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Add example for making persistent flags required (#1135)

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Adam Demuri 2020-10-14 09:53:09 -06:00 committed by GitHub
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@ -419,6 +419,12 @@ rootCmd.Flags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
rootCmd.MarkFlagRequired("region")
```
Or, for persistent flags:
```go
rootCmd.PersistentFlags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
rootCmd.MarkPersistentFlagRequired("region")
```
## Positional and Custom Arguments
Validation of positional arguments can be specified using the `Args` field