text: package transactional
  
  import "github.com/go-git/go-git/v5/config"
  
  // ConfigStorage implements the storer.ConfigStorage for the transactional package.
  type ConfigStorage struct {
  	config.ConfigStorer
  	temporal config.ConfigStorer
  
  	set bool
  }
  
  // NewConfigStorage returns a new ConfigStorer based on a base storer and a
  // temporal storer.
  func NewConfigStorage(s, temporal config.ConfigStorer) *ConfigStorage {
  	return &ConfigStorage{ConfigStorer: s, temporal: temporal}
  }
  
  // SetConfig honors the storer.ConfigStorer interface.
  func (c *ConfigStorage) SetConfig(cfg *config.Config) error {
  	if err := c.temporal.SetConfig(cfg); err != nil {
  		return err
  	}
  
  	c.set = true
  	return nil
  }
  
  // Config honors the storer.ConfigStorer interface.
  func (c *ConfigStorage) Config() (*config.Config, error) {
  	if !c.set {
  		return c.ConfigStorer.Config()
  	}
  
  	return c.temporal.Config()
  }
  
  // Commit it copies the config from the temporal storage into the base storage.
  func (c *ConfigStorage) Commit() error {
  	if !c.set {
  		return nil
  	}
  
  	cfg, err := c.temporal.Config()
  	if err != nil {
  		return err
  	}
  
  	return c.ConfigStorer.SetConfig(cfg)
  }
  