Require JDK13+ due to the use of FileSystems.newFileSystem(Path) (#5724)

* Require JDK13+ due to the use of `FileSystems.newFileSystem(Path)`

* Release to remain 11

Co-authored-by: Michael Pollmeier <michael@michaelpollmeier.com>

* Release to remain 11, not 13

---------

Co-authored-by: Michael Pollmeier <michael@michaelpollmeier.com>

Author: gacevedo

build.sbt

@@ -61,9 +61,9 @@ ThisBuild / compile / javacOptions ++= Seq(
   "-Xlint",
   "--release=11"
 ) ++ {
-  // fail early if users with JDK8 try to run this
+  // Require Java 13+ due to FileSystems.newFileSystem(Path) API used in project/FileUtils.scala
   val javaVersion = sys.props("java.specification.version").toFloat
-  assert(javaVersion.toInt >= 11, s"this build requires JDK11+ - you're using $javaVersion")
+  assert(javaVersion.toInt >= 13, s"this build requires JDK13+ - you're using $javaVersion")
   Nil
 }
 

project/meta-build.sbt

@@ -1,3 +1,11 @@
+// Require Java 13+ due to FileSystems.newFileSystem(Path) API used in project/FileUtils.scala
+// This method signature was added in JDK13
+initialize := {
+  val _ = initialize.value
+  val javaVersion = sys.props("java.specification.version").toFloat
+  assert(javaVersion.toInt >= 13, s"this build requires JDK13+ - you're using $javaVersion")
+}
+
 libraryDependencies ++= Seq(
   "com.typesafe"          % "config"       % "1.4.3",
   "com.michaelpollmeier"  % "versionsort"  % "1.0.11",