Ion is a modern system shell that features a simple, yet powerful, syntax. It is written entirely in Rust, which greatly increases the overall quality and security of the shell. It also offers a level of performance that exceeds that of Dash, when taking advantage of Ion's features. While it is developed alongside, and primarily for, RedoxOS, it is a fully capable on other *nix platforms.

Ion is still a WIP, and both its syntax and rules are subject to change over time. It is still quite a ways from becoming stabilized, but we are getting very close. Changes to the syntax at this time are likely to be minimal.

Ion has a RFC process for language proposals. Ion's formal specification is located within the rfcs branch. The RFC process is still in the early stages of development, so much of the current and future implementation ideas have yet to be written into the specification.

The Ion manual online is generated automatically on each commit via mdBook and hosted on Redox OS's website.

Building the manual for local reference

Sources for the manual are located in the manual directory.

1. Build the documentation file for the builtins

make manual

2. Then build the rest of the Ion manual via mdbook

mdbook build manual

Or you can build and open it in the your default browser via

mdbook serve manual --open

Or you can build and host the manual on your localhost via

mdbook serve manual 

See the examples folder and the Parallelion project

The following PPA supports the 18.04 (bionic) and 19.04 (disco) releases. Bionic builds were made using the Pop_OS PPA's rustc 1.39.0 package.

sudo add-apt-repository ppa:mmstick76/ion-shell

Those who are developing software with Rust should install the Rustup toolchain manager. After installing rustup, run rustup override set 1.56.0 to set your Rust toolchain to the version that Ion is targeting at the moment. To build for Redox OS, rustup override set nightly is required to build the Redox dependencies.

Please ensure that both cargo and rustc 1.56.0 or higher is installed for your system. Release tarballs have not been made yet due to Ion being incomplete in a few remaining areas.

git clone https://gitlab.redox-os.org/redox-os/ion/
cd ion
cargo install --path=. --force 

This way the ion executable will be installed into the folder "~/.cargo/bin"

As an alternative you can do it like this

git clone https://gitlab.redox-os.org/redox-os/ion/
cd ion
cargo build --release 
# Install to path which is included in the $PATH enviromnent variable
DESTDIR=~/.local/bin bash/install.sh

git clone https://gitlab.redox-os.org/redox-os/ion/
cd ion
cargo build --release 
sudo DESTDIR=/usr/local/bin bash/install.sh
# Optional: Do this if Ion shell shoulb be login shell on your system
sudo make update-shells prefix=/usr

There are plugins for ion. These plugins are additional aliases and function definitions written in Ion for Ion. They can be found under this repository.

For vim/nvim users there is an officially-supported syntax highlighting plugin.

Plugin 'vmchale/ion-vim'

For emacs users there is a kindly-supported syntax highlighting plugin.

(add-to-list 'load-path  (expand-file-name "/path/to/ion-mode"))
(require 'ion-mode)
(autoload 'ion-mode (locate-library "ion-mode") "Ion majore mode" t)
(add-to-list 'auto-mode-alist '("\\.ion\\'" . ion-mode))
(add-to-list 'auto-mode-alist '("/ion/initrc" . ion-mode))

There is a LSP-server for the scripting language of this shell. You can install the LSP-server via crates.io to get IDE support like error messages for an code editor or IDE which understands the client side of LSP. Link to LSP server on crates.io : https://crates.io/crates/ion_shell_lsp_server . The source code of the LSP server can be found here: https://gitlab.redox-os.org/redox-os/ion_lsp .