build(Gradle): Apply a work-around for precompiled plugin scripts

Allow precompiled plugin scripts to access the version catalog, see [1].

[1]: gradle/gradle#15383

Signed-off-by: Sebastian Schuberth <[email protected]>

buildSrc/build.gradle.kts

@@ -17,6 +17,11 @@
  * License-Filename: LICENSE
  */
 
+import org.gradle.accessors.dm.LibrariesForLibs
+
+private val Project.libs: LibrariesForLibs
+    get() = extensions.getByType()
+
 plugins {
     // Use Kotlin DSL to write precompiled script plugins.
     `kotlin-dsl`
@@ -26,3 +31,7 @@ repositories {
     // Allow to resolve external plugins from precompiled script plugins.
     gradlePluginPortal()
 }
+
+dependencies {
+    implementation(files(libs.javaClass.superclass.protectionDomain.codeSource.location))
+}

buildSrc/settings.gradle.kts

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2023 The ORT Project Authors (see <https://github.com/oss-review-toolkit/ort/blob/main/NOTICE>)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * License-Filename: LICENSE
+ */
+
+dependencyResolutionManagement {
+    versionCatalogs {
+        create("libs") {
+            from(files("../gradle/libs.versions.toml"))
+        }
+    }
+}