Fix: Don't break paths to dependencies when the repo-dir is a relative path

src/dds/library/root.cpp

 }  // namespace
 
 library_root library_root::from_directory(path_ref lib_dir) {
+    assert(lib_dir.is_absolute());
     auto sources = collect_pf_sources(lib_dir);
 
     library_manifest man;
 std::vector<library_root> dds::collect_libraries(path_ref root) {
     std::vector<library_root> ret;
     if (has_library_dirs(root)) {
-        ret.emplace_back(library_root::from_directory(root));
+        ret.emplace_back(library_root::from_directory(fs::canonical(root)));
     }
 
     auto pf_libs_dir = root / "libs";
                fs::directory_iterator(pf_libs_dir)            //
                    | ranges::views::filter(has_library_dirs)  //
                    | ranges::views::transform(
-                       [&](auto p) { return library_root::from_directory(p); }));
+                       [&](auto p) { return library_root::from_directory(fs::canonical(p)); }));
     }
     return ret;
-}
+}

tests/dds.py

                 'build',
                 f'--out={self.build_dir}',
                 f'--toolchain={toolchain or self.default_builtin_toolchain}',
-                f'--catalog={self.catalog_path}',
-                f'--repo-dir={self.repo_dir}',
+                f'--catalog={self.catalog_path.relative_to(self.source_root)}',
+                f'--repo-dir={self.repo_dir.relative_to(self.source_root)}',
                 ['--no-tests'] if not tests else [],
                 ['--no-apps'] if not apps else [],
                 ['--no-warnings'] if not warnings else [],