build: Access version catalog from buildSrc

This change adds a workaround to the build configuration so that we can
access the version catalog from pre-compiled scripts in buildSrc. In
this way, we can use the version catalog everywhere.

This workaround is necessary until
https://github.com/gradle/gradle/issues/15383 is fixed.

1 files changed, 63 insertions, 0 deletions

diff --git a/buildSrc/src/main/kotlin/Libs.kt b/buildSrc/src/main/kotlin/Libs.kt
new file mode 100644
index 00000000..9567845a
--- /dev/null
+++ b/buildSrc/src/main/kotlin/Libs.kt
@@ -0,0 +1,63 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2019 atlarge-research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import org.gradle.api.JavaVersion
+import org.gradle.api.Project
+import org.gradle.api.artifacts.VersionCatalogsExtension
+import org.gradle.kotlin.dsl.getByType
+import kotlin.properties.ReadOnlyProperty
+
+/**
+ * This class makes the version catalog accessible for the build scripts until Gradle adds support for it.
+ *
+ * See https://github.com/gradle/gradle/issues/15383
+ */
+@Suppress("UnstableApiUsage")
+public class Libs(project: Project) {
+    /**
+     * The version catalog of the project.
+     */
+    private val versionCatalog = project.extensions.getByType(VersionCatalogsExtension::class).named("libs")
+
+    /**
+     * A delegate for obtaining configuration values from a [Project] instance.
+     */
+    private fun lib(name: String? = null): ReadOnlyProperty<Libs, String> =
+        ReadOnlyProperty { _, property -> get(name ?: property.name) }
+
+    /**
+     * Obtain the version for the specified [dependency][name].
+     */
+    operator fun get(name: String): String {
+        val dep = versionCatalog.findDependency(name).get().get()
+        return "${dep.module.group}:${dep.module.name}:${dep.versionConstraint.displayName}"
+    }
+
+    companion object {
+        /**
+         * The JVM version to target.
+         */
+        val jvmTarget = JavaVersion.VERSION_1_8
+    }
+}