forked from ebhomengo/niki
50 lines
1.3 KiB
Go
50 lines
1.3 KiB
Go
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// Package structs implements a koanf.Provider that takes a struct and tag
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// and returns a nested config map (using fatih/structs) to provide it to koanf.
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package structs
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import (
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"errors"
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"github.com/fatih/structs"
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"github.com/knadh/koanf/maps"
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)
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// Structs implements a structs provider.
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type Structs struct {
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s interface{}
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tag string
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delim string
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}
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// Provider returns a provider that takes a takes a struct and a struct tag
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// and uses structs to parse and provide it to koanf.
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func Provider(s interface{}, tag string) *Structs {
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return &Structs{s: s, tag: tag}
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}
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// ProviderWithDelim returns a provider that takes a takes a struct and a struct tag
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// along with a delim and uses structs to parse and provide it to koanf.
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func ProviderWithDelim(s interface{}, tag, delim string) *Structs {
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return &Structs{s: s, tag: tag, delim: delim}
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}
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// ReadBytes is not supported by the structs provider.
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func (s *Structs) ReadBytes() ([]byte, error) {
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return nil, errors.New("structs provider does not support this method")
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}
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// Read reads the struct and returns a nested config map.
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func (s *Structs) Read() (map[string]interface{}, error) {
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ns := structs.New(s.s)
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ns.TagName = s.tag
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out := ns.Map()
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if s.delim != "" {
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out = maps.Unflatten(out, s.delim)
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}
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return out, nil
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}
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