Best practices to write a Merb Plugin. Learn when you should use Plugins and when you should use Slices. Presentation given by Matt Aimonetti during MerbCamp 2008

1. Merb
Plugins
1 0 1

2. Matt
Aimonetti Me
irc: m a t t e t t i

3. Merb::Slices

4. Merb::Slices
reusable

5. Merb::Slices
reusable
overwritable

6. Merb::Slices
reusable overwritable
mini apps

7. Merb::Slices
osimer
than
generated
code

8. Merb::Slices
login form
password reminder
blog
forum
event registration
admin interface
tune up
...

9. Merb::Slices
When?
target application
content

10. Merb::Plugins

11. Merb::Plugins
NOT DataMapper plugins!

12. Merb::Plugins
When?

13. Merb::Plugins
When?
target extending the
framework

14. Merb::Plugins
Merb::Plugins
!=
Rails Plugins

15. Merb::Plugins
alias_method_chain
=
evil

16. Merb::Plugins
provides :hooks

17. Merb::Plugins
Merb::BootLoader

18. Merb::Plugins
Merb::BootLoader.before_app_loads
Merb::BootLoader.after_app_loads

19. Merb::Plugins
Merb API
@private
@public
@plugin/overridable

20. Merb::Plugins
Merb API
if it fails your expectations
contact us (srly)

21. Merb::Plugins
Merb::Plugins.config[:merb_osim]

22. Merb::Plugins
Merb::Plugins.add_rakefiles
quot;merb_osim/merbtasksquot;

23. Merb::Plugins
test through the stack!

24. default_options = {
:environment => 'test',
:adapter => 'runner',
:merb_root => File.dirname(__FILE__) / 'full-stack',
:log_file => File.dirname(__FILE__) / quot;merb_test.logquot;
}
options =
default_options.merge($START_OPTIONS || {})
Merb.disable(:initfile)
Merb.start_environment(options)

25. Merb::Plugins
¿ORM?

26. Merb::Plugins
no rules
but make sure
you develop a clean API
to let other people extend
your plugin

27. Merb::Plugins
Merb ORM interfacerb 1.x
M e

28. Merb::Plugins
e x t l i b
http://github.com/sam/extlib

29. Merb::Plugins
v e r s i o n
dependency quot;merb-corequot;, quot;= 1.0quot;
dependency quot;merb-corequot;, quot;<= 2.0quot;

30. Merb::Plugins
e x a m p l e s
http://github.com/wycats/merb-more
http://github.com/wycats/merb-plugins

31. Merb::Plugins
¿ h e l p ?
irc://irc.freenode.net/merb
http://groups.google.com/group/merb

32. T h a n k s