Merge pull request #272 from scala/backport-lts-3.3-22636

Backport "Fix scala#21242: Add REPL flag to quit after evaluating init script" to 3.3 LTS

Author: tgodzik

bin/replQ

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" >& /dev/null && pwd)/.."
+. $ROOT/bin/commonQ
+
+java -Dscala.usejavacp=true -cp $cp dotty.tools.repl.Main -usejavacp "$@"

compiler/src/dotty/tools/dotc/config/ScalaSettings.scala

@@ -135,6 +135,7 @@ trait CommonScalaSettings:
   val usejavacp: Setting[Boolean] = BooleanSetting("-usejavacp", "Utilize the java.class.path in classpath resolution.", aliases = List("--use-java-class-path"))
   val scalajs: Setting[Boolean] = BooleanSetting("-scalajs", "Compile in Scala.js mode (requires scalajs-library.jar on the classpath).", aliases = List("--scalajs"))
   val replInitScript: Setting[String] = StringSetting("-repl-init-script", "code", "The code will be run on REPL startup.", "", aliases = List("--repl-init-script"))
+  val replQuitAfterInit: Setting[Boolean] = BooleanSetting("-repl-quit-after-init", "Quit REPL after evaluating the init script.", aliases = List("--repl-quit-after-init"))
 
 end CommonScalaSettings
 

compiler/src/dotty/tools/repl/ReplDriver.scala

@@ -139,7 +139,9 @@ class ReplDriver(settings: Array[String],
    *
    *  Possible reason for unsuccessful run are raised flags in CLI like --help or --version
    */
-  final def tryRunning = if shouldStart then runUntilQuit()
+  final def tryRunning = if shouldStart then
+    if rootCtx.settings.replQuitAfterInit.value(using rootCtx) then initialState
+    else runUntilQuit()
 
   /** Run REPL with `state` until `:quit` command found
    *