config.go

package config

import (
  "strings"
  "os"
  "os/user"
)

type Identity struct {
  PeerId string
}

type Datastore struct {
  Type string
  Path string
}

type Config struct {
  Identity Identity
  Datastore Datastore
}


var defaultConfigFilePath = "~/.go-ipfs/config"
var defaultConfigFile = `{
  "identity": {},
  "datastore": {
    "type": "leveldb",
    "path": "~/.go-ipfs/datastore"
  }
}
`

func LoadConfig(filename string) (*Config, error) {
  if len(filename) == 0 {
    filename = defaultConfigFilePath
  }

  // expand ~/
  if strings.HasPrefix(filename, "~/") {
    usr, err := user.Current()
    if err != nil {
      return nil, err
    }

    dir := usr.HomeDir + "/"
    filename = strings.Replace(filename, "~/", dir, 1)
  }

  // if nothing is there, write first conifg file.
  if _, err := os.Stat(filename); os.IsNotExist(err) {
    WriteFile(filename, []byte(defaultConfigFile))
  }

  var cfg Config
  err := ReadConfigFile(filename, &cfg)
  if err != nil {
    return nil, err
  }

  return &cfg, err
}