REPORT-40472 设计器内还原到历史版本后备份的文件夹没有删除

designer-base/src/main/java/com/fr/design/update/utils/UpdateFileUtils.java

@@ -27,9 +27,26 @@ public class UpdateFileUtils {
         List<String> versions = new ArrayList<>();
         if (versionBackup != null) {
             for (File file : versionBackup) {
-                if (file.isDirectory() && file.length() > 0) {
-                    versions.add(file.getName());
-                } else {
+                boolean canBackup = true;
+                if (file.isDirectory()) {
+                    File[] libs = file.listFiles();
+                    if (libs == null || libs.length == 0) {
+                        canBackup = false;
+                    } else {
+                        for (File lib : libs) {
+                            if (lib.isDirectory()) {
+                                File[] jars = lib.listFiles();
+                                if (jars == null || jars.length == 0) {
+                                    canBackup = false;
+                                }
+                            }
+                        }
+                    }
+                    if (canBackup) {
+                        versions.add(file.getName());
+                    }
+                }
+                if (!canBackup) {
                     StableUtils.deleteFile(file);
                 }
             }

designer-base/src/test/java/com/fr/design/update/utils/UpdateFileUtilsTest.java

@@ -15,8 +15,9 @@ public class UpdateFileUtilsTest {
 
     @Test
     public void testListFilteredFiles() {
+        StableUtils.mkdirs(new File("home/backup/version/lib/jars"));
         String[] result = UpdateFileUtils.listFilteredFiles("home", "backup");
-        Assert.assertEquals(0, result.length);
-        StableUtils.deleteFile(new File(StableUtils.pathJoin("home")));
+        Assert.assertEquals(1, result.length);
+        StableUtils.deleteFile(new File("home"));
     }
 }