LifePlugin can't find PsiClass

[yanalexn]

Hi, Dmitry!

Just started writing a simple plugin using your LivePlugin. Hot reload is really the killer feature!

Unforturnately, LivePlugin's bundled jars do not contain com.intellij.psi.PsiClass and some other psi classes (e.g. PsiJavaFile) from the standard Intellij Platform SDK. My goal is to find all private final fields in a current java class and perform some boiler-plate editing. Since I'm new to plugin development, it's not clear for me how to extract all those fields without psi classes and also it's not clear whether those classes should or should not be included in LivePlugin by default. Interstingly, I've noticed that some psi classes, that are inaccessible for me, are included in these LivePlugin examples: https://gist.github.com/dkandalov/5992191, https://gist.github.com/dkandalov/5979943, which makes me wonder if everything's correct with my setup

If it's necessary, I use: Ultimate Intellij IDEA 2024.3.1 on Windows 10

[stesie]

@yanalexn I recently started playing around with LivePlugin as well (and also noticed the behaviour you outline).

Two things so, have you tried running the script anyways? For me the class indeed is available at runtime, it's just the code editor that's not showing it.

Speaking of which, you can easily add it there too. And to be clear, both PsiClass and PsiJavaFile are (technically) not part of the IntelliJ Platform. Instead both are part of the Java Plugin. Both are declared in java-impl.jar file, for me it's located below my home directory at .local/share/JetBrains/Toolbox/apps/intellij-idea-ultimate/plugins/java/lib/java-impl.jar. If you right-click the “LivePlugin and IDE jars (to enable navigation and auto-complete)”, entry, modify the library, edit and add the jar file ... then the editor should also support auto completion on PsiClass

[dkandalov]

Hi @yanalexn!

Apologies for the slow response.
TLDR you can add // depends-on-plugin com.intellij.java after imports to make it work.

As @stesie mentioned, PsiClass is part of the Java plugin now so it needs to be explicitly added to LivePlugin dependencies with the depends-on-plugin comment. Where com.intellij.java is the Java plugin id that can be found here https://plugins.jetbrains.com/plugin/27368-java. For many years Java classes used to be part of IntelliJ API (or at least they were accessible without any additional effort). This is why the gists you found worked at the time (it was 2013).

I noticed that even with depends-on-plugin there is no proper highlighting for Kotlin files though :( This is something I need to fix (I blame kotlin scripting apis 🙈)