Hilbish/docs/api/hilbish/hilbish.runner.md

title	description	layout	menu
Module hilbish.runner	interactive command runner customization	doc	docs parent API

Introduction

The runner interface contains functions that allow the user to change how Hilbish interprets interactive input. Users can add and change the default runner for interactive input to any language or script of their choosing. A good example is using it to write command in Fennel.

Runners are functions that evaluate user input. The default runners in Hilbish can run shell script and Lua code.

A runner is passed the input and has to return a table with these values. All are not required, only the useful ones the runner needs to return. (So if there isn't an error, just omit err.)

• exitCode (number): A numerical code to indicate the exit result.
• input (string): The user input. This will be used to add to the history.
• err (string): A string to indicate an interal error for the runner. It can be set to a few special values for Hilbish to throw the right hooks and have a better looking message:

[command]: not-found will throw a command.not-found hook based on what [command] is.

[command]: not-executable will throw a command.not-executable hook.

• continue (boolean): Whether to prompt the user for more input.

Here is a simple example of a fennel runner. It falls back to shell script if fennel eval has an error.

local fennel = require 'fennel'

hilbish.runnerMode(function(input)
	local ok = pcall(fennel.eval, input)
	if ok then
		return {
			input = input
		}
	end

	return hilbish.runner.sh(input)
end)

Functions

setMode(cb)	This is the same as the hilbish.runnerMode function.
lua(cmd)	Evaluates cmd as Lua input. This is the same as using dofile
sh(cmd)	Runs a command in Hilbish's shell script interpreter.

---

hilbish.runner.setMode(cb)

This is the same as the hilbish.runnerMode function.
It takes a callback, which will be used to execute all interactive input.
In normal cases, neither callbacks should be overrided by the user,
as the higher level functions listed below this will handle it.

Parameters

function cb

---

hilbish.runner.lua(cmd)

Evaluates cmd as Lua input. This is the same as using dofile
or load, but is appropriated for the runner interface.

Parameters

string cmd

---

hilbish.runner.sh(cmd)

Runs a command in Hilbish's shell script interpreter.
This is the equivalent of using source.

Parameters

string cmd