GcloudConfig returns a GcloudConfigData object or an error of type *GcloudError.

SemanticVersion returns the version of the proxy in a semver format.

SplitName splits a fully qualified instance into its project, region, and instance name components.

UserAgentFromVersionString returns an appropriate user agent string for identifying this proxy process.

generic execution failure error not specified above.

GcloudConfigData represents the data returned by `gcloud config config-helper`.