Update plugin to support 2026.1 releases

[idexter]

Description

Update plugin to work with 2026.* versions of IDE.

Tested on Goland 2026.1.2

Tested using environment:

$ uname -a
Darwin dextermac.local 24.6.0 Darwin Kernel Version 24.6.0: Mon Jan 19 22:00:10 PST 2026; root:xnu-11417.140.69.708.3~1/RELEASE_X86_64 x86_64

$ opa version

Version: 1.16.2
Build Commit:
Build Timestamp:
Build Hostname:
Go Version: go1.26.3
Platform: darwin/amd64
Rego Version: v1
WebAssembly: unavailable

$ regal version

Version:       0.40.0
Go Version:    go1.26.2
OPA Version:   1.15.2
Platform:      darwin/amd64
Commit:        Homebrew
Timestamp:     2026-04-21T13:07:38Z
Installed via: Homebrew

Fixes #196

[charlieegan3]

Hey, are you still having issues on the 0.17.0 release with this goland version?

[idexter]

Hey, are you still having issues on the 0.17.0 release with this goland version?

Sure, 0.17.0 is not compatible with 2026.* branch...

Due to Compatibility docs it should be built with 261 tree like here in this PR

[charlieegan3]

I see, looking at the previous times we've update this we also need to do update:

• Kotlin JVM plugin
• IntelliJ platform plugin
• psiViewerPlugin

Are you able to get the plugin running with this version with ./gradlew :plugin:runIde?

[idexter]

Are you able to get the plugin running with this version with ./gradlew :plugin:runIde?

If I don't change anything it builds and runs sucessfully. But with IDEA 2025.3.1

• When I change platformVersion=2026.1.2 in gradle.properties it doesn't build and ask for update Kotlin at least to 2.3.0.
• Using Kotlin 2.3.0 it fail to compile with some errors:

> Task :compileKotlin FAILED
e: file:///home/open-policy-agent/opa-idea-plugin/src/main/kotlin/org/openpolicyagent/ideaplugin/ide/actions/utils.kt:52:27 Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type 'PsiFile?'.
e: file:///home/open-policy-agent/opa-idea-plugin/src/main/kotlin/org/openpolicyagent/ideaplugin/ide/actions/utils.kt:68:27 Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type 'PsiFile?'.

😢

[idexter]

I've try to change Kotlin version and plantformVersion and fix suggestions. Now it works using ./gradlew :plugin:runIde

[charlieegan3]

Hey, thanks for your work on this. I am just trying to make sure I can test locally the same and then we can get this in.

[charlieegan3]

I've been able to test this locally, let's see if we can get the tests running here and then we can merge.

[charlieegan3]

I had a number of issues and deprecations in the tests, see 2f4007d. But I think we should be good now!

[charlieegan3]

Thanks for the work on this, I'll try and get a release out shortly.