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Arcadia IDE

version 1.1.1

by Antonio Galeone on Sep 29, 2015


Arcadia is a light editor (IDE) for Ruby language written in Ruby using the classic Tcl/Tk GUI toolkit and developed with Arcadia itself.

Some of Arcadia IDE project features include:

  • Editor with source browsing, syntax highlighting, code completion
  • Working on any platform where Ruby and Tcl-Tk work.
  • Debugging support
  • Highly estensibile architecture.

How to install

  • exec on command line "gem install arcadia"

How to run

  • exec on command line "arcadia"




[1.1.1] This release:

  • bug fixed [issue #58]

[1.1.0] This release:

  • added possibility to define custom runner: go to "run current" menubutton and click on "Manage runner ...". A dialog window will open. You can do actions as: "add new runner", "copy a runner", "delete a personal runner", "save". The list of runners is usable also in "Dir Projects".

    These are keywords that you can use in cmd definitions (see preconfigured runners): <> ruby interpreter <> current file <

    > current dir <<FILE_BASENAME>> basename of current file <<FILE_BASENAME_WITHOUT_EXT>> basename of current file without extension <<INPUT_FILE>> open select file dialog to get file <<INPUT_DIR>> open select dir dialog to get dir <<INPUT_STRING>> open select string dialog to get a generic string

  • on ruby >= 2.0 added runner "debug selected as ruby file in console"

  • on ruby >= 2.0 discontinued dependence from rdebug gem

  • done changes for ruby >= 2.0 and tck/tk 8.6 compatability

  • improved "Output", added option to auto open in editor a file, usefull with the runner "debug selected as ruby file in console"

  • fixed bugs

  • introduces other general improvements


  • improves crossplatform features
  • changes dialogs metaphor
  • improves start speed
  • introduces other general improvements


  • added Russian translation (Thanks to Michael)
  • bug fixes and various improvements


  • improves file-history introducing bookmarks management
  • improves layout
  • fixes bugs


  • this release adds support to debugger gem and fixes minor bugs


  • fixed bug in file-history


  • added new extension : terminal's integration from Projects' navigator you can now open a terminal from selected directory in linux is required xterm and xdotool (xterm is embedded like a other frame)
  • buffers' interchange between more instance of editor
  • introduced internationalization of text : in conf/LC/ are searched translation files in format .LANG (es. en-UK.LANG) locale is settable in ~/.arcadia/arcadia.conf overriding default (locale=en-UK) ... collaborations in translations are welcome!
  • added possibility to interact with running application typing input in output's console
  • introduced in file-history a new kind of view (list view) activable by button on toolbar
  • bugs fixed and optimizations


  • rubygems
  • ruby-tk
  • tcl/tk
  • tk-tile (if Tcl/Tk < 8.5)
  • ctags (Linux)
  • xterm (Linux, optional)
  • xdotool (Linux, optional)
  • ack (optional)
  • gem coderay (> 1.0)
  • gem debugger (only for Ruby < 2.0)
  • gem win32-process (only on Windows)
  • gem ruby-wmi (only on Windows)

Short User guide

Application layout is splitted in vertical and horizontal resizable frames. On vertical and horizontal splitter two button appear for left or right one shot frame closing. Every frame has a title, a button to expand or resizing it and a menu-button for dynamic layout functions (like add row, add column, close or for move a frame).

Main Toolbar

The toolbar button are in order:

  • new, open, save, find (relatively to edit/find operation) after "new" there is a menubutton to choose a type of file
  • new, open Dir Project, search in files, Open terminal from current folder, Toggle bookmark
  • run current, run last (for execute the raised file in the editor or the last runned file)
    after "run current" there is a menubutton to choose a configurated runner to apply at current file
  • (on ruby < 2.0) debug current, debug last, quit debug panel
  • quit (to exit from arcadia)


Editor can use the notebook metaphor. Same command are on the popup menu that is raised on "Button-3" click event fundamentally for closing the tab under the mouse pointer. These are same editor short-cut:

  • Ctrl-c => copy selected text

  • Ctrl-v => paste copied text

  • Ctrl-x => cut selected text

  • Ctrl-g => show go to line dialog

  • Ctrl-o => open file dialog

  • Ctrl-d => close file dialog

  • Ctrl-z => undo

  • Ctrl-r => redo

  • Ctrl-f => copy the selected text on input combobox of find dialog and moves focus

  • Ctrl-s => save

  • Ctrl-space or esc => completion code

  • Ctrl-shift-i or Tab => indent the selected block

  • Ctrl-shift-u or Shift-Tab => unindent the selected block

  • Ctrl-shift-c => comment/uncomment the selected code block

  • Alt-shift-a => select all

  • Alt-shift-i => invert selection

  • Alt-shift-u => selected to uppercase

  • Alt-shift-l => selected to lowercase

  • F5 => execute the current file

  • F3 => find/ find next

  • Ctrl-F3 => Search in files

  • Double-Click on line number set or unset a debug breakpoint

Project drawer

It is a navigational tree:

  • open or create dir as project
  • make commons file system activity (by contextual menu)
  • make custom action (by runners)
  • open terminal from selected dir

File history

The last used files are organizing in tree so you can reopen them or their directory by clicking on the tree node.


Require debugger gem and ruby < 2.0. It is created when a debug session init. The debug button are: Step Next, Step Into, Step Over, Resume and quit. The debug frame show the local, instance and global variables for each step.

NOTE: at this moment on ruby >= 2.0 you can debug by using "debug selected as ruby file in console" runner and optionally on "Output" the flag "auto open file in editor" using standard ruby debug input commands:

Debugger help v.-0.002b Commands b[reak] [file:|class:]<line|method> b[reak] [class.]<line|method> set breakpoint to some position wat[ch] set watchpoint to some expression cat[ch] (|off) set catchpoint to an exception b[reak] list breakpoints cat[ch] show catchpoint del[ete][ nnn] delete some or all breakpoints disp[lay] add expression into display expression list undisp[lay][ nnn] delete one particular or all display expressions c[ont] run until program ends or hit breakpoint s[tep][ nnn] step (into methods) one line or till line nnn n[ext][ nnn] go over one line or till line nnn w[here] display frames f[rame] alias for where l[ist][ (-|nn-mm)] list program, - lists backwards nn-mm lists given lines up[ nn] move to higher frame down[ nn] move to lower frame fin[ish] return to outer frame tr[ace] (on|off) set trace mode of current thread tr[ace] (on|off) all set trace mode of all threads q[uit] exit from debugger v[ar] g[lobal] show global variables v[ar] l[ocal] show local variables v[ar] i[nstance] show instance variables of object v[ar] c[onst] show constants of object m[ethod] i[nstance] show methods of object m[ethod] <class|module> show instance methods of class or module th[read] l[ist] list all threads th[read] c[ur[rent]] show current thread th[read] [sw[itch]] switch thread context to nnn th[read] stop stop thread nnn th[read] resume resume thread nnn pp expression evaluate expression and pretty_print its value p expression evaluate expression and print its value r[estart] restart program h[elp] print this help evaluate


Same Arcadia properties are locally configurabled by editing the file arcadia.conf under ~/.arcadia directory. The format of property definition are: PROPERTY_NAME=PROPERTY_VALUE

I have tested arcadia with ruby 1.8, 1.9, 2.x on

  • Archlinux
  • Ubuntu/Mint
  • Fedora
  • FreeBsd,
  • Vector linux,
  • Mac OS X
  • Windows 2000/XP/7,
  • Cygwin (note: same page fault error on dll under cygwin may be solved in this way: by ash.exe exec "/bin/rebaseall")

Developers e general information

Released on arcadia web site (


Arcadia is released under the Ruby License


For all questions:

For bugs, support request, features request:

Repository at: