mirror of https://github.com/Hilbis/Hilbish
71 lines
3.2 KiB
Markdown
71 lines
3.2 KiB
Markdown
Hilbish allows you to change how interactive text can be interpreted.
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This is mainly due to the fact that the default method Hilbish uses
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is that it runs Lua first and then falls back to shell script.
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In some cases, someone might want to switch to just shell script to avoid
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it while interactive but still have a Lua config, or go full Lua to use
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Hilbish as a REPL. This also allows users to add alternative languages like
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Fennel as the interactive script runner.
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Runner mode can also be used to handle specific kinds of input before
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evaluating like normal, which is how [Link.hsh](https://github.com/TorchedSammy/Link.hsh)
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handles links.
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The "runner mode" of Hilbish is customizable via `hilbish.runnerMode`,
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which determines how Hilbish will run user input. By default, this is
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set to `hybrid` which is the previously mentioned behaviour of running Lua
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first then going to shell script. If you want the reverse order, you can
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set it to `hybridRev` and for isolated modes there is `sh` and `lua`
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respectively.
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You can also set it to a function, which will be called everytime Hilbish
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needs to run interactive input. For example, you can set this to a simple
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function to compile and evaluate Fennel, and now you can run Fennel.
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You can even mix it with sh to make a hybrid mode with Lua replaced by
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Fennel.
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An example:
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hilbish.runnerMode(function(input)
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local ok = pcall(fennel.eval, input)
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if ok then
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return input, 0, nil
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end
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return hilbish.runner.sh(input)
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end)
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The `hilbish.runner` interface is an alternative to using `hilbish.runnerMode`
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and also provides the shell script and Lua runner functions that Hilbish itself uses.
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A runner function is expected to return a table with the following values:
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- `exitCode` (number): Exit code of the command
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- `input` (string): The text input of the user. This is used by Hilbish to append extra input, in case
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more is requested.
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- `err` (string): A string that represents an error from the runner.
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This should only be set when, for example, there is a syntax error.
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It can be set to a few special values for Hilbish to throw the right
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hooks and have a better looking message.
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- `<command>: not-found` will throw a `command.not-found` hook
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based on what `<command>` is.
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- `<command>: not-executable` will throw a `command.not-executable` hook.
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- `continue` (boolean): Whether Hilbish should prompt the user for no input
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## Functions
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These are the "low level" functions for the `hilbish.runner` interface.
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+ setMode(mode) > The same as `hilbish.runnerMode`
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+ sh(input) -> table > Runs `input` in Hilbish's sh interpreter
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+ lua(input) -> table > Evals `input` as Lua code
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These functions should be preferred over the previous ones.
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+ setCurrent(mode) > The same as `setMode`, but works with runners managed
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via the functions below.
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+ add(name, runner) > Adds a runner to a table of available runners. The `runner`
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argument is either a function or a table with a run callback.
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+ set(name, runner) > The same as `add` but requires passing a table and
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overwrites if the `name`d runner already exists.
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+ get(name) > runner > Gets a runner by name. It is a table with at least a
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run function, to run input.
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+ exec(cmd, runnerName) > Runs `cmd` with a runner. If `runnerName` isn't passed,
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the current runner mode is used.
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