Remove the use of the old Gradle Plugin (#54)

Author: rachelcarmena

generate-sources/new-plugin/build.gradle

@@ -30,3 +30,11 @@ compileKotlin {
         jvmTarget = "$JVM_TARGET_VERSION"
     }
 }
+
+jar {
+    from(
+        zipTree(sourceSets.main.compileClasspath.find {
+            it.absolutePath.contains(Paths.get("arrow-kt", "arrow-meta").toString())
+        })
+    )
+}

generate-sources/use-plugin/build.gradle

@@ -14,32 +14,19 @@
  * limitations under the License.
  */
 
-buildscript {
-    repositories {
-        maven {
-            url 'https://oss.sonatype.org/content/repositories/snapshots/'
-        }
-    }
-    dependencies {
-        classpath "io.arrow-kt:gradle-plugin:$ARROW_META_VERSION"
-    }
-}
-
 plugins {
     id "org.jetbrains.kotlin.jvm"
 }
 
-apply plugin: "io.arrow-kt.arrow"
-
-arrowMeta.plugins = ["${rootDir}/new-plugin/build/libs/new-plugin.jar".toString()]
-
 dependencies {
     testImplementation "org.junit.jupiter:junit-jupiter:$JUNIT_VERSION"
 }
 
 compileKotlin {
     kotlinOptions {
         jvmTarget = "$JVM_TARGET_VERSION"
+        freeCompilerArgs += ["-Xplugin=${rootDir}/new-plugin/build/libs/new-plugin.jar",
+        "-P", "plugin:arrow.meta.plugin.compiler:generatedSrcOutputDir=${buildDir}"]
     }
 }