94 lines
1.8 KiB
Go
94 lines
1.8 KiB
Go
package config
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import (
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"fmt"
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"strings"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/config"
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"github.com/spf13/viper"
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)
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// Config represents a group of named values structured
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// by tree type.
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//
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// Sub-trees are named configuration sub-sections,
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// leaves are named configuration values.
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// Names are of string type.
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type Config struct {
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v *viper.Viper
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opts opts
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defaultPath []string
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path []string
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}
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const (
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separator = "."
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// EnvPrefix is a prefix of ENV variables related
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// to storage node configuration.
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EnvPrefix = "FROSTFS"
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// EnvSeparator is a section separator in ENV variables.
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EnvSeparator = "_"
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)
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// Prm groups required parameters of the Config.
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type Prm struct{}
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// New creates a new Config instance.
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//
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// If file option is provided (WithConfigFile),
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// configuration values are read from it.
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// Otherwise, Config is a degenerate tree.
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func New(_ Prm, opts ...Option) *Config {
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v := viper.New()
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v.SetEnvPrefix(EnvPrefix)
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v.AutomaticEnv()
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v.SetEnvKeyReplacer(strings.NewReplacer(separator, EnvSeparator))
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o := defaultOpts()
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for i := range opts {
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opts[i](o)
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}
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if o.path != "" {
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v.SetConfigFile(o.path)
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err := v.ReadInConfig()
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if err != nil {
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panic(fmt.Errorf("failed to read config: %w", err))
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}
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}
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if o.configDir != "" {
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if err := config.ReadConfigDir(v, o.configDir); err != nil {
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panic(fmt.Errorf("failed to read config dir: %w", err))
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}
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}
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return &Config{
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v: v,
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opts: *o,
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}
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}
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// Reload reads configuration path if it was provided to New.
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func (x *Config) Reload() error {
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if x.opts.path != "" {
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err := x.v.ReadInConfig()
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if err != nil {
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return fmt.Errorf("rereading configuration file: %w", err)
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}
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}
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if x.opts.configDir != "" {
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if err := config.ReadConfigDir(x.v, x.opts.configDir); err != nil {
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return fmt.Errorf("rereading configuration dir: %w", err)
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}
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}
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return nil
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}
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