import org.apache.maven.scm.manager.NoSuchScmProviderException; //导入依赖的package包/类
/**
 * Load user name password from settings if user has not set them via JVM
 * properties.
 *
 * @return the connection information to connect to the SCM system.
 * @throws IllegalStateException if the connection string to the SCM cannot be
 *           fetched.
 * @throws ScmRepositoryException if the repository information is not
 *           sufficient to build the repository instance.
 * @throws NoSuchScmProviderException if there is no provider for the SCM
 *           connection URL.
 */
private ScmConnectionInfo loadConnectionInfo() throws IllegalStateException,
  ScmRepositoryException, NoSuchScmProviderException
{
  final String scmConnection = getConnection();
  final ScmCredentials credentials = scmInfo.getScmCrendentials();
  if (credentials.getUserName() == null || credentials.getPassword() == null)
  {
    final ScmRepository repository =
        scmInfo.getScmManager().makeScmRepository(scmConnection);
    if (repository.getProviderRepository() instanceof ScmProviderRepositoryWithHost)
    {
      final ScmProviderRepositoryWithHost repositoryWithHost =
          (ScmProviderRepositoryWithHost) repository.getProviderRepository();
      final String host = createHostName(repositoryWithHost);
      credentials.configureByServer(host);
    }
  }

  final ScmConnectionInfo info = new ScmConnectionInfo();
  info.setUserName(credentials.getUserName());
  info.setPassword(credentials.getPassword());
  info.setPrivateKey(credentials.getPrivateKey());
  info.setScmConnectionUrl(scmConnection);
  info.setTagBase(scmInfo.getTagBase());
  info.setRemoteVersion(scmInfo.getRemoteVersion());
  return info;
}
 

import org.apache.maven.scm.manager.NoSuchScmProviderException; //导入依赖的package包/类
/**
 * Creates the provider instance to access the given repository.
 *
 * @param repository the repository to access with the provider to be created.
 * @return the provider to access the given repository.
 * @throws ScmException if the provider cannot be created.
 */
private ScmProvider createScmProvider(final ScmRepository repository)
  throws ScmException
{
  try
  {
    final ScmProvider provider =
        scmManager.getProviderByRepository(repository);
    return provider;
  }
  catch (final NoSuchScmProviderException e)
  {
    throw new ScmException("Cannot create SCM provider.", e);
  }
}