Expose project axes

.gitignore

@@ -0,0 +1,17 @@
+.bloop
+.metals
+
+target
+
+project/.bloop
+project/target
+project/project/target
+
+*.class
+
+metals.sbt
+
+src/sbt-test/projectMatrix/projectAxes/target
+src/sbt-test/projectMatrix/projectAxes/project/target
+
+

src/main/scala/sbt/internal/ProjectMatrix.scala

@@ -8,6 +8,8 @@ import Keys._
 import scala.util.Try
 import sbt.internal.inc.ReflectUtilities
 
+import sbtprojectmatrix.ProjectMatrixKeys
+
 /**
  * A project matrix is an implementation of a composite project
  * that represents cross building across some axis (such as platform)
@@ -261,6 +263,7 @@ object ProjectMatrix {
             inConfig(Compile)(makeSources(nonScalaDirSuffix, svDirSuffix)),
             inConfig(Test)(makeSources(nonScalaDirSuffix, svDirSuffix)),
             projectDependencies := projectDependenciesTask.value,
+            ProjectMatrixKeys.projectAxes := axes
           )
           .settings(self.settings)
           .configure(transforms: _*)

src/main/scala/sbtprojectmatrix/ProjectMatrixPlugin.scala

@@ -5,10 +5,16 @@ import internal._
 import java.util.concurrent.atomic.AtomicBoolean
 import scala.language.experimental.macros
 
+trait ProjectMatrixKeys {
+    val projectAxes = settingKey[Seq[VirtualAxis]]("Virtual axes for the project")
+}
+
+object ProjectMatrixKeys extends ProjectMatrixKeys
+
 object ProjectMatrixPlugin extends AutoPlugin {
   override val requires = sbt.plugins.CorePlugin
   override val trigger = allRequirements
-  object autoImport {
+  object autoImport extends ProjectMatrixKeys {
     def projectMatrix: ProjectMatrix = macro ProjectMatrix.projectMatrixMacroImpl
 
     implicit def matrixClasspathDependency[T](

src/sbt-test/projectMatrix/projectAxes/build.sbt

@@ -0,0 +1,55 @@
+lazy val scala213 = "2.13.3"
+lazy val scala212 = "2.12.12"
+lazy val check = taskKey[Unit]("")
+lazy val platformTest = settingKey[String]("")
+lazy val configTest = settingKey[String]("")
+
+
+lazy val config12 = ConfigAxis("Config1_2", "config1.2")
+lazy val config13 = ConfigAxis("Config1_3", "config1.3")
+
+lazy val root = (project in file("."))
+  .aggregate((core.projectRefs ++ custom.projectRefs):_*)
+
+lazy val core = (projectMatrix in file("core"))
+  .settings(
+    check := {
+       assert(platformTest.value.endsWith("-platform"))
+    },
+  )
+  .jvmPlatform(scalaVersions = Seq(scala213, scala212))
+  .jsPlatform(scalaVersions = Seq(scala212))
+  .settings(platformSettings)
+
+lazy val custom =
+  (projectMatrix in file("custom"))
+  .customRow(
+    scalaVersions = Seq(scala212),
+    axisValues = Seq(config13, VirtualAxis.jvm),
+    _.settings()
+  )
+  .settings(platformSettings)
+  .settings(customSettings)
+  .settings(
+    check := {
+      assert(platformTest.value.endsWith("-platform"))
+      assert(configTest.value.startsWith("config for"))
+    }
+  )
+
+
+lazy val platformSettings = Seq[Def.Setting[_]](
+    platformTest := {
+      if(projectAxes.value.contains(sbt.VirtualAxis.js)) "js-platform"
+      else if(projectAxes.value.contains(sbt.VirtualAxis.jvm)) "jvm-platform"
+      else throw new RuntimeException(s"Something must be wrong (built-in platforms test) - projectAxes value is ${projectAxes.value}")
+    }
+)
+
+lazy val customSettings = Seq[Def.Setting[_]](
+  configTest := {
+    if(projectAxes.value.contains(config12)) "config for 1.2"
+    else if (projectAxes.value.contains(config13)) "config for 1.3"
+    else throw new RuntimeException(s"Something must be wrong (custom axis test ) - projectAxes value is ${projectAxes.value}")
+  }
+)

src/sbt-test/projectMatrix/projectAxes/project/ConfigAxis.scala

@@ -0,0 +1,3 @@
+import sbt._
+
+case class ConfigAxis(idSuffix: String, directorySuffix: String) extends VirtualAxis.WeakAxis

src/sbt-test/projectMatrix/projectAxes/project/build.properties

@@ -0,0 +1 @@
+sbt.version=1.4.0-M1

src/sbt-test/projectMatrix/projectAxes/project/plugins.sbt

@@ -0,0 +1,7 @@
+sys.props.get("plugin.version") match {
+  case Some(x) => addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % x)
+  case _ => sys.error("""|The system property 'plugin.version' is not defined.
+                         |Specify this property using the scriptedLaunchOpts -D.""".stripMargin)
+}
+
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.27")

src/sbt-test/projectMatrix/projectAxes/test

@@ -0,0 +1,2 @@
+> compile
+> check