build: add buildSrc/, QuasarPlugin

buildSrc/src/main/groovy/QuasarPlugin.groovy

@@ -0,0 +1,57 @@
+import org.gradle.api.*
+import org.gradle.api.tasks.testing.Test
+import org.gradle.api.tasks.JavaExec
+
+/**
+ * QuasarPlugin creates a "quasar" configuration, adds quasar as a dependency and creates a "quasarScan" task that scans
+ * for `@Suspendable`s in the code
+ */
+class QuasarPlugin implements Plugin<Project> {
+    void apply(Project project) {
+
+        project.repositories {
+            mavenCentral()
+        }
+
+        project.configurations.getByName("default")
+        project.configurations.create("quasar")
+        project.dependencies.add("quasar", "co.paralleluniverse:quasar-core:${project.rootProject.ext.quasar_version}:jdk8@jar")
+        project.dependencies.add("compile", "co.paralleluniverse:quasar-core:${project.rootProject.ext.quasar_version}:jdk8")
+
+
+        project.tasks.withType(Test) {
+            jvmArgs "-javaagent:${project.configurations.quasar.singleFile}"
+            jvmArgs "-Dco.paralleluniverse.fibers.verifyInstrumentation"
+        }
+        project.tasks.withType(JavaExec) {
+            jvmArgs "-javaagent:${project.configurations.quasar.singleFile}"
+            jvmArgs "-Dco.paralleluniverse.fibers.verifyInstrumentation"
+        }
+
+        project.task("quasarScan") {
+            inputs.files(project.sourceSets.main.output)
+            outputs.files(
+                    "$project.sourceSets.main.output.resourcesDir/META-INF/suspendables",
+                    "$project.sourceSets.main.output.resourcesDir/META-INF/suspendable-supers"
+            )
+        } << {
+
+            // These lines tell gradle to run the Quasar suspendables scanner to look for unannotated super methods
+            // that have @Suspendable sub implementations.  These tend to cause NPEs and are not caught by the verifier
+            // NOTE: need to make sure the output isn't on the classpath or every other run it generates empty results, so
+            // we explicitly delete to avoid that happening.  We also need to turn off what seems to be a spurious warning in the IDE
+            ant.taskdef(name:'scanSuspendables', classname:'co.paralleluniverse.fibers.instrument.SuspendablesScanner',
+                    classpath: "${project.sourceSets.main.output.classesDir}:${project.sourceSets.main.output.resourcesDir}:${project.configurations.runtime.asPath}")
+            project.delete "$project.sourceSets.main.output.resourcesDir/META-INF/suspendables", "$project.sourceSets.main.output.resourcesDir/META-INF/suspendable-supers"
+            ant.scanSuspendables(
+                    auto:false,
+                    suspendablesFile: "$project.sourceSets.main.output.resourcesDir/META-INF/suspendables",
+                    supersFile: "$project.sourceSets.main.output.resourcesDir/META-INF/suspendable-supers") {
+                fileset(dir: project.sourceSets.main.output.classesDir)
+            }
+
+        }
+
+        project.jar.dependsOn project.quasarScan
+    }
+}