Fix VirtualFileSystem on Windows, skip test_native_executable_venv_and_one_file

(cherry picked from commit 053b42b)

Author: otethal

graalpython/com.oracle.graal.python.test/src/tests/test_standalone.py

@@ -49,7 +49,7 @@
 
 def run_cmd(cmd, env, cwd=None):
     print(f"Executing:\n    {cmd=}\n    {env=}\n    {cwd=}")
-    process = subprocess.Popen(cmd, env=env, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True, text=True)
+    process = subprocess.Popen(cmd, env=env, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True, text=True, errors='backslashreplace')
     out = []
     for line in iter(process.stdout.readline, ""):
         print(line, end="")
@@ -170,6 +170,7 @@ def test_native_executable_one_file():
         assert "hello world, argv[1:]: " + str(cmd[1:]) in out
 
 @unittest.skipUnless(is_enabled, "ENABLE_STANDALONE_UNITTESTS is not true")
+@unittest.skipUnless(sys.platform != 'win32', 'not supported on Windows')
 def test_native_executable_venv_and_one_file():
     graalpy = get_gp()
     if graalpy is None:

graalpython/lib-graalpython/modules/standalone/templates/VirtualFileSystem.java

@@ -82,7 +82,7 @@ public final class VirtualFileSystem implements FileSystem, AutoCloseable {
     /*
      * Root of the virtual filesystem in the resources.
      */
-    private static final Path VFS_PREFIX = Path.of("/vfs");
+    private static final String VFS_PREFIX = "/vfs";
 
     /*
      * Index of all files and directories available in the resources at runtime.
@@ -194,18 +194,14 @@ public static boolean isWindows() {
         return System.getProperty("os.name").toLowerCase(Locale.ROOT).contains("windows");
     }
 
-    public String resourcePathToPlatformPath(String spath) {
-        Path path = Path.of(spath);
+    public String resourcePathToPlatformPath(String path) {
         assert path.startsWith(VFS_PREFIX);
-        Path mountPoint = this.mountPoint;
-        if (path.startsWith(VFS_PREFIX)) {
-            path = VFS_PREFIX.relativize(path);
-        }
-        String result = mountPoint.resolve(path).toString();
+	path = path.substring(VFS_PREFIX.length() + 1);
         if (!PLATFORM_SEPARATOR.equals(RESOURCE_SEPARATOR)) {
-            result = result.replace(RESOURCE_SEPARATOR, PLATFORM_SEPARATOR);
+            path = path.replace(RESOURCE_SEPARATOR, PLATFORM_SEPARATOR);
         }
-        return result;
+        Path mountPoint = this.mountPoint;
+        return mountPoint.resolve(path).toString();
     }
 
     private String platformPathToResourcePath(String path) throws IOException {