linenoise

Lightweight readline alternative
IN THIS PACKAGE
Module LNoise
type completions

Abstract type of completions, given to your completion callback

val add_completion : completions -> string -> unit

This function is used by the callback function registered by the user in order to add completion options given the input string when the user typed <TAB>.

val set_completion_callback : ( string -> completions -> unit ) -> unit

Register the callback function that is called for upon tab-completion, aka when <TAB> is hit in the terminal

val linenoise : string -> string option

The high level function that is the main API of the linenoise library. This function checks if the terminal has basic capabilities, just checking for a blacklist of stupid terminals, and later either calls the line editing function or uses dummy fgets() so that you will be able to type something even in the most desperate of the conditions.

val history_add : string -> ( unit, string ) Result.result

Add a string to the history

val history_set : max_length:int -> ( unit, string ) Result.result

Set the maximum length for the history. This function can be called even if there is already some history, the function will make sure to retain just the latest 'len' elements if the new history length value is smaller than the amount of items already inside the history.

val history_save : filename:string -> ( unit, string ) Result.result

Save the history in the specified file

val history_load : filename:string -> ( unit, string ) Result.result

Load the history from the specified file.

val clear_screen : unit -> unit

Clear the screen; used to handle CTRL+L

val catch_break : bool -> unit

If true, ctrl-c during a call to linenoise will raise Sys.Break instead of returning an empty string.

  • since 1.1
val set_multiline : bool -> unit

Set if to use or not use the multi line mode.

val print_keycodes : unit -> unit

This special mode is used by linenoise in order to print scan codes on screen for debugging / development purposes.

type hint_color =
| Red
| Green
| Yellow
| Blue
| Magenta
| Cyan
| White

What color you want the hints to be.

val set_hints_callback : ( string -> (string * hint_color * bool) option ) -> unit

Set a hints callback, callback gets a string, aka the line input, and you get a chance to give a hint to the user. Example, imagine if user types git remote add, then you can give a hint of <this is where you add a remote name> <this is where you add the remote's URL>, see animated gif in source repo for clear example. Returned tuple represents the hint message, color, and whether it ought to be bold.