| 1 | package fsrepo |
| 2 | |
| 3 | import ( |
| 4 | "encoding/json" |
| 5 | "errors" |
| 6 | "fmt" |
| 7 | "io" |
| 8 | "os" |
| 9 | "path/filepath" |
| 10 | |
| 11 | "github.com/ipfs/kubo/config" |
| 12 | |
| 13 | "github.com/facebookgo/atomicfile" |
| 14 | ) |
| 15 | |
| 16 | // ErrNotInitialized is returned when we fail to read the config because the |
| 17 | // repo doesn't exist. |
| 18 | var ErrNotInitialized = errors.New("ipfs not initialized, please run 'ipfs init'") |
| 19 | |
| 20 | // ReadConfigFile reads the config from `filename` into `cfg`. |
| 21 | func ReadConfigFile(filename string, cfg any) error { |
| 22 | f, err := os.Open(filename) |
| 23 | if err != nil { |
| 24 | if os.IsNotExist(err) { |
| 25 | err = ErrNotInitialized |
| 26 | } |
| 27 | return err |
| 28 | } |
| 29 | defer f.Close() |
| 30 | if err := json.NewDecoder(f).Decode(cfg); err != nil { |
| 31 | return fmt.Errorf("failure to decode config: %w", err) |
| 32 | } |
| 33 | return nil |
| 34 | } |
| 35 | |
| 36 | // WriteConfigFile writes the config from `cfg` into `filename`. |
| 37 | func WriteConfigFile(filename string, cfg any) error { |
| 38 | err := os.MkdirAll(filepath.Dir(filename), 0o755) |
| 39 | if err != nil { |
| 40 | return err |
| 41 | } |
| 42 | |
| 43 | f, err := atomicfile.New(filename, 0o600) |
| 44 | if err != nil { |
| 45 | return err |
| 46 | } |
| 47 | defer f.Close() |
| 48 | |
| 49 | return encode(f, cfg) |
| 50 | } |
| 51 | |
| 52 | // encode configuration with JSON. |
| 53 | func encode(w io.Writer, value any) error { |
| 54 | // need to prettyprint, hence MarshalIndent, instead of Encoder |
| 55 | buf, err := config.Marshal(value) |
| 56 | if err != nil { |
| 57 | return err |
| 58 | } |
| 59 | _, err = w.Write(buf) |
| 60 | return err |
| 61 | } |
| 62 | |
| 63 | // Load reads given file and returns the read config, or error. |
| 64 | func Load(filename string) (*config.Config, error) { |
| 65 | var cfg config.Config |
| 66 | err := ReadConfigFile(filename, &cfg) |
| 67 | if err != nil { |
| 68 | return nil, err |
| 69 | } |
| 70 | |
| 71 | return &cfg, err |
| 72 | } |