Issues about IDEA support of Kotlin script (.kts)

Support
1

By creating a .kts file and copying the code snippet at https://kotlinlang.org/docs/tutorials/command-line.html#using-the-command-line-to-run-scripts into it, the editor marks “args” as an error but the code can be run correctly.

Did I miss some settings or it’s a small bug of IDEA?

Also, the debug icon is de-activated. Will it be enabled in the future?

Thanks.

This is the version I used:
IntelliJ IDEA 2017.3.3 (Ultimate Edition)
Build #IU-173.4301.25, built on January 16, 2018
JRE: 1.8.0_152-release-1024-b11 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.13.2

2 Likes
2

I’m able to run (though not debug) *.kts files through IntelliJ.

I installed the Kotlin compiler via homebrew. I also had to specify a JDK in the project configuration as one was not configured by default. Here’s the version info:

$ kotlinc -version
info: kotlinc-jvm 1.2.21 (JRE 1.8.0_152-b16)

IntelliJ IDEA 2017.3.4 (Ultimate Edition)
Build #IU-173.4548.28, built on January 29, 2018
JRE: 1.8.0_152-release-1024-b11 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.13.3

Also, the sample code snippet takes a directory as an argument, so you’ll want to provide that as program argument in the run configuration.

3

I experience the same as ckchen with these versions

➜  tmp kotlinc -version
info: kotlinc-jvm 1.2.21 (JRE 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12)

IntelliJ IDEA 2017.3.4 (Ultimate Edition)
Build #IU-173.4548.28, built on January 29, 2018

JRE: 1.8.0_152-release-1024-b11 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Linux 4.13.0-32-generic

The script does run fine, the problem is that IDEA does not validate the code correctly and falsely reports 4 errors in 3 lines of code:

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image826×623 55.9 KB

Is this a configuration problem? Do we miss some settings?

Also, in scripting I want to pass exit codes to the calling shell to indicate success or failure of the script run. I tried to do that with exitProcess (exitProcess - Kotlin Programming Language), but that reults in error: unresolved reference: exitProcess. What is the recommended way to return an exit code from a kotlin script?

Thanks,
Thilo

4

Does System.exit(n) not work?

5

Thanks, @reitzig! Your reply solved both of my problems:

  1. As of this morning I cannot reproduce any more the IDE problem. The errors in IDEA have disappeared magically (on my Linux installation as well as on Windows. :mage:)

  2. yes, System.exit(n) works, as well as exitProcess(n), where now IDEA kindly offers to add

    import kotlin.system.exitProcess
1 Like
6

Sometimes just restarting helps :wink:

7

In my case this appears in the errors too:

Error:(3, 1) Kotlin: Cannot access script base class ‘kotlin.script.templates.standard.ScriptTemplateWithArgs’. Check your module classpath for missing or conflicting dependencies

Running the script from the command line is fine.

Also tried restarting IntelliJ (with invalidate caches)

8

exitProcess is indeed the better choice since it has return type Nothing (instead of void).

9

I was able to fix kts problems in Intellij 2017.3 by moving my kts files into the main directory. That is into a directory that belongs to some module. When they were outside of modules (in root directory), the syntax errors were appearing.