mruby/mruby — pull request #1523 by wrl (2013-10-01 18:45:17+00:00)
Title: Implement gembox-relative gemdir paths

In the case where a relative path is specified to a gembox from
build_config.rb, it was previously tricky to specify relative gem paths
from inside that gembox.

For example, consider a project in which mruby is checked out as a
submodule in the project root:

+- project_root
|
+- mruby/
| |
| +- build_config.rb
| |
| +- ...
|
+- my_gembox/
|
+- my_gembox.gembox
|
+- my_gem/
|
+- mrbgem.rake
|
+- ...

If build_config.rb refers to my_gembox with a relative path, it's
difficult for my_gembox to then refer to my_gem. With this proposed
change, my_gembox.gembox can look like this:

MRuby::GemBox.new do |conf|
conf.gem "my_gem"
end

@bovi, @matz