remove coupling to sbt-projectmatrix

See scalacenter/scalafix.g8#19

project/plugins.sbt

@@ -1,6 +1,5 @@
 resolvers += Resolver.sonatypeRepo("public")
 addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.5.7")
-addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.10.0")
 
 libraryDependencies += "org.scala-sbt" %% "scripted-plugin" % sbtVersion.value
 unmanagedSourceDirectories.in(Compile) ++= {

src/main/scala-sbt-1.0/scalafix/sbt/ScalafixTestkitPlugin.scala

@@ -2,9 +2,7 @@ package scalafix.sbt
 
 import sbt.Keys._
 import sbt._
-import sbt.internal.ProjectMatrix
 import sbt.plugins.JvmPlugin
-import sbtprojectmatrix.ProjectMatrixPlugin.autoImport._
 
 import java.io.File.pathSeparator
 
@@ -13,43 +11,6 @@ object ScalafixTestkitPlugin extends AutoPlugin {
   override def requires: Plugins = JvmPlugin
 
   object autoImport {
-    case class TestkitTargetAxis(scalaVersion: String)
-        extends VirtualAxis.WeakAxis {
-      private val scalaBinaryVersion =
-        CrossVersion.binaryScalaVersion(scalaVersion)
-
-      override val idSuffix = s"Target${scalaBinaryVersion.replace('.', '_')}"
-      override val directorySuffix = s"target$scalaBinaryVersion"
-    }
-
-    object TestkitTargetAxis {
-
-      private def targetScalaVersion(virtualAxes: Seq[VirtualAxis]): String =
-        virtualAxes.collectFirst { case a: TestkitTargetAxis =>
-          a.scalaVersion
-        }.get
-
-      def resolve[T](
-          matrix: ProjectMatrix,
-          key: TaskKey[T]
-      ): Def.Initialize[Task[T]] =
-        Def.taskDyn {
-          val sv = targetScalaVersion(virtualAxes.value)
-          val project = matrix.finder().apply(sv)
-          Def.task((project / key).value)
-        }
-
-      def resolve[T](
-          matrix: ProjectMatrix,
-          key: SettingKey[T]
-      ): Def.Initialize[T] =
-        Def.settingDyn {
-          val sv = targetScalaVersion(virtualAxes.value)
-          val project = matrix.finder().apply(sv)
-          Def.setting((project / key).value)
-        }
-    }
-
     val scalafixTestkitInputClasspath =
       taskKey[Classpath]("Classpath of input project")
     val scalafixTestkitInputScalacOptions =

src/sbt-test/sbt-1.5/testkit/build.sbt

@@ -39,41 +39,41 @@ lazy val tests = projectMatrix
   .settings(
     libraryDependencies += "ch.epfl.scala" % "scalafix-testkit" % V.scalafixVersion % Test cross CrossVersion.full,
     scalafixTestkitOutputSourceDirectories :=
-      TestkitTargetAxis
+      TargetAxis
         .resolve(output, Compile / unmanagedSourceDirectories)
         .value,
     scalafixTestkitInputSourceDirectories :=
-      TestkitTargetAxis
+      TargetAxis
         .resolve(input, Compile / unmanagedSourceDirectories)
         .value,
     scalafixTestkitInputClasspath :=
-      TestkitTargetAxis.resolve(input, Compile / fullClasspath).value,
+      TargetAxis.resolve(input, Compile / fullClasspath).value,
     scalafixTestkitInputScalacOptions :=
-      TestkitTargetAxis.resolve(input, Compile / scalacOptions).value,
+      TargetAxis.resolve(input, Compile / scalacOptions).value,
     scalafixTestkitInputScalaVersion :=
-      TestkitTargetAxis.resolve(input, Compile / scalaVersion).value
+      TargetAxis.resolve(input, Compile / scalaVersion).value
   )
   .defaultAxes(
     rulesCrossVersions.map(VirtualAxis.scalaABIVersion) :+ VirtualAxis.jvm: _*
   )
   .customRow(
     scalaVersions = Seq(V.scala212),
-    axisValues = Seq(TestkitTargetAxis(scala3Version), VirtualAxis.jvm),
+    axisValues = Seq(TargetAxis(scala3Version), VirtualAxis.jvm),
     settings = Seq()
   )
   .customRow(
     scalaVersions = Seq(V.scala213),
-    axisValues = Seq(TestkitTargetAxis(V.scala213), VirtualAxis.jvm),
+    axisValues = Seq(TargetAxis(V.scala213), VirtualAxis.jvm),
     settings = Seq()
   )
   .customRow(
     scalaVersions = Seq(V.scala212),
-    axisValues = Seq(TestkitTargetAxis(V.scala212), VirtualAxis.jvm),
+    axisValues = Seq(TargetAxis(V.scala212), VirtualAxis.jvm),
     settings = Seq()
   )
   .customRow(
     scalaVersions = Seq(V.scala211),
-    axisValues = Seq(TestkitTargetAxis(V.scala211), VirtualAxis.jvm),
+    axisValues = Seq(TargetAxis(V.scala211), VirtualAxis.jvm),
     settings = Seq()
   )
   .dependsOn(rules)

src/sbt-test/sbt-1.5/testkit/project/TargetAxis.scala

@@ -0,0 +1,47 @@
+import sbt._
+import sbt.internal.ProjectMatrix
+import sbtprojectmatrix.ProjectMatrixPlugin.autoImport._
+
+/** Use on ProjectMatrix rows to tag an affinity to a custom scalaVersion */
+case class TargetAxis(scalaVersion: String) extends VirtualAxis.WeakAxis {
+
+  private val scalaBinaryVersion = CrossVersion.binaryScalaVersion(scalaVersion)
+
+  override val idSuffix = s"Target${scalaBinaryVersion.replace('.', '_')}"
+  override val directorySuffix = s"target$scalaBinaryVersion"
+}
+
+object TargetAxis {
+
+  private def targetScalaVersion(virtualAxes: Seq[VirtualAxis]): String =
+    virtualAxes.collectFirst { case a: TargetAxis => a.scalaVersion }.get
+
+  /** When invoked on a ProjectMatrix with a TargetAxis, lookup the project
+    * generated by `matrix` with a scalaVersion matching the one defined in that
+    * and resolve `key`.
+    */
+  def resolve[T](
+      matrix: ProjectMatrix,
+      key: TaskKey[T]
+  ): Def.Initialize[Task[T]] =
+    Def.taskDyn {
+      val sv = targetScalaVersion(virtualAxes.value)
+      val project = matrix.finder().apply(sv)
+      Def.task((project / key).value)
+    }
+
+  /** When invoked on a ProjectMatrix with a TargetAxis, lookup the project
+    * generated by `matrix` with a scalaVersion matching the one defined in that
+    * and resolve `key`.
+    */
+  def resolve[T](
+      matrix: ProjectMatrix,
+      key: SettingKey[T]
+  ): Def.Initialize[T] =
+    Def.settingDyn {
+      val sv = targetScalaVersion(virtualAxes.value)
+      val project = matrix.finder().apply(sv)
+      Def.setting((project / key).value)
+    }
+
+}