Function getAuth

cli/command/registry/search.go:96–116

getAuth will use fetch auth based on the given search-term. If the search does not contain a hostname for the registry, it assumes Docker Hub is used, and resolves authentication for Docker Hub, otherwise it resolves authentication for the given registry.

(dockerCLI command.Cli, reposName string)

// and resolves authentication for Docker Hub, otherwise it resolves authentication
// for the given registry.
func getAuth(dockerCLI command.Cli, reposName string) (encodedAuth string, err error) {
	authCfgKey := splitReposSearchTerm(reposName)
	if authCfgKey == "docker.io" || authCfgKey == "index.docker.io" {
		authCfgKey = authConfigKey
	}

	// Ignoring errors here, which was the existing behavior (likely
	// "no credentials found"). We'll get an error when search failed,
	// so fine to ignore in most situations.
	authConfig, _ := dockerCLI.ConfigFile().GetAuthConfig(authCfgKey)
	return authconfig.Encode(registrytypes.AuthConfig{
		Username:      authConfig.Username,
		Password:      authConfig.Password,
		ServerAddress: authConfig.ServerAddress,

		// TODO(thaJeztah): Are these expected to be included?
		Auth:          authConfig.Auth,
		IdentityToken: authConfig.IdentityToken,
		RegistryToken: authConfig.RegistryToken,
	})
}

// splitReposSearchTerm breaks a search term into an index name and remote name
func splitReposSearchTerm(reposName string) string {