310 lines
10 KiB
Markdown
310 lines
10 KiB
Markdown
Alacritty
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=========
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[](https://travis-ci.org/jwilm/alacritty)
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Alacritty is the fastest terminal emulator in existence. Using the GPU for
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rendering enables optimizations that simply aren't possible in other emulators.
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Alacritty currently supports macOS and Linux, and Windows support is planned
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before the 1.0 release.
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<p align="center">
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<img width="600" alt="Alacritty running vim inside tmux" src="https://cloud.githubusercontent.com/assets/4285147/21585004/2ebd0288-d06c-11e6-95d3-4a2889dbbd6f.png">
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</p>
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## About
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Alacritty is focused on simplicity and performance. The performance goal means
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it should be faster than any other terminal emulator available. The simplicity
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goal means that it doesn't have features such as tabs or splits (which can be
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better provided by a window manager or [terminal multiplexer][tmux]) nor
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niceties like a GUI config editor.
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The software is considered to be at an **alpha** level of readiness--there are
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missing features and bugs to be fixed, but it is already used by many as a daily
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driver.
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Precompiled binaries will eventually be made available on supported platforms.
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This is minimally blocked on a stable config format. For now, Alacritty must be
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built from source.
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## Further information
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- [Announcing Alacritty, a GPU-Accelerated Terminal Emulator](http://blog.jwilm.io/announcing-alacritty/) January 6, 2017
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- [A short talk about Alacritty at the Rust Meetup January 2017](https://air.mozilla.org/rust-meetup-january-2017/) (starts at 57:00)
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## Installation
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Instructions are provided for macOS and many Linux variants to compile Alacritty
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from source. With the exception of Arch (which has a package in the AUR) and
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[NixOS](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/misc/alacritty/default.nix)
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(at the moment in unstable, will be part of 17.09), please first read the
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[prerequisites](#prerequisites) section, then find the section for your OS, and
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finally go to [building](#building) and [configuration](#configuration).
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### Arch Linux
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```sh
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git clone https://aur.archlinux.org/alacritty-git.git
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cd alacritty-git
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makepkg -isr
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```
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## Manual Installation
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### Prerequisites
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1. Alacritty requires the most recent stable Rust compiler; it can be installed with
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`rustup`.
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Note: **DO NOT** use the Homebrew Rust compiler on macOS (see [FAQ][faq] for
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explanation).
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#### Installing Rust compiler with `rustup`
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1. Install [`rustup.rs`](https://rustup.rs/).
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2. Clone the source code:
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```sh
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git clone https://github.com/jwilm/alacritty.git
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cd alacritty
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```
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3. Make sure you have the right Rust compiler installed. Run
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```sh
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rustup override set stable
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rustup update stable
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```
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#### Ubuntu
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On Ubuntu, you need a few extra libraries to build Alacritty. Here's an `apt`
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command that should install all of them. If something is still found to be
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missing, please open an issue.
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```sh
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apt-get install cmake libfreetype6-dev libfontconfig1-dev xclip
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```
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#### Arch Linux
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On Arch Linux, you need a few extra libraries to build Alacritty. Here's a
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`pacman` command that should install all of them. If something is still found
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to be missing, please open an issue.
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```sh
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pacman -S cmake freetype2 fontconfig pkg-config make xclip
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```
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#### Fedora
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On Fedora, you need a few extra libraries to build Alacritty. Here's a `dnf`
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command that should install all of them. If something is still found to be
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missing, please open an issue.
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```sh
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dnf install cmake freetype-devel fontconfig-devel xclip
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```
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#### CentOS/RHEL 7
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On CentOS/RHEL 7, you need a few extra libraries to build Alacritty. Here's a `yum`
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command that should install all of them. If something is still found to be
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missing, please open an issue.
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```sh
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yum install cmake freetype-devel fontconfig-devel xclip
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```
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#### openSUSE
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On openSUSE, you need a few extra libraries to build Alacritty. Here's
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a `zypper` command that should install all of them. If something is
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still found to be missing, please open an issue.
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```sh
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zypper install cmake freetype-devel fontconfig-devel xclip
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```
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#### Slackware
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Compiles out of the box for 14.2
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For copy & paste support (middle mouse button) you need to install xclip
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https://slackbuilds.org/repository/14.2/misc/xclip/?search=xclip
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#### Void Linux
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On [Void Linux](https://voidlinux.eu), install following packages before
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compiling Alacritty:
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```sh
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xbps-install cmake freetype-devel freetype expat-devel fontconfig xclip
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```
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#### FreeBSD
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On FreeBSD, you need a few extra libraries to build Alacritty. Here's a `pkg`
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command that should install all of them. If something is still found to be
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missing, please open an issue.
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```sh
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pkg install cmake freetype2 fontconfig xclip pkgconf
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```
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#### Solus
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On [Solus](https://solus-project.com/), you need a few extra libraries to build
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Alacritty. Here's a `eopkg` command that should install all of them. If
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something is still found to be missing, please open an issue.
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```sh
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sudo eopkg install fontconfig-devel
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```
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### NixOS/Nixpkgs
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The following command can be used to get a shell with all development
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dependencies on [NixOS](https://nixos.org).
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```sh
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nix-shell -A alacritty '<nixpkgs>'
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```
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#### Gentoo
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On Gentoo, there's a portage overlay available. Make sure `layman` is installed
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and run:
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```sh
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sudo layman -a slyfox
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```
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Then, add `x11-terms/alacritty **` to `/etc/portage/package.accept_keywords` and
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emerge alacritty:
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```sh
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sudo emerge alacritty
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```
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It might be handy to mask all other packages provided in the `slyfox` overlay by
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adding `*/*::slyfox` to `/etc/portage/package.mask` and adding
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`x11-terms/alacritty::slyfox` to `/etc/portage/package.unmask`.
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#### Other
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If you build Alacritty on another distribution, we would love some help
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filling in this section of the README.
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### Building
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Once all the prerequisites are installed, compiling Alacritty should be easy:
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```sh
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cargo build --release
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```
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If all goes well, this should place a binary at `target/release/alacritty`.
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**BEFORE YOU RUN IT:** Install the config file as described below; otherwise,
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many things (such as arrow keys) will not work. If you're on macOS, you'll need
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to change the `monospace` font family to something like `Menlo`.
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### Desktop Entry
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Many linux distributions support desktop entries for adding applications to
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system menus. To install the desktop entry for Alacritty, run
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```sh
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sudo cp target/release/alacritty /usr/local/bin # or anywhere else in $PATH
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cp Alacritty.desktop ~/.local/share/applications
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```
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To build an application for macOS, run
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```sh
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make app
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cp -r target/release/osx/Alacritty.app /Applications/Alacritty.app
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```
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## Configuration
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Although it's possible the default configuration would work on your system,
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you'll probably end up wanting to customize it anyhow. There is a default
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`alacritty.yml` at the git repository root. Alacritty looks for the
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configuration file as the following paths:
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1. `$XDG_CONFIG_HOME/alacritty/alacritty.yml`
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2. `$XDG_CONFIG_HOME/alacritty.yml`
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3. `$HOME/.config/alacritty/alacritty.yml`
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4. `$HOME/.alacritty.yml`
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If none of these paths are found then
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`$XDG_CONFIG_HOME/alacritty/alacritty.yml` is created once alacritty is first
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run. On most systems this often defaults to
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`$HOME/.config/alacritty/alacritty.yml`.
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Many configuration options will take effect immediately upon saving changes to
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the config file. The only exception is the `font` and `dimensions` sections
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which requires Alacritty to be restarted. For further explanation of the config
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file, please consult the comments in the default config file.
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## Issues (known, unknown, feature requests, etc)
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If you run into a problem with Alacritty, please file an issue. If you've got a
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feature request, feel free to ask about it. Keep in mind that Alacritty is very
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much not looking to be a feature-rich terminal emulator with all sorts of bells
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and widgets. It's primarily a cross-platform, blazing fast `tmux` renderer that
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Just Works.
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## FAQ
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- _proc-macro derive panicked during macOS build; what's wrong?_ There's an
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issue with the Rust compiler from Homebrew. Please follow the instructions
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and use `rustup`.
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- _Is it really the fastest terminal emulator?_ In the terminals I've
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benchmarked against, alacritty is either faster, WAY faster, or at least
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neutral. There are no benchmarks in which I've found Alacritty to be slower.
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- _macOS + tmux + vim is slow! I thought this was supposed to be fast!_ This
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appears to be an issue outside of terminal emulators; either macOS has an IPC
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performance issue, or either tmux or vim (or both) have a bug. This same issue
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can be seen in `iTerm2` and `Terminal.app`. I've found that if tmux is running
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on another machine which is connected to Alacritty via SSH, this issue
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disappears. Actual throughput and rendering performance are still better in
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Alacritty.
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- _When will Windows support be available?_ When someone has time to work on it.
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Contributors would be welcomed :).
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- _My arrow keys don't work_. It sounds like you deleted some key bindings from
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your config file. Please reference the default config file to restore them.
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- _Why doesn't it support scrollback?_ Alacritty's original purpose was to
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provide a better experience when using [tmux] which already handled
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scrollback. The scope of this project has since expanded, and [scrollback will
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eventually be added](https://github.com/jwilm/alacritty/issues/124).
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## IRC
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Alacritty discussion can be found in `#alacritty` on freenode.
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## Wayland
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Wayland support is available, but not everything works as expected. Many people
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have found a better experience using XWayland which can be achieved launching
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Alacritty with the `WAYLAND_DISPLAY` environment variable cleared:
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```sh
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env WAYLAND_DISPLAY= alacritty
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```
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If you're interested in seeing our Wayland support improve, please head over to
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the [Wayland meta issue] on the _winit_ project to see how you may contribute.
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## License
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Alacritty is released under the [Apache License, Version 2.0].
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[Apache License, Version 2.0]: https://github.com/jwilm/alacritty/blob/readme/LICENSE-APACHE
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[faq]: https://github.com/jwilm/alacritty#faq
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[tmux]: https://github.com/tmux/tmux
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[Wayland meta issue]: https://github.com/tomaka/winit/issues/306
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