Fix windows CI

Author: BarkingBad

.github/workflows/ci.yaml

@@ -181,7 +181,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Test
-        run: sbt ";scala3-bootstrapped/compile ;scala3-bootstrapped/test"
+        run: sbt ";dist/pack ;scala3-bootstrapped/compile ;scala3-bootstrapped/test"
         shell: cmd
 
       - name: Scala.js Test

compiler/test/dotty/tools/scripting/ClasspathTests.scala

@@ -31,7 +31,10 @@ class ClasspathTests:
       case None => sys.error(s"test script not found: ${testScriptName}")
       case Some(file) => file
 
-    val relpath = testScript.toPath.relpath.norm
+    val relpath = Some(testScript.toPath.relpath.norm).map {
+      case s if cygwin => s"$$(cygpath -aw $s)"
+      case s => s
+    }
     printf("===> hashbangClasspathVerifyTest for script [%s]\n", relpath)
     printf("bash is [%s]\n", bashExe)