Handle Windows path seps in DepsTrackingReporter

Author: crt-31

scala/private/phases/phase_write_executable.bzl

@@ -85,12 +85,16 @@ def _write_executable_windows(ctx, executable, rjars, main_class, jvm_flags, wra
     cpfile = ctx.actions.declare_file("%s.classpath" % ctx.label.name)
     ctx.actions.write(cpfile, classpath)
 
+    specifiedEnv = {}
+    if hasattr(ctx.attr, "env"):
+        specifiedEnv = ctx.attr.env
+
     ctx.actions.run(
         outputs = [executable],
         inputs = [cpfile],
         executable = ctx.attr._exe.files_to_run.executable,
         arguments = [executable.path, ctx.workspace_name, java_for_exe, main_class, cpfile.path, jvm_flags_str],
-        env = ctx.attr.env,
+        env = specifiedEnv,
         mnemonic = "ExeLauncher",
         progress_message = "Creating exe launcher",
     )

src/java/io/bazel/rulesscala/scalac/reporter/DepsTrackingReporter.java

@@ -17,6 +17,9 @@
 import java.util.Set;
 import java.util.jar.JarFile;
 import java.util.stream.Collectors;
+
+import javax.print.attribute.standard.Severity;
+
 import scala.reflect.internal.util.NoPosition$;
 import scala.reflect.internal.util.Position;
 import scala.tools.nsc.Settings;
@@ -91,6 +94,9 @@ public void info0(Position pos, String msg, Severity severity, boolean force) {
   private void parseOpenedJar(String msg) {
     String jar = msg.split(":")[1];
 
+    //normalize path separators (scalac passes os-specific path separators.)
+    jar = jar.replace("\\", "/");
+
     // track only jars from dependency targets
     // this should exclude things like rt.jar which come from JDK
     if (jarToTarget.containsKey(jar) || indirectJarToTarget.containsKey(jar)) {