Enable mima for interpreter-api and jupyter-api

.travis.sh

@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 set -e
 
-sbt ++$TRAVIS_SCALA_VERSION'!' "show version" test
+sbt ++$TRAVIS_SCALA_VERSION'!' "show version" test mimaReportBinaryIssues

build.sbt

@@ -64,7 +64,8 @@ lazy val protocol = project
 lazy val `interpreter-api` = project
   .underShared
   .settings(
-    shared
+    shared,
+    mima
   )
 
 lazy val interpreter = project
@@ -105,6 +106,7 @@ lazy val `jupyter-api` = project
   .dependsOn(`interpreter-api`)
   .settings(
     shared,
+    mima,
     libraryDependencies += Deps.jvmRepr
   )
 

project/Mima.scala

@@ -0,0 +1,23 @@
+
+import sys.process._
+
+object Mima {
+
+  private def stable(ver: String): Boolean =
+    ver.exists(c => c != '0' && c != '.') &&
+    ver
+      .replace("-RC", "-")
+      .forall(c => c == '.' || c == '-' || c.isDigit)
+
+  def binaryCompatibilityVersions: Set[String] =
+    Seq("git", "tag", "--merged", "HEAD^", "--contains", "v0.3.1")
+      .!!
+      .linesIterator
+      .map(_.trim)
+      .filter(_.startsWith("v"))
+      .map(_.stripPrefix("v"))
+      .filter(_ != "0.3.1") // Mima enabled right after it
+      .filter(stable)
+      .toSet
+
+}

project/Settings.scala

@@ -2,6 +2,7 @@
 import java.nio.charset.StandardCharsets.UTF_8
 import java.nio.file.Files
 
+import com.typesafe.tools.mima.plugin.MimaPlugin
 import sbt._
 import sbt.Keys._
 
@@ -155,4 +156,12 @@ object Settings {
     }
   }
 
+  lazy val mima = Seq(
+    MimaPlugin.autoImport.mimaPreviousArtifacts := {
+      Mima.binaryCompatibilityVersions.map { ver =>
+        (organization.value % moduleName.value % ver).cross(crossVersion.value)
+      }
+    }
+  )
+
 }

project/plugins.sbt

@@ -1,3 +1,4 @@
 addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.2.2")
+addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "0.3.0")
 addSbtPlugin("org.xerial.sbt" % "sbt-pack" % "0.11")
 addSbtCoursier