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package config
import (
"fmt"
"github.com/BurntSushi/toml"
"github.com/adrg/xdg"
"os"
"os/user"
"reflect"
"strings"
)
type StorageConfig map[string]interface{}
type Config struct {
DefaultStorage string `toml:"default_storage"`
Signing struct {
Key string
}
Storage map[string]StorageConfig
}
func LoadConfig(path string) (config Config, err error) {
if path == "" {
path, err = xdg.ConfigFile("petrific/config.toml")
if err != nil {
return
}
}
_, err = toml.DecodeFile(path, &config)
return
}
// Get gets a value from the StorageConfig, taking care about type checking.
// ptr must be a pointer or this method will panic.
// ptr will only be changed, if returned error != nil
func (s StorageConfig) Get(k string, ptr interface{}) error {
ptrval := reflect.ValueOf(ptr)
if ptrval.Kind() != reflect.Ptr {
panic("ptr must be a pointer")
}
ptrelem := ptrval.Elem()
if !ptrelem.CanSet() {
panic("*ptr not settable?!")
}
v, ok := s[k]
if !ok {
return fmt.Errorf("Key '%s' is missing", k)
}
vval := reflect.ValueOf(v)
if vval.Type() != ptrelem.Type() {
return fmt.Errorf("Expected config '%s' to be of type %s, got %s", k, ptrelem.Type(), vval.Type())
}
ptrelem.Set(vval)
return nil
}
func ExpandTilde(path string) string {
home, ok := os.LookupEnv("HOME")
if !ok {
u, err := user.Current()
if err != nil {
return path
}
home = u.HomeDir
}
if home == "" {
return path
}
parts := strings.Split(path, string(os.PathSeparator))
if len(parts) > 0 && parts[0] == "~" {
parts[0] = home
}
return strings.Join(parts, string(os.PathSeparator))
}
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