Open build.gradle.kts IntelliJ IDEA action (Live Plugin)

plugin.kts

// https://gist.github.com/maio/70353d23877ccc3e6c54e86f042fd891

import com.intellij.openapi.actionSystem.AnAction
import com.intellij.openapi.actionSystem.AnActionEvent
import com.intellij.openapi.actionSystem.CommonDataKeys
import com.intellij.openapi.fileEditor.FileEditorManager
import com.intellij.openapi.vfs.VirtualFile
import liveplugin.PluginUtil.registerAction
import liveplugin.PluginUtil.show

class OpenBuildGradleKtsAction : AnAction() {
    override fun actionPerformed(event: AnActionEvent) {
        val project = event.getData(CommonDataKeys.PROJECT)
        val currentFile = event.getData(CommonDataKeys.VIRTUAL_FILE)

        if (project == null || currentFile == null) {
            show("No file or project is currently open.")
            return
        }

        val buildFile = findBuildGradleKts(currentFile)
        if (buildFile == null) {
            show("No build.gradle.kts found")
            return
        }

        FileEditorManager.getInstance(project).openFile(buildFile, true)
    }

    private fun findBuildGradleKts(file: VirtualFile): VirtualFile? {
        var currentDir = if (file.isDirectory) file else file.parent
        while (currentDir != null) {
            val buildFile = currentDir.findChild("build.gradle.kts")?.takeIf { it.exists() }
            if (buildFile != null) {
                return buildFile
            }
            currentDir = currentDir.parent
        }
        return null
    }
}

registerAction("OpenBuildGradleKts", OpenBuildGradleKtsAction())

Use with https://plugins.jetbrains.com/plugin/7282-liveplugin