Add 2.13 support (#45)

For the interpolators module

Author: alexarchambault

.travis.sh

@@ -1,12 +1,12 @@
 #!/usr/bin/env bash
-set -ex
+set -exo pipefail
 
 TEST_VERSION="0.1.0-test"
 sbt \
-  test \
+  +test \
   mimaReportBinaryIssues \
   'set version in ThisBuild := "'"$TEST_VERSION"'"' \
-  publishLocal 2>&1 | grep -v 'Maybe this is program'
+  publishLocal 2>&1 | grep -v 'Maybe this is ' | grep -v '^Renamed '
 
 # test that things work from JDK 11
 # not actually building things from it, running into weird proguard issues…

build.sbt

@@ -22,7 +22,7 @@ lazy val finalPackageBin = taskKey[File]("")
 lazy val interface = project
   .enablePlugins(SbtProguard)
   .settings(
-    skip.in(publish) := scalaVersion.value != Settings.scala212,
+    skip.in(publish) := scalaVersion.value != Settings.scala213,
     finalPackageBin := {
       import org.pantsbuild.jarjar._
       import org.pantsbuild.jarjar.util.StandaloneJarProcessor
@@ -90,7 +90,7 @@ lazy val interface = project
     },
 
     Settings.shared,
-    Settings.mima,
+    Settings.mima(),
     libraryDependencies += "io.get-coursier" %% "coursier" % "2.0.0-RC2-6",
 
     libraryDependencies += "com.lihaoyi" %% "utest" % "0.7.1" % Test,
@@ -108,15 +108,23 @@ lazy val interface = project
     mimaPreviousArtifacts := mimaPreviousArtifacts.value.filter(_.revision != "0.0.1"),
 
     // was cross-versioned publishing in 0.0.1
-    mimaPreviousArtifacts += organization.value %% "interface" % "0.0.1",
+    mimaPreviousArtifacts ++= {
+      val sv = scalaVersion.value
+      // TODO When removing 2.12 support in the future, use org % interface_2.12 below?
+      val is212 = sv.startsWith("2.12")
+      if (is212)
+        Set(organization.value %% "interface" % "0.0.1")
+      else
+        Set.empty[ModuleID]
+    },
 
   )
 
 lazy val interpolators = project
   .dependsOn(interface)
   .settings(
     Settings.shared,
-    Settings.mima,
+    Settings.mima(no213 = true),
     libraryDependencies ++= Seq(
       "org.scala-lang" % "scala-reflect" % scalaVersion.value % Provided,
       "com.lihaoyi" %% "utest" % "0.7.1" % Test

interface/src/main/scala/coursier/internal/api/ApiHelper.scala

@@ -232,11 +232,13 @@ object ApiHelper {
       .getDependencies
       .asScala
       .map(dependency)
+      .toVector
 
     val repositories = fetch
       .getRepositories
       .asScala
       .map(repository)
+      .toVector
 
     val cache0 = cache(fetch.getCache)
 
@@ -323,6 +325,7 @@ object ApiHelper {
       .getRepositories
       .asScala
       .map(repository)
+      .toVector
 
     val res = coursier.complete.Complete(cache0)
       .withRepositories(repositories)

project/Settings.scala

@@ -5,23 +5,32 @@ import sbt.Keys._
 
 object Settings {
 
+  def scala213 = "2.13.0"
   def scala212 = "2.12.8"
 
   lazy val shared = Seq(
-    scalaVersion := scala212,
-    crossScalaVersions := Seq(scala212),
+    scalaVersion := scala213,
+    crossScalaVersions := Seq(scala213, scala212),
     scalacOptions += "-target:jvm-1.8",
     javacOptions ++= Seq(
       "-source", "1.8",
       "-target", "1.8"
     )
   )
 
-  lazy val mima = Seq(
+  private val filterOut = Set("0.0.1")
+  private def no213Versions = (0 to 8).map("0.0." + _).toSet
+  def mima(no213: Boolean = false) = Seq(
     MimaPlugin.autoImport.mimaPreviousArtifacts := {
-      Mima.binaryCompatibilityVersions.map { ver =>
-        (organization.value % moduleName.value % ver).cross(crossVersion.value)
-      }
+      val sv = scalaVersion.value
+      val is213 = sv.startsWith("2.13.")
+      Mima.binaryCompatibilityVersions
+        .filter(v => !filterOut(v))
+        .filter(v => !is213 || !no213 || !no213Versions(v))
+        .map { ver =>
+          (organization.value % moduleName.value % ver)
+            .cross(crossVersion.value)
+        }
     }
   )