Added PsiElement detection

Author: Mr3zee

compiler-plugin/compiler-plugin-backend/build.gradle.kts

@@ -7,6 +7,7 @@ import org.jetbrains.kotlin.gradle.dsl.ExplicitApiMode
 plugins {
     alias(libs.plugins.conventions.jvm)
     alias(libs.plugins.compiler.specific.module)
+    alias(libs.plugins.conventions.no.psi.element)
 }
 
 kotlin {

compiler-plugin/compiler-plugin-cli/build.gradle.kts

@@ -7,6 +7,7 @@ import org.jetbrains.kotlin.gradle.dsl.ExplicitApiMode
 plugins {
     alias(libs.plugins.conventions.jvm)
     alias(libs.plugins.compiler.specific.module)
+    alias(libs.plugins.conventions.no.psi.element)
 }
 
 kotlin {

compiler-plugin/compiler-plugin-common/build.gradle.kts

@@ -7,6 +7,7 @@ import org.jetbrains.kotlin.gradle.dsl.ExplicitApiMode
 plugins {
     alias(libs.plugins.conventions.jvm)
     alias(libs.plugins.compiler.specific.module)
+    alias(libs.plugins.conventions.no.psi.element)
 }
 
 kotlin {

compiler-plugin/compiler-plugin-k2/build.gradle.kts

@@ -10,6 +10,7 @@ import util.whenKotlinCompilerIsAtLeast
 plugins {
     alias(libs.plugins.conventions.jvm)
     alias(libs.plugins.compiler.specific.module)
+    alias(libs.plugins.conventions.no.psi.element)
 }
 
 tasks.jar {

gradle-conventions/src/main/kotlin/conventions-no-psi-element.gradle.kts

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2023-2025 JetBrains s.r.o and contributors. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+import kotlin.io.path.readLines
+
+gradle.afterProject {
+    layout.projectDirectory.dir("src").asFileTree.visit {
+        if (isDirectory) return@visit
+        if (file.name.endsWith(".kt")) {
+            file.toPath().readLines().forEach { line ->
+                if (!line.trim().startsWith("//") && line.contains("PsiElement")) {
+                    throw GradleException(
+                        "Kotlin source file $file must not contain `PsiElement` reference " +
+                                "in the compiler plugin. Use KtElement instead."
+                    )
+                }
+            }
+        }
+    }
+}

versions-root/libs.versions.toml

@@ -159,6 +159,7 @@ conventions-npm = { id = "conventions-npm" }
 conventions-root = { id = "conventions-root" }
 conventions-dokka-spec = { id = "conventions-dokka-spec" }
 conventions-dokka-public = { id = "conventions-dokka-public" }
+conventions-no-psi-element = { id = "conventions-no-psi-element" }
 compiler-specific-module = { id = "compiler-specific-module" }
 
 # gradle-plugin project