Support recursive directory uploads

internal/baidu/files.go

@@ -66,6 +66,38 @@ func (c *Client) Mkdir(ctx context.Context, name string) (File, error) {
 	return result, nil
 }
 
+func (c *Client) MkdirAll(ctx context.Context, name string) error {
+	target := path.Clean("/" + strings.TrimPrefix(name, "/"))
+	if target == "/" {
+		return nil
+	}
+	current := "/"
+	for _, component := range strings.Split(strings.TrimPrefix(target, "/"), "/") {
+		current = path.Join(current, component)
+		if err := c.EnsureDirectory(ctx, current); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (c *Client) EnsureDirectory(ctx context.Context, name string) error {
+	entry, err := c.Stat(ctx, name)
+	if err == nil {
+		if !entry.IsDirectory() {
+			return fmt.Errorf("remote path exists and is not a directory: %s", name)
+		}
+		return nil
+	}
+	if !errors.Is(err, ErrNotFound) {
+		return fmt.Errorf("check remote directory %s: %w", name, err)
+	}
+	if _, err := c.Mkdir(ctx, name); err != nil {
+		return fmt.Errorf("create remote directory %s: %w", name, err)
+	}
+	return nil
+}
+
 func (c *Client) Delete(ctx context.Context, name string) error {
 	remote := c.RemotePath(name)
 	if remote == c.root {