Termonad is a terminal emulator configurable in Haskell. It is extremely customizable and provides hooks to modify the default behavior. It can be thought of as the "XMonad" of terminal emulators.
Termonad was featured on an episode of DistroTube. This video gives a short overview of Termonad.
Table of Contents
Termonad can be installed on any system as long as the necessary GTK libraries are available. The following are instructions for installing Termonad on a few different distributions and systems. If the given steps don't work for you, or you want to add instructions for an additional system, please send a pull request.
The following steps use the
stack build tool to build
Termonad, but cabal can be used as well. Steps for
installing stack can be found on
this page.
First, you must install the required Gnome/GTK system libraries:
$ pacman -S vte3 gobject-introspectionIn order to install Termonad, clone this repository and run stack install.
This will install the termonad binary to ~/.local/bin/:
$ git clone https://github.com/cdepillabout/termonad
$ cd termonad/
$ stack installNote that Termonad depends on the haskell-gi family of Haskell libraries. haskell-gi contains Haskell wrappers for for Gnome/GTK system libraries. It uses the GObject Introspection functionality from the Gnome libraries.
One problem that Arch users often run into is that their system Gnome/GTK libraries are newer than what the haskell-gi dependencies from Stackage support. If you run into this problem, there are a couple things you can try:
- Manually switch to a newer Stackage resolver (probably Stackage Nightly). Newer Stackage resolvers often have newer versions of the
haskell-gilibraries. Newer versions of thehaskell-gilibraries are more likely to support your newer system Gnome/GTK libraries. If you get something working like this, please open a PR. - Use
cabalfor building Termonad instead ofstack. Make surecabal's constraint solver picks the latest versions of thehaskell-gilibraries on Hackage. - Use Nix for installing Termonad.
My suggestion is to use Nix, since it is highly likely to "just work" (because with Nix, all libraries are pinned to known working versions, even system libraries).
Termonad can be installed through apt on Debian and Ubuntu:
$ sudo apt install termonad libghc-termonad-devNote that the libghc-termonad-dev package is necessary if you want to be able
to compile the Haskell-based settings file, termonad.hs.
First, you must install the required Gnome/GTK system libraries:
$ apt-get install gobject-introspection libgirepository1.0-dev libgtk-3-dev libvte-2.91-dev libpcre2-devIn order to install Termonad, clone this repository and run stack install.
This will install the termonad binary to ~/.local/bin/:
$ git clone https://github.com/cdepillabout/termonad
$ cd termonad/
$ stack installIf you have nix installed, you should be able to use it to build Termonad.
This means that it will work on NixOS, or with nix on another distro. There
are two different ways to use nix to build Termonad:
The first is using stack. The following commands install stack for your
user, clone this repository, and install the termonad binary to ~/.local/bin/:
$ nix-env -i stack
$ git clone https://github.com/cdepillabout/termonad
$ cd termonad/
$ stack --nix install(edit: Building with stack using Nix-integration does not currently work.
See #99.)
The second is using the normal nix-build machinery. The following commands
clone this repository and build the termonad binary at ./result/bin/:
$ git clone https://github.com/cdepillabout/termonad
$ cd termonad/
$ nix-buildBuilding and installing Termonad on Mac OS X should be possible with any of the following three methods:
-
Install the required system libraries (like GTK and VTE) by hand, then use
stackto build Termonad.This is probably the easiest method. You don't have to understand anything about
nix. However, it is slightly annoying to have to install GTK and VTE by hand. -
Use
nixto install both the required system libraries and Termonad itself.If you are a nix user and want an easy way to install Termonad, this is the recommended method.
-
Use
nixto install install the required system libraries, andstackto build Termonad.If you are a nix user, but want to use
stackto actually do development on Termonad, usingstackmay be easier than usingcabal.
The following sections describe each method.
(currently no instructions available. please send a PR adding instructions if you get termonad to build using this method.)
nix can be used to install Termonad with the following steps, assuming you
have nix installed. These commands
clone this repository and build the termonad binary at ./result/bin/:
$ git clone https://github.com/cdepillabout/termonad
$ cd termonad/
$ nix-buildstack can be used in conjunction with nix to install Termonad. nix will
handle installing system dependencies (like GTK and VTE), while stack will
handle compiling and installing Haskell packages.
You must have nix installed.
You will also need stack installed. You can do that with the following command:
$ nix-env -i stackAfter stack is installed, you will need to clone Termonad and build it:
$ git clone https://github.com/cdepillabout/termonad
$ cd termonad/
$ stack --nix install
This will install the termonad binary to ~/.local/bin/.
To run Termonad on Windows, you'll need:
- any X server app, for example Vcxsrv
- any WSL, for example Ubuntu
I'm using both Vcxsrv and Ubuntu WSL.
Configure both Vcxsrv and WSL. For Vcxsrv go with default settings everywhere, it will be fine. Configure your WSL as you want (choose your name etc.). After you set up the user, you'll have to update your OS, run:
$ sudo apt-get update
$ sudo apt-get upgrade -y
$ sudo apt-get dist-upgrade -y
$ sudo apt-get autoremove -yConfigure the DISPLAY environment variable for the X server, and load the changes in bash:
For WSL1:
$ echo "export DISPLAY=localhost:0.0" >> ~/.bashrc
$ source ~/.bashrcFor WSL2:
$ echo export DISPLAY=$(awk '/nameserver / {print $2; exit}' /etc/resolv.conf 2>/dev/null):0 >> ~/.bashrc
$ echo export LIBGL_ALWAYS_INDIRECT=1 >> ~/.bashrc
$ source ~/.bashrcIf you're using WSL2, you have to create a separate inbound rule for TCP port 6000, to allow WSL access to the X server.
If you're using mentioned earlier Vcxsrv you can enable public access for your X server by disabling Access Control on the Extra Settings.
You can also use -ac flag in the Additional parameters for VcXsrv section.
Your X server should now be configured.
Execute following command to install the necessary GTK system libraries:
$ apt-get install gobject-introspection libgirepository1.0-dev libgtk-3-dev libvte-2.91-dev libpcre2-devThe required GTK system libraries should now be installed.
Clone the Termonad repo:
$ git clone https://github.com/cdepillabout/termonad
$ cd termonad/
$ stack build
$ stack runAfter stack run, you should see a new window with your Termonad running.
Termonad is similar to XMonad. The above steps will install a termonad binary
somewhere on your system. If you have installed Termonad using stack, the
termonad binary will be in ~/.local/bin/. This binary is a version of
Termonad configured with default settings. You can try running it to get an idea
of what Termonad is like:
$ ~/.local/bin/termonadThe following section describes the default key bindings.
If you would like to configure Termonad with your own settings, first you will
need to create a Haskell file called ~/.config/termonad/termonad.hs. A following
section gives an example configuration file.
If this configuration file exists, when the ~/.local/bin/termonad binary
launches, it will try to use GHC to compile the configuration file. If GHC
is able to successfully compile the configuration file, a separate binary will
be created called something like ~/.cache/termonad/termonad-linux-x86_64.
This binary file can be thought of as your own personal Termonad, configured
with all your own settings.
When you run ~/.local/bin/termonad, it will re-exec
~/.cache/termonad/termonad-linux-x86_64 if it exists.
However, there is one difficulty with this setup. In order for the
~/.local/bin/termonad binary to be able to compile your
~/.config/termonad/termonad.hs configuration file, Termonad needs to know
where GHC is, as well as where all your Haskell packages live. This presents
some difficulties that will be discussed in a following section.
Termonad provides the following default key bindings.
| Key binding | Action |
|---|---|
| Ctrl Shift t | Open new tab. |
| Ctrl Shift w | Close tab. |
| Ctrl Shift f | Open Find dialog for searching for a regex. |
| Ctrl Shift p | Find the regex above the current position. |
| Ctrl Shift i | Find the regex below the current position. |
| Ctrl + | Increase font size. |
| Ctrl - | Decrease font size. |
| Ctrl PgUp | Switch to previous tab. |
| Ctrl PgDown | Switch to next tab. |
| Alt (number key) | Switch to tab number. For example, Alt 2 switches to tab 2. |
Termonad has two different ways to be configured.
The first way is to use the built-in Preferences editor. You can find this in
the Preferences menu under Edit in the menubar.
When opening Termonad for the first time, it will create a preferences file at
~/.config/termonad/termonad.yaml. When you change a setting in the
Preferences editor, Termonad will update the setting in the preferences file.
When running Termonad, it will load settings from the preferences file. Do not edit the preferences file by hand, because it will be overwritten when updating settings in the Preferences editor.
This method is perfect for users who only want to make small changes to the Termonad settings, like the default font size.
The second way to configure Termonad is to use a Haskell-based settings file,
called ~/.config/termonad/termonad.hs by default. This method allows you to
make large, sweeping changes to Termonad. This method is recommended for power
users.
WARNING: If you have a ~/.config/termonad/termonad.hs file, then all
settings from ~/.config/termonad/termonad.yaml will be ignored. If you want
to set ANY settings in ~/.config/termonad/termonad.hs, then you must
set ALL settings in ~/.config/termonad/termonad.hs.
The following is an example Termonad configuration file. You should save this to
~/.config/termonad/termonad.hs. You can find more information on the available
configuration options within the
Termonad.Config
module.
{-# LANGUAGE OverloadedStrings #-}
module Main where
import Termonad.App (defaultMain)
import Termonad.Config
( FontConfig, FontSize(FontSizePoints), Option(Set)
, ShowScrollbar(ShowScrollbarAlways), defaultConfigOptions, defaultFontConfig
, defaultTMConfig, fontConfig, fontFamily, fontSize, options, showScrollbar
)
import Termonad.Config.Colour
( AlphaColour, ColourConfig, addColourExtension, createColour
, createColourExtension, cursorBgColour, defaultColourConfig
)
-- | This sets the color of the cursor in the terminal.
--
-- This uses the "Data.Colour" module to define a dark-red color.
-- There are many default colors defined in "Data.Colour.Names".
cursBgColour :: AlphaColour Double
cursBgColour = createColour 204 0 0
-- | This sets the colors used for the terminal. We only specify the background
-- color of the cursor.
colConf :: ColourConfig (AlphaColour Double)
colConf =
defaultColourConfig
{ cursorBgColour = Set cursBgColour
}
-- | This defines the font for the terminal.
fontConf :: FontConfig
fontConf =
defaultFontConfig
{ fontFamily = "DejaVu Sans Mono"
, fontSize = FontSizePoints 13
}
main :: IO ()
main = do
colExt <- createColourExtension colConf
let termonadConf =
defaultTMConfig
{ options =
defaultConfigOptions
{ fontConfig = fontConf
-- Make sure the scrollbar is always visible.
, showScrollbar = ShowScrollbarAlways
}
}
`addColourExtension` colExt
defaultMain termonadConfThere are other example configuration files in the example-config/ directory.
If you want to test what all the colors look like, you may find it convenient
to use the
print-console-colors
package, which provides an executable called print-console-colors that prints
all of the colors for your terminal.
If you launch Termonad by calling ~/.local/bin/termonad, it will try to
compile the ~/.config/termonad/termonad.hs file if it exists. The problem is
that ~/.local/bin/termonad needs to be able to see GHC and the required
Haskell libraries to be able to compile ~/.config/termonad/termonad.hs.
There are a couple solutions to this problem, listed in the sections below.
(These steps are definitely confusing. I would love to figure out a better way to do this. Please submit an issue or PR if you have a good idea about how to fix this.)
If you originally compiled Termonad with stack, you can use stack to
execute Termonad. First, you must change to the directory with the Termonad
source code. From there, you can run stack exec:
$ cd termonad/ # change to the termonad source code directory
$ stack exec -- termonadstack will pick up the correct GHC version and libraries from the
stack.yaml and termonad.cabal file. termonad will be run in an
environment with GHC available. termonad will use this GHC and libraries to
compile your ~/.config/termonad/termonad.hs file. It if succeeds, it should
create a ~/.cache/termonad/termonad-linux-x86_64 binary.
If you need extra Haskell libraries available when compiling your
~/.config/termonad/termonad.hs file, you can specify them to stack exec:
$ stack exec --package lens --package conduit -- termonadThe problem with this is that stack exec changes quite a few of your
environment variables. It is not recommended to actually run Termonad from
within stack exec. After you run stack exec -- termonad and let it
recompile your ~/.config/termonad/termonad.hs file, exit Termonad.
Re-run Termonad by calling it directly. Termonad will notice that
~/.config/termonad/termonad.hs hasn't changed since
~/.cache/termonad/termonad-linux-x86_64 has been recompiled, so it will
directly execute ~/.cache/termonad/termonad-linux-x86_64.
Building Termonad with nix (by running nix-build in the top
directory) sets it up so that Termonad can see GHC. Termonad should be able
to compile the ~/.config/termonad/termonad.hs file by default.
If you're interested in how this works, or want to change which Haskell
packages are available from your ~/.config/termonad/termonad.hs file, please
see the documentation in the
.nix-helpers/termonad-with-packages.nix
file.
Termonad has the following goals:
-
fully configurable in Haskell
There are already many good terminal emulators. However, there are no terminal emulators fully configurable in Haskell. Termonad fills this niche.
-
flexible
Most people only need a terminal emulator that lets you change the font-size, cursor color, etc. They don't need tons of configuration options. Termonad should be for people that like lots of configuration options. Termonad should provide many hooks to allow the user full control over its behavior.
-
stable
Termonad should be able to be used everyday as your main terminal emulator. It should not crash for any reason. If you experience a crash, please file an issue or a pull request!
-
good documentation
The documentation for Termonad on Hackage should be good. You shouldn't have to guess at what certain data types or functions do. If you have a hard time understanding anything in the documentation, please submit an issue or PR.
If you find a bug in Termonad, please either send a PR fixing it or create an issue explaining it.
If you just need help with configuring Termonad, you can either join the Gitter room or #termonad on irc.freenode.net.
Contributions are highly appreciated. Termonad is currently missing many helpful configuration options and behavior hooks. If there is something you would like to add, please submit an issue or PR.