frostfs-node/cmd/neofs-node/config/calls.go
Elizaveta Chichindaeva cc7a723d77 [] English Check
Signed-off-by: Elizaveta Chichindaeva <elizaveta@nspcc.ru>
2022-05-11 10:40:02 +03:00

55 lines
1.3 KiB
Go

package config
import (
"strings"
)
// Sub returns a subsection of the Config by name.
//
// Returns nil if subsection is missing.
func (x *Config) Sub(name string) *Config {
// copy path in order to prevent consequent violations
ln := len(x.path)
path := make([]string, ln, ln+1)
copy(path, x.path)
var defaultPath []string
if x.defaultPath != nil {
ln := len(x.defaultPath)
defaultPath = make([]string, ln, ln+1)
copy(defaultPath, x.defaultPath)
}
return &Config{
v: x.v,
path: append(path, name),
defaultPath: append(defaultPath, name),
}
}
// Value returns the configuration value by name.
//
// Result can be casted to a particular type
// via corresponding function (e.g. StringSlice).
// Note: casting via Go `.()` operator is not
// recommended.
//
// Returns nil if config is nil.
func (x *Config) Value(name string) interface{} {
value := x.v.Get(strings.Join(append(x.path, name), separator))
if value != nil || x.defaultPath == nil {
return value
}
return x.v.Get(strings.Join(append(x.defaultPath, name), separator))
}
// SetDefault sets fallback config for missing values.
//
// It supports only one level of nesting and is intended to be used
// to provide default values.
func (x *Config) SetDefault(from *Config) {
x.defaultPath = make([]string, len(from.path))
copy(x.defaultPath, from.path)
}