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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.

Screenshot

　　

Requirement

The official installation requires:

• roswell
• ncurses

You can also use Docker: see https://github.com/40ants/lem-docker

Platform

• Linux
• MacOS 10.13+
• Windows

Installation

Find Lem 2.0 binaries on the releases page.

To install from sources, please install roswell at first.

Roswell Installation Guide

After that, please follow the steps bellow.

1. install lem by roswell
$ ros install cxxxr/lem

2. add the PATH in the initialization file(such as ~/.bashrc)
export PATH=$PATH:~/.roswell/bin

Without Roswell, you can pull Lem sources and execute "(ql:quickload :lem-ncurses)" then "(lem:lem)" to start Lem.

Usage

$ lem <filename.lisp>

You can watch the screencast on Youtube.

Screencast

SDL2 version (new in Lem 2.0)

See the Lem 2.0 releases to download binaries.

To install from sources, follow the instructions on the README here: https://github.com/lem-project/lem/blob/master/frontends/sdl2/README.md

Electron version (Experiment)

Electron version is in the experimental stage.

If you try, please follow below steps.

$ node -v  # check if your nodejs is 8.9.3LTS+.
v8.9.3
$ npm -v
5.5.1
$ npm install -g cxxxr/lem   # install lem-electron
$ lem-electron               # Electron version will start

　　

Notes

• For Rasberry Pi users: You need to use CCL(Clozure Common Lisp).
  Please change the CL implementation to CCL as follow:

$ ros use ccl-bin

Contributors

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

License

MIT