Minimalist Editor for Ruby, Rails and Other Languages
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Minimalist Editor for Ruby, Rails and Other Languages


Under development (Feburary 2011)

Current v0.0.2

  • Syntax highlighting
  • Load mulitple files (from command line)
  • Save (CTRL+S)
  • Switch files (CTRL+TAB).

It should be stable but there isn't much to it yet.

Next v0.0.3

  • Show Keyboard shortcuts (F1)
  • Open file in the current window with fuzzy matcher (CTRL+O)
  • Close file (CTRL+W)

Checkout the ROADMAP for more.


An editor for Ruby, Rails and supporting langauges, written in pure Ruby (1.9) and GTK using some Rails idioms with an open design to allow customization and enhancement.


To install: gem install merrol

To run: m [file1, file2, ...]

Currently only tested on Ubuntu 10.04. It will check the required packages are installed and prompt to install them if not.


I noticed, while using other editors that I found myself constantly re-arranging windows to get the optimum setup. I was also frustrated by little bugs, design issues and lack of sensible shortcuts. I thought, there must be a better way.

I want to make an editor that is really easy to tweak. Users would be able to fork it and customize it as they saw fit. It will also make use of existing apps such as autotest and rails generators and commands such as grep.

I want to try something different. To create an editor that is focused on BDD and TDD from the ground up.


To get the most out of a screen whether it's a 30" desktop or a 13" laptop. Control screens without having to resize windows. Maximize the workspace.

Foremost, it will be a Rails and Ruby editor with an emphasis on Behaviour and Test Driven Development. There will be nothing stopping it being customized for other languages or being forked to change behaviour.

No toolbars, menus, icons or any other extra fluff. Straightforward shortcuts will allow access to all functions.

It will be robust, built with well factored, well tested, pure Ruby code.

There will be no dialogs. Panels will allow a more versatile and accessible way to accept input.

Support multiple instances for loading different application directories.

It will be developed primarily for the Linux OS in particular it uses ruby GNOME 2. However, this is a cross platform library so it should work on Windows and Mac OS.


It will not be a full blown IDE. There are plenty of these about and I don't believe they are necessary for Ruby or Rails development.

It will not support TextMate bundles.

A plugin system is not currently planned.

Code-folding will never be supported. If you need code-folding your files are too big.


  • Fuzzy File Panel - Open, create and rename files quickly and easily by pattern matching and selection. Starts with a folder view to aid navigation. Supports exclusions via .gitignore and globs (configurable, obviously)
  • Written with pure Ruby version 1.9.2 and Ruby-GNOME2
  • Fast startup time