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Warn when a yaml file has duplicated keys

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Try using `UnmarshalStrict`, if it fails, print the errors as a warning and try again with plain `Unmarshal`.

Errors look this way:
```
2019/03/26 15:11:33 warning reading config file: yaml: unmarshal errors:
  line 6: key "api_key" already set in map
```
This commit is contained in:
Albert Vaca 2019-03-26 15:14:00 +01:00 • committed by Albert Vaca
parent 10edc96e10
commit 42a499d7ac
1 changed files with 6 additions and 2 deletions
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8
viper.go
View file

@ -1462,8 +1462,12 @@ func (v *Viper) unmarshalReader(in io.Reader, c map[string]interface{}) error {
switch strings.ToLower(v.getConfigType()) {
case "yaml", "yml":
if err := yaml.Unmarshal(buf.Bytes(), &c); err != nil {
return ConfigParseError{err}
// Try UnmarshalStrict first, so we can warn about duplicated keys
if strictErr := yaml.UnmarshalStrict(buf.Bytes(), &c); strictErr != nil {
if err := yaml.Unmarshal(buf.Bytes(), &c); err != nil {
return ConfigParseError{err}
}
log.Printf("warning reading config file: %v\n", strictErr)
}
case "json":