package gs import ( "os" "path" "strings" "github.com/restic/restic/internal/backend" "github.com/restic/restic/internal/errors" "github.com/restic/restic/internal/options" ) // Config contains all configuration necessary to connect to a Google Cloud Storage // bucket. We use Google's default application credentials to acquire an access token, so // we don't require that calling code supply any authentication material here. type Config struct { ProjectID string Bucket string Prefix string Connections uint `option:"connections" help:"set a limit for the number of concurrent connections (default: 5)"` Region string `option:"region" help:"region to create the bucket in (default: us)"` } // NewConfig returns a new Config with the default values filled in. func NewConfig() Config { return Config{ Connections: 5, Region: "us", } } func init() { options.Register("gs", Config{}) } // ParseConfig parses the string s and extracts the gcs config. The // supported configuration format is gs:bucketName:/[prefix]. func ParseConfig(s string) (*Config, error) { if !strings.HasPrefix(s, "gs:") { return nil, errors.New("gs: invalid format") } // strip prefix "gs:" s = s[3:] // use the first entry of the path as the bucket name and the // remainder as prefix bucket, prefix, colon := strings.Cut(s, ":") if !colon { return nil, errors.New("gs: invalid format: bucket name or path not found") } prefix = strings.TrimPrefix(path.Clean(prefix), "/") cfg := NewConfig() cfg.Bucket = bucket cfg.Prefix = prefix return &cfg, nil } var _ backend.ApplyEnvironmenter = &Config{} // ApplyEnvironment saves values from the environment to the config. func (cfg *Config) ApplyEnvironment(prefix string) { if cfg.ProjectID == "" { cfg.ProjectID = os.Getenv(prefix + "GOOGLE_PROJECT_ID") } }