Added the ability to run a silent startup script

src/main/scala/com/potenciasoftware/rebel/BaseRepl.scala

@@ -69,12 +69,19 @@ class BaseRepl {
         field
       }
 
+  /**
+   * Override to provide a script to run on startup.
+   *
+   * This can be a multiline string. No output will be shown from this script.
+   */
+  protected def startupScript: String = ""
+
   /** Read the current text of the REPL prompt. */
   def prompt: String = repl.prompt
 
   /** Change the current text of the REPL prompt. */
   def prompt_=(newValue: String): Unit = {
-    promptField.foreach { field =>
+    promptField foreach { field =>
       field.set(repl, newValue)
     }
   }
@@ -91,6 +98,9 @@ class BaseRepl {
       intp.beQuietDuring {
         for (param <- boundValues)
           param.bindTo(intp)
+
+        if (startupScript.nonEmpty)
+          intp.interpret(startupScript)
       }
     }
   }

src/test/scala/com/potenciasoftware/rebel/BaseReplTest.scala

@@ -1,5 +1,6 @@
 package com.potenciasoftware.rebel
 
+import org.scalatest.Tag
 import org.scalatest.flatspec.AnyFlatSpec
 import org.scalatest.matchers.should.Matchers
 
@@ -17,9 +18,8 @@ class BaseReplTest extends AnyFlatSpec with Matchers {
 
   "BaseRepl" should "behave like the normal ILoop by default" in {
     replTest[BaseReplTest]("basic", "42 + 42")
-      .out.asBlock shouldBe """
-      |scala> val res0: Int = 84
-      |
+      .out.compressed.asBlock shouldBe
+      """scala> val res0: Int = 84
       |scala> """.stripMargin
   }
 
@@ -89,16 +89,40 @@ class BaseReplTest extends AnyFlatSpec with Matchers {
   }
 
   it should "use the full classpath" in {
-    replTest[BaseReplTest]("fullClasspath",
+    replTest[BaseReplTest]("basic",
       "import com.potenciasoftware.rebel.BaseReplTest.TestValue",
       "val value = TestValue(42)",
       "println(value)"
-    ).all.printAll
+    ).out.compressed.take(3).asBlock shouldBe
+    """scala> import com.potenciasoftware.rebel.BaseReplTest.TestValue
+    |scala> val value = TestValue(42)val value: com.potenciasoftware.rebel.BaseReplTest.TestValue = TestValue(42)
+    |scala> println(value)TestValue(42)""".stripMargin
+  }
+
+  def startupScript() = new TestRepl {
+    override protected def startupScript: String =
+      """
+      |object printAnswer {
+      |
+      |  private val answer = 42
+      |
+      |  def apply(): Unit =
+      |    println(s"The answer is: $answer")
+      |}""".stripMargin
+  }
+
+  it should "allow a silent script to run at startup" in {
+    replTest[BaseReplTest]("startupScript",
+      "printAnswer()").out.take(2).asBlock shouldBe
+        """
+        |scala> printAnswer()The answer is: 42""".stripMargin
   }
 }
 
 object BaseReplTest {
 
+  object Focus extends Tag("Focus")
+
   class TestRepl extends BaseRepl {
     // Normally we don't need the banner as part of our test outupt
     override protected val banner: String = ""

src/test/scala/com/potenciasoftware/rebel/TestUtils.scala

@@ -107,6 +107,9 @@ object TestUtils {
 
     def printAll: Unit = s.foreach(println)
 
+    def compressed: Seq[String] =
+      s.filterNot(_.isEmpty)
+
     def withLineNumbers: Seq[String] = {
       val padTo = (s.size - 1).toString.size
       for {