Fixed plain datasets generating lock ids when not necessary

internal/topdata/topdata_test.go

@@ -3,6 +3,7 @@ package topdata
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
@@ -13544,6 +13545,67 @@ func TestBuildNativeSupportsLoosePlainTableAtTopdataDataRoot(t *testing.T) {
 	}
 }
 
+func TestBuildNativeDoesNotCreateRootLockfileForExplicitRootPlainTable(t *testing.T) {
+	root := testProjectRoot(t)
+	mkdirAll(t, filepath.Join(root, "topdata", "data"))
+	writeFile(t, filepath.Join(root, "topdata", "base_dialog.json"), "{}\n")
+	writeFile(t, filepath.Join(root, "topdata", "data", "categories.json"), `{
+  "output": "categories.2da",
+  "columns": ["Category"],
+  "rows": [
+    {"id": 1, "key": "categories:harmful", "Category": "Harmful"},
+    {"id": 2, "key": "categories:beneficial", "Category": "Beneficial"}
+  ]
+}`+"\n")
+
+	proj := testProject(root)
+	proj.Config.TopData.ReferenceBuilder = ""
+
+	result, err := BuildNativeWithOptions(proj, NativeBuildOptions{BuildWiki: false}, nil)
+	if err != nil {
+		t.Fatalf("expected explicit loose root table to build: %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(result.Output2DADir, "categories.2da")); err != nil {
+		t.Fatalf("expected categories.2da output for loose root table: %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(root, "topdata", "data", "lock.json")); !errors.Is(err, os.ErrNotExist) {
+		t.Fatalf("expected no root lock.json for fully explicit loose root table, got err %v", err)
+	}
+}
+
+func TestBuildNativeCreatesRootLockfileForImplicitRootPlainTableKeys(t *testing.T) {
+	root := testProjectRoot(t)
+	mkdirAll(t, filepath.Join(root, "topdata", "data"))
+	writeFile(t, filepath.Join(root, "topdata", "base_dialog.json"), "{}\n")
+	writeFile(t, filepath.Join(root, "topdata", "data", "categories.json"), `{
+  "output": "categories.2da",
+  "columns": ["Category"],
+  "rows": [
+    {"key": "categories:harmful", "Category": "Harmful"},
+    {"id": 5, "key": "categories:beneficial", "Category": "Beneficial"}
+  ]
+}`+"\n")
+
+	proj := testProject(root)
+	proj.Config.TopData.ReferenceBuilder = ""
+
+	if _, err := BuildNativeWithOptions(proj, NativeBuildOptions{BuildWiki: false}, nil); err != nil {
+		t.Fatalf("expected implicit loose root table to build: %v", err)
+	}
+
+	lockRaw, err := os.ReadFile(filepath.Join(root, "topdata", "data", "lock.json"))
+	if err != nil {
+		t.Fatalf("expected root lock.json for implicit keyed row: %v", err)
+	}
+	var lockData map[string]int
+	if err := json.Unmarshal(lockRaw, &lockData); err != nil {
+		t.Fatalf("unmarshal lockfile: %v", err)
+	}
+	if lockData["categories:harmful"] != 0 || lockData["categories:beneficial"] != 5 {
+		t.Fatalf("unexpected lock data: %#v", lockData)
+	}
+}
+
 func TestBuildNativeExtendsConfiguredPlainRowsByRepeatingLastLevel(t *testing.T) {
 	root := testProjectRoot(t)
 	mkdirAll(t, filepath.Join(root, "topdata", "data", "classes", "spellsgained"))