35 lines
569 B
Go
35 lines
569 B
Go
package kvflag
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import (
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"encoding/json"
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"fmt"
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"os"
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)
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// FlagJSON is a flag.Value implementation for parsing user variables
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// from the command-line using JSON files.
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type FlagJSON map[string]string
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func (v *FlagJSON) String() string {
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return ""
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}
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func (v *FlagJSON) Set(raw string) error {
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f, err := os.Open(raw)
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if err != nil {
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return err
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}
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defer f.Close()
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if *v == nil {
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*v = make(map[string]string)
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}
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if err := json.NewDecoder(f).Decode(v); err != nil {
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return fmt.Errorf(
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"Error reading variables in '%s': %s", raw, err)
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}
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return nil
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}
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