Support Scala 3 build #17

Build setup and changes needed to compile with Scala 3

.scalafmt.conf

@@ -0,0 +1,17 @@
+version = 3.2.0
+
+runner.dialect = scala213source3
+fileOverride {
+  "glob:**/src/main/scala-3/**" {
+    runner.dialect = scala3
+  }
+}
+
+preset = IntelliJ
+align.preset = more
+maxColumn = 120
+docstrings.style = Asterisk
+docstrings.blankFirstLine = yes
+docstrings.wrap = no
+importSelectors = singleLine
+newlines.source = keep

build.sbt

@@ -2,61 +2,75 @@ import xerial.sbt.Sonatype.GitHubHosting
 
 import java.net.URL
 
-// @formatter:off
-
 name := "ijp-debayer2sx"
 
-val _version = "1.3.0.1-SNAPSHOT"
-val _scalaVersions = Seq("2.13.5", "2.12.13")
-val _scalaVersion  = _scalaVersions.head
+ThisBuild / version := "1.3.0.1-SNAPSHOT"
+ThisBuild / organization := "net.sf.ij-plugins"
+ThisBuild / sonatypeProfileName := "net.sf.ij-plugins"
+ThisBuild / homepage := Some(new URL("https://github.com/ij-plugins/ijp-color"))
+ThisBuild / startYear := Some(2002)
+ThisBuild / licenses := Seq(("LGPL-2.1", new URL("http://opensource.org/licenses/LGPL-2.1")))
+
+ThisBuild / scalaVersion := "2.13.7"
+ThisBuild / crossScalaVersions := Seq("2.13.7", "2.12.15", "3.0.2")
 
-version         := _version
-scalaVersion    := _scalaVersion
 publishArtifact := false
-publish / skip  := true
-sonatypeProfileName := "net.sf.ij-plugins"
+publish / skip := true
+
+/** Return `true` if scala version corresponds to Scala 2, `false` otherwise */
+def isScala2(scalaVersion: String): Boolean = {
+  CrossVersion.partialVersion(scalaVersion) match {
+    case Some((2, _)) => true
+    case _ => false
+  }
+}
 
 val commonSettings = Seq(
-  version      := _version,
-  organization := "net.sf.ij-plugins",
-  homepage     := Some(new URL("https://github.com/ij-plugins/ijp-color")),
-  startYear    := Some(2002),
-  licenses     := Seq(("LGPL-2.1", new URL("http://opensource.org/licenses/LGPL-2.1"))),
-  //
-  crossScalaVersions := _scalaVersions,
-  scalaVersion       := _scalaVersion,
-  //
   scalacOptions ++= Seq(
-    "-encoding", "UTF-8",
-    "-unchecked", 
-    "-deprecation", 
-    "-Xlint", 
+    "-encoding",
+    "UTF-8",
+    "-unchecked",
+    "-deprecation",
     "-feature",
-    "-explaintypes",
-    "-release", "8",
-  ),
+    "-release",
+    "8"
+  ) ++ (
+    if (isScala2(scalaVersion.value))
+      Seq(
+        "-Xlint",
+        "-explaintypes",
+        "-Xsource:3"
+      )
+    else
+      Seq(
+        "-explain"
+      )
+    ),
   scalacOptions ++= {
     CrossVersion.partialVersion(scalaVersion.value) match {
       case Some((2, 13)) => Seq("-target:8")
       case _ => Seq.empty[String]
     }
   },
   Compile / doc / scalacOptions ++= Opts.doc.title("IJP Debayer2SX API"),
-  Compile / doc / scalacOptions ++= Opts.doc.version(_version),
+  Compile / doc / scalacOptions ++= Opts.doc.version(version.value),
   Compile / doc / scalacOptions ++= Seq(
-    "-doc-footer", s"IJP Debayer2SX API v.${_version}",
-    "-doc-root-content", baseDirectory.value + "/src/main/scala/root-doc.creole"
+    "-doc-footer",
+    s"IJP Debayer2SX API v.${version.value}",
+    "-doc-root-content",
+    baseDirectory.value + "/src/main/scala/root-doc.creole"
   ),
   Compile / doc / scalacOptions ++= (
     Option(System.getenv("GRAPHVIZ_DOT_PATH")) match {
       case Some(path) => Seq("-diagrams", "-diagrams-dot-path", path, "-diagrams-debug")
       case None => Seq.empty[String]
-    }),
-  Compile / compile / javacOptions ++= Seq("-deprecation", "-Xlint", "-source",  "1.8", "-target",  "1.8"),
+    }
+    ),
+  Compile / compile / javacOptions ++= Seq("-deprecation", "-Xlint", "-source", "1.8", "-target", "1.8"),
   //
   libraryDependencies ++= Seq(
-    "net.imagej"     % "ij"        % "1.53i",
-    "org.scalatest" %% "scalatest" % "3.2.8"  % "test",
+    "net.imagej" % "ij" % "1.53i",
+    "org.scalatest" %% "scalatest" % "3.2.10" % "test"
   ),
   resolvers += Resolver.sonatypeRepo("snapshots"),
   //
@@ -71,59 +85,75 @@ val commonSettings = Seq(
   manifestSetting,
   // Setup publishing
   publishMavenStyle := true,
-  sonatypeProfileName := "net.sf.ij-plugins",
   sonatypeProjectHosting := Some(GitHubHosting("ij-plugins", "ijp-debayer2sx", "[email protected]")),
   publishTo := sonatypePublishToBundle.value,
   developers := List(
-    Developer(id="jpsacha", name="Jarek Sacha", email="[email protected]", url=url("https://github.com/jpsacha"))
+    Developer(
+      id = "jpsacha",
+      name = "Jarek Sacha",
+      email = "[email protected]",
+      url = url("https://github.com/jpsacha")
+    )
   )
 )
 
 lazy val ijp_debayer2sx_core = project.in(file("ijp-debayer2sx-core"))
   .settings(
-    name        := "ijp-debayer2sx-core",
+    name := "ijp-debayer2sx-core",
     description := "IJP DeBayer2SX Core",
     commonSettings,
-    libraryDependencies += "com.beachape" %% "enumeratum" % "1.6.1",
-    libraryDependencies += "io.github.metarank" %% "cfor" % "0.2"
+    libraryDependencies ++= {
+      if (isScala2(scalaVersion.value)) {
+        Seq(
+          "com.beachape" %% "enumeratum" % "1.6.1",
+          "io.github.metarank" %% "cfor" % "0.2"
+        )
+      } else {
+        Seq.empty[ModuleID]
+      }
+    }
   )
 
 lazy val ijp_debayer2sx_plugins = project.in(file("ijp-debayer2sx-plugins"))
   .settings(
     name        := "ijp-debayer2sx-plugins",
     description := "IJP DeBayer2SX ImageJ Plugins",
-    commonSettings,
+    commonSettings
   )
   .dependsOn(ijp_debayer2sx_core)
 
 lazy val ijp_debayer2sx_demos = project.in(file("ijp-debayer2sx-demos"))
-  .settings(commonSettings,
-    name        := "ijp-debayer2sx-demos",
+  .settings(
+    commonSettings,
+    name := "ijp-debayer2sx-demos",
     description := "IJP DeBayer2SX Demos",
     publishArtifact := false,
-    publish / skip  := true)
+    publish / skip := true
+  )
   .dependsOn(ijp_debayer2sx_core)
 
 lazy val ijp_debayer2sx_experimental = project.in(file("ijp-debayer2sx-experimental"))
-  .settings(commonSettings,
-    name        := "ijp-debayer2sx-experimental",
+  .settings(
+    commonSettings,
+    name := "ijp-debayer2sx-experimental",
     description := "Experimental Features",
     publishArtifact := false,
-    publish / skip  := true)
+    publish / skip := true
+  )
   .dependsOn(ijp_debayer2sx_core)
 
 lazy val manifestSetting = packageOptions += {
   Package.ManifestAttributes(
     "Created-By" -> "Simple Build Tool",
-    "Built-By"  -> Option(System.getenv("JAR_BUILT_BY")).getOrElse(System.getProperty("user.name")),
+    "Built-By" -> Option(System.getenv("JAR_BUILT_BY")).getOrElse(System.getProperty("user.name")),
     "Build-Jdk" -> System.getProperty("java.version"),
-    "Specification-Title"      -> name.value,
-    "Specification-Version"    -> version.value,
-    "Specification-Vendor"     -> organization.value,
-    "Implementation-Title"     -> name.value,
-    "Implementation-Version"   -> version.value,
+    "Specification-Title" -> name.value,
+    "Specification-Version" -> version.value,
+    "Specification-Vendor" -> organization.value,
+    "Implementation-Title" -> name.value,
+    "Implementation-Version" -> version.value,
     "Implementation-Vendor-Id" -> organization.value,
-    "Implementation-Vendor"    -> organization.value
+    "Implementation-Vendor" -> organization.value
   )
 }
 
@@ -135,5 +165,4 @@ ijCleanBeforePrepareRun := true
 // Instruct `clean` to delete created plugins subdirectory created by `ijRun`/`ijPrepareRun`.
 cleanFiles += ijPluginsDir.value
 
-
-addCommandAlias("ijRun", "ijp_debayer2sx_plugins/ijRun")
+addCommandAlias("ijRun", "ijp_debayer2sx_plugins/ijRun")

ijp-debayer2sx-core/src/main/scala/ij_plugins/debayer2sx/DeBayer2Config.scala → ijp-debayer2sx-core/src/main/scala-2/ij_plugins/debayer2sx/DeBayer2Config.scala

@@ -74,5 +74,4 @@ object DeBayer2Config {
 
 }
 
-case class DeBayer2Config(mosaicOrder: MosaicOrder = MosaicOrder.R_G,
-                          demosaicing: Demosaicing = Demosaicing.DDFAPD)
+case class DeBayer2Config(mosaicOrder: MosaicOrder = MosaicOrder.R_G, demosaicing: Demosaicing = Demosaicing.DDFAPD)