package initialize import ( "fmt" "log" "strings" "github.com/coreos/coreos-cloudinit/system" ) func ParseUserData(contents string) (interface{}, error) { if len(contents) == 0 { return nil, nil } header := strings.SplitN(contents, "\n", 2)[0] // Explicitly trim the header so we can handle user-data from // non-unix operating systems. The rest of the file is parsed // by yaml, which correctly handles CRLF. header = strings.TrimSpace(header) if strings.HasPrefix(header, "#!") { log.Printf("Parsing user-data as script") return system.Script(contents), nil } else if header == "#cloud-config" { log.Printf("Parsing user-data as cloud-config") return NewCloudConfig(contents) } else { return nil, fmt.Errorf("Unrecognized user-data header: %s", header) } }