IntelliJ has a feature to convert Java to Kotlin. ...
# intellijm
Marcello Galhardo
06/07/2023, 5:53 PMIntelliJ has a feature to convert Java to Kotlin. Out of curiosity: can that be run as a standalone tool? If yes, is there any doc? Thank you.
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ephemient
06/07/2023, 5:56 PMit's https://github.com/JetBrains/intellij-community/tree/master/plugins/kotlin/j2k and there isn't a supported way to run it outside of the IDE
ephemient
06/07/2023, 5:58 PMI suppose you could poke around in the binary artifact https://maven.pkg.jetbrains.space/kotlin/p/kotlin/kotlin-ide/org/jetbrains/kotlin/j2k-new/ and see if there a way to set up enough of the environment outside the IDE to get it to work
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Adam S
06/07/2023, 6:24 PMAdam S
06/07/2023, 6:25 PMsomeone made a hack, but it’s not been updated since 2021 https://github.com/ermattt/clij2k
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ephemient
06/07/2023, 6:27 PMnot really sure what that particular repo helps with since you need to set up the IDE anyway to get it to work… but the approach of driving a headless IDE seems feasible
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hfhbd
06/07/2023, 9:32 PMI did not look at the repo but running headless IntelliJ is basically what the Kotlin compiler as well as sqldelight do.
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ephemient
06/07/2023, 9:42 PMno, not really. they use data structures like PSI, which is a tiny subset of the IDE. but that repo literally installs an IntelliJ plugin and uses the IntelliJ intallation itself
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hfhbd
06/07/2023, 9:59 PMI wouldn’t say tiny, the parser, project, modules, extension points and vFiles are the basic components of IntelliJ, but really running a headless instance is another thing. But it should be possible to extract the j2k plugin components and register them in a basic IntelliJ core environment.
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ephemient
06/07/2023, 10:02 PMyeah you'd have to set up the environment to look like a project… which is what I was getting at earlier 😛
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hfhbd
06/07/2023, 10:14 PMYeah, but this is easy, this is basically all you need plus registering the components: https://github.com/AlecStrong/sql-psi/blob/master/core/src/main/kotlin/com/alecstrong/sql/psi/core/SqlCoreEnvironment.kt
Just ignore the name, the implementation is universal and could be further simplified.
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Chetan Sachdeva
06/30/2023, 2:32 PMWas anyone able to do J2K conversion through CLI? I tried running it as part of the inspection using https://github.com/ermattt/clij2k but it didn’t quite work.
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hfhbd
06/30/2023, 2:39 PMI created the implementation, but it is still work in progress, mostly due to shaded IntelliJ dependencies: https://github.com/hfhbd/j2k
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Chetan Sachdeva
06/30/2023, 3:53 PM50 shades of IntelliJ 😄
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