderer
import org.jetbrains.dokka.resolvers.DefaultLocationProvider
import org.jetbrains.dokka.transformers.DefaultDocumentationToPageTransformer
import org.jetbrains.kotlin.cli.common.messages.CompilerMessageLocation
import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
import org.jetbrains.kotlin.cli.common.messages.MessageCollector
import org.jetbrains.kotlin.cli.common.messages.MessageRenderer
import org.jetbrains.kotlin.utils.PathUtil
import java.io.File

class DokkaGenerator(
    private val configuration: DokkaConfiguration,
    private val logger: DokkaLogger
) {
    fun generate(): Unit {
        configuration.passesConfigurations.map { pass ->
            AnalysisEnvironment(DokkaMessageCollector(logger), pass.analysisPlatform).run {
                if (analysisPlatform == Platform.jvm) {
                    addClasspath(PathUtil.getJdkClassesRootsFromCurrentJre())
                }
                for (element in pass.classpath) {
                    addClasspath(File(element))
                }

                addSources(pass.sourceRoots.map { it.path })

                loadLanguageVersionSettings(pass.languageVersion, pass.apiVersion)

                val environment = createCoreEnvironment()
                val (facade, _) = createResolutionFacade(environment)

                environment.getSourceFiles().asSequence()
                    .map { it.packageFqName }
                    .distinct()
                    .mapNotNull { facade.resolveSession.getPackageFragment(it) }
                    .map { DokkaDescriptorVisitor.visitPackageFragmentDescriptor(it, DRI.topLevel) }
                    .toList()
                    .let { Pair(pass, Module(it)) }
            }.also { println("${pass.analysisPlatform}:\n${it.second.pretty()}\n\n") }
        }.let {
            DefaultDocumentationToPageTransformer().transform(it)
        }.also {
            HtmlRenderer(
                FileWriter(configuration.outputDir, ""),
                DefaultLocationProvider(it, configuration, ".${configuration.format}")
            ).render(it)
        }
    }
}
private class DokkaMessageCollector(private val logger: DokkaLogger) : MessageCollector {
    override fun clear() {
        seenErrors = false
    }

    private var seenErrors = false

    override fun report(severity: CompilerMessageSeverity, message: String, location: CompilerMessageLocation?) {
        if (severity == CompilerMessageSeverity.ERROR) {
            seenErrors = true
        }
        logger.error(MessageRenderer.PLAIN_FULL_PATHS.render(severity, message, location))
    }

    override fun hasErrors() = seenErrors
}