From 972e1a7f9a674517c914c7fae166b9a41efd8f83 Mon Sep 17 00:00:00 2001
From: Dale Wijnand <dale.wijnand@gmail.com>
Date: Mon, 10 Feb 2020 19:51:35 +0000
Subject: [PATCH] Make signature problems opt-in

Set `ThisBuild / mimaReportSignatureProblems := true` to opt-in.
---
 .../com/typesafe/tools/mima/plugin/MimaKeys.scala     | 11 ++++++-----
 .../com/typesafe/tools/mima/plugin/MimaPlugin.scala   |  9 ++++++++-
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/sbtplugin/src/main/scala/com/typesafe/tools/mima/plugin/MimaKeys.scala b/sbtplugin/src/main/scala/com/typesafe/tools/mima/plugin/MimaKeys.scala
index 07a38fec..d30f77c3 100644
--- a/sbtplugin/src/main/scala/com/typesafe/tools/mima/plugin/MimaKeys.scala
+++ b/sbtplugin/src/main/scala/com/typesafe/tools/mima/plugin/MimaKeys.scala
@@ -8,11 +8,12 @@ object MimaKeys extends MimaKeys
 
 class MimaKeys {
 
-  final val mimaPreviousArtifacts    = settingKey[Set[ModuleID]]("Previous released artifacts used to test binary compatibility.")
-  final val mimaReportBinaryIssues   = taskKey[Unit]("Logs all binary incompatibilities to the sbt console/logs.")
-  final val mimaBinaryIssueFilters   = taskKey[Seq[ProblemFilter]]("Filters to apply to binary issues found. Applies both to backward and forward binary compatibility checking.")
-  final val mimaFailOnProblem        = settingKey[Boolean]("if true, fail the build on binary incompatibility detection.")
-  final val mimaFailOnNoPrevious     = settingKey[Boolean]("if true, fail the build if no previous artifacts are set.")
+  final val mimaPreviousArtifacts       = settingKey[Set[ModuleID]]("Previous released artifacts used to test binary compatibility.")
+  final val mimaReportBinaryIssues      = taskKey[Unit]("Logs all binary incompatibilities to the sbt console/logs.")
+  final val mimaBinaryIssueFilters      = taskKey[Seq[ProblemFilter]]("Filters to apply to binary issues found. Applies both to backward and forward binary compatibility checking.")
+  final val mimaFailOnProblem           = settingKey[Boolean]("if true, fail the build on binary incompatibility detection.")
+  final val mimaFailOnNoPrevious        = settingKey[Boolean]("if true, fail the build if no previous artifacts are set.")
+  final val mimaReportSignatureProblems = settingKey[Boolean]("if true, report `IncompatibleSignatureProblem`s.")
 
   final val mimaPreviousClassfiles   = taskKey[Map[ModuleID, File]]("Directories or jars containing the previous class files used to test compatibility with a given module.")
   final val mimaCurrentClassfiles    = taskKey[File]("Directory or jar containing the current class files used to test compatibility.")
diff --git a/sbtplugin/src/main/scala/com/typesafe/tools/mima/plugin/MimaPlugin.scala b/sbtplugin/src/main/scala/com/typesafe/tools/mima/plugin/MimaPlugin.scala
index aed619e0..05d55b2a 100644
--- a/sbtplugin/src/main/scala/com/typesafe/tools/mima/plugin/MimaPlugin.scala
+++ b/sbtplugin/src/main/scala/com/typesafe/tools/mima/plugin/MimaPlugin.scala
@@ -3,6 +3,7 @@ package plugin
 
 import sbt._
 import sbt.Keys._
+import com.typesafe.tools.mima.core.{ IncompatibleSignatureProblem, ProblemFilters }
 
 /** MiMa's sbt plugin. */
 object MimaPlugin extends AutoPlugin {
@@ -17,6 +18,7 @@ object MimaPlugin extends AutoPlugin {
     mimaBinaryIssueFilters := Nil,
     mimaFailOnProblem := true,
     mimaFailOnNoPrevious := true,
+    mimaReportSignatureProblems := false,
     mimaCheckDirection := "backward",
   )
 
@@ -29,7 +31,7 @@ object MimaPlugin extends AutoPlugin {
           problems._1,
           problems._2,
           mimaFailOnProblem.value,
-          mimaBinaryIssueFilters.value,
+          binaryIssueFilters.value,
           mimaBackwardIssueFilters.value,
           mimaForwardIssueFilters.value,
           log,
@@ -63,6 +65,11 @@ object MimaPlugin extends AutoPlugin {
   /** Setup MiMa with default settings, applicable for most projects. */
   def mimaDefaultSettings: Seq[Setting[_]] = globalSettings ++ buildSettings ++ projectSettings
 
+  private def binaryIssueFilters = Def.task {
+    val noSigs = ProblemFilters.exclude[IncompatibleSignatureProblem]("*")
+    mimaBinaryIssueFilters.value ++ (if (mimaReportSignatureProblems.value) Nil else Seq(noSigs))
+  }
+
   // Allows reuse between mimaFindBinaryIssues and mimaReportBinaryIssues
   // without blowing up the Akka build's heap
   private def binaryIssuesIterator = Def.task {