From 62d1ab0249b3a477f5c6f2d3b7d9e934a17afb94 Mon Sep 17 00:00:00 2001
From: Alexandre Archambault <alexandre.archambault@gmail.com>
Date: Thu, 25 Apr 2019 17:16:49 +0200
Subject: [PATCH] Ensure we don't break binary compatibility in lm-coursier

---
 build.sbt          |  1 +
 project/Mima.scala | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 project/Mima.scala

diff --git a/build.sbt b/build.sbt
index 4ed64a8d7..266635dac 100644
--- a/build.sbt
+++ b/build.sbt
@@ -21,6 +21,7 @@ lazy val `lm-coursier` = project
   .in(file("modules/lm-coursier"))
   .settings(
     shared,
+    Mima.settings,
     libraryDependencies ++= Seq(
       "io.get-coursier" %% "coursier" % coursierVersion0,
       // We depend on librarymanagement-ivy rather than just
diff --git a/project/Mima.scala b/project/Mima.scala
new file mode 100644
index 000000000..bdb5dfb02
--- /dev/null
+++ b/project/Mima.scala
@@ -0,0 +1,33 @@
+
+import com.typesafe.tools.mima.plugin.MimaPlugin
+import sbt._
+import sbt.Keys._
+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", "736d5c11")
+      .!!
+      .linesIterator
+      .map(_.trim)
+      .filter(_.startsWith("v"))
+      .map(_.stripPrefix("v"))
+      .filter(stable)
+      .toSet
+
+  def settings: Seq[Setting[_]] = Seq(
+    MimaPlugin.autoImport.mimaPreviousArtifacts := {
+      binaryCompatibilityVersions.map { ver =>
+        (organization.value % moduleName.value % ver).cross(crossVersion.value)
+      }
+    }
+  )
+
+}