org.jetbrains.kotlinx.jupyter.libraries.StandardResolutionInfoProvider.kt Maven / Gradle / Ivy

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Implementation of REPL compiler and preprocessor for Jupyter dialect of Kotlin (IDE-compatible)

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package org.jetbrains.kotlinx.jupyter.libraries

import org.jetbrains.kotlinx.jupyter.api.libraries.LibraryResolutionInfo
import org.jetbrains.kotlinx.jupyter.common.getHttp
import org.jetbrains.kotlinx.jupyter.common.successful
import org.jetbrains.kotlinx.jupyter.config.logger
import java.io.File
import java.net.URL

class StandardResolutionInfoProvider(override var fallback: LibraryResolutionInfo) : ResolutionInfoProvider {
    override fun get(string: String): LibraryResolutionInfo {
        if (string.isEmpty()) return fallback
        return tryGetAsRef(string) ?: tryGetAsDir(string) ?: tryGetAsFile(string) ?: tryGetAsURL(string) ?: fallback
    }

    private fun tryGetAsRef(ref: String): LibraryResolutionInfo? {
        return if (KERNEL_LIBRARIES.checkRefExistence(ref)) AbstractLibraryResolutionInfo.getInfoByRef(ref) else null
    }

    private fun tryGetAsDir(dirName: String): LibraryResolutionInfo? {
        val file = File(dirName)
        return if (file.isDirectory) AbstractLibraryResolutionInfo.ByDir(file) else null
    }

    private fun tryGetAsFile(fileName: String): LibraryResolutionInfo? {
        val file = File(fileName)
        return if (file.isFile) AbstractLibraryResolutionInfo.ByFile(file) else null
    }

    private fun tryGetAsURL(url: String): LibraryResolutionInfo? {
        val response = try {
            getHttp(url)
        } catch (e: Throwable) {
            LOG.warn("Unable to load library by URL $url", e)
            return null
        }
        return if (response.status.successful) AbstractLibraryResolutionInfo.ByURL(URL(url)) else null
    }

    companion object {
        val LOG = logger()
    }
}