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ash is a simple and clean terminal-based text editor, that aims to be easy to use with modern key-bindings. It is capable of handling multiple files simultaneously and has a wide array of modern features. Here is a picture of ash editing this README file:

Screenshot

ash is written in Python 3.8 using the curses library.

Features
Release Notes
Requirements
Installation
Prebuilt binaries
Customization
Usage
Contributing
Screenshots
License

Features

The following is a list of features available in ash:

Easy to use, clean and intuitive interface
Common key bindings (Help on F1, Arrow keys for movement, Shift+Arrow/Home/End/PgUp/PgDown for selecting text, cut/copy/paste using Ctrl+X/C/V, undo/redo using Ctrl+Z/Y, find/replace/goto using Ctrl+F/H/G, etc.) and support for remapping key bindings to your taste
Common editor features such as undo/redo, line numbers, find-replace, cut-copy-paste, etc.
True support for wrapping (both hard & soft) with intuitive cursor movements along wrapped text
Multi-file editing with support for windows and tabs
Auto-backup
Support for Unicode
Project mode (opening a directory instead of individual files)
Complete session (for projects) and undo persistence (turned on for projects opened directly from command-line)
Live search
Support for search/replace in all open files
Support for searching using regular expressions
Auto-indentation, Select+Tab/Shift-Tab to increase/decrease indent
Auto insertion of matching braces/quotes and auto-enclosure when text is selected and braces/quotes are typed
Support for unlimited splits per tab (subject to screen size) and support for unlimited tabs
Support for various text-encodings
Checks (live) and reloads (if user permits) files which have been modified externally
Selection highlighting (highlights text under selection wherever they occur in the document)
Color scheme customization
View list of recent files, view project explorer (in project mode)
Syntax highlighting (limited)
Git integration (shows untracked, modified files, etc.)
Multiple Cursors
Command palette
Basic mouse support (click to select, right-click, drag to select text, double-click to select word, triple-click to select line, drag to move dialog-boxes, etc.)
Open terminal / execute shell commands
Limited IDE features like compile, build, execute...
Supports project/folder specific settings along with global settings
Multi-language support
Support for snippets

Requirements

You need a resolution of at least 102 x 22 in your terminal emulator
Your terminal must support Unicode and be able to display at least 256 colors with the capability of remapping color palettes (Works best on: xterm-256). Monochrome terminals are also partially supported.
If you are running the source distribution, you need the GNU C compiler collection besides Python 3.8, as some parts of the application are written in Cython. The first time you run the application, Cython will compile and build the *.pyx files, which may increase load time (Ignore the warnings during compilation)

ash is primarily targetted to Linux. This version of ash has only been tested on Ubuntu 20.04 with Python 3.8.2 (64-bit)

Installation

Note: Instructions provided here are for Debian/Ubuntu based systems. For your distribution, you may need to issue different instructions to install the necessary packages.

Prerequisites

You need certain packages and Python 3 itself to run ash on your system, as there are no prebuilt binaries available yet.

$ sudo apt install git
$ sudo apt install xclip
$ sudo apt install python3
$ sudo apt install python3-pip

Depending on your system, you may also need to install the following packages:

$ sudo apt install python3-devel

Installing ash

You have multiple options here:

Install from PyPi (recommended)
Install the latest stable release from GitHub
Install the latest nightly release from GitHub
Build and install from source

Install from PyPi

Execute the following instructions to install from PyPi:

$ sudo pip3 install ash-editor

The above command downloads ash and installs it locally on your system. To be able to invoke ash from anywhere, see the Setting Paths section.

Install the latest stable release

Note: the stable release may not contain all features listed above

Go to the ash Website and download the latest stable release. Then extract the downloaded tar-ball into a folder and once inside that folder, open up your terminal from there and execute:

$ sudo pip3 install .

Install the latest nightly release

The nightly builds contains all the latest features of ash. Go to the ash Website and download the latest nightly release. Then extract the downloaded tar-ball into a folder and once inside that folder, open up your terminal from there and execute:

$ sudo pip3 install .

Build from source and install

To build from source, issue the following instructions:

$ sudo apt install git
$ cd ~
$ git clone --depth 1 -b master https://github.com/akashnag/ash.git
$ cd ash
$ python3 setup.py sdist

(Though you can install it directly from here, it is not recommended) You will find the new tar-ball created under dist directory, from where you can proceed as before by first copying the tarball into a new directory, extracting it, and then installing it.

Setting paths

To run ash make sure you have :$HOME/.local/bin appended to your $PATH variable in the file ~/.bashrc (If you are using bash as your shell. If not open your corresponding .rc file). To execute ash, see the Usage section.

Uninstalling ash

To uninstall ash you can use:

$ sudo pip3 uninstall ash-editor

Prebuilt binaries

Since ash is still under development, prebuilt binaries are not yet available. You can use PyInstaller or similar tools to build one for your system.

Usage

Once you have downloaded the ash source code, and set it up as detailed above, you are ready to use it.

NOTES:

If you have not updated your path variable, you must specify the full path to the ash binary.
Your terminal resolution should be at least 102 (width) x 22 (height). Opening the editor in a lower resolution may unexpectedly crash the application. This requirement is necessary to properly display the dialog-boxes.
It will take a while to start up ash for the first time, this is normal. From the second time onwards, it should start up faster.

To run ash:

$ ash path/to/file.txt

or, to open an empty buffer:

$ ash

or, to open a project (directory):

$ ash path/to/directory

See the Key Bindings for help on how to navigate in ash.

Contributing

Contributing to the source code

If you find any bugs, please report them. I am also happy to accept pull requests from anyone for either bug-fixes, performance improvements, or for implementing the not-yet-implemented features listed above. Please consider contributing towards new features only when the features listed above have been fully implemented. For more information on what features to implement and the project structure, see the Contribution Guidelines

Bug-fixes and feature enhancements

You can use the GitHub issue tracker to report bugs, ask questions, or suggest new features. You can include the log if that is relevant, which can be found in ~/.config/ash-editor/log.txt.

Discussions

For discussions related to the development roadmap and the ash editor in general, you can join the ash Discord Server.

Say Thanks!

If you are not into software development, you can still contribute financially. Financial contributions help me prioritize working on this project over others and helps me know that there is a real demand for this software.