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Ioannis (John) Kostaras has managed to resolve the maven dependencies. However, the plugin contains Kotlin code that needs to be built/migrated to the latest Kotlin compiler version. Anyone fluent in Kotlin is welcome to work with Ioannis to do that.
However, NetBeans 12.x already provides some basic support via java/kotlin.editor module. One can open a .kt file via the Windows→Favourites tab.
It uses Kotlin.tmLanguage.json. This JavaDoc explains how to integrate a TextMate lexer with NetBeans.
| Language Feature Support | Status |
| File type recognition | √ |
| Project type | |
| Semantic syntax highlighting | √ |
| Formatting | √ |
| Braces matching | √ |
| Error Hints/Fixes/Suggestions | |
| Code completion | |
| Code templates | |
| Refactoring | |
| Debugging |