From 66b8863d799607e2535cbc7d9757f3b206e01b8f Mon Sep 17 00:00:00 2001
From: Dale Wijnand <dale.wijnand@gmail.com>
Date: Thu, 20 Jul 2017 17:13:35 +0100
Subject: [PATCH] Add, configure & enable MiMa

---
 .travis.yml         | 4 ++--
 build.sbt           | 8 +++++++-
 project/plugins.sbt | 1 +
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 7b9d62d48..2a123e73c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,8 +7,8 @@ scala:
 
 script:
 # drop scalafmt on the 1.0.0 branch to dogfood 1.0.0-RC2 before there is a sbt 1.0 of new-sbt-scalafnt
-# - sbt -Dfile.encoding=UTF8 -J-XX:ReservedCodeCacheSize=256M ";++$TRAVIS_SCALA_VERSION test;scalafmt::test;test:scalafmt::test"
-  - sbt -Dfile.encoding=UTF8 -J-XX:ReservedCodeCacheSize=256M ";++$TRAVIS_SCALA_VERSION test"
+# - sbt -Dfile.encoding=UTF8 -J-XX:ReservedCodeCacheSize=256M ";++$TRAVIS_SCALA_VERSION;mimaReportBinaryIssues;test;scalafmt::test;test:scalafmt::test"
+  - sbt -Dfile.encoding=UTF8 -J-XX:ReservedCodeCacheSize=256M ";++$TRAVIS_SCALA_VERSION;mimaReportBinaryIssues;test"
 
 cache:
   directories:
diff --git a/build.sbt b/build.sbt
index e249b949f..326830172 100644
--- a/build.sbt
+++ b/build.sbt
@@ -30,6 +30,10 @@ def commonSettings: Seq[Setting[_]] = Seq(
   parallelExecution in Test := false
 )
 
+val mimaSettings = Def settings (
+  mimaPreviousArtifacts := Set(organization.value %% moduleName.value % "1.0.0-X18")
+)
+
 lazy val lmRoot = (project in file("."))
   .aggregate(lmCore, lmIvy)
   .settings(
@@ -91,7 +95,8 @@ lazy val lmCore = (project in file("core"))
       val sdirs = (managedSourceDirectories in Compile).value
       val base = baseDirectory.value
       (((srcs --- sdirs --- base) pair (relativeTo(sdirs) | relativeTo(base) | flat)) toSeq)
-    }
+    },
+    mimaSettings,
   )
   .configure(addSbtIO, addSbtUtilLogging, addSbtUtilPosition, addSbtUtilCache)
 
@@ -107,6 +112,7 @@ lazy val lmIvy = (project in file("ivy"))
     sourceManaged in (Compile, generateContrabands) := baseDirectory.value / "src" / "main" / "contraband-scala",
     contrabandFormatsForType in generateContrabands in Compile := DatatypeConfig.getFormats,
     scalacOptions in (Compile, console) --= Vector("-Ywarn-unused-import", "-Ywarn-unused", "-Xlint"),
+    mimaSettings,
   )
 
 def customCommands: Seq[Setting[_]] = Seq(
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 3023a6dc1..86d334893 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -2,5 +2,6 @@ addSbtPlugin("org.scala-sbt" % "sbt-houserules" % "0.3.3")
 addSbtPlugin("org.scala-sbt" % "sbt-contraband" % "0.3.0-M9")
 
 // addSbtPlugin("com.lucidchart" % "sbt-scalafmt" % "1.3")
+addSbtPlugin("com.typesafe"  % "sbt-mima-plugin" % "0.1.14")
 
 scalacOptions += "-language:postfixOps"