Create a Scala project from Fish shell

mkscala.fish

function mkscala --argument proj org tld
  set -q tld[1]
  or set tld "com"
  set -q org[1]
  or set org "example"
	echo "Creating a Scala project called" $proj
	mkdir -p $proj/{project,src}
	mkdir -p $proj/src/{main,test}/{java,scala,resources}
  mkdir -p $proj/src/{main,test}/scala/$tld/$org/$proj

  echo "sbt.version=1.2.8" > $proj/project/build.properties

  echo "import sbt._

object Dependencies {
  lazy val scalaTest =\"org.scalatest\" %% \"scalatest\" % \"3.0.5\"
}" > $proj/project/Dependencies.scala

  echo "import Dependencies._

ThisBuild / scalaVersion     := \"2.12.8\"
ThisBuild / version          := \"0.1.0-SNAPSHOT\"
ThisBuild / organization     := \""$tld"."$org"\"
ThisBuild / organizationName := \""$org"\"

lazy val root = (project in file(\".\"))
  .settings(
    name := \""$proj"\",
    libraryDependencies += scalaTest % Test
  )" > $proj/build.sbt

  echo "package "$proj"

object Hello extends Greeting with App {
  println(greeting)
}

trait Greeting {
  lazy val greeting: String = \"hello\"
}" > $proj/src/main/scala/$tld/$org/$proj/Hello.scala

  echo "package "$proj"

import org.scalatest._

class HelloSpec extends FlatSpec with Matchers {
  \"The Hello object\" should \"say hello\" in {
    Hello.greeting shouldEqual \"hello\"
  }
}" > $proj/src/test/scala/$tld/$org/$proj/TestHello.scala
end