Fix verbatim prefix handling (#30)

Junction creation now correctly handles paths with Windows verbatim
prefix (\\?\). The prefix is stripped before constructing the reparse
point data, preventing double-prefix corruption.

Author: DK26

src/internals.rs

@@ -29,6 +29,9 @@ pub fn create(target: &Path, junction: &Path) -> io::Result<()> {
     // For example, forward slashes cannot be used as a path separator, so we should try to
     // canonicalize the path first.
     let target = helpers::get_full_path(target)?;
+    // Strip Win32 verbatim prefix (\\?\) if present - we add NT prefix (\??\) ourselves
+    const VERBATIM_PREFIX: [u16; 4] = helpers::utf16s(br"\\?\");
+    let target = target.strip_prefix(VERBATIM_PREFIX.as_slice()).unwrap_or(&target);
     fs::create_dir(junction)?;
     let file = helpers::open_reparse_point(junction, true)?;
     let target_len_in_bytes = {

src/tests.rs

@@ -257,10 +257,11 @@ fn create_with_verbatim_prefix_paths() {
     fs::create_dir_all(&link_parent).unwrap();
 
     // std::fs::canonicalize() returns paths with \\?\ verbatim prefix on Windows
-    let target = fs::canonicalize(&target).unwrap();
+    let target_canonical = fs::canonicalize(&target).unwrap();
     let junction = fs::canonicalize(&link_parent).unwrap().join("junction");
 
-    super::create(&target, &junction).unwrap();
+    super::create(&target_canonical, &junction).unwrap();
     assert!(super::exists(&junction).unwrap(), "junction should exist");
+    // get_target returns path without verbatim prefix
     assert_eq!(super::get_target(&junction).unwrap(), target);
 }