outil

command

pub fn command(name: String, description: String, continue: fn(
    Command(a),
  ) -> Command(a)) -> Command(a)

Create a command with the given name and description, and pass it to the given continuation function for further configuration.

The command gets a default implementation that returns an error.

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pub fn execute(cmd: Command(a), args: List(String)) -> Result(
  a,
  Error,
)

Execute the command with the given argument vector, without the program name.

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pub fn implement(cmd: Command(a), run: fn(List(String)) ->
    Result(a, Error)) -> Command(a)

Add the code to evaluate when the command is executed.

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pub fn usage(cmd: Command(a)) -> String

Return a string describing the usage of the given command.