Implement rbs diff command

[ksss]

Design

#1448

Note

To ship the smallest increment, the option to display the defined position is not implemented.

Feature

• instance methods
• singleton methods
• constants

Future Plans

• Support mixin, ivar, cvar
• Add option to print defined_in and visibility
• load manifest.yaml

Demo

Show differences in ActiveStorage::Attachment class between v6.0 and v6.1 of activestorage.

$ bundle exec rbs --no-collection diff --format diff --type-name ActiveStorage::Attachment --before ../gem_rbs_collection/gems/activestorage/6.0 --after ../gem_rbs_collection/gems/activestorage/6.1
- def self.has_one_attached: (::String | ::Symbol name, ?dependent: ::Symbol dependent) -> void
+ def self.has_one_attached: (::String | ::Symbol name, ?dependent: ::Symbol dependent, ?service: ::String | ::Symbol | nil service, ?strict_loading: bool strict_loading) -> void

- def self.has_many_attached: (::String | ::Symbol name, ?dependent: ::Symbol dependent) -> void
+ def self.has_many_attached: (::String | ::Symbol name, ?dependent: ::Symbol dependent, ?service: ::String | ::Symbol | nil service, ?strict_loading: bool strict_loading) -> void

[soutaro]

🎉