# Module hilbish

the core Hilbish API

### Introduction

The Hilbish module includes the core API, containing interfaces and functions which directly relate to shell functionality.

### Interface fields

- `ver`: The version of Hilbish
- `user`: Username of the user
- `host`: Hostname of the machine
- `dataDir`: Directory for Hilbish data files, including the docs and default modules
- `interactive`: Is Hilbish in an interactive shell?
- `login`: Is Hilbish the login shell?
- `vimMode`: Current Vim input mode of Hilbish (will be nil if not in Vim input mode)
- `exitCode`: xit code of the last executed command

### Functions

#### alias(cmd, orig)

Sets an alias of `cmd` to `orig`

#### appendPath(dir)

Appends `dir` to $PATH

#### complete(scope, cb)

Registers a completion handler for `scope`. A `scope` is currently only expected to be `command.<cmd>`, replacing with the name of the command (for example `command.git`). `cb` must be a function that returns a table of “completion groups.” Check `doc completions` for more information.

#### cwd() -> string

Returns the current directory of the shell

#### exec(cmd)

Replaces running hilbish with `cmd`

#### goro(fn)

Puts `fn` in a goroutine

#### highlighter(line)

Line highlighter handler. This is mainly for syntax highlighting, but in reality could set the input of the prompt to display anything. The callback is passed the current line and is expected to return a line that will be used as the input display. Note that to set a highlighter, one has to override this function. Example:

    function hilbish.highlighter(line)
       return line:gsub('"%w+"', function(c) return lunacolors.green(c) end)
    end

This code will highlight all double quoted strings in green.

#### hinter(line, pos)

The command line hint handler. It gets called on every key insert to determine what text to use as an inline hint. It is passed the current line and cursor position. It is expected to return a string which is used as the text for the hint. This is by default a shim. To set hints, override this function with your custom handler.

#### inputMode(mode)

Sets the input mode for Hilbish’s line reader. Accepts either emacs or vim

#### interval(cb, time) -> Timer

Runs the `cb` function every `time` milliseconds. This creates a timer that starts immediately.

#### multiprompt(str)

Changes the continued line prompt to `str`

#### prependPath(dir)

Prepends `dir` to $PATH

#### prompt(str, typ)

Changes the shell prompt to `str` There are a few verbs that can be used in the prompt text. These will be formatted and replaced with the appropriate values. `%d` - Current working directory `%u` - Name of current user `%h` - Hostname of device

#### read(prompt) -> input (string)

Read input from the user, using Hilbish’s line editor/input reader. This is a separate instance from the one Hilbish actually uses. Returns `input`, will be nil if ctrl + d is pressed, or an error occurs (which shouldn’t happen)

#### run(cmd, returnOut) -> exitCode (number), stdout (string), stderr (string)

Runs `cmd` in Hilbish’s sh interpreter. If returnOut is true, the outputs of `cmd` will be returned as the 2nd and 3rd values instead of being outputted to the terminal.

#### runnerMode(mode)

Sets the execution/runner mode for interactive Hilbish. This determines whether Hilbish wll try to run input as Lua and/or sh or only do one of either. Accepted values for mode are hybrid (the default), hybridRev (sh first then Lua), sh, and lua. It also accepts a function, to which if it is passed one will call it to execute user input instead.

#### timeout(cb, time) -> Timer

Runs the `cb` function after `time` in milliseconds. This creates a timer that starts immediately.

#### which(name) -> string

Checks if `name` is a valid command. Will return the path of the binary, or a basename if it’s a commander.

### Types

### Sink

A sink is a structure that has input and/or output to/from a desination.

#### Methods

##### autoFlush(auto)

Sets/toggles the option of automatically flushing output. A call with no argument will toggle the value.

##### flush()

Flush writes all buffered input to the sink.

##### read() -> string

Reads input from the sink.

##### write(str)

Writes data to a sink.

##### writeln(str)

Writes data to a sink with a newline at the end.