Index: vault-sync/src/main/java/org/apache/jackrabbit/vault/sync/impl/TreeSync.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/vault-sync/src/main/java/org/apache/jackrabbit/vault/sync/impl/TreeSync.java b/vault-sync/src/main/java/org/apache/jackrabbit/vault/sync/impl/TreeSync.java
--- a/vault-sync/src/main/java/org/apache/jackrabbit/vault/sync/impl/TreeSync.java	(revision 415a858cc5816f58b8010172360a69703e58b953)
+++ b/vault-sync/src/main/java/org/apache/jackrabbit/vault/sync/impl/TreeSync.java	(date 1649261154881)
@@ -77,6 +77,8 @@
 
     private final WorkspaceFilter wspFilter;
 
+    private boolean allowMixinNodes = false;
+
     // currently hard coded
     private final String[] FULL_COVERAGE_NTS = {
             "rep:AccessControl",
@@ -103,6 +105,10 @@
         this.preserveFileDate = preserveFileDate;
     }
 
+    public void setAllowMixinNodesFiles(boolean allowMixinNodes) {
+        this.allowMixinNodes = allowMixinNodes;
+    }
+
     public SyncResult sync(Node node, File dir) throws RepositoryException, IOException {
         SyncResult result = new SyncResult();
         sync(result, node, dir);
@@ -144,14 +150,18 @@
         if (node == null) {
             return Type.MISSING;
         } else if (node.isNodeType(NodeType.NT_FILE)) {
-            if (node.getMixinNodeTypes().length == 0) {
-                // only ok, if pure nt:file
-                Node content = node.getNode(Node.JCR_CONTENT);
-                if (content.isNodeType(NodeType.NT_RESOURCE) && content.getMixinNodeTypes().length == 0) {
-                    return Type.FILE;
-                }
-            }
-            return Type.UNSUPPORTED;
+            if (allowMixinNodes) { // Force to sync mixin nodes, use carefully
+                return Type.FILE;
+            } else {
+                if (node.getMixinNodeTypes().length == 0) {
+                    // only ok, if pure nt:file
+                    Node content = node.getNode(Node.JCR_CONTENT);
+                    if (content.isNodeType(NodeType.NT_RESOURCE) && content.getMixinNodeTypes().length == 0) {
+                        return Type.FILE;
+                    }
+                }
+                return Type.UNSUPPORTED;
+            }
         }
         for (String nt: FULL_COVERAGE_NTS) {
             try {
@@ -377,21 +387,28 @@
     }
 
     private void writeFile(SyncResult res, Entry e) throws IOException, RepositoryException {
-        String action = e.file.exists() ? "U" : "A";
+        File entryFile = e.file;
+        String action = entryFile.exists() ? "U" : "A";
         Binary bin = null;
         InputStream in = null;
         OutputStream out = null;
         try {
-            bin = e.node.getProperty("jcr:content/jcr:data").getBinary();
-            in = bin.getStream();
-            out = FileUtils.openOutputStream(e.file);
-            IOUtils.copy(in, out);
-            if (preserveFileDate) {
-                Calendar lastModified = e.node.getProperty("jcr:content/jcr:lastModified").getDate();
-                e.file.setLastModified(lastModified.getTimeInMillis());
-            }
-            syncLog.log("%s file://%s", action, e.file.getAbsolutePath());
-            res.addEntry(e.getJcrPath(), e.getFsPath(), SyncResult.Operation.UPDATE_FS);
+            long entryNodeLastModifiedDate = getEntryLastModified(e);
+
+            if (entryFile.lastModified() != entryNodeLastModifiedDate) {
+                bin = e.node.getProperty("jcr:content/jcr:data").getBinary();
+                in = bin.getStream();
+                out = FileUtils.openOutputStream(entryFile);
+                IOUtils.copy(in, out);
+
+                if (preserveFileDate && entryNodeLastModifiedDate != 0) {
+                    Calendar lastModified = e.node.getProperty("jcr:content/jcr:lastModified").getDate();
+                    entryFile.setLastModified(lastModified.getTimeInMillis());
+                }
+
+                syncLog.log("%s file://%s", action, entryFile.getAbsolutePath());
+                res.addEntry(e.getJcrPath(), e.getFsPath(), SyncResult.Operation.UPDATE_FS);
+            }
         } finally {
             IOUtils.closeQuietly(in);
             IOUtils.closeQuietly(out);
@@ -401,6 +418,16 @@
         }
     }
 
+    private long getEntryLastModified(Entry e) throws RepositoryException {
+        Property entryLastModifiedProperty = e.node.getProperty("jcr:content/jcr:lastModified");
+
+        if (entryLastModifiedProperty  != null && entryLastModifiedProperty.getDate() != null) {
+            return entryLastModifiedProperty.getDate().getTimeInMillis();
+        }
+
+        return 0;
+    }
+
     private void writeNtFile(SyncResult res, Entry e) throws RepositoryException, IOException {
         Node ntFile = e.node;
         Node content;