mruby.el

This is a test package of dynamic module feature which is implemented in Emacs 25.

mruby.el provides interface to mruby make interface to embed mruby into go.

Setup

Dynamic module feature is implemented only in emacs-25 branch. So you need to build Emacs which enables dynamic module feature.

Build Emacs

% git clone git://git.savannah.gnu.org/emacs.git
% cd emacs
% git checkout -b emacs-25 origin/emacs-25
% ./configure --with-modules --prefix=installed_path # You must set --with-modules
% make
% make install

Building this plugin

% cd modules
% git clone --recursive https://github.com/syohex/emacs-mruby-test.git
% make

Evaluate mruby code

(let ((mrb (mruby-init)))
  (mruby-eval mrb "ARGV.map {|x| x + 1}" 1 2 3))
;; => [2 3 4]


(let ((mrb (mruby-init)))
  (mruby-eval mrb
              "
def fizzbuzz(num)
  (1..num).map do |n|
    case
    when n % 15 == 0 then \"fizzbuzz\"
    when n % 5  == 0 then \"buzz\"
    when n % 3  == 0 then \"fizz\"
    else n
    end
  end
end

fizzbuzz(ARGV[0].to_i)
" 20))

;; => [1 2 "fizz" 4 "buzz" "fizz" 7 8 "fizz" "buzz" 11 "fizz" 13 14 "fizzbuzz" 16 17 "fizz" 19 "buzz"]

Call mruby function for elisp objects

;; Apply 'Fixnum#abs' for Emacs Lisp integer value
(let ((mrb (mruby-init)))
  (mruby-send mrb -10 'abs))
;; 10

;; Apply 'String#swapcase' for Emacs Lisp string value
(let ((mrb (mruby-init)))
  (mruby-send mrb "hello WORLD" 'swapcase))
;; => "HELLO world"

;; Apply 'Array#flatten' for Emacs Lisp vector value
;; [NOTE] You must use vector instead of list for Ruby Array feature
(let ((mrb (mruby-init)))
  (mruby-send mrb [1 [2 3] [4 [5 6]]] 'flatten))
;; => '[1 2 3 4 5 6]

License

This software is released under the GPLv3+.
mruby is released under the MIT License.