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Add documentation for flags with custom variable names #403

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16 changes: 16 additions & 0 deletions README.md
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Expand Up @@ -246,6 +246,22 @@ It is possible to mark a flag as hidden, meaning it will still function as norma
flags.MarkHidden("secretFlag")
```

## Custom flag variable names
It is possible to change the variable name used in command help output for non-boolean flags. By default, the variable name is an educated guess based on the flag type.

**Example**
```go
flags.String("normalflag", "", "unchanged variable name")
flags.String("fancyflag", "", "enter a `fancyvalue` for this flag")
flags.PrintDefaults()
```

**Output**
```
--fancyflag fancyvalue enter a fancyvalue for this flag
--normalflag string unchanged variable name
```

## Disable sorting of flags
`pflag` allows you to disable sorting of flags for help and usage message.

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