Enable scripting tests

Author: BarkingBad

compiler/src/dotty/tools/MainGenericRunner.scala

@@ -157,7 +157,7 @@ object MainGenericRunner {
         process(tail, newSettings.withResidualArgs(arg))
 
   def main(args: Array[String]): Unit =
-    val scalaOpts = envOrNone("SCALA_OPTS").toArray.flatMap(_.split(" "))
+    val scalaOpts = envOrNone("SCALA_OPTS").toArray.flatMap(_.split(" ")).filter(_.nonEmpty)
     val allArgs = scalaOpts ++ args
     val settings = process(allArgs.toList, Settings())
     if settings.exitCode != 0 then System.exit(settings.exitCode)

compiler/test-resources/scripting/classpathReport.sc

@@ -1,4 +1,4 @@
-#!dist/target/pack/bin/scala -classpath dist/target/pack/lib/*
+#!/usr/bin/env -S bin/scala -classpath 'dist/target/pack/lib/*'
 
 import java.nio.file.Paths
 

compiler/test-resources/scripting/unglobClasspath.sc

@@ -1,4 +1,4 @@
-#!bin/scala -classpath 'dist/target/pack/lib/*'
+#!/usr/bin/env -S bin/scala -classpath 'dist/target/pack/lib/*'
 
 // won't compile unless the hashbang line sets classpath
 import org.jline.terminal.Terminal

compiler/test/dotty/tools/repl/EnvPropsTest.scala

@@ -41,15 +41,15 @@ class ClasspathTests:
 
       cmd.foreach { printf("[%s]\n", _) }
 
-      // test script reports the classpath it sees 
+      // test script reports the classpath it sees
       val scriptOutput = exec(cmd:_*)
       val scriptCwd = findTaggedLine("cwd", scriptOutput)
       printf("script ran in directory [%s]\n", scriptCwd)
       val scriptCp = findTaggedLine("classpath", scriptOutput)
 
       val hashbangClasspathJars = scriptCp.split(psep).map { _.getName }.sorted.distinct
       val packlibJars = listJars(s"$scriptCwd/$packLibDir").sorted.distinct
-     
+
       printf("%d jar files in dist/target/pack/lib\n", packlibJars.size)
       printf("%d test script jars in classpath\n", hashbangClasspathJars.size)
 
@@ -78,7 +78,7 @@ class ClasspathTests:
 
       cmd.foreach { printf("[%s]\n", _) }
 
-      // test script reports the classpath it sees 
+      // test script reports the classpath it sees
       val scriptOutput = exec(cmd:_*)
       val scriptCp = findTaggedLine("unglobbed classpath", scriptOutput)
       val classpathJars = scriptCp.split(psep).map { _.getName }.sorted.distinct