Furnther. Loads of textmate bundles have spec.rb as their file type. This would be a really useful feature.

I am facing the same bug. This keymap is active on all types of files, so the context is not working.

{ "keys": ["super+shift+x"], "command": "something_cool", "context" : [ { "key": "selector", "operator": "equal", "operand": "source.ruby", "match_all": true } ]}