Lem ncurses

Lem has nightly releases! for Linux, MacOS and Windows.

Copy the app file to the applications folder and type the following in your terminal:

xattr -d com.apple.quarantine /Applications/lem.app

Use the ready-to-use Lem image in the GitHub Container Registry:

$ docker run --rm -it ghcr.io/lem-project/lem:latest

or clone the Lem repository and build the Docker image:

$ docker build -t lem .

You can now run it:

$ docker run --rm -it -v .:/shared lem

There is an automatic installer that works on Debian, Linux Mint and Ubuntu.

Before that, install the dependencies:

sudo apt install sbcl curl git

Now, run the command that will install Lem:

curl -L https://lem-project.github.io/linux_installer.sh | bash

Important places from the script installation:

• $HOME/common-lisp/lem (Lem installation location)
• /usr/local/bin/lem (Lem symlink)

• sbcl
• ncurses
• qlot
• git

This is a list of optional programs that we advise to install along of Lem.

On a Debian system:

libvterm-dev
fd

• libvterm-dev is a C library that abstracts xterm-like terminals. See: libvterm, GitHub mirror.
  • Lem needs libvterm version >= 3.3 to provide a terminal inside Lem.
• fd or fd-find on Debian repositories: if present, Lem will use it in commands that find files recursively (see Usage: Opening Files). fd respects .gitignore by default and ignores common large development directories such as node_modules/. If it isn’t present, Lem will fallback to a full Lisp solution.

• Debian-like distro

sudo apt install sbcl libncurses5-dev build-essential fd-find

• Fedora

sudo yum install sbcl ncurses-devel make automake gcc gcc-c++ fd-find

• OpenSuse

sudo zypper install sbcl ncurses-devel make devel_basis fd

• Automatic installer

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

For an alternative installation, https://github.com/fukamachi/qlot#installation

• Create the directories

mkdir $HOME/common-lisp && cd $HOME/common-lisp

git clone https://github.com/lem-project/lem.git
cd lem && make ncurses

or run make sdl2-ncurses to build Lem with the two interfaces in it. Then choose the interface at startup with -i / --interface, either “sdl2” or “ncurses”.

• Copying the PATH to ~/.bashrc

export PATH="$HOME/common-lisp/lem:$PATH"

Note: the installation with Roswell is deprecated.

Please install roswell at first, Roswell Installation Guide.

After that, please follow the steps bellow.

1. Install lem by roswell

$ ros follow-dependency=t install lem-project/lem

2. Add the PATH in the initialization file (such as ~/.bashrc)

export PATH=$PATH:~/.roswell/bin

If your keyboard is a JIS layout, you need to put the following settings in $HOME/.lem/init.lisp

#+lem-sdl2
(lem-sdl2:set-keyboard-layout :jis)