Support the --test flag with the publish & publish local sub-commands

modules/cli/src/main/scala/scala/cli/commands/publish/PublishLocal.scala

@@ -86,7 +86,8 @@ object PublishLocal extends ScalaCommand[PublishLocalOptions] {
       isCi = options.publishParams.isCi,
       () => ConfigDb.empty, // shouldn't be used, no need of repo credentials here
       options.mainClass,
-      dummy = options.sharedPublish.dummy
+      dummy = options.sharedPublish.dummy,
+      buildTests = options.sharedPublish.scope.test
     )
   }
 }

modules/cli/src/main/scala/scala/cli/commands/publish/SharedPublishOptions.scala

@@ -3,7 +3,7 @@ package scala.cli.commands.publish
 import caseapp.*
 
 import scala.build.compiler.{ScalaCompilerMaker, SimpleScalaCompilerMaker}
-import scala.cli.commands.shared.HelpGroup
+import scala.cli.commands.shared.{HelpGroup, ScopeOptions}
 import scala.cli.commands.tags
 
 // format: off
@@ -85,7 +85,10 @@ final case class SharedPublishOptions(
   @Group(HelpGroup.Publishing.toString)
   @HelpMessage("Proceed as if publishing, but do not upload / write artifacts to the remote repository")
   @Tag(tags.implementation)
-    dummy: Boolean = false
+    dummy: Boolean = false,
+
+  @Recurse
+    scope: ScopeOptions = ScopeOptions()
 ){
   // format: on
 

modules/cli/src/main/scala/scala/cli/packaging/Library.scala

@@ -65,7 +65,7 @@ object Library {
       } manifest.getMainAttributes.put(JarAttributes.Name.MAIN_CLASS, mainClass)
 
     var zos: ZipOutputStream = null
-    val contentDirs          = builds.map(b => contentDirOverride.getOrElse(b.output))
+    val contentDirs          = builds.map(b => contentDirOverride.getOrElse(b.output)).distinct
 
     try {
       zos = new JarOutputStream(outputStream, manifest)

modules/integration/src/test/scala/scala/cli/integration/PublishLocalTestDefinitions.scala

@@ -17,8 +17,9 @@ abstract class PublishLocalTestDefinitions extends ScalaCliSuite with TestScalaV
   private object PublishTestInputs {
     def testOrg: String  = "test-local-org.sth"
     def testName: String = "my-proj"
-    def projFile(message: String, exclude: Boolean = false): String =
+    def projFile(message: String, exclude: Boolean = false, useTestScope: Boolean = false): String =
       s"""//> using scala $testedPublishedScalaVersion
+         |${if (useTestScope) "//> using target.scope test" else ""}
          |//> using dep com.lihaoyi::os-lib:0.11.3${Some(",exclude=com.lihaoyi%%geny").filter(_ =>
           exclude
         ).getOrElse("")}
@@ -46,11 +47,12 @@ abstract class PublishLocalTestDefinitions extends ScalaCliSuite with TestScalaV
     def inputs(
       message: String = "Hello",
       includePublishVersion: Boolean = true,
-      excludeGeny: Boolean = false
+      excludeGeny: Boolean = false,
+      useTestScope: Boolean = false
     ): TestInputs =
       TestInputs(
-        os.rel / "project.scala"      -> projFile(message, excludeGeny),
-        os.rel / "publish-conf.scala" -> publishConfFile(includePublishVersion)
+        os.rel / "src" / "project.scala"      -> projFile(message, excludeGeny, useTestScope),
+        os.rel / "src" / "publish-conf.scala" -> publishConfFile(includePublishVersion)
       )
   }
 
@@ -306,4 +308,24 @@ abstract class PublishLocalTestDefinitions extends ScalaCliSuite with TestScalaV
           expect(unexpectedFiles.isEmpty)
         }
     }
+
+  test("publish local with test scope") {
+    val expectedMessage = "Hello"
+    PublishTestInputs.inputs(message = expectedMessage, useTestScope = true).fromRoot { root =>
+      os.proc(
+        TestUtil.cli,
+        "--power",
+        "publish",
+        "local",
+        ".",
+        "--test",
+        extraOptions
+      )
+        .call(cwd = root)
+      val publishedDep =
+        s"${PublishTestInputs.testOrg}:${PublishTestInputs.testName}_$testedPublishedScalaVersion:$testPublishVersion"
+      val r = os.proc(TestUtil.cli, "run", "--dep", publishedDep).call(cwd = root)
+      expect(r.out.trim() == expectedMessage)
+    }
+  }
 }