REPL Driven Development

gistfile1.txt

$ irb
> class Person
attr_accessor :name
end
> person = Person.new name: 'Alejandro'
> current_session.dump('world.session')
> exit

$ irb
> person.name # => NameError...
> load_session('world.session')
> person.name # => 'Alejandro'
> Person.source.to_s # => "class Person\nattr_accessor :name\nend"
> edit Person # fires up the editor showing the source code for Person and updates the code upon editor save
> module A
  def foo
  end
end
> module A::B
  def spam
  end
end
> class A::C
  def egg
  end
end
> edit A # fires up the editor showing a subtree with the following files: a.rb, a/b.rb, a/c.rb

With Pry:
[1] pry(main)> def hello
[1] pry(main)* puts "Hello!"
[1] pry(main)* end
=> :hello
[2] pry(main)> hello
Hello!
=> nil
[3] pry(main)> edit hello
[5] pry(main)> hello
HELLO! (Edited)
=> nil
[6] pry(main)>

@breezeight

cool :-)

unfortunately it doesn't work with class definitions:

[7] pry(main)> class Asd
[7] pry(main)* def foo
[7] pry(main)* end
[7] pry(main)* end
=> :foo
[8] pry(main)> edit Asd
Error: Cannot find a file for Asd!

By the way it's a good start :-)

you can edit a single method:
[1] pry(main)> class A
[1] pry(main)* def hello
[1] pry(main)* puts "Hello"
[1] pry(main)* end
[1] pry(main)* end
=> :hello
[2] pry(main)> edit A #ERROR
Error: Cannot find a file for A!

[3] pry(main)> edit A#hello #IT WORKS
[6] pry(main)> A.new.hello
Hello!!!
=> nil