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Deprecate scala_legacy/MainGenericRunner/scalac -run/scalac -repl for removal #24267

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Merged
merged 2 commits into from
Oct 27, 2025
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Deprecate scala_legacy/MainGenericRunner/scalac -run/scalac -repl for removal #24267

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c2ff5d1
Update `MainGenericRunner` deprecation message for removal in 3.8.0
Gedochao Oct 27, 2025
843a6b0
Deprecate the `-run` and `-repl` command line options for removal in …
Gedochao Oct 27, 2025
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4 changes: 4 additions & 0 deletions compiler/src/dotty/tools/MainGenericCompiler.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,8 @@ object MainGenericCompiler {
case ("-q" | "-quiet") :: tail =>
process(tail, settings.withQuiet)
case "-repl" :: tail =>
Console.err.println(s"[warning] The -repl command line option has been deprecated removal in Scala 3.8.0.")
Console.err.println(s"[warning] Please use the 'scala repl' command (Scala CLI) to run the REPL.")
process(tail, settings.withCompileMode(CompileMode.Repl))
case "-script" :: targetScript :: tail =>
process(Nil, settings
Expand All @@ -114,6 +116,8 @@ object MainGenericCompiler {
case "-print-tasty" :: tail =>
process(tail, settings.withCompileMode(CompileMode.PrintTasty))
case "-run" :: tail =>
Console.err.println(s"[warning] The -run command line option has been deprecated removal in Scala 3.8.0.")
Console.err.println(s"[warning] Please use the 'scala' command (Scala CLI) instead.")
process(tail, settings.withCompileMode(CompileMode.Run))
case "-colors" :: tail =>
process(tail, settings.withColors)
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5 changes: 2 additions & 3 deletions compiler/src/dotty/tools/MainGenericRunner.scala
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Expand Up @@ -273,12 +273,11 @@ object MainGenericRunner {
val silenced = sys.props.get("scala.use_legacy_launcher") == Some("true")

if !silenced then
Console.err.println(s"[warning] MainGenericRunner class is deprecated since Scala 3.5.0, and Scala CLI features will not work.")
Console.err.println(s"[warning] Please be sure to update to the Scala CLI launcher to use the new features.")
Console.err.println(s"[warning] The MainGenericRunner class and 'legacy_scala' command have been deprecated for removal in Scala 3.8.0.")
Console.err.println(s"[warning] Please be sure to migrate to the scala command (Scala CLI).")
if ranByCoursierBootstrap then
Console.err.println(s"[warning] It appears that your Coursier-based Scala installation is misconfigured.")
Console.err.println(s"[warning] To update to the new Scala CLI runner, please update (coursier, cs) commands first before re-installing scala.")
Console.err.println(s"[warning] Check the Scala 3.5.0 release notes to troubleshoot your installation.")


run(settings) match
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