Kotlin JSR-223 ScriptEngineFactory里面的胖罐子 - 找不到kotlin编译jar

Question

我有一个肥胖的罐子,我正试图得到Kotlin的实例ScriptEngine.

出于调试目的,我正在迭代可用的脚本引擎工厂并获取引擎.

val scriptEngineManager = ScriptEngineManager()
for (factory in scriptEngineManager.engineFactories) {
    val scriptEngine = factory.scriptEngine
}

当它击中Kotlin的引擎时,它失败并出现以下异常:

Exception in thread "main" java.io.FileNotFoundException: Cannot find kotlin compiler jar, set kotlin.compiler.jar property to proper location
        at org.jetbrains.kotlin.script.jsr223.KotlinJsr223ScriptEngineFactoryExamplesKt$kotlinCompilerJar$2.invoke(KotlinJsr223ScriptEngineFactoryExamples.kt:100)
        at org.jetbrains.kotlin.script.jsr223.KotlinJsr223ScriptEngineFactoryExamplesKt$kotlinCompilerJar$2.invoke(KotlinJsr223ScriptEngineFactoryExamples.kt)
        at kotlin.SynchronizedLazyImpl.getValue(Lazy.kt:130)
        at org.jetbrains.kotlin.script.jsr223.KotlinJsr223ScriptEngineFactoryExamplesKt.getKotlinCompilerJar(KotlinJsr223ScriptEngineFactoryExamples.kt)
        at org.jetbrains.kotlin.script.jsr223.KotlinJsr223ScriptEngineFactoryExamplesKt.access$getKotlinCompilerJar$p(KotlinJsr223ScriptEngineFactoryExamples.kt:1)
        at org.jetbrains.kotlin.script.jsr223.KotlinJsr223JvmDaemonLocalEvalScriptEngineFactory.getScriptEngine(KotlinJsr223ScriptEngineFactoryExamples.kt:56)
        at davidsiro.invoices.InvoiceGeneratorKt.generateInvoice(invoiceGenerator.kt:16)
        at davidsiro.invoices.MainKt.main(main.kt:11)

我的胖jar包含所有依赖项(虽然解压缩),包括Kotlin Compiler.我正在使用Maven Assembly Plugin来构建它,它配置如下:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>2.6</version>
    <executions>
        <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
                <goal>single</goal>
            </goals>
            <configuration>
                <archive>
                    <manifest>
                        <mainClass>${main.class}</mainClass>
                    </manifest>
                </archive>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
        </execution>
    </executions>
</plugin>

有任何想法吗？

更新

为了记录,我尝试了KotlinJsr223JvmLocalScriptEngineFactory和KotlinJsr223JvmDaemonLocalEvalScriptEngineFactory,结果相同.

Answer 1

kotlin-script-util中的JSR223工厂正在尝试查找编译器jar以便设置编译.在您的情况下,您需要编写自己的工厂以明确提供脚本编译类路径,例如

class MyScriptEngineFactory : KotlinJsr223JvmScriptEngineFactoryBase() {   
    override fun getScriptEngine(): ScriptEngine =
        KotlinJsr223JvmLocalScriptEngine(
            Disposer.newDisposable(),
            this,
            classpath, // !!! supply the script classpath here
            KotlinStandardJsr223ScriptTemplate::class.qualifiedName!!,
            { ctx, types -> ScriptArgsWithTypes(arrayOf(ctx.getBindings(ScriptContext.ENGINE_SCOPE)), types ?: emptyArray()) },
            arrayOf(Bindings::class)
        )
}

您需要将以下罐子放入classpath:

• kotlin-script-util.jar - 它包含用作脚本超类的模板类
• kotlin-script-runtime.jar - 用于脚本编写的基类
• 您可能需要在脚本中使用的任何其他罐子 - 很可能 - kotlin-stdlib.jar

您可以将胖罐放在那里,但这意味着可以从脚本中访问它的所有内容.不是在谈论编译器的开销.