shell: add fs.mv

fix https://github.com/chrislusf/seaweedfs/issues/954

weed/server/filer_grpc_server_rename.go

@@ -96,6 +96,11 @@ func (fs *FilerServer) moveSelfEntry(ctx context.Context, oldParent filer2.FullP
 
 	glog.V(1).Infof("moving entry %s => %s", oldPath, newPath)
 
+	if oldPath == newPath {
+		glog.V(1).Infof("skip moving entry %s => %s", oldPath, newPath)
+		return nil
+	}
+
 	// add to new directory
 	newEntry := &filer2.Entry{
 		FullPath: newPath,

weed/shell/command_fs_mv.go

@@ -0,0 +1,96 @@
+package shell
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"path/filepath"
+
+	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+)
+
+func init() {
+	Commands = append(Commands, &commandFsMv{})
+}
+
+type commandFsMv struct {
+}
+
+func (c *commandFsMv) Name() string {
+	return "fs.mv"
+}
+
+func (c *commandFsMv) Help() string {
+	return `move or rename a file or a folder
+
+	fs.mv  <source entry> <destination entry> 
+
+	fs.mv /dir/file_name /dir2/filename2
+	fs.mv /dir/file_name /dir2
+
+	fs.mv /dir/dir2 /dir3/dir4/
+	fs.mv /dir/dir2 /dir3/new_dir
+
+`
+}
+
+func (c *commandFsMv) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+
+	filerServer, filerPort, sourcePath, err := commandEnv.parseUrl(args[0])
+	if err != nil {
+		return err
+	}
+
+	_, _, destinationPath, err := commandEnv.parseUrl(args[1])
+	if err != nil {
+		return err
+	}
+
+	ctx := context.Background()
+
+
+	sourceDir, sourceName := filer2.FullPath(sourcePath).DirAndName()
+
+	destinationDir, destinationName := filer2.FullPath(destinationPath).DirAndName()
+
+
+	return commandEnv.withFilerClient(ctx, filerServer, filerPort, func(client filer_pb.SeaweedFilerClient) error {
+
+		// collect destination entry info
+		destinationRequest := &filer_pb.LookupDirectoryEntryRequest{
+			Name:      destinationDir,
+			Directory: destinationName,
+		}
+		respDestinationLookupEntry, err := client.LookupDirectoryEntry(ctx, destinationRequest)
+
+		var targetDir, targetName string
+
+		// moving a file or folder
+		if err == nil && respDestinationLookupEntry.Entry.IsDirectory {
+			// to a directory
+			targetDir = filepath.ToSlash(filepath.Join(destinationDir, destinationName))
+			targetName = sourceName
+		} else {
+			// to a file or folder
+			targetDir = destinationDir
+			targetName = destinationName
+		}
+
+
+		request := &filer_pb.AtomicRenameEntryRequest{
+			OldDirectory: sourceDir,
+			OldName:      sourceName,
+			NewDirectory: targetDir,
+			NewName:      targetName,
+		}
+
+		_, err = client.AtomicRenameEntry(ctx, request)
+
+		fmt.Fprintf(writer, "move: %s => %s\n", sourcePath, filer2.NewFullPath(targetDir, targetName))
+
+		return err
+
+	})
+
+}