A callback called when the command line contains an invalid option or subcommand name. It takes the entered name and a list of all registered names option/subcommand names and filters the list down to values to suggest to the user.

envvarReader

var envvarReader: (key: String) -> String?

A function called by Clikt to get a parameter value from a given environment variable

expandArgumentFiles

var expandArgumentFiles: Boolean

If true, arguments starting with @ will be expanded as argument files. If false, they will be treated as normal arguments.

helpFormatter

var helpFormatter: HelpFormatter?

The help formatter for this command, or null to use the default

helpOptionNames

var helpOptionNames: Set<String>

The names to use for the help option.

localization

var localization: Localization

Localized strings to use for help output and error reporting.

printExtraMessages

var printExtraMessages: Boolean

Set this to false to prevent extra messages from being printed automatically.

readEnvvarBeforeValueSource

var readEnvvarBeforeValueSource: Boolean

If false,the valueSource is searched before environment variables.

tokenTransformer

var tokenTransformer: Context.(String) -> String

An optional transformation function that is called to transform command line

valueSource

var valueSource: ValueSource?

The source that will attempt to read values for options that aren't present on the command line.