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[#877] neofs-node/config: allow to provide default values

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In case we have multiple sections with similar structure (e.g. shards)
having defaults in a single place is easier to work with.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
This commit is contained in:
Evgenii Stratonikov 2021-10-18 16:36:56 +03:00 • committed by Alex Vanin
parent 118c3b3cfe
commit cb9bf00ceb
5 changed files with 78 additions and 4 deletions
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29
cmd/neofs-node/config/calls.go
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@ -15,9 +15,19 @@ func (x *Config) Sub(name string) *Config {
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)
}
copy(path, x.path)
return &Config{
v: x.v,
path: append(path, name),
v: x.v,
path: append(path, name),
defaultPath: append(defaultPath, name),
}
}
@ -30,5 +40,18 @@ func (x *Config) Sub(name string) *Config {
//
// Returns nil if config is nil.
func (x *Config) Value(name string) interface{} {
return x.v.Get(strings.Join(append(x.path, name), separator))
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)
}