feat: integrate confirmProjectVersionIncremented logic

We don't have a facility to apply the plugin itself without fetching an earlier version.
Includes a script that delegates to the same logic as the task.

build.gradle

@@ -53,3 +53,18 @@ uploadArchives {
 task wrapper(type: Wrapper) {
   gradleVersion = '3.0'
 }
+
+/**
+ * Gradle doesn't have a way for us to apply the local plugin, we'd have to depend on a prior release.
+ * Add a local version of the confirmProjectVersionIncremented task that calls the same logic
+ * as the released task.
+ *
+ * See src/main/groovy/localTaskScript.groovy
+ */
+task confirmProjectVersionIncremented (dependsOn: 'classes', type: JavaExec) {
+  main = 'localTaskScript'
+  classpath = sourceSets.main.runtimeClasspath
+  args project.projectDir.absolutePath
+  args project.version
+}
+

gradle/wrapper/gradle-wrapper.properties

-#Fri Aug 26 09:10:13 CDT 2016
+#Tue Aug 30 12:39:17 CDT 2016
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.0-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.0-all.zip

src/main/groovy/localTaskScript.groovy

+import edu.wisc.doit.gradle.CompareVersions
+import org.ajoberstar.grgit.Grgit
+
+def grgit = Grgit.open(dir: args[0])
+CompareVersions.compare(grgit.describe(), args[1])
+
+