LivePlugin for navigating to the build.gradle or build.gradle.kts file of the module that hosts the currently open file in editor

plugin.kts

import com.intellij.openapi.project.Project
import com.intellij.openapi.roots.ProjectRootManager
import com.intellij.openapi.vfs.VirtualFile
import com.intellij.psi.search.FilenameIndex
import com.intellij.psi.search.GlobalSearchScope
import liveplugin.registerAction
import liveplugin.show
import liveplugin.virtualFile

registerAction("Find gradle build file", "alt G") { event ->

    val project = event.project
    val virtualFile = event.virtualFile
    if (project == null) {
        show("No project found")
    } else if (virtualFile == null) {
        show("Virtual file not found")
    } else {
        navigateToBuildFile(project, virtualFile)
    }
}

fun navigateToBuildFile(
    project: Project,
    virtualFile: VirtualFile
) {
    val scope = GlobalSearchScope.projectScope(project)

    val fileIndex = ProjectRootManager.getInstance(project).fileIndex

    val moduleName = fileIndex.getModuleForFile(virtualFile)?.moduleFile?.parent?.name

    if (moduleName == null) {
        show("Could not find target module name for file: ${virtualFile.name}")
    } else {
        val buildFiles = FilenameIndex.getFilesByName(project, "build.gradle", scope).toList() +
                FilenameIndex.getFilesByName(project, "build.gradle.kts", scope).toList()

        val buildFile = buildFiles.find {
            it.containingDirectory.name == moduleName
        }

        if (buildFile == null) {
            show("Could not find build file for module: $moduleName")
        } else {
            buildFile.navigate(true)
        }
    }
}