Track active symlink expansions precisely

facade_import_root_test.go

@@ -50,3 +50,32 @@ func TestFacadeNativeDiscoveryWithNestedRoot(t *testing.T) {
 		}
 	}
 }
+
+func TestFacadeDiscoveryAllowsFiniteLinkReuse(t *testing.T) {
+	root := t.TempDir()
+	if err := os.Mkdir(filepath.Join(root, "parts"), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(root, "parts/value.yml"), []byte("value: 1\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Symlink("..", filepath.Join(root, "parts/up")); err != nil {
+		t.Skipf("symlinks unavailable: %v", err)
+	}
+	filesystem := configkit.NewFilesystem("finite", os.DirFS(root))
+	for _, native := range []bool{false, true} {
+		for _, selector := range []string{"dir: parts/up/parts/up/parts\n      pattern: '*.yml'", "glob: 'parts/up/parts/up/parts/*.yml'"} {
+			context := &configkit.FilesystemContext{Root: root, BaseDir: root}
+			if native {
+				context = &configkit.FilesystemContext{FS: &filesystem, Root: ".", BaseDir: "."}
+			}
+			result, err := configkit.Load(configkit.Bytes("main", []byte("configkit:\n  imports:\n    - "+selector+"\n")), configkit.Options[map[string]any]{Imports: true, Filesystem: context})
+			if err != nil {
+				t.Fatalf("native=%v selector=%s: %v", native, selector, err)
+			}
+			if result.Config["value"] != int64(1) {
+				t.Fatalf("configuration = %#v", result.Config)
+			}
+		}
+	}
+}