kotlinlang #scripting

Can we have a more sophisticated way for kotlin scripting to filter classpath files say by regex instead of the exact jar/file name. Or if full regex is not possible just support for wildcard (

). The issue I’m facing is that in AS, with gradle, I have a service-def (script definitoin) module and a services (actual script files in src folder) module. The services module gets its dependencies via gradle project dependencies (currently

project(":service-def")

project(":service-api")

and

project(":service-dsl")

plus kotlin-stdlib and scripting-jvm dependencies). I also have a service-host module which I use to run the scripting host to debug issues and test out the scripts. I really want to be able to specify only required jars while building the compilation configuration (only the api and dsl jars/classes should be visible within the scripts) but I cannot do this because, when resolved from intelliJ/AS, the classpath contains the actual jars like

service-api-dev.jar

, but when I run the host module java app, the classpath contains folders with

.class

files like

.../api/build/classes/main/

. I think its a Gradle performance feature to avoid building the actual jars in the case of project dependencies. Would be great if I could specify

*api*

and

*dsl*

to filter the classpath as that would cover all the cases. Current workaround is to use

dependenciesFromCurrentContext(wholeClasspath = true)

which works but I dunno if I like. Also, the requirement for the jar version is too strict. As you can see from above my current version is dev because project is still in development. The current classpath filtering tries to strictly match semver like x.y.z and filters out my correct jars. Final question: does scripting add the kotlin stdlib dep automatically? aka if I wanted a really small classpath, can I specify only api and dsl jars w/o explicitly specifying the stdlib and it will work? (My guess is no and we would have to add a kotlin compile config to compile with the stdlib or else specify it) Final question 2: what classpath does the kotlin IJ/AS plugin use to determine dependencies for scripts? Like, if I open a custom script how is IJ/AS able to know the correct types. I know I have to have a jar in the classpath that contains script definition (in my case, I have to make sure to assemble/build the service-def module) but what classpath is IJ/AS checking exactly

tapchicoma

04/01/2019, 6:30 PM

Short update on https://github.com/Tapchicoma/ktsexec-gradle: - finally published to JCenter (should be already available) - added no-op Gradle plugin (~~pending approval~~)

Andrew Gazelka

04/10/2019, 3:19 PM

is there a built-in way for me to have multiple

kts

scripts linked together or would I be better off using

kscript

Andrew Gazelka

04/10/2019, 3:20 PM

additionally, are Kotlin scratches stable enough to be an alternative to Nashorn for the reason of having interpreted code instead of compiled? (for the purpose of hot swapping)

sdeleuze

04/12/2019, 9:42 AM

-.txt

sdeleuze

04/12/2019, 11:08 AM

-.txt

sdeleuze

04/12/2019, 11:10 AM

Is there any workaround for this one? Any chance to release 1.3.31 short term to fix these issues?

altavir

04/13/2019, 9:54 AM

I am trying to migrate beakerx kotlin evaluator to scripting from REPL engine. So I will probably have a lot of questions. First one: is there a way to determine current kotlin compiler version from inside the program?

altavir

04/13/2019, 10:56 AM

Another question: I need the last statement in script to be returned as result. Is it possible to do it?

altavir

04/14/2019, 5:19 PM

I've created a ticket for explicit script dependencies declaration: https://youtrack.jetbrains.com/issue/KT-31021. I do not have a clear idea about such declarations, but I think we really need them, otherwise tooling for script writing seems to be very unstable.

SrSouza

04/19/2019, 4:16 AM

Hi @ilya.chernikov, I try to create a inline class in a script and not work, this is normal or a bug?

Slackbot

04/19/2019, 7:58 PM

This message was deleted.

:google: 2

DALDEI

05/05/2019, 6:32 PM

Copied from #intellij --> I've tried every trick I have found documented and many I have not to get Intellij kotlin "script" to interop properly with Java 1.8. Whether in REPL or in a scratch if its a '.kts' the exact same code that works for .kt files fails with .kts files when I use an inline function that was compiled using jvm 1.8 (as ALL my settings and projects specify). The complaint is the well known "cant use inline bytecode from 1.8 when compiling into 1.6 bytecode pleas use -jvm-target" -- but from inside intellij you cant specify it (I tried -- ,as well as all the settings, facets, hand-editing the .iml files etc no go. Take the exact same .kts file and rename it to ".kt" works fine. Looking in the kotin compiler source doesnt seem to be another global way to fix this -- its got to be passed down through intellij somewhere -- I've put ever variant I can find in my gradle scripts to no affect. My conclusion is that kotlin script compilation doesnt follow the same paths as kotlin compiling. Any suggestions ?

amanda.hinchman-dominguez

05/29/2019, 4:57 AM

Ran into something unfortunate… I’ve transferred my TornadoFX project to use OpenJDK11 and OpenJFX, but upon starting the KotlinCoreEnvironment for PSI parsing, it appears that it is also trying to read the openJDK modules… it seems to care about the JDK modules being used in my project but I’m not sure if it’s trying to read the modules in my VM settings or what

amanda.hinchman-dominguez

05/29/2019, 9:55 PM

Gradle: 4.8
Kotlin: 1.3.21
jonrengleman.shadow: 4.0.2
JDK: ZuluJDK8

Lorin

05/30/2019, 9:25 AM

I might find a bug in kotlin-scripting (v1.3.31). The code is as follows:

@KotlinScript(fileExtension = "simplescript.kts")
abstract class SimpleScript

fun main() {
    val config = createJvmCompilationConfigurationFromTemplate<SimpleScript> {
        jvm {
            dependenciesFromCurrentContext(wholeClasspath = true)
        }
    }

    val s = """
        println("This is a test!")
    """.trimIndent()

    val res = BasicJvmScriptingHost().eval(s.toScriptSource("script-name"), config, null)
    println(res)
}

Running this program, the following error is reported:

Failure(reports=[ScriptDiagnostic(message=Not a script file, severity=ERROR, sourcePath=null, location=null, exception=null)])

But if I remove the argument

"script-name"

from

s.toScriptSource()

. Everything will be fine. Could anyone from JB confirm it? Thanks!

cedric

05/30/2019, 7:20 PM

Any thought why the following cannot resolve the dependency?

// a.kts
@file:org.jetbrains.kotlin.script.util.DependsOn("junit:junit:4.11")
org.junit.Assert.assertTrue(true)

Then:

$ kotlinc -classpath ~/.kobalt/cache/org/jetbrains/kotlin/kotlin-script-util/1.3.31/kotlin-script-util-1.3.31.jar a.kts
a.kts:3:5: error: unresolved reference: junit
org.junit.Assert.assertTrue(true)
    ^
$

ilya.chernikov

05/31/2019, 3:26 PM

@cedric There are several ways to get a scripting engine with customizations (including classpath), depending on your needs. All of them require some coding so far, and there is still almost no documentation, but in fact this is not too difficult. See the thread below for some directions:

SrSouza

06/16/2019, 9:52 PM

Hi @ilya.chernikov, I don't know if here is the right place to ask but, you can tell me if the Kotlin Compiler Plugin has something an intermediate presentation for generate Kotlin code? I'm asking that because I know that if you are making a compiler plugin for JVM target you can use Object ASM to generate bytecode but if in my plugin I want to be multiplatform I will need to write the IR for the LLVM and I have no idea how to do that.

MrPowerGamerBR

06/17/2019, 3:40 PM

In Kotlin 1.3.31, how can I use the script engine? It was working fine in 1.3.21, but after I updated to 1.3.31 the engine says

warning: default scripting plugin is disabled: The provided plugin org.jetbrains.kotlin.scripting.compiler.plugin.ScriptingCompilerConfigurationComponentRegistrar is not compatible with this version of compiler

and trying to execute anything throws an exception.

gianluz

07/06/2019, 8:02 PM

Hi all!! 😄 i'm trying to run a script with dependencies.. here my script:

script.main.kts

@file:Repository("<https://repo1.maven.org/maven2>")
@file:DependsOn("org.apache.commons:commons-text:1.6")

import org.jetbrains.kotlin.script.util.DependsOn
import org.jetbrains.kotlin.script.util.Repository

import org.apache.commons.text.WordUtils

val hello = "helloWorld"
print(hello)
print(WordUtils.capitalize(hello))

$: kotlinc -cp kotlin-main-kts-1.3.41.jar -script script.main.kts

script.main.kts:7:12: error: unresolved reference: apache
import org.apache.commons.text.WordUtils
           ^
script.main.kts:11:7: error: unresolved reference: WordUtils
print(WordUtils.capitalize(hello))
      ^

i do not understand what's wrong here.. 😢

Gary Tierney

07/16/2019, 3:10 AM

What's the current script definition story in IDEA? Last I'd used it, searching IDEA build directories of a projects dependencies would make script template discovery work. Does that work when build tasks are delegated to Gradle?

Nikky

07/25/2019, 7:01 AM

so does

kotlinScriptDef

replace

META-INF/kotlin/script/templates/...

? when using gradle ofc and when i use this, do i change how i set up my folders in idea? currently i mark them as sources root so idea does highlighting

Nikky

07/25/2019, 9:54 AM

also will it be possible to run kotlin scripts with arguments from gradle ? that would make some stuff a lot easier

Gary Tierney

07/25/2019, 9:57 AM

seems like that'd be better placed for *.gradle.kts to handle

Gerard de Leeuw

07/25/2019, 12:58 PM

Anyone else thinks this change is kinda weird? https://github.com/JetBrains/kotlin/commit/67ad3773de2b12f7e1d29e00151b997a4f6373ba#r34443917

jdemeulenaere

07/31/2019, 3:04 PM

I would like to evaluate Kotlin code on the JVM and just get the printed output. What's the easiest way to do it ? I tried playing with

BasicJvmScriptingHost

but I get a lot of weird errors and lost already so much time on this... In the end I just want a function that takes a String input (kotlin code) and outputs the printed output of the evaluated code, i.e:

evaluate("""println("Hello World")""") // returns "Hello World"

Gary Tierney

07/31/2019, 3:18 PM

you can use the

ScriptEvaluator

to get a single return value from a script, but that's a bit different from capturing all printed output

jdemeulenaere

07/31/2019, 3:33 PM

https://pastebin.com/5un4j3NE is what I currently have, and prints:

Executing script...
[ERROR] Not a script file
Executed script

Title

jdemeulenaere

07/31/2019, 3:33 PM

https://pastebin.com/5un4j3NE is what I currently have, and prints:

Executing script...
[ERROR] Not a script file
Executed script

ilya.chernikov

07/31/2019, 4:01 PM

If you setting up an expected filename extension (btw, “script.kt” is not a good extension, you’ll get too many clashes with regular kotlin files), and then create a script from a string, hen you need to specify a correct name (with extension) on

.toScriptSource

call.

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