I've tried dropping bz2redmine into a temp directory and running it as the readme suggests:
sudo ruby bz2redmine.rb
...but I get an error:
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- settings (LoadError)
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from bz2redmine.rb:29:in `<main>'
The settings.rb file is in the same directory as the bz2redmine script.
What am I missing?
Turned out to be a bug in the migration script: https://github.com/ralli/bz2redmine/issues/8