Purpose of Underscore method in Buildr

Question

Can anyone explain the purpose of the "_" (underscore) in the following code? Thanks.

package(:zip).include _('target/docs/*')

Answer 1

In Buildr, the underscore method is an alias to the path_to method:

_('foo', 'bar')
# => foo/bar
_('/tmp')
# => /tmp
_(:base_dir, 'foo')
# => /home/project1/foo