diff -r db4911b0c721 -r 445e01aede7e vendor/github.com/spf13/cobra/user_guide.md --- a/vendor/github.com/spf13/cobra/user_guide.md Tue Aug 23 22:33:28 2022 +0200 +++ b/vendor/github.com/spf13/cobra/user_guide.md Tue Aug 23 22:39:43 2022 +0200 @@ -29,10 +29,10 @@ ## Using the Cobra Generator -Cobra provides its own program that will create your application and add any +Cobra-CLI is its own program that will create your application and add any commands you want. It's the easiest way to incorporate Cobra into your application. -[Here](https://github.com/spf13/cobra/blob/master/cobra/README.md) you can find more information about it. +For complete details on using the Cobra generator, please refer to [The Cobra-CLI Generator README](https://github.com/spf13/cobra-cli/blob/main/README.md) ## Using the Cobra Library @@ -51,7 +51,7 @@ Short: "Hugo is a very fast static site generator", Long: `A Fast and Flexible Static Site Generator built with love by spf13 and friends in Go. - Complete documentation is available at http://hugo.spf13.com`, + Complete documentation is available at https://gohugo.io/documentation/`, Run: func(cmd *cobra.Command, args []string) { // Do Stuff Here }, @@ -86,7 +86,7 @@ userLicense string rootCmd = &cobra.Command{ - Use: "cobra", + Use: "cobra-cli", Short: "A generator for Cobra based Applications", Long: `Cobra is a CLI library for Go that empowers applications. This application is a tool to generate the needed files @@ -281,7 +281,7 @@ In this example, the persistent flag `author` is bound with `viper`. **Note**: the variable `author` will not be set to the value from config, -when the `--author` flag is not provided by user. +when the `--author` flag is provided by user. More in [viper documentation](https://github.com/spf13/viper#working-with-flags). @@ -300,10 +300,34 @@ rootCmd.MarkPersistentFlagRequired("region") ``` +### Flag Groups + +If you have different flags that must be provided together (e.g. if they provide the `--username` flag they MUST provide the `--password` flag as well) then +Cobra can enforce that requirement: +```go +rootCmd.Flags().StringVarP(&u, "username", "u", "", "Username (required if password is set)") +rootCmd.Flags().StringVarP(&pw, "password", "p", "", "Password (required if username is set)") +rootCmd.MarkFlagsRequiredTogether("username", "password") +``` + +You can also prevent different flags from being provided together if they represent mutually +exclusive options such as specifying an output format as either `--json` or `--yaml` but never both: +```go +rootCmd.Flags().BoolVar(&u, "json", false, "Output in JSON") +rootCmd.Flags().BoolVar(&pw, "yaml", false, "Output in YAML") +rootCmd.MarkFlagsMutuallyExclusive("json", "yaml") +``` + +In both of these cases: + - both local and persistent flags can be used + - **NOTE:** the group is only enforced on commands where every flag is defined + - a flag may appear in multiple groups + - a group may contain any number of flags + ## Positional and Custom Arguments -Validation of positional arguments can be specified using the `Args` field -of `Command`. +Validation of positional arguments can be specified using the `Args` field of `Command`. +If `Args` is undefined or `nil`, it defaults to `ArbitraryArgs`. The following validators are built in: @@ -315,6 +339,7 @@ - `ExactArgs(int)` - the command will report an error if there are not exactly N positional args. - `ExactValidArgs(int)` - the command will report an error if there are not exactly N positional args OR if there are any positional args that are not in the `ValidArgs` field of `Command` - `RangeArgs(min, max)` - the command will report an error if the number of args is not between the minimum and maximum number of expected args. +- `MatchAll(pargs ...PositionalArgs)` - enables combining existing checks with arbitrary other checks (e.g. you want to check the ExactArgs length along with other qualities). An example of setting the custom validator: @@ -404,7 +429,7 @@ } ``` -For a more complete example of a larger application, please checkout [Hugo](http://gohugo.io/). +For a more complete example of a larger application, please checkout [Hugo](https://gohugo.io/). ## Help Command @@ -602,7 +627,7 @@ Run 'hugo --help' for usage. ``` -Suggestions are automatic based on every subcommand registered and use an implementation of [Levenshtein distance](http://en.wikipedia.org/wiki/Levenshtein_distance). Every registered command that matches a minimum distance of 2 (ignoring case) will be displayed as a suggestion. +Suggestions are automatic based on every subcommand registered and use an implementation of [Levenshtein distance](https://en.wikipedia.org/wiki/Levenshtein_distance). Every registered command that matches a minimum distance of 2 (ignoring case) will be displayed as a suggestion. If you need to disable suggestions or tweak the string distance in your command, use: @@ -635,3 +660,7 @@ ## Generating shell completions Cobra can generate a shell-completion file for the following shells: bash, zsh, fish, PowerShell. If you add more information to your commands, these completions can be amazingly powerful and flexible. Read more about it in [Shell Completions](shell_completions.md). + +## Providing Active Help + +Cobra makes use of the shell-completion system to define a framework allowing you to provide Active Help to your users. Active Help are messages (hints, warnings, etc) printed as the program is being used. Read more about it in [Active Help](active_help.md).