Support for new command

build.sc

@@ -781,6 +781,7 @@ trait Cli extends SbtModule with ProtoBuildModule with CliLaunchers
     Deps.coursierLauncher,
     Deps.coursierProxySetup,
     Deps.coursierPublish.exclude((organization, "config_2.13")),
+    Deps.giter8,
     Deps.jimfs, // scalaJsEnvNodeJs pulls jimfs:1.1, whose class path seems borked (bin compat issue with the guava version it depends on)
     Deps.jniUtils,
     Deps.jsoniterCore,

modules/cli/src/main/scala/scala/cli/ScalaCliCommands.scala

@@ -42,6 +42,7 @@ class ScalaCliCommands(
     new HelpCmd(help),
     installcompletions.InstallCompletions,
     installhome.InstallHome,
+    `new`.New,
     repl.Repl,
     package0.Package,
     pgp.PgpPull,

modules/cli/src/main/scala/scala/cli/commands/new/New.scala

@@ -0,0 +1,18 @@
+package scala.cli.commands.`new`
+
+import scala.cli.commands.ScalaCommand
+import scala.cli.commands.shared.HelpCommandGroup
+import scala.build.Logger
+import caseapp.core.RemainingArgs
+import giter8.Giter8
+
+object New extends ScalaCommand[NewOptions] {
+  override def group: String = HelpCommandGroup.Main.toString
+
+  override def scalaSpecificationLevel = SpecificationLevel.IMPLEMENTATION
+
+  override def runCommand(options: NewOptions, remainingArgs: RemainingArgs, logger: Logger): Unit =
+    val inputArgs = remainingArgs.remaining
+    Giter8.run(inputArgs.toArray)
+    ()
+}

modules/cli/src/main/scala/scala/cli/commands/new/NewOptions.scala

@@ -0,0 +1,25 @@
+package scala.cli.commands.`new`
+
+import caseapp.*
+import scala.cli.commands.shared.*
+
+@HelpMessage(NewOptions.newMessage, "", NewOptions.detailedNewMessage)
+final case class NewOptions(
+  @Recurse
+  shared: SharedOptions = SharedOptions()
+) extends HasSharedOptions
+
+object NewOptions {
+  implicit lazy val parser: Parser[NewOptions] = Parser.derive
+  implicit lazy val help: Help[NewOptions]     = Help.derive
+  val cmdName                                  = "new"
+  private val newHeader                        = "New giter8 template."
+  val newMessage: String                       = HelpMessages.shortHelpMessage(cmdName, newHeader)
+
+  val detailedNewMessage: String =
+    s"""$newHeader
+       |
+       | Creates a new project from a giter8 template.
+       |
+       |""".stripMargin
+}

project/deps.sc

@@ -113,6 +113,7 @@ object Deps {
   // TODO bump once 0.15.5 is out
   def expecty       = ivy"com.eed3si9n.expecty::expecty:0.16.0"
   def fansi         = ivy"com.lihaoyi::fansi:0.4.0"
+  def giter8        = ivy"org.foundweekends.giter8:giter8_2.13:0.16.2"
   def guava         = ivy"com.google.guava:guava:32.0.0-jre"
   def javaClassName = ivy"io.github.alexarchambault.scala-cli:java-class-name_3:0.1.0"
   def jgit          = ivy"org.eclipse.jgit:org.eclipse.jgit:6.5.0.202303070854-r"