1 files changed, 31 insertions, 0 deletions
diff --git a/src/main/scala/xyz.driver.sbt/FatalWarnings.scala b/src/main/scala/xyz.driver.sbt/FatalWarnings.scala
new file mode 100644
index 0000000..b7fc585
--- /dev/null
+++ b/src/main/scala/xyz.driver.sbt/FatalWarnings.scala
@@ -0,0 +1,31 @@
+package xyz.driver.sbt
+
+import sbt.{Def, _}
+import sbt.Keys._
+import xsbti.compile.CompileAnalysis
+
+import scala.collection.JavaConverters._
+
+object FatalWarnings extends AutoPlugin {
+
+  override def requires = plugins.JvmPlugin
+  override def trigger  = allRequirements
+
+  override def projectSettings: Seq[Def.Setting[_]] = Seq(
+    compile in Compile := {
+      val compiled: CompileAnalysis = (compile in Compile).value
+      val problems = compiled.readSourceInfos().getAllSourceInfos.asScala.flatMap {
+        case (_, info) =>
+          info.getReportedProblems
+      }
+
+      val deprecationsOnly = problems.forall { problem =>
+        problem.message().contains("is deprecated")
+      }
+
+      if (!deprecationsOnly) sys.error("Fatal warnings: some warnings other than deprecations were found.")
+      compiled
+    }
+  )
+
+}