obvgab/lem

Common Lisp editor/IDE with high expansibility

Lem is the editor/IDE well-tuned for Common Lisp.

After installing lem, you can start developing in Common Lisp at once.

You can skip over writing tidy settings or installing many plugins as you do on Emacs.

Lem supports other programming languages thanks to its built-in LSP client. You can choose between an Emacs and a Vim mode.

Other Lem features include:

• a project explorer tree view
• project-aware commands
• interactive grep and git interfaces
• multiple cursors
• tetris
• and more…

Download

Lem 2.1 was released!

See our Lem 2.1 realease to download binaries for Windows, MacOS and Linux.

On mac, you need to run xattr -d com.apple.quarantine /Applications/lem.app.
See lem-project#635

If the installation fails

Please refer to the following issue lem-project#628

Screenshot

　　

Requirement

• ncurses
• sbcl
• qlot
• SDL2 (optional)

Platform

• Linux
• MacOS
• Windows

Install

Requirement

sbcl

qlot

See https://github.com/fukamachi/qlot#installation

curl -L https://qlot.tech/installer | bash

build

make

SDL2

Dependent packages must be installed.
See https://github.com/lem-project/lem/blob/main/frontends/sdl2/README.md

make sdl2

update

make update

Usage

$ lem <filename.lisp>

You can watch the screencast on Youtube.

Screencast

You can start "lem" using the following command.

$ qlot exec sbcl
* (ql:quickload :lem-ncurses)
* (lem:lem)

Configuration

Lem loads ~/.lem/init.lisp when starting up.

You can see an example here

fukamachi also published his init files on GitHub. https://github.com/fukamachi/.lem

Extensions and modes

• Pareto - A mode, complement to the Paredit. Makes Lisp code editing even more efficient!

How to develop lisp

See https://lem-project.github.io/lem-page/usage/common_lisp/

How to hack on lem itself

See https://github.com/lem-project/lem/wiki/How-to-hack-on-lem-itself

If you have a questions, join the Discord.

How to contribute to lem

See https://lem-project.github.io/lem-page/development/how-to-contribute-to-lem/

Contributors

This project exists thanks to all the people who contribute. [Contribute].

Backers

Thank you to all our backers! 🙏 [Become a backer]

Sponsors

Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [Become a sponsor]

License

MIT