refactor: update sbt-by-example

I love this guide. I always recommend it to new people getting starting
with sbt. The last couple times I did however they always came back to
me ab out certain things not working anymore, mainly the console
examples. I decided to just go through the whole thing myself and update
all of the examples using a more modern sbt version and updating the
output to match. There is also a couple other choices that I made while
updating things like:

- Changing the weather site we use as an example since it no longer is
  active
- Changing the libraries being used from gigahorse to sttp and Play JSON
  to uJson. I didn't do this _just because_ but rather to more align
  with the libraries that are being used by the scala toolkit. Hopefully
  people will be a bit more familiar with these as I don't assume a
  newcomer to Scala will be using gigahorse or really Play JSON _unless_
  they are using Play!. If this isn't ok, let me know and I can try to
  recreate it using the old libraries, but I think these examples are
  clearer.

src/sbt-test/ref/example-library/build.sbt

@@ -1,10 +1,13 @@
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .settings(
     name := "Hello",
-    libraryDependencies += "com.typesafe.play" %% "play-json" % "2.9.2",
-    libraryDependencies += "com.eed3si9n" %% "gigahorse-okhttp" % "0.5.0",
-    libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.7" % Test,
+    libraryDependencies ++= Seq(
+      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M2",
+      "com.lihaoyi" %% "ujson" % "3.1.2",
+      "org.scalatest" %% "scalatest" % "3.2.16" % Test
+    )
   )

src/sbt-test/ref/example-scalatest/build.sbt

@@ -1,8 +1,9 @@
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .settings(
     name := "Hello",
-    libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.7" % Test,
+    libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.16" % Test
   )

src/sbt-test/ref/example-scalatest/test

@@ -1,4 +1,4 @@
 > compile
 -> testQuick
-$copy-file changes/HelloSpec.scala src/test/scala/HelloSpec.scala
+$copy-file changes/HelloSpec.scala src/test/scala/example/HelloSpec.scala
 > testQuick

src/sbt-test/ref/example-sub1/build.sbt

@@ -1,14 +1,19 @@
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .settings(
     name := "Hello",
-    libraryDependencies += "com.eed3si9n" %% "gigahorse-okhttp" % "0.5.0",
-    libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.7" % Test,
+    libraryDependencies ++= Seq(
+      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M2",
+      "com.lihaoyi" %% "ujson" % "3.1.2",
+      "org.scalatest" %% "scalatest" % "3.2.16" % Test
+    )
   )
 
-lazy val helloCore = (project in file("core"))
+lazy val helloCore = project
+  .in(file("core"))
   .settings(
-    name := "Hello Core",
+    name := "Hello Core"
   )

src/sbt-test/ref/example-sub2/build.sbt

@@ -1,17 +1,22 @@
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-val scalaTest = "org.scalatest" %% "scalatest" % "3.2.7"
+val scalaTest = "org.scalatest" %% "scalatest" % "3.2.16"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .settings(
     name := "Hello",
-    libraryDependencies += "com.eed3si9n" %% "gigahorse-okhttp" % "0.5.0",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies ++= Seq(
+      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M2",
+      "com.lihaoyi" %% "ujson" % "3.1.2",
+      scalaTest % Test
+    )
   )
 
-lazy val helloCore = (project in file("core"))
+lazy val helloCore = project
+  .in(file("core"))
   .settings(
     name := "Hello Core",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies += scalaTest % Test
   )

src/sbt-test/ref/example-sub3/build.sbt

@@ -1,18 +1,23 @@
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-val scalaTest = "org.scalatest" %% "scalatest" % "3.2.7"
+val scalaTest = "org.scalatest" %% "scalatest" % "3.2.16"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .aggregate(helloCore)
   .settings(
     name := "Hello",
-    libraryDependencies += "com.eed3si9n" %% "gigahorse-okhttp" % "0.5.0",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies ++= Seq(
+      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M2",
+      "com.lihaoyi" %% "ujson" % "3.1.2",
+      scalaTest % Test
+    )
   )
 
-lazy val helloCore = (project in file("core"))
+lazy val helloCore = project
+  .in(file("core"))
   .settings(
     name := "Hello Core",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies += scalaTest % Test
   )

src/sbt-test/ref/example-sub4/build.sbt

@@ -1,19 +1,24 @@
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-val scalaTest = "org.scalatest" %% "scalatest" % "3.2.7"
+val scalaTest = "org.scalatest" %% "scalatest" % "3.2.16"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .aggregate(helloCore)
   .dependsOn(helloCore)
   .settings(
     name := "Hello",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies ++= Seq(
+      "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M2",
+      "com.lihaoyi" %% "ujson" % "3.1.2",
+      scalaTest % Test
+    )
   )
 
-lazy val helloCore = (project in file("core"))
+lazy val helloCore = project
+  .in(file("core"))
   .settings(
     name := "Hello Core",
-    libraryDependencies += "com.eed3si9n" %% "gigahorse-okhttp" % "0.5.0",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies += scalaTest % Test
   )

src/sbt-test/ref/example-weather/build.sbt

@@ -1,21 +1,26 @@
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-val scalaTest = "org.scalatest" %% "scalatest" % "3.2.7"
-val gigahorse = "com.eed3si9n" %% "gigahorse-okhttp" % "0.5.0"
-val playJson  = "com.typesafe.play" %% "play-json" % "2.9.2"
+val scalaTest = "org.scalatest" %% "scalatest" % "3.2.16"
+val sttp = "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M2"
+val ujson = "com.lihaoyi" %% "ujson" % "3.1.2"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .aggregate(helloCore)
   .dependsOn(helloCore)
   .settings(
     name := "Hello",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies += scalaTest % Test
   )
 
-lazy val helloCore = (project in file("core"))
+lazy val helloCore = project
+  .in(file("core"))
   .settings(
     name := "Hello Core",
-    libraryDependencies ++= Seq(gigahorse, playJson),
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies ++= Seq(
+      scalaTest % Test,
+      sttp,
+      ujson
+    )
   )

src/sbt-test/ref/example-weather/changes/build.sbt

@@ -1,22 +1,27 @@
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-val scalaTest = "org.scalatest" %% "scalatest" % "3.2.7"
-val gigahorse = "com.eed3si9n" %% "gigahorse-okhttp" % "0.5.0"
-val playJson  = "com.typesafe.play" %% "play-json" % "2.9.2"
+val scalaTest = "org.scalatest" %% "scalatest" % "3.2.16"
+val sttp = "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M2"
+val ujson = "com.lihaoyi" %% "ujson" % "3.1.2"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .aggregate(helloCore)
   .dependsOn(helloCore)
   .enablePlugins(JavaAppPackaging)
   .settings(
     name := "Hello",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies += scalaTest % Test
   )
 
-lazy val helloCore = (project in file("core"))
+lazy val helloCore = project
+  .in(file("core"))
   .settings(
     name := "Hello Core",
-    libraryDependencies ++= Seq(gigahorse, playJson),
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies ++= Seq(
+      scalaTest % Test,
+      sttp,
+      ujson
+    )
   )

src/sbt-test/ref/example-weather/changes/build3.sbt

@@ -1,23 +1,28 @@
-ThisBuild / version      := "0.1.0"
+ThisBuild / version := "0.1.0"
 ThisBuild / scalaVersion := "2.13.6"
 ThisBuild / organization := "com.example"
 
-val scalaTest = "org.scalatest" %% "scalatest" % "3.2.7"
-val gigahorse = "com.eed3si9n" %% "gigahorse-okhttp" % "0.5.0"
-val playJson  = "com.typesafe.play" %% "play-json" % "2.9.2"
+val scalaTest = "org.scalatest" %% "scalatest" % "3.2.16"
+val sttp = "com.softwaremill.sttp.client4" %% "core" % "4.0.0-M2"
+val ujson = "com.lihaoyi" %% "ujson" % "3.1.2"
 
-lazy val hello = (project in file("."))
+lazy val hello = project
+  .in(file("."))
   .aggregate(helloCore)
   .dependsOn(helloCore)
   .enablePlugins(JavaAppPackaging)
   .settings(
     name := "Hello",
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies += scalaTest % Test
   )
 
-lazy val helloCore = (project in file("core"))
+lazy val helloCore = project
+  .in(file("core"))
   .settings(
     name := "Hello Core",
-    libraryDependencies ++= Seq(gigahorse, playJson),
-    libraryDependencies += scalaTest % Test,
+    libraryDependencies ++= Seq(
+      scalaTest % Test,
+      sttp,
+      ujson
+    )
   )

src/sbt-test/ref/example-weather/changes/plugins.sbt

@@ -1 +1 @@
-addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.4")
+addSbtPlugin("com.github.sbt" % "sbt-native-packager" % "1.9.4")

src/sbt-test/ref/example-weather/core/src/main/scala/example/core/Weather.scala

@@ -1,26 +1,19 @@
 package example.core
 
-import gigahorse._, support.okhttp.Gigahorse
-import scala.concurrent._, duration._
-import play.api.libs.json._
+import sttp.client4.quick._
+import sttp.client4.Response
 
 object Weather {
-  lazy val http = Gigahorse.http(Gigahorse.config)
-
-  def weather: Future[String] = {
-    val baseUrl = "https://www.metaweather.com/api/location"
-    val locUrl = baseUrl + "/search/"
-    val weatherUrl = baseUrl + "/%s/"
-    val rLoc = Gigahorse.url(locUrl).get.
-      addQueryString("query" -> "New York")
-    import ExecutionContext.Implicits.global
-    for {
-      loc <- http.run(rLoc, parse)
-      woeid = (loc \ 0  \ "woeid").get
-      rWeather = Gigahorse.url(weatherUrl format woeid).get
-      weather <- http.run(rWeather, parse)
-    } yield (weather \\ "weather_state_name")(0).as[String].toLowerCase
+  def weather() = {
+    val response: Response[String] = quickRequest
+      .get(
+        uri"https://api.open-meteo.com/v1/forecast?latitude=$newYorkLatitude&longitude=$newYorkLongitude&current_weather=true"
+      )
+      .send()
+    val json = ujson.read(response.body)
+    json.obj("current_weather")("temperature").num
   }
 
-  private def parse = Gigahorse.asString andThen Json.parse
+  private val newYorkLatitude: Double = 40.7143
+  private val newYorkLongitude: Double = -74.006
 }

src/sbt-test/ref/example-weather/src/main/scala/example/Hello.scala

@@ -1,12 +1,10 @@
 package example
 
-import scala.concurrent._, duration._
-import core.Weather
+import example.core.Weather
 
 object Hello {
   def main(args: Array[String]): Unit = {
-    val w = Await.result(Weather.weather, 10.seconds)
-    println(s"Hello! The weather in New York is $w.")
-    Weather.http.close()
+    val temp = Weather.weather()
+    println(s"Hello! The current temperature in New York is $temp C.")
   }
 }