65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
package file
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import (
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"io"
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"os"
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"regexp"
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"go.unistack.org/micro/v3/config"
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"golang.org/x/text/transform"
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)
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type pathKey struct{}
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func Path(path string) config.Option {
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return config.SetOption(pathKey{}, path)
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}
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func LoadPath(path string) config.LoadOption {
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return config.SetLoadOption(pathKey{}, path)
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}
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func SavePath(path string) config.SaveOption {
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return config.SetSaveOption(pathKey{}, path)
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}
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func WatchPath(path string) config.WatchOption {
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return config.SetWatchOption(pathKey{}, path)
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}
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type readerKey struct{}
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func Reader(r io.Reader) config.Option {
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return config.SetOption(readerKey{}, r)
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}
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type transformerKey struct{}
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type TransformerFunc func(src []byte, index []int) []byte
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func Transformer(t transform.Transformer) config.Option {
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return config.SetOption(transformerKey{}, t)
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}
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func NewEnvTransformer(rs string, trimLeft, trimRight int) (*EnvTransformer, error) {
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re, err := regexp.Compile(rs)
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if err != nil {
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return nil, err
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}
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return &EnvTransformer{
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Regexp: re,
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TransformerFunc: func(src []byte, index []int) []byte {
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var envKey string
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if len(src) > index[1]-trimRight {
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envKey = string(src[index[0]+trimLeft : index[1]-trimRight])
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}
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if envVal, ok := os.LookupEnv(envKey); ok {
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return []byte(envVal)
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}
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return src[index[0]:index[1]]
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},
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}, nil
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}
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