com.spotify.docker.client.auth.gcr.ContainerRegistryAuthSupplier Java Examples

The following examples show how to use com.spotify.docker.client.auth.gcr.ContainerRegistryAuthSupplier. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: AbstractDockerMojo.java    From dockerfile-maven with Apache License 2.0 5 votes vote down vote up 
/**
 * Attempt to load a GCR compatible RegistryAuthSupplier based on a few conditions:
 * <ol>
 * <li>First check to see if the environemnt variable DOCKER_GOOGLE_CREDENTIALS is set and points
 * to a readable file</li>
 * <li>Otherwise check if the Google Application Default Credentials can be loaded</li>
 * </ol>
 * Note that we use a special environment variable of our own in addition to any environment
 * variable that the ADC loading uses (GOOGLE_APPLICATION_CREDENTIALS) in case there is a need for
 * the user to use the latter env var for some other purpose in their build.
 *
 * @return a GCR RegistryAuthSupplier, or null
 * @throws IOException if an IOException occurs while loading the credentials
 */
@Nullable
private RegistryAuthSupplier googleContainerRegistryAuthSupplier() throws IOException {
  GoogleCredentials credentials = null;

  final String googleCredentialsPath = System.getenv("DOCKER_GOOGLE_CREDENTIALS");
  if (googleCredentialsPath != null) {
    final File file = new File(googleCredentialsPath);
    if (file.exists()) {
      try (FileInputStream inputStream = new FileInputStream(file)) {
        credentials = GoogleCredentials.fromStream(inputStream);
        getLog().info("Using Google credentials from file: " + file.getAbsolutePath());
      }
    }
  }

  // use the ADC last
  if (credentials == null) {
    try {
      credentials = GoogleCredentials.getApplicationDefault();
      getLog().info("Using Google application default credentials");
    } catch (IOException ex) {
      // No GCP default credentials available
      getLog().debug("Failed to load Google application default credentials", ex);
    }
  }

  if (credentials == null) {
    return null;
  }

  return ContainerRegistryAuthSupplier.forCredentials(credentials).build();
}