mirror of https://github.com/spf13/viper.git
writeConfig operations are atomic
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parent
d9d7dcdc63
commit
b783f57e01
22
viper.go
22
viper.go
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@ -1490,17 +1490,27 @@ func (v *Viper) writeConfig(filename string, force bool) error {
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if v.config == nil {
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v.config = make(map[string]interface{})
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}
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flags := os.O_CREATE | os.O_TRUNC | os.O_WRONLY
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if !force {
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flags |= os.O_EXCL
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}
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f, err := v.fs.OpenFile(filename, flags, v.configPermissions)
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exists, err := afero.Exists(v.fs, filename)
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if err != nil {
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return err
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}
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if exists && !force {
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return fmt.Errorf("file already exists: %s", filename)
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}
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f, err := afero.TempFile(v.fs, filepath.Dir(filename), filepath.Base(filename)+"-")
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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 err := v.marshalWriter(f, configType); err != nil {
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f.Close()
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return err
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}
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f.Close()
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err = v.fs.Rename(f.Name(), filename)
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if err != nil {
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return err
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}
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