Fix case-app initialization (#195)

* Print launcher help as a sanity check on the CI

* Fix `case-app` initialization

.github/workflows/ci.yml

@@ -26,6 +26,8 @@ jobs:
         apps: 'sbt'
     - name: Test
       run: sbt +test
+    - name: Print help
+      run: sbt "cli/run --help"
 
   publish:
     needs: test

modules/cli/src/main/scala/packager/cli/PackagerCli.scala

@@ -1,18 +1,17 @@
 package packager.cli
 
-import caseapp.core.app.CommandsEntryPoint
+import caseapp.core.app.{Command, CommandsEntryPoint}
 import packager.cli.commands.Build
 
 object PackagerCli extends CommandsEntryPoint {
 
-  final override def defaultCommand = Some(Build)
+  final override def defaultCommand: Option[Command[_]] = Some(Build)
 
   override def enableCompleteCommand    = true
   override def enableCompletionsCommand = true
 
-  val commands = Seq(
-    Build
-  )
+  def commands: Seq[Command[_]] =
+    Seq(Build)
 
   override def progName: String = "packager"
 }

modules/cli/src/main/scala/packager/cli/commands/Build.scala

@@ -3,6 +3,7 @@ package packager.cli.commands
 import caseapp.core.RemainingArgs
 import caseapp.core.app.Command
 import BuildOptions.NativePackagerType._
+import caseapp.core.parser.Parser
 import packager.cli.commands.BuildOptions.PackagerType.Docker
 import packager.config.SharedSettings
 import packager.deb.DebianPackage
@@ -13,6 +14,7 @@ import packager.rpm.RedHatPackage
 import packager.windows.{DefaultImageResizer, WindowsPackage}
 
 object Build extends Command[BuildOptions] {
+  override def name: String = "build"
   override def run(
     options: BuildOptions,
     remainingArgs: RemainingArgs

modules/cli/src/main/scala/packager/cli/commands/BuildOptions.scala

@@ -107,6 +107,7 @@ object BuildOptions {
     case object Rpm    extends NativePackagerType
   }
 
-  implicit val parser: Parser[BuildOptions] = Parser[BuildOptions]
-  implicit val help: Help[BuildOptions]     = Help[BuildOptions]
+  lazy val parser: Parser[BuildOptions]                           = Parser.derive
+  implicit lazy val parserAux: Parser.Aux[BuildOptions, parser.D] = parser
+  implicit lazy val help: Help[BuildOptions]                      = Help.derive
 }

modules/cli/src/main/scala/packager/cli/commands/DebianOptions.scala

@@ -54,8 +54,7 @@ final case class DebianOptions(
 }
 
 case object DebianOptions {
-
-  implicit val parser: Parser[DebianOptions] = Parser[DebianOptions]
-  implicit val help: Help[DebianOptions]     = Help[DebianOptions]
-
+  lazy val parser: Parser[DebianOptions]                           = Parser.derive
+  implicit lazy val parserAux: Parser.Aux[DebianOptions, parser.D] = parser
+  implicit lazy val help: Help[DebianOptions]                      = Help.derive
 }

modules/cli/src/main/scala/packager/cli/commands/DockerOptions.scala

@@ -58,7 +58,8 @@ final case class DockerOptions(
 
 case object DockerOptions {
 
-  implicit val parser: Parser[DockerOptions] = Parser[DockerOptions]
-  implicit val help: Help[DockerOptions]     = Help[DockerOptions]
+  lazy val parser: Parser[DockerOptions]                           = Parser.derive
+  implicit lazy val parserAux: Parser.Aux[DockerOptions, parser.D] = parser
+  implicit lazy val help: Help[DockerOptions]                      = Help.derive
 
 }

modules/cli/src/main/scala/packager/cli/commands/MacOSOptions.scala

@@ -22,8 +22,7 @@ final case class MacOSOptions(
 }
 
 case object MacOSOptions {
-
-  implicit val parser: Parser[MacOSOptions] = Parser[MacOSOptions]
-  implicit val help: Help[MacOSOptions]     = Help[MacOSOptions]
-
+  lazy val parser: Parser[MacOSOptions]                           = Parser.derive
+  implicit lazy val parserAux: Parser.Aux[MacOSOptions, parser.D] = parser
+  implicit lazy val help: Help[MacOSOptions]                      = Help.derive
 }

modules/cli/src/main/scala/packager/cli/commands/RedHatOptions.scala

@@ -40,8 +40,7 @@ final case class RedHatOptions(
 }
 
 case object RedHatOptions {
-
-  implicit val parser: Parser[RedHatOptions] = Parser[RedHatOptions]
-  implicit val help: Help[RedHatOptions]     = Help[RedHatOptions]
-
+  lazy val parser: Parser[RedHatOptions]                           = Parser.derive
+  implicit lazy val parserAux: Parser.Aux[RedHatOptions, parser.D] = parser
+  implicit lazy val help: Help[RedHatOptions]                      = Help.derive
 }

modules/cli/src/main/scala/packager/cli/commands/SharedOptions.scala

@@ -32,7 +32,7 @@ final case class SharedOptions(
   logoPath: Option[String] = None
 )
 case object SharedOptions {
-
-  implicit val parser: Parser[SharedOptions] = Parser[SharedOptions]
-  implicit val help: Help[SharedOptions]     = Help[SharedOptions]
+  lazy val parser: Parser[SharedOptions]                           = Parser.derive
+  implicit lazy val parserAux: Parser.Aux[SharedOptions, parser.D] = parser
+  implicit lazy val help: Help[SharedOptions]                      = Help.derive
 }

modules/cli/src/main/scala/packager/cli/commands/WindowsOptions.scala

@@ -62,7 +62,7 @@ final case class WindowsOptions(
 }
 
 case object WindowsOptions {
-
-  implicit val parser: Parser[WindowsOptions] = Parser[WindowsOptions]
-  implicit val help: Help[WindowsOptions]     = Help[WindowsOptions]
+  lazy val parser: Parser[WindowsOptions]                           = Parser.derive
+  implicit lazy val parserAux: Parser.Aux[WindowsOptions, parser.D] = parser
+  implicit lazy val help: Help[WindowsOptions]                      = Help.derive
 }