How Do I...
Evaluate code inline?
Within an editor, eval a single "block" (or form if you're used to LISP) is bound to Cmd/Ctrl+Enter by default and evaling an entire file is bound to Cmd/Ctrl+Shift+Enter. Not all file types know how to eval, to find out what kinds of clients are available for evaluation, open the connect tab and press the "Add Connection" button. This will give you a list of all the clients Light Table knows how to start.
Split windows?
You can create a new tabset by either right clicking in the tab area and selecting New tabset or by using the Tabs: Add a tabset command in the command bar. To close a tabset you can either use the Tabs: Remove active tabset command or resize it such that it has 0 width.
As of v0.8.1, it is not possible to split horizontally, but there is an issue open to address this.
Open a new window?
By default, Cmd/Ctrl+Shift+N is bound to the command Window: Open new window, which you can also just execute from the command tab.
Open a browser tab for live modification?
You can open a browser tab by either using the Browser: add browser tab command or by choosing the browser client type form the "Add Connection" menu in the connect tab. Once open, it is now available as an evaluation client and Cmd/Ctrl+R is bound to refreshing it.
Eval an arbitraty unit of code?
If you have something selected Light Table will send the selection text for eval if you press Cmd/Ctrl+Enter.
Eval Clojure?
To eval Clojure, open a .clj file and press Cmd/Ctrl+Enter. Light Table will find a leiningen project if there is one or it will use it's local REPL client to evaluate your code.
Eval ClojureScript
You can eval ClojureScript a couple of different ways. For your ClojureScript project, building your cljs assets and then pressing Cmd/Ctrl+Enter is recommended. To read more about this workflow, see the Clojure plugin REAMDE.
Eval Javascript in NodeJS?
To eval in a Node process:
- Go to the
connecttab - Click "Add Connection"
- Select "NodeJS"
- Choose a Javascript file to start the node server with.
- Open a .js file
- Press Cmd/Ctrl+Enter
- Select your nodejs client from the popup
Eval Python?
The easiest way is to simply open a Python file and press Cmd/Ctrl+Enter. This will cause Light Table to start a python client that it can then send code to.
Use IPython for Python eval?
By default, if Light Table can find a recent IPython installed on your machine, it will use it to provide a much more robust python evaluation environment. If you don't have it installed, follow these instructions to do so (make sure you install pyzmq as well). With it you can use matplotlib and pylab inline. To see if Light Table is using IPython for Python eval, open the connect tab and look to see if your Python client has the type of ipython. Note that in order for Light Table to use IPython, pyzmq also needs to be installed.
Use a different client once I've evaled something?
From the connect tab, find the client and make sure the editor you evaled in is active. The connected client(s) will appear highlighted. Click the "unset" button to force Light Table to re-evaluate what clients are available to eval in the editor.
Close a client?
From the connect tab, find the client and click the "disconnect" button.
Install a Plugin
Open the command pane and find the command "Plugins: Show Plugin Manager". In the manager, search for a plugin. Hover over a search result and click its install button.
Toggle Vim keybindings?
Install the Vim plugin using the Plugin Manager and then run the command App: Reload
behaviors. If Emacs is already installed, disable it in users.behaviors with [:editor
:-lt.plugins.emacs/activate-emacs].
Toggle Emacs keybindings?
Install the Emacs plugin using the Plugin Manager and then run the command App: Reload
behaviors. If Vim is already installed, disable it in users.behaviors with [:editor
:-lt.plugins.vim/activate-vim].
Write a plugin
Plugins are a great way to share your Light Table enhancement with the community. The recommended way to generate one is with lein new lt-plugin my-plugin --to-dir MyPlugin. Make sure to run that it in your plugin directory. Add the generated plugin to your workspace and open the generated .cljs file. With your LT UI connection set up, eval the file with Cmd-Shift Enter. Now try your new plugin command Say Hello! For more about writing plugins, see this wiki page.
Submit a plugin
If it's your first time submitting a plugin, make sure you have a valid plugin.edn. Fill out the keys as follows:
:name*: Camel case is recommended:version*: Must be in format X.X.X e.g. 0.1.4:source*: Must be a github url e.g. https://github.com/USER/PLUGIN:behaviors*: Refers to the behaviors file which is needed to load the plugin and define any keybinding or behavior.:desc: Primary means users can find your plugin:author: Your name and another useful way to find your plugin
* Means the field is required.
When releasing a new version, you must update the :version key and push the new git tag e.g. git tag X.X.X && git push --tags. With your updated plugin.edn, add or update your plugin to the plugin metadata repository using these instructions.