prepare release 4.2.1-M2

Author: bjornregnell

build.sbt

@@ -1,14 +1,16 @@
-ThisBuild / version      := "4.2.1-M2"
-
-ThisBuild / scalaVersion := "3.3.3"  // use LTS
+lazy val reqTLangVer = "4.2.1-M2"
+lazy val scalaVer    = "3.3.3"  // use LTS only
+lazy val munitVer    = "0.7.29"
 
+ThisBuild / version      := reqTLangVer
+ThisBuild / scalaVersion := scalaVer  // use LTS
 ThisBuild / organization := "io.github.reqt"
 
 console / initialCommands := """import reqt.*"""
 
 Global / onChangedBuildSource := ReloadOnSourceChanges
 
-libraryDependencies += "org.scalameta" %% "munit" % "0.7.29" % Test
+libraryDependencies += "org.scalameta" %% "munit" % munitVer % Test
 
 lazy val nameOfThisBuild = "reqt-lang"
 

publish.sc

@@ -0,0 +1,63 @@
+// run with `scala-cli run publish.sc`
+
+//> using scala 3.4
+//> using toolkit default
+
+println("*** Publish the reqT-lang jar to github using sbt and gh ***\n")
+
+val wd = os.pwd
+
+def yes(msg: String): Boolean = 
+  scala.io.StdIn.readLine(msg).headOption.map(_.toUpper) == Some('Y')
+
+def getFromBuild(key: String): Option[String] = util.Try{
+    val lines = os.read(wd / "build.sbt").split("\n").toSeq
+    val line: String = lines.filter(_.contains(s"val $key")).head
+    val value: String = line.split("=").toSeq.last.trim.takeWhile(!_.isWhitespace)
+    value.stripPrefix("\"").stripSuffix("\"")
+  }.toOption
+
+extension (s: Seq[String]) def showSeq = s.mkString(" ")
+
+val scalaVer = getFromBuild("scalaVer").getOrElse("")
+val reqTLangVer = getFromBuild("reqTLangVer").getOrElse("")
+
+println("from build.sbt:")
+println(s"""val reqTLangVer = "$reqTLangVer"""")
+println(s"""val scalaVer    = "$scalaVer"""")
+
+println(s"""\n*** Step 1: sbt "clean; package" """)
+
+if yes("Do you want a clean build (Y/n)? ") then
+  os.proc("sbt", "clean;package").call(cwd = wd, stdout = os.Inherit)
+
+
+val dir = s"${os.pwd}/target/scala-$scalaVer"
+val jar = s"$dir/reqt-lang_3-$reqTLangVer.jar"
+
+if !os.exists(os.Path(jar)) then 
+  println(s"Error: Missing jar-file; $jar")
+  System.exit(1)
+else
+  println(s"\n*** Step 2: publish to github using gh")
+  if reqTLangVer.isEmpty then 
+      println("val reqTLangVer not found in build.sbt")
+      sys.exit(1)
+  else 
+    val preRel = 
+      if reqTLangVer.contains("-M") || reqTLangVer.contains("_RC") then Seq("--prerelease") else Seq()
+    val assemblyCmd = Seq()
+    val createCmd = Seq("gh", "release", "create", reqTLangVer, "--generate-notes") ++ preRel
+
+    val uploadCmd = Seq("gh", "release", "upload", reqTLangVer, jar)
+
+    val ghOpt = util.Try{os.proc("which", "gh").call(cwd = wd)}.toOption
+
+    if ghOpt == None then 
+      println("You need the github CLI 'gh' command on your path")
+      println("Install from here: https://github.com/cli/cli/")
+
+    println("\nRun these commands in terminal:\n")
+    println(createCmd.showSeq)
+    println(uploadCmd.showSeq)
+

src/test/scala/TestModelOps.scala

@@ -171,7 +171,7 @@ class TestModelOps extends munit.FunSuite:
   test("Model ordering          "):
     val m = Model(
       Stakeholder("a"),
-      Feature("x").has(
+      Feature("x").has( 
         Stakeholder("b"),
         Req("a") has Rank(2),
         Req("b") has Rank(3),