fs.meta.save: fix directory entry parent path in FullEntry construction (#7886)

* Checkpoint from VS Code for coding agent session

* Fix fs.meta.save to correctly save directory's own metadata

Co-authored-by: chrislusf <1543151+chrislusf@users.noreply.github.com>

* address error

---------

Co-authored-by: Chris Lu <chris.lu@gmail.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: chrislusf <1543151+chrislusf@users.noreply.github.com>

weed/shell/command_fs_meta_save.go

@@ -2,6 +2,8 @@ package shell
 
 import (
 	"compress/gzip"
+	"context"
+	"errors"
 	"flag"
 	"fmt"
 	"io"
@@ -146,6 +148,29 @@ func doTraverseBfsAndSaving(filerClient filer_pb.FilerClient, writer io.Writer,
 
 	var dirCount, fileCount uint64
 
+	// also save the directory itself (path) if it exists in the filer
+	if e, getErr := filer_pb.GetEntry(context.Background(), filerClient, util.FullPath(path)); getErr != nil {
+		// Entry not found is expected and can be ignored; log other errors.
+		if !errors.Is(getErr, filer_pb.ErrNotFound) {
+			fmt.Fprintf(writer, "failed to get entry %s: %v\n", path, getErr)
+		}
+	} else if e != nil {
+		parentDir, _ := util.FullPath(path).DirAndName()
+		protoMessage := &filer_pb.FullEntry{
+			Dir:   parentDir,
+			Entry: e,
+		}
+		if genErr := genFn(protoMessage, outputChan); genErr != nil {
+			fmt.Fprintf(writer, "marshall error: %v\n", genErr)
+		} else {
+			if e.IsDirectory {
+				atomic.AddUint64(&dirCount, 1)
+			} else {
+				atomic.AddUint64(&fileCount, 1)
+			}
+		}
+	}
+
 	err := filer_pb.TraverseBfs(filerClient, util.FullPath(path), func(parentPath util.FullPath, entry *filer_pb.Entry) {
 
 		if strings.HasPrefix(string(parentPath), filer.SystemLogDir) {